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sample discussion


– while I connect sip 5 bcu like that error I got ..how can I solve that
– Differential initial setting is 0.2*In?
– What is the meaning of it?

– Anybody has breaker dcrm result & procedure for testing breaker dcrm with megger TM1740 kit.
– I think the problem is your RAM
– maybe you can upgrade it to 8GB or 16GB.


– What is this problem?
– Install the device driver for 7sj80
– My breaker got tripped on differential Relay is not showing any current
-87BD In phase R,Y,B But no current
– W1 or W2
– Its tap changing problem
– It is due to an imbalance of voltage
– Tap was not changed. In relay 5th harmonic and 2nd harmonic is blocked.
– Not showing any winding
– I just updated the firmware of my 7SA82 relay from 7.82 to 8.06, now the relay shows firmware 8.06 but CFG 7.82, when I go to the device information page of offline extracted settings, here upgrade option is missing at configuration version, please guide how can I get upgrade option


here you can see, upgrade option is not there near CFG


this is what the manual shows, but in my case, this upgrade option is not there as you can see in the above picture.
– Did u import the communication firmware for this device?
– issue resolved, by following this “You can go to “Upgrade project device” in the project tree, and you will find for upgrade CFG”

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– Getting this error when installing digsi 4.94, plz help
– When I am taking megger for pt primary to secondary, then when taking b/w primary and 1a and primary getting 400 Mega ohms, and primary to 1n getting 1.9 Giga. Ohm, why is the difference?
– What is the applied test voltage?
– 5kV
– Remove secondary connections either connected 1a or 1n. Apply test voltage case1: primary to 1a
Case 2: primary to 1n. The values more or less should come the same. Sometimes it will show some difference due to testing machine (Megger) measurement and also ambient temperature(T)
– IN 7SR relay where to find Characteristic angle?
– Using reydisp evolution
– take pri. to earth at 5kv and seco. to earth at 500 v
– Anybody tested the GIPAM 10NZ relay? Where is direction selection for 67G SGR Protection In software?
– Check-in current protection folder
– +-45 by default


Click on the picture for our DIGSI 4 Training

– any ziv zlv distance protection engineer urgent need, Unbalance settings are given 30%
– How to test and justify this 30%
– How to Test 100% Stator Earth fault protection?
– With 3rd Harmonic. It is the power setting. When u give the fault with power above 30%. Then only the relay will be active.
– Which relay Model?
– 7UM622
– Control cable length is 700mtr, then how to calculate voltage drop.

– if 220 kv or any kv panel which receiving end panel thus their relationship angle between v-i is 180 degrees apart.? is this right?

WhatsApp number to join our discussion groups: +989129613659


– Vph to Vph selected. The setting is 121 V
– Then for secondary injection how to inject?
– How to test under excitation protection in Siemens relay 7UM?
– U have to first take the capability curve of the generator and then on under excitation side make 3 part one at 0deg angle, 90deg angle, and 120 deg angle
– For each angle, u will get a certain MW and Mvar which u can inject through ur secondary injection kit in terms of voltage and current?


PSCAD training information: https://elec-engg.com/pscad-training-for-protection-engineers/

– Can anyone provide the DNP3 protocol standard?
– On the upper side of Relay Ready LED is Blinking. That’s why it’s not communicating by software, How to fix it
– which led?
-Ready LED
– relay faulty indiction is going on annunciation.
– No annunciation is coming on other. but I think the relay gets faulty.

– Is relay restarting again and again? Because it blinks when in test mode
– Is it in test mode?
– Is it rebooting
– u can also check the error code in the relay
– Not rebooting
– HMI working properly
– When you read the data from relay through software what error it is showing
22abb , 10:38 – abb pcm 600: oh ABB show on the display
22abb , 10:38 – abb pcm 600: this is error inside
22abb , 10:38 – abb pcm600: Not communicating with software
22abb , 10:39 – abb pcm 600: must repair
22abb , 10:40 – abb pcm 600″: What is the fault code relay is showing
22abb , 10:41 – abb pcm 600″: Like 2,7,8,10,43,44 etc
22abb , 10:41 – abb pcm600: Not showing any fault
22abb , 10:41 – abb pcm 600″: Or warning code
22abb , 10:41 – abb pcm600: Only ready LED is Blinking
22abb , 10:41 – abb pcm600: Nathing
22abb , 10:42 – abb pcm 600″: Share this screen
22abb , 13:30 – abb pcm600:

https://elec-engg.com/whatsapp-group-for-protection-engineers/


22abb , 13:31 – abb pcm600: Please check
22abb , 13:32 – abb pcm 600″: Laptop screen
22abb , 13:34 – abb pcm600:
22abb , 13:35 – abb pcm600: Now communicated with relay
22abb , 13:35 – abb pcm600: But Blinking problem is not fixed
22abb , 13:37 – abb pcm 600″: Go to main menu/monitoring/IED status/ self supervison
22abb , 13:38 – abb pcm 600″: Check for faulty hardware module
22abb , 13:40 – abb pcm 600″: If it is a diagnostic failure then also it flashes
22abb , 13:40 – abb pcm 600″: Check IRF alarm contact status to find the reason
22abb , 13:42 – abb pcm 600″: It is a internal fault
22abb , 14:05 – abb pcm600: May be
22abb , 15:13 – abb pcm600:
22abb , 15:13 – abb pcm600:
22abb , 15:14 – abb pcm600: Why current in R phase so much high on normal voltage
22abb , 15:16 – abb pcm 600″: Load on r phase might be more as compared to other phases
22abb , 15:18 – abb pcm600: Normal voltage is injected
22abb , 15:19 – abb pcm 600: whats the ct ratio
22abb , 15:19 – abb pcm600: And normal current is injected
22abb , 15:19 – abb pcm600: 400/1
22abb , 15:19 – abb pcm 600: check backup relay
22abb , 15:19 – abb pcm 600: measurmnt
22abb , 15:20 – abb pcm 600: how mny core
22abb , 15:20 – abb pcm 600: in ct
22abb , 15:20 – abb pcm 600: 400-800-1200
22abb , 15:27 – abb pcm600: But i am injecting to relay directly
22abb , 15:27 – abb pcm 600: how
22abb , 15:27 – abb pcm 600: secondry set
22abb , 15:30 – abb pcm 600″: Check ct wiring
22abb , 15:30 – abb pcm 600″: Star point of relay
22abb , 15:31 – abb pcm 600″: Input
22abb , 15:31 – abb pcm 600″: Is correctly wired
22abb , 15:31 – abb pcm 600: star point is only for protction
22abb , 15:42 – abb pcm600: Star point is ok
22abb , 15:43 – abb pcm 600: r u injected or line is charge
22abb , 15:44 – abb pcm600: Relay is separated from PT CT,
22abb , 15:45 – abb pcm600: I am injecting current from omicron
22abb , 15:45 – abb pcm600: PT as well
22abb , 15:45 – abb pcm 600: ok
22abb , 15:46 – abb pcm 600: r u injecting balance current
22abb , 15:46 – abb pcm 600: 1 A
22abb , 15:46 – abb pcm600: Yes
22abb , 15:46 – abb pcm 600: check ct ratio
22abb , 15:46 – abb pcm 600: in the relay
22abb , 15:47 – abb pcm600: CT ratio is OK in relay
22abb , 15:47 – abb pcm 600: when u injecting
22abb , 15:47 – abb pcm 600: is there any currnt in IN
22abb , 15:47 – abb pcm600: Yes same as R phase
22abb , 15:48 – abb pcm 600: ok
22abb , 15:48 – abb pcm600: Check in this, it was fluctuating
22abb , 15:49 – abb pcm 600: inject only r phase
22abb , 15:49 – abb pcm 600: backside of relay terminal
22abb , 15:49 – abb pcm 600: not on tb
22abb , 15:51 – abb pcm600: That I am doing
22abb , 15:51 – abb pcm 600: ok
22abb , 15:53 – abb pcm600: It’s 934 A is showing when I inject only in R phase
22abb , 15:53 – abb pcm 600: Send me the pic of ct ratio
22abb , 15:53 – abb pcm 600: in the relay
22abb , 15:55 – abb pcm600: I will send relay file
22abb , 15:55 – abb pcm 600: ready led is blinking for this relay
22abb , 15:56 – abb pcm600: Yes
22abb , 15:56 – abb pcm 600: which modl
22abb , 15:56 – abb pcm 600: REL670
22abb , 15:56 – abb pcm600: Yes
22abb , 15:56 – abb pcm 600: ok
22abb , 15:56 – abb pcm 600: send me file
22abb , 15:59 – abb pcm 600:


22abb , 15:59 – abb pcm 600: send me this pic
22abb , 15:59 – abb pcm 600: in the rely
22abb , 16:00 – abb pcm600:
REL670.pcmi
22abb , 16:00 – abb pcm 600: pic snd krdo
22abb , 16:01 – abb pcm 600: instll krna pdega
22abb , 16:01 – abb pcm 600: pcm
22abb , 16:01 – abb pcm600: Ok
22abb , 17:18 – abb pcm600:
22abb , 17:19 – abb pcm600: I have imported this file, but why Protection is opening
22abb , 17:20 – abb pcm600: Protection is not opening
23abb , 10:59 – abb pcm 600″: Is circuit breaker contact resistance temperature dependent
23abb , 11:19 – abb pcm600: Yes the hotter it has higher value.
23abb , 11:21 – abb pcm600″: Yes
23abb , 14:51 – abb pcm 600 “: Yes.. That’s why you would have seen that the current is injected for a very short duration.. As not to elevate the temperature
23abb , 19:34 – abb pcm 600″: Does variations in input voltage affects breaker timing
23abb , 19:35 – abb pcm 600″: Input supply varies from 110V to 170V
23abb , 19:35 – abb pcm 600″: Ideal voltage is 110 V
23abb , 19:35 – abb pcm 600″: This message was deleted
23abb , 19:56 – abb pcm 600″: Please can anybody tell me this
23abb , 20:38 – abb pcm 600 “: Are you testing time or contact resistance
23abb , 20:39 – abb pcm 600″: Both
23abb , 20:39 – abb pcm 600″: 132 kV breaker close time =77 ms
23abb , 20:39 – abb pcm 600″: At160V
23abb , 20:40 – abb pcm 600: PT ki 110 v vary kr rhi h
23abb , 20:40 – abb pcm 600″: No pt
23abb , 20:41 – abb pcm 600″: Direct supply from AC source for testing
23abb , 20:41 – abb pcm 600: ac supply for kit
23abb , 20:42 – abb pcm 600″: No for breaker control supply
23abb , 20:42 – abb pcm 600: ok
23abb , 20:42 – abb pcm 600 “: Usually, the higher volts may not affect the timing but will damage the insulation of the coil
23abb , 20:42 – abb pcm 600″: Is this value is acceptable
23abb , 20:43 – abb pcm 600: ac supply use in brekr only for motor
23abb , 20:43 – abb pcm 600 “: Refer to the manual..
23abb , 20:43 – abb pcm 600″: Input ac supply for kit is 260V
23abb , 20:43 – abb pcm 600 “: For MV, I have less than 60ms for one while 40 ms for the other type
23abb , 20:43 – abb pcm 600″: Source is giving 260 V
23abb , 20:43 – abb pcm 600 “: So you have to compare with the values in manual
23abb , 20:44 – abb pcm 600″: Trip time is 46 ms,CO=39ms
23abb , 20:44 – abb pcm 600: accpt
23abb , 21:20 – abb pcm 600:
23abb , 21:20 – abb pcm 600: please check these angle diff. is correct or wrong
24abb , 11:01 – abb pcm 600:
24abb , 11:02 – abb pcm 600: Can you tell me what is the name of this marked portion?
24abb , 11:02 – abb pcm 600: And why it is connected there?
24abb , 13:02 – abb pcm 600: anyone have ETAP software
24abb , 13:04 – abb pcm600: Correct
24abb , 18:06 -abb pcm600: Its correct, inductive.
24abb , 18:09 -abb pcm600: Es un separador de fases
24abb , 18:13 -abb pcm600: Can anyone tell me this?
When i charge the 132kv line, then i get the all secondary 3phase voltage at the panel TB from line cvt.
But i trip the breaker, now the line remains back charge bcz of opposite end connected. In this case i get only R, B phase voltage from same line cvt. Y ph voltage is near to zero(i.e, y=7 v) How it is possible?
24abb , 18:15 – abb pcm 600: line pt install
24abb , 18:15 -abb pcm600: Mm installed
24abb , 18:16 – abb pcm 600: Mm means
24abb , 18:16 -abb pcm600: Sorry
24abb , 18:16 -abb pcm600: Yes installed
24abb , 18:16 – abb pcm600: May Y phase jumper opened in transmission line
24abb , 18:17 – abb pcm 600: please check from remote end
24abb , 18:17 – abb pcm 600: voltage
24abb , 18:28 -abb pcm600: No sir
24abb , 18:28 -abb pcm600: It also perfectly correct
24abb , 18:30 – abb pcm 600: remote end the all three voltage is perfect ?
24abb , 18:30 -abb pcm600: Yes of course
24abb , 18:31 – abb pcm 600: tell me the all three voltage
24abb , 18:32 -abb pcm600: R=63.8
Y=63.03
B=63.35
24abb , 18:32 – abb pcm 600: all is ok
24abb , 18:33 -abb pcm600: Now it is charged at both ends.
24abb , 18:33 -abb pcm600: When i cut our end breaker, then i get only 2 ph voltage
24abb , 18:34 – abb pcm 600: r u seeing in the panel
24abb , 18:35 -abb pcm600: No seeing at pt MB
24abb , 18:35 – abb pcm 600: cut the brekr from remote end chrge from our end
24abb , 18:35 – abb pcm 600: then check
24abb , 18:36 -abb pcm600: Checked
24abb , 18:36 – abb pcm 600: same prblm
24abb , 18:36 -abb pcm600: I get all 3 ph voltage
24abb , 18:36 -abb pcm600: No
24abb , 18:36 – abb pcm 600: ok
24abb , 18:36 -abb pcm600: It is clear
24abb , 18:37 – abb pcm 600: cvt aftr breker or before
24abb , 18:37 -abb pcm600: After
24abb , 18:38 – abb pcm 600: when charge from both end then what about the load
24abb , 18:38 – abb pcm 600: all three load are balance
24abb , 18:38 -abb pcm600: Yes of course
24abb , 18:56 – abb pcm600: Does the problem solved now?
24abb , 19:49 – abb pcm 600″: Check wiring of pt at tb
24abb , 19:49 – abb pcm 600″: Is it loose
24abb , 20:31 -abb pcm600: No
24abb , 20:31 -abb pcm600: Not anymore
24abb , 20:32 -abb pcm600: No
24abb , 20:32 -abb pcm600: It is perfectly connected
24abb , 20:32 – abb pcm600: Wat about pt secondary phase to phase voltage
24abb , 20:32 -abb pcm600: 110 if it is charged at both end
24abb , 20:33 – abb pcm600: Wat about all other phase?
24abb , 20:34 -abb pcm600: All three phase to phase voltage is 110 if the line charged at both ends
24abb , 20:34 -abb pcm600: If i cut my end breaker then i get 2 phase voltage only
24abb , 20:35 -abb pcm600: I am not getting Yph voltage
24abb , 20:35 – abb pcm600: Does the LA in line side shows leakage current?
24abb , 20:36 -abb pcm600: If our side is charged and the other side breaker is off in this case i get all three phase voltage
24abb , 20:37 – abb pcm600: This message was deleted
24abb , 21:46 – abb pcm 600″: Yes check for leakge current in LA
24abb , 21:51 -abb pcm600: Ok
25abb , 13:11 – abb pcm 600″:

https://elec-engg.com/whatsapp-group-for-protection-engineers/


25abb , 13:11 – abb pcm 600″: Does DNP communicate over RS 485
25abb , 13:26 -abb pcm600: Yes, if supported by the relay manufacturer
25abb , 17:08 -abb pcm600: Can any one tell me sir
Motor got tripped on 51n but the all three phase currents are equal,the protection on calculated value of three phase currents internally by the relay .the relay was 7sj66
25abb , 17:08 -abb pcm600: What is causes
IR valu of the motor is good
25abb , 17:11 – abb pcm600: Any one can explain the difference between DNP and Rs 485
25abb , 17:11 – abb pcm 600″: RS 485 is port
25abb , 17:11 – abb pcm 600″: DNP is protocol
25abb , 17:12 – abb pcm 600″: Used in process automation system
25abb , 17:12 – abb pcm600 “: Any one can be explain how to collect ABT meter load survey data through RS 485 port
25abb , 19:30 -abb pcm600: Correct, RS485 RS232 RS422etc is just an standard for serial communication
25abb , 19:30 -abb pcm600: DNP is a protocol which can be communicated over RS232 or RS485 serial port (as rightly answered by Abhishek).

But, I am not sure if DNP3 over RS485 relays can be Daisy Chained which is typical feature of RS485 network. Can someone tell this??
25abb , 19:32 -abb pcm600: DNP can definitely be daisy chained, just use a terminating resistor
25abb , 19:33 -abb pcm600: Ok thanks, so DNP3 outstation address will act like node ID??
How many relays can we drop on a RS485 using DNP3?
25abb , 19:34 -abb pcm600: I mean DNP3 slave address ranges upto 65535
25abb , 19:36 -abb pcm600: The maximum ieds that was successfully daisy chained was 255, however I won’t use anything close to that.
25abb , 19:36 -abb pcm600: Baud??
Network Length??
25abb , 19:39 -abb pcm600: Read through the RS485 standard, all is specified, this is not my area is expertise, but I’ve seen them work over 200m, use a 9600bd 2 wire comms
25abb , 19:47 -abb pcm600: Ok. Thanks
25abb , 20:22 – abb pcm600: With 2 pair, 0.5 twisted shielded pair, proper earthing of spare wires and shield, I used till1400 meter closed loop
26abb , 10:35 – abb pcm 600: any one use kocos artes 440 three phase secondary innection set.
27abb , 17:59 – abb pcm 600″:


Can anybody explain me this
28abb , 10:56 – abb pcm600: Please share detailed explanation of underexcitation Protection
28abb , 17:54 – abb pcm 600″: Please tell me about LBB scheme in 220kV
28abb , 18:18 – abb pcm600: Local Breaker protection scheme basically depends on type of busbar scheme you applied for.
28abb , 18:19 – abb pcm600: What is the type of bus bar scheme used in your 220kV station
28abb , 18:20 – abb pcm600: It is a trip matrix for designing of protection schemes
28abb , 18:21 – abb pcm600: For which type of unit? Is it for generator
28abb , 18:29 – abb pcm600: Class A is for Turbine trip
Class B is for GCB trip
28abb , 18:33 – abb pcm600: Whenever Turbine tripping occurs ..GCB trips consequently..
28abb , 18:40 – abb pcm600: No correlation with generator in this case. It is for transformer.
28abb , 18:43 – abb pcm600: Above transformer is a GT ..
28abb , 18:46 – abb pcm600: Though it is a GT, ptotection group A and Group B is for transformer breaker it self Hv side and LV side(GCB), 86.1 & 86.2
28abb , 18:51 – abb pcm600: GCB doesn’t have HV side CB..
86 means Master tripping …
28abb , 18:53 – abb pcm600: 🤦🏻‍♂️🤦🏻‍♂️
28abb , 18:53 – abb pcm600: Im saying for trafo
28abb , 18:54 – abb pcm600: *GT not GCB
28abb , 18:55 – abb pcm600: Here in trip matrix, Group A & B categorised for master trips only.
28abb , 18:57 – abb pcm600: You mean, GT dont have hv side cb
28abb , 18:58 – abb pcm600: Can you please share such, sld which shows GT side doesnt have hv side cb
28abb , 20:06 – abb pcm600:
Sorry LV side doesn’t have CB I meant to say..if it is 11/33kV GT ..CB will be at 33kV side in small power plants..
28abb , 22:16 – abb pcm600: 👍🏼👍🏼. I got it
29abb , 13:21 – abb pcm 600″: It is transformer
29abb , 14:23 – abb pcm600: For transformer, I have no idea regarding under excitation. We generally use over excitation/flux protection for higher rating transformers.
29abb , 15:09 – abb pcm600: Yes sir, generator only
29abb , 15:40 – abb pcm 600″: No it is transformer
29abb , 15:41 – abb pcm600: Sir actually I asked this yesterday,
29abb , 15:42 – abb pcm600: I want wrt generator
29abb , 15:42 – abb pcm600: For 7UM relay
29abb , 17:43 – abb pcm 600″: Low impedance bubar having main and check zone
29abb , 17:43 – abb pcm 600″: *busbar
29abb , 17:46 – abb pcm 600″: For busbar trip
29abb , 17:49 – abb pcm 600″:
Please tell me how this is working
29abb , 18:46 – abb pcm600: I understood scheme is double busbar with transfer bus scheme.
Main and check zone concept is different from LBB. We use zone system in busbar differential. Whereas, LBB operates when corresponding breaker fails to trip under feeder fault/bay fault condition. LBB will extend to trip concerned busbar of that breaker(two main and transfer scheme) and other end of the line(i. e., opposite end station).
29abb , 18:49 – abb pcm600: You will be more clear with protection schemes, showing LBB operated page.
31abb , 21:07 -abb pcm600: Hii,

Can you please suggest electric safety shoe( composite toe shoe) available online
31abb , 21:09 – abb pcm 600 “: It’s what we are advised to use 👆🏻
01/09/2020, 11:51 – abb pcm 600″: float dc ammeter shows which current?
01/09/2020, 11:51 – abb pcm 600″: In battery charger
01/09/2020, 12:16 – abb pcm600: From DIGSI 5 can we communicate siprotec 4 relay
01/09/2020, 13:17 – abb pcm 600″: No
01/09/2020, 13:18 – abb pcm 600″: But you can install them on single pc
01/09/2020, 13:19 – abb pcm600: OK, thank you
02/09/2020, 11:51 – abb pcm 600:
02/09/2020, 11:51 – abb pcm 600: anyone have drawing for this 11 kv panel
02/09/2020, 11:58 – abb pcm 600: siemens
02/09/2020, 13:36 – abb pcm 600″: I am having tow mfm in different panels both having same voltage and current but KWH is different . Is this possible
02/09/2020, 13:40 – abb pcm600″: Check CTR in both
02/09/2020, 13:40 – abb pcm 600″: Checked it is correct
02/09/2020, 13:44 – abb pcm600: Current may be same now but it might be different in different timings, so results in different kwh ratings.
02/09/2020, 13:44 – abb pcm 600″: Please clarify
02/09/2020, 14:19 – abb pcm600: Load in two feeders could not need to be same all the times. Eventually, results in different kwh rating.
02/09/2020, 14:20 – abb pcm 600″: One is incomer and one is outgoer
02/09/2020, 14:21 – abb pcm600: Only one- one feeder connected in that bus
02/09/2020, 14:21 – abb pcm 600″: No
02/09/2020, 14:22 – abb pcm600: Then how both currents ratings were same
02/09/2020, 14:23 – abb pcm 600″: It is plant of 30mw where incomer is trf and connected to og line
02/09/2020, 14:24 – abb pcm 600″: That incomer is getting input from 6 5MW source s
02/09/2020, 14:43 – abb pcm600: How much is the difference in values in both meters
02/09/2020, 14:51 – abb pcm 600″: 183 and 258
02/09/2020, 14:53 – abb pcm600″: Is meter calibration done
02/09/2020, 14:53 – abb pcm600″: Check PT also
02/09/2020, 16:49 – abb pcm 600″: R-Y 115, Y-B 121 B-R 120
02/09/2020, 16:49 – abb pcm 600″: Current
02/09/2020, 16:49 – abb pcm 600″: No
02/09/2020, 16:49 – abb pcm 600″: Angles
02/09/2020, 19:43 – abb pcm600: In 7SR relay
02/09/2020, 19:50 – abb pcm600: TCS Protection is not there in 7SR17 Relay
02/09/2020, 19:51 – abb pcm600: How to make logic for TCS in 7SR17 Relay
02/09/2020, 19:58 – abb pcm600: This will work only in case of DC coil in VCB
02/09/2020, 20:02 – abb pcm600: OK, but how to make equation for that
02/09/2020, 20:03 – abb pcm600: My existing relay is Rho 5
02/09/2020, 20:05 – abb pcm600: Sorry its Rho3
7SR17_Rho_User_Manual.pdf
02/09/2020, 20:20 – abb pcm600: Thank you
03/09/2020, 15:51 – abb pcm600:
03/09/2020, 15:51 – abb pcm600: In 7SR relay how to make equation
03/09/2020, 15:51 – abb pcm600: Like logic
03/09/2020, 16:00 – abb pcm600:
03/09/2020, 16:01 – abb pcm600: How to make TCS Logic in disp evolution software
03/09/2020, 16:01 – abb pcm600: Please help
03/09/2020, 16:04 – abb pcm 600″: How many trip coils in your breaker
03/09/2020, 16:06 – abb pcm600: Two
03/09/2020, 16:06 – abb pcm 600″: Ok
03/09/2020, 16:07 – abb pcm 600″: Use two equations
03/09/2020, 16:07 – abb pcm600: Yes but please guide
03/09/2020, 16:08 – abb pcm 600″: Assign binary input to 74TCS-1 to 4 in input matrix
03/09/2020, 16:09 – abb pcm 600″: Then assign the same in output matrix by virtual input
03/09/2020, 16:10 – abb pcm 600″: Use E1=V1V2, E2=V3V4
03/09/2020, 16:14 – abb pcm600: 74TCS is not available in relay
03/09/2020, 16:15 – abb pcm 600″: Which relay
03/09/2020, 16:15 – abb pcm600: 7SR17
03/09/2020, 16:51 – abb pcm600: Is it possible to Use TCS in if we don’t have 74TCS
03/09/2020, 16:51 – abb pcm600: ?
03/09/2020, 16:52 – abb pcm600:

Whatsapp +989129613659


03/09/2020, 17:38 -abb pcm600: SEL 311B Manual Operating Password please Share
03/09/2020, 17:49 -abb pcm600: Should be TAIL or OTTER
03/09/2020, 18:23 – abb pcm600: Level 1:OTTER
Level 2: TAIL
03/09/2020, 21:11 – abb pcm600: In CT ,Due to leakage the oil reaches minimum level.In that case how to refill the oil?
Whether we refill directly from top of the CT oresle vacuum pulling thereby bottom filling ?
03/09/2020, 21:32 – abb pcm 600: What can someone recommend as voltage regulator for a 33kv line that experiences voltage fluctuations once there is any loss of any other 33kv feeder all feeding from the same 132kv bus. Meanwhile the one that experiences the voltage dips is not on the 33kv bus.
03/09/2020, 21:38 – abb pcm 600: can we communicate the scheneider relay p442 in micom S1 studio software
03/09/2020, 21:47 – abb pcm 600″: This message was deleted
03/09/2020, 21:48 – abb pcm 600″: Can anyone tell me that when I am injecting 63.5in phase to neutral why I am getting voltages in ph to ph
03/09/2020, 21:56 -abb pcm600: You are injecting in one phase or two phase?
03/09/2020, 21:56 – abb pcm 600″: Only phase to neutral
03/09/2020, 21:56 – abb pcm 600″: Rph only
03/09/2020, 21:58 -abb pcm600: In Y phase also 31V showing
03/09/2020, 22:01 – abb pcm 600″: Not injecting in y phase
03/09/2020, 22:06 -abb pcm600: If injecting in r phase,it should not show in Y and b phase,but it will show in VRY AND VBR.
03/09/2020, 22:07 – abb pcm 600″: Is there neutral problem
03/09/2020, 22:07 -abb pcm600: Try to ground other two phases and check
03/09/2020, 22:08 -abb pcm600: Check with three phase injection also
03/09/2020, 22:08 – abb pcm 600″: Ok
03/09/2020, 22:29 – abb pcm 600: how it solve
03/09/2020, 22:30 – abb pcm 600: during installation of scheneider electric studio

Hello, thank you for visiting our site
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03/09/2020, 22:46 – abb pcm 600: and netframe is not support on this window
04/09/2020, 11:28 – abb pcm 600: how can i download the data model package for scheneider
04/09/2020, 13:18 -abb pcm600: You have Schneider software?
04/09/2020, 13:18 -abb pcm600: You can download through data model manager
04/09/2020, 13:19 – abb pcm 600: server not respond
04/09/2020, 13:21 -abb pcm600: If you need any particular data model, I will check and I sent to you.
04/09/2020, 13:21 – abb pcm 600: ok
04/09/2020, 13:21 – abb pcm 600: P442 distance protection relay all software version
04/09/2020, 13:23 -abb pcm600: I will check in my system, if available I will send,email id?
04/09/2020, 13:40 – abb pcm 600: ok
04/09/2020, 13:40 – abb pcm 600: parmod2356@gmail.com
04/09/2020, 14:06 – abb pcm 600″:
04/09/2020, 14:07 – abb pcm 600″: Plz check data model if have then plz
04/09/2020, 14:56 – abb pcm 600″: I am connecting two power supply in series of 48 V but current of one is 10A and 2 A what will be the resultant
04/09/2020, 14:56 – abb pcm 600″: Current
04/09/2020, 14:57 – abb pcm600: Download data models
04/09/2020, 16:12 – abb pcm600: Current will be added in series
04/09/2020, 17:12 -abb pcm600: Check your email. I sent P442 data models
04/09/2020, 17:23 – abb pcm 600: yes i recieved thank you so much
04/09/2020, 19:12 – abb pcm 600″: server not respond
04/09/2020, 22:01 – abb pcm600: Use Ge Micom S1 Agile
http://www.partners.gegridsolutions.com/Assets/View/1950ba21-8ace-4079-9330-35d8d5df2e55
05/09/2020, 13:56 – abb pcm600: How to make Close circuit supervision configuration in 7SR Relay
05/09/2020, 17:12 – abb pcm 600″: earth resistance value without grid must be less than 5 ohm
05/09/2020, 17:12 – abb pcm 600″: Is it correct
05/09/2020, 17:17 -abb pcm600: It depends upon soil,for some soil should be less than 1 ohm
05/09/2020, 17:47 – abb pcm600: hmmm
05/09/2020, 18:36 – abb pcm600:
05/09/2020, 18:36 – abb pcm600: What’s the meaning the meaning of 4 temperature inputs
05/09/2020, 18:37 – abb pcm600″: May be for RTD connections
05/09/2020, 18:38 – abb pcm 600 “: Yeah.. For bearings, stator and rotor
05/09/2020, 19:00 – abb pcm600: What is the application of RTD
05/09/2020, 19:00 – abb pcm 600 “: Monitoring the temperature
05/09/2020, 19:00 – abb pcm600: Ok
05/09/2020, 19:00 – abb pcm 600 “: Resistance temperature detector
05/09/2020, 19:01 – abb pcm 600 “: The resistance changes with respect to the temperature
05/09/2020, 20:03 – abb pcm600: Do we need any configuration in 7SR relay for RTD
05/09/2020, 20:30 – abb pcm 600 “: I haven’t worked on 7sr but RTDs need configuration
05/09/2020, 20:32 – abb pcm600: Dears

https://elec-engg.com/whatsapp-group-for-protection-engineers/

08/09/2020, 09:54 – Fatima added A1 5414
08/09/2020, 12:11 – abb pcm 600″: How to test low impedance ref
08/09/2020, 12:11 – abb pcm 600″: Can anyone tell me
09/09/2020, 11:35 – abb pcm 600″: Can anyone please share testing procedure for line differential relay
09/09/2020, 11:35 – abb pcm 600″: Siemens 7sd522
09/09/2020, 11:36 – abb pcm 600″: It was there in this group but it was deleted in my phone number please share it again
09/09/2020, 11:47 – abb pcm 600″: Thank you
09/09/2020, 12:13 abb pcm600: Thanks
09/09/2020, 14:26 – abb pcm600: Any body have testing format for REM 615. Like overcurrent, earth fault, thermal overload, phase reversal, negative sequence overcurrent protection for motor, motor load jam protection and motor start up supervision .
09/09/2020, 14:26 – abb pcm600: Please share it
09/09/2020, 22:43 – abb pcm 600″: This message was deleted
09/09/2020, 22:43 – abb pcm 600″: Siemens 7SA522
09/09/2020, 22:44 – abb pcm 600″: Testing procedure of 7SA522 if anyone has please share it
Which relay to set directional
10/09/2020, 16:38 – abb pcm600:
Any 1 have Omicrom PTL file for ERL L-Pro 4000
10/09/2020, 16:39 – abb pcm600: Mail me please
10/09/2020, 20:26 – abb pcm600: Does anyone have a SIPROTEC 5 .sim file to share?
12/09/2020, 10:25 – abb pcm 600″: Single phase pick up and three phase pickup will be different for overcurrent
12/09/2020, 10:25 – abb pcm 600″: Protection in relay
12/09/2020, 10:26 – abb pcm 600″: Or not
12/09/2020, 11:00 -abb pcm600: In which relay?
12/09/2020, 11:09 – abb pcm 600″: 7SJ64
12/09/2020, 11:10 – abb pcm 600″: Idmt time at normal setting and 2 times current injection are coming same is this possible
12/09/2020, 11:41 -abb pcm600: At normal setting relay will pick up only.
12/09/2020, 11:41 -abb pcm600: Check the output trip logic
13/09/2020, 11:59 – abb pcm 600: Can I ask mechanical engineering related questions here or can someone please link me to a group where I can ask questions related to mechanical engineering?
15/09/2020, 16:21 – abb pcm 600: please share any test docs for csc162 sifang dpr relay
16/09/2020, 09:26 -abb pcm600: What indicates I2/I1 fault in ABB REJ 601 relay, on what condition it activates.
16/09/2020, 15:16 – abb pcm 600″: Can anyone clarify me LBB scheme 220kV
16/09/2020, 16:09 -abb pcm600: Can earthing of CT 2ndry neutral both side (at panel side and at field side) can cause this differential current ??
16/09/2020, 16:09 -abb pcm600: Does anyone have experienced this case ?

That a transformer differential relay tripped even when breaker is opened. ??

Some differential current flowing when breaker is openend
16/09/2020, 18:22 – abb pcm 600″: Always do single.point earthing
16/09/2020, 18:24 -abb pcm600: 👍👍
16/09/2020, 22:19 – abb pcm600′: In this case the current doesn’t flow in relay coil…it will circulate if both field side and panel side star point earthed
16/09/2020, 22:20 – abb pcm600′: Check DR…
16/09/2020, 22:21 – abb pcm600′: Hope it’s not triped with diff
17/09/2020, 06:13 – abb pcm 600: if transformer trip on diff. relay on through fault whats the reason.
CamScanner 09-17-2020 02.04.59.pdf
17/09/2020, 07:31 -abb pcm600: Check differential settings and harmonic blocking during energization
17/09/2020, 07:45 – abb pcm 600: ok
17/09/2020, 10:25 – abb pcm 600: can we disable external fault trip in micom p642 diff.
19/09/2020, 11:30 – abb pcm 600:
Dear house I still need support from mechanical engineers,after running the generator for 3hrs the turbine guide bearing temperature would rose from 50-62 and if the machine is not shutdown it will continue to alarm and trip point.
19/09/2020, 11:34 – abb pcm 600: Our plant has 6 generators of 96.4mw each,sundenly one of them developed high temperature issue from the turbine guide bearing. It is a hydro power plant
19/09/2020, 15:02 – abb pcm600: Increase the bearing temperature limit upto 85 degree
19/09/2020, 15:02 – abb pcm600: Set point
19/09/2020, 15:24 – abb pcm 600: Won’t that cause bearing burn out as all other generators doesn’t get up 58 degrees?
19/09/2020, 15:24 – abb pcm 600:
19/09/2020, 17:23 -abb pcm600″: What about the oil temperature in that system?
19/09/2020, 17:25 -abb pcm600″: If the oil temp is high, too the bearing temp will be high. So you need to inspect cooling systems for turbine oil.
19/09/2020, 17:32 – abb pcm 600: The oil temperature also do rise but as usual it should be lagging and that is what we are getting
19/09/2020, 17:35 -abb pcm600″: If you are using water in a cooling system, just inspect the water entry. Especially valves which allow cooling water to circulate.
19/09/2020, 17:42 – abb pcm 600: It’s self cooling, when the shaft rotates it stir up oil in between the gap between it and the bearing providing lubrication and cooling at the same time
19/09/2020, 17:48 -abb pcm600″: I know that. What I am saying is that for bearing to be at low temperature, the oil in its gap must be at low temperature too. But the oil is cooled by either air, or cold water system. So I am advising you to inspect cold water system or air system. Because this shows that the system that cools oil is not working properly.
19/09/2020, 17:59 – abb pcm 600: Ok sir,our system is an enclosed type,no water cooling system,and we checked all the breeder points but no issues.
19/09/2020, 18:00 -abb pcm600″: Ok continues to troubleshoot bro.
19/09/2020, 18:13 – abb pcm 600: Thanks so much
20/09/2020, 18:29 – abb pcm600: What’s is the use of IEC Station DIGSI 4
21/09/2020, 12:34 -abb pcm600: Could anyone pls share the Toshiba Relay documents
21/09/2020, 12:35 – abb pcm 600: which relay model
21/09/2020, 12:35 -abb pcm600: Will let u know..
21/09/2020, 12:36 -abb pcm600: How to communicate the relay.. Or wat documents available could u pls share it.. Thanks
21/09/2020, 12:36 – abb pcm 600: for which relay model
21/09/2020, 12:36 – abb pcm 600: particular model
21/09/2020, 12:36 – abb pcm 600: ?
21/09/2020, 12:37 -abb pcm600: 5 min
21/09/2020, 12:37 -abb pcm600: Will come back
21/09/2020, 12:37 – abb pcm 600: ok
21/09/2020, 12:56 – abb pcm 600: can be communicate with RSM100 SOFTWARE
21/09/2020, 13:16 -abb pcm600: 👍
21/09/2020, 21:07 – abb pcm 600: Hi guys….Any one have p543 test report format & test procedure kindly share me
22/09/2020, 01:20 – abb pcm600: Hello, how to check if fiber optic between two relays is a healthy connection
22/09/2020, 01:21 – abb pcm600: Siprotec 5
22/09/2020, 11:16 -abb pcm600: Anybody service provider near bagalkot karnataka.
Like : TL, T/f , ht Panel relay breaker, cables
22/09/2020, 18:00 – abb pcm600: How to make possible for these two devices to communicate, they are connected using optic duplex LC
22/09/2020, 18:26 -abb pcm600: anyone has 7SJ85 test procedure please?
22/09/2020, 18:43 -abb pcm 600 “: do you mean communicate as a protection interface for line diff 87L?
22/09/2020, 18:43 – abb pcm600: yes
22/09/2020, 21:54 -abb pcm600″: Check device id
23/09/2020, 11:36 – abb pcm600: Any body having ABB connectivity packages. ?
23/09/2020, 11:37 – abb pcm600: For witch device
23/09/2020, 11:37 – abb pcm600: REF615, REU615
23/09/2020, 14:51 – abb pcm600: I need help in alstom scada any one person
23/09/2020, 15:24 – abb pcm600: Any issues
23/09/2020, 15:47 – abb pcm 600″: This message was deleted
23/09/2020, 15:48 – abb pcm 600″: Use pcm600 available at ABB site. For all relion(RE) series
23/09/2020, 15:50 – abb pcm600: From ABB server(update manager) is very slow to download the connectivity packages.
23/09/2020, 15:54 – abb pcm 600″: https://search.abb.com/library/Download.aspx?DocumentID=ABB_IED_Connectivity_Package_REU615_Ver._5.1.8.msi&LanguageCode=en&DocumentPartId=&Action=Launch
23/09/2020, 15:54 – abb pcm 600″: For REU615
https://search.abb.com/library/Download.aspx?DocumentID=ABB_IED_Connectivity_Package_REF615_Ver._5.1.8.msi&LanguageCode=en&DocumentPartId=&Action=Launch
23/09/2020, 15:55 – abb pcm 600″: For REF615
23/09/2020, 15:55 – abb pcm600: Tqvm
23/09/2020, 16:08 -abb pcm 600 “:


23/09/2020, 16:09 -abb pcm 600 “: anyone, please help me to solve this
23/09/2020, 16:15 – abb pcm 600″: It’s an old package. Temporarily change your system date to 20/5/19
23/09/2020, 16:50 – abb pcm600: Can i call you
26/09/2020, 12:01 – abb pcm 600″: Can anyone tell me how to test low impedance ref
26/09/2020, 18:50 -abb pcm600: Secondary injections or stability?
26/09/2020, 21:17 – abb pcm 600″: Secondary injection
26/09/2020, 21:18 -abb pcm600: I can email you a test procedure, are you using cmc
26/09/2020, 21:18 – abb pcm 600″: Yes
26/09/2020, 21:19 – abb pcm 600″: Mail me at ar48303@gmail.com
26/09/2020, 21:46 – abb pcm 600″: This message was deleted
26/09/2020, 21:46 – abb pcm 600″: Thanks
28/09/2020, 19:19 -abb pcm600: Anybody facing this issue
28/09/2020, 19:25 -abb pcm600: Anyone having 7SD522 SAS CONFIGURED PROJECT FILE?
28/09/2020, 19:26 -abb pcm600: I am facing problem for distance signals
28/09/2020, 19:26 – abb pcm600″: Hi anyone havi short circuit calculation data
29/09/2020, 09:08 – abb pcm 600″: Configure in extended system interface
29/09/2020, 09:08 – abb pcm 600″: You will get the signals which you require
29/09/2020, 10:45 -abb pcm600: If you have sas configured project file.share with me to my email sampathgreen@gmail.com
01/10/2020, 07:27 – abb pcm600: Need to apply 1500V DC voltage for testing.
Have anyone came through 1500V DC voltage injector kit.
01/10/2020, 16:34 – abb pcm 600″: In 220kV scheme with two main and one transfer bus does the logic inputs of TBC and Bus coupler are fed to that bay relay or not
01/10/2020, 16:34 – abb pcm 600″: Or using Goose it is done can anyone tell me
01/10/2020, 16:42 – abb pcm 600″: This message was deleted
01/10/2020, 16:42 – abb pcm 600″: Does anybody have GE relay engineer no.
01/10/2020, 19:44 – abb pcm600: If I am understanding correctly , I would say yes you would get that signals wired to your bay relay as inputs then if needed send it via GOOSE to any other relay that needs it for its logic.
01/10/2020, 21:03 – abb pcm600′: Only during maintenance you shift to tranfer bus through 89T…so bus bar protection should not Operate for tranfer bus…For bay units only bus isolators status ( 89A&89B) should be given. It should operate for Bus-A and Bus-B fault
03/10/2020, 14:09 – abb pcm 600 “:
04 MiCOM P442 Line Distance – Emad Wagih.pdf
03/10/2020, 16:11 – abb pcm 600: Like notes any available for other differential & busbar relays
03/10/2020, 16:21 – abb pcm 600″: 🙏🏻🙏🏻🙏🏻🙏🏻
03/10/2020, 17:54 -abb pcm600: Shukran Ya Handsa
04/10/2020, 08:26 -abb pcm600: Very very useful thanks
04/10/2020, 11:57 – abb pcm 600″: For directional earthfault relay uses positive sequetor negative or zero
04/10/2020, 11:57 – abb pcm 600″: sequence 04/10/2020, 11:58 – abb pcm600: Generally we negative and zero sequence not positive sequence 04/10/2020, 11:58 – abb pcm 600″: Oo 04/10/2020, 11:58 – abb pcm 600″: Ok 04/10/2020, 12:00 – abb pcm 600″: 04/10/2020, 12:00 – abb pcm 600″: Relay is showing neagative power instead of positive 04/10/2020, 12:07 – abb pcm600: In this case current is lagging voltage 04/10/2020, 12:08 – abb pcm 600″: How, it is leading 04/10/2020, 12:08 – abb pcm 600″: As PF is negative 04/10/2020, 12:08 – abb pcm 600″: In capacitive load current leads voltage 04/10/2020, 12:09 – abb pcm 600″: In inductive load cuurent lags voltage 04/10/2020, 12:09 – abb pcm 600″: Current
04/10/2020, 12:09 – abb pcm 600″: Our is inductive load
04/10/2020, 12:43 – abb pcm600: I guess real power is flowing in reverse direction.
04/10/2020, 12:49 -abb pcm600: You have to reverse the CT staring
04/10/2020, 14:09 -abb pcm600: U have to change the pq direction in Siemens bcu
04/10/2020, 19:08 -abb pcm600: Agree 👍🏻
04/10/2020, 23:47 – abb pcm 600 “:
02 P543 Line Differential – Emad Wagih.pdf
06/10/2020, 03:56 – abb pcm 600 “:
09 P442 Directional Earth Fault – Emad Wagih.pdf
06/10/2020, 04:12 – abb pcm 600 “:
OCR-153-r0.doc

Whatsapp +989129613659


06/10/2020, 07:13 -abb pcm600: -20201006-WA0001 (file attached)
06/10/2020, 15:05 – abb pcm600: Great work and content it will be beneficial for entry level engineers like me
06/10/2020, 15:07 – abb pcm600: Great fantastic work
06/10/2020, 15:08 – abb pcm600: If you have calculations for differential relay for transformer 132/33 , 132/33/11 Kv, can provide us with my regard
07/10/2020, 13:37 – abb pcm 600 “:
09 P442 Directional Earth Fault – Emad Wagih.pdf
07/10/2020, 13:40 – abb pcm 600 “:
08 ABB RED 670 Line Differential – Emad Wagih.pdf
07/10/2020, 13:42 – abb pcm600″: Directional over current (67)please
07/10/2020, 14:59 – abb pcm600: Eppadi irukkae
07/10/2020, 16:29 – abb pcm600: Possible to upload as pdf
07/10/2020, 16:51 – abb pcm 600 “: H
07/10/2020, 16:51 – abb pcm 600 “:


OCR-153-r0.pdf
07/10/2020, 17:20 – abb pcm600: There are interference between drawing possible to amended and reupload
08/10/2020, 01:01 – abb pcm 600 “: I’ll try to convert it from my pc
08/10/2020, 01:02 – abb pcm 600″:
08/10/2020, 01:02 – abb pcm 600″: Relay is not time synced
10/10/2020, 09:13 -abb pcm600: What is SPS scheme used in Power station?
13/10/2020, 09:55 – abb pcm 600: plz. share me z graph micom software.
13/10/2020, 16:32 – abb pcm 600: in micom p442 relay how R1,R2,R3,R4 PP and PG CALCULATE
13/10/2020, 18:16 – abb pcm 600″: How-to measure resistivity of water
13/10/2020, 18:16 -abb pcm600 “:
Flash Report__Mumbai_Blckout_12_10_2020.pdf
14/10/2020, 08:26 – abb pcm 600″: Trafo is getting tripped at night in trafodifferntial
14/10/2020, 08:26 – abb pcm 600″: Even though there is no current in night why it is tripping on differential
14/10/2020, 09:17 – abb pcm 600″:
Can anybody tell me how to read this
14/10/2020, 10:57 -abb pcm600: Can you send complete DR for diff fault to my email sampathgreen@gmail.com
14/10/2020, 16:09 – abb pcm 600″: I am testing a mfm em6400
14/10/2020, 16:09 – abb pcm 600″: I want to change power factor
14/10/2020, 16:09 – abb pcm 600″: From lag to lead
14/10/2020, 16:09 – abb pcm 600″: Using single phase is it possible
14/10/2020, 16:15 – abb pcm 600″: Only positive and negative is changing in inductive
14/10/2020, 17:41 – abb pcm 600: anybody tell me how set the R1,R2,R3 and R4 P-P and P-G in micom p442 its very urgent
14/10/2020, 17:42 -abb pcm600: Which relay ?

Can you send fault data ? And DR
14/10/2020, 23:16 -abb pcm600″: Helow guys, who can help me how to measure the earth resistance using ground clamp meter.
15/10/2020, 16:06 -abb pcm600: Anybody have
Abb vd4 (vcb medium voltage) technical manual
Required Trip,close coil, etc details
16/10/2020, 21:41 – Fatima: Protection Relay Discussion Group in Telegram

https://t.me/joinchat/Cmyg2FiXX-qlTYqyXQ_pjg
16/10/2020, 21:52 -abb pcm600: Friends I have a doubt tat, what is phase over current, and over current in relays
17/10/2020, 17:15 – abb pcm 600″: Can anyone tell me what is Sf in earthing calculation
17/10/2020, 18:31 – abb pcm600: As I referred, it is the diversion factor for which fault is being distributed across the ground network through transmission line ground wires.
17/10/2020, 18:31 – abb pcm600: please share, your understanding from your reference.
17/10/2020, 19:15 – abb pcm 600″: Ratio of Ig/ 3Io
17/10/2020, 20:03 – abb pcm600: Not by an equation, pls explain in practical understanding.
17/10/2020, 20:03 – abb pcm600: Anyone pls
17/10/2020, 20:27 – abb pcm 600″: I am also not able to understand this formula
19/10/2020, 17:21 – abb pcm 600″: MTA is -15deg, rca is +- 90
19/10/2020, 17:21 – abb pcm 600″: Then angle will be 60-0-240
19/10/2020, 17:22 – abb pcm 600″: For earthfault
19/10/2020, 17:23 -abb pcm600: 75 0 255
19/10/2020, 17:29 – abb pcm 600″: Ok
20/10/2020, 14:11 – abb pcm 600:
20/10/2020, 14:11 – abb pcm 600: anyone having a manual for this relay
20/10/2020, 14:11 – abb pcm 600: plz. share
20/10/2020, 14:15 – abb pcm600:
ConAegis Reference Manual.pdf
20/10/2020, 14:15 – abb pcm600:
options.xml
20/10/2020, 14:16 – abb pcm 600: also share communication software
20/10/2020, 14:19 – abb pcm600:
ConAegis_v4.8.0.exe
20/10/2020, 14:19 – abb pcm 600: thanks
20/10/2020, 20:57 – abb pcm 600: have anyone use kocos artes kit for test distance protection relay
21/10/2020, 18:36 -abb pcm600:
How much the knee point voltage of nct
21/10/2020, 18:51 – abb pcm600: Vkp = K * If/CTR * (RCT + RL + RR)
21/10/2020, 18:51 – abb pcm600: Vkp is the knee point voltage
21/10/2020, 18:51 – abb pcm600: K constant taken as 2
21/10/2020, 18:52 – abb pcm600: If – max. Fault current
21/10/2020, 18:52 -abb pcm600:
21/10/2020, 18:52 – abb pcm600: CTR is the CT ratio
21/10/2020, 18:53 – abb pcm600: Rct CT winding resistance
21/10/2020, 18:53 – abb pcm600: RL loop lead resistance in ohms
21/10/2020, 18:53 -abb pcm600: Thank you
21/10/2020, 18:53 – abb pcm600: RR relay burden
21/10/2020, 18:55 – abb pcm600: Or do knee point voltage test
21/10/2020, 18:55 -abb pcm600: What mean by 40Rct+400v in ct details
21/10/2020, 19:10 – abb pcm600:
21/10/2020, 19:34 – abb pcm600: <=40 ohm winding resistance 400v knee point voltage < 30mA at 100 volt while knee point test 21/10/2020, 19:35 – abb pcm600:
21/10/2020, 19:35 – abb pcm600:
21/10/2020, 20:22 – abb pcm 600 “:
2_5222447363104180662.pdf
22/10/2020, 09:46 – abb pcm 600: any contact no. of CGI RELAY
22/10/2020, 12:01 – abb pcm 600:
Greetings house,up till now our problem of guide bearing temperature rise has not been resolved. This sketch is my observation when the generator is operation but I’m not a mechanical engineer.
22/10/2020, 12:02 – abb pcm 600: Other generators doesn’t behave this way
22/10/2020, 20:07 – abb pcm600: How to test under Impedence
22/10/2020, 20:09 – abb pcm600: Setting is 0.02 P. U
22/10/2020, 20:32 – abb pcm600: Relay is REM545
26/10/2020, 13:56 – abb pcm 600: how to test micom p442 distance protection relay as well as setting.
27/10/2020, 18:31 – abb pcm 600″:
In transfer bus how the sequence of operation will be performed
28/10/2020, 08:47 – abb pcm 600: what is cause of tripping of incomer due to outgoing feeder trip on high set earth fault.
28/10/2020, 19:22 – abb pcm600: How to test pole slip
28/10/2020, 19:24 – abb pcm600: If anybody has some written material please share
30/10/2020, 18:19 – abb pcm600: Hallo everyone, Does someone have a standard calculation how many percent Current fault setting from Current nominal?, for Normaly invers and definite Time
30/10/2020, 18:30 – abb pcm600: For overcurrent protection
01/11/2020, 11:09 – abb pcm600: On Which side CT low forward power protection and reverse power Protection is generally there
01/11/2020, 11:10 – abb pcm600: Neutral side CT or Phase side CT
01/11/2020, 12:25 – abb pcm600:
01/11/2020, 12:25 – abb pcm600: What’s the meaning four step in this protection
01/11/2020, 17:02 -abb pcm600 “: Four steps means four different stages
01/11/2020, 17:02 -abb pcm600 “: 4 different level of NPS you can configure
05/11/2020, 17:04 – abb pcm 600″: Which version of digsi is compatible for window 8 ???
11/11/2020, 09:01 – abb pcm600: One problem we are facing that with stator earth intertern trip is also coming
Wiring checked what may be other problem
12/11/2020, 16:49 – abb pcm600: URGENT Requirement of Commissioning Engineers PLCC/SAS/Protection. – PAN India
Kindly share this information with yours friends and relatives it would help us in receiving the most relevant candidates for Job.
12/11/2020, 17:03 – abb pcm600:
12/11/2020, 17:03 – abb pcm600: Hi, can anyone help
12/11/2020, 17:04 – abb pcm600: I cant change the comm mode to RSTP
Updated the firmware to P14231QB….B60L.
12/11/2020, 18:02 – abb pcm600: Can anyone help please?
13/11/2020, 10:11 – abb pcm600:
13/11/2020, 10:11 – abb pcm600: How enter in setting mide
13/11/2020, 10:12 – abb pcm600: Setting mode
13/11/2020, 10:25 – abb pcm600: Anybody please help
13/11/2020, 10:25 – abb pcm600: I am in trouble
13/11/2020, 10:39 -abb pcm600: What do you want to do in settings?
13/11/2020, 10:44 – abb pcm600: To view setting only
13/11/2020, 10:44 – abb pcm600: And to check measurements
13/11/2020, 10:44 -abb pcm600: Press down arrow
13/11/2020, 10:44 -abb pcm600: System data will come
13/11/2020, 10:44 -abb pcm600: Then press right now
13/11/2020, 10:45 -abb pcm600: You will find measurements, configuration, settings
13/11/2020, 10:46 – abb pcm600: I found these now
13/11/2020, 10:46 – abb pcm600: But I am not able to enter to any option
13/11/2020, 10:47 -abb pcm600: If you founds measurements, you have to press down arrow
13/11/2020, 10:48 – abb pcm600: Yea i am pressing but nothing is happening
13/11/2020, 10:49 – abb pcm600:
13/11/2020, 10:51 -abb pcm600: You have to reset the trip and alarm,then you try
13/11/2020, 10:51 – abb pcm600: How to do this sir
13/11/2020, 10:52 -abb pcm600: Press the book 📖 symbol
13/11/2020, 10:52 -abb pcm600: It will show all Alarms,then press c
13/11/2020, 10:53 – abb pcm600: I am pressing book key but nothing is happening
13/11/2020, 10:54 – abb pcm600: How come out of this menu
13/11/2020, 10:55 -abb pcm600: Press c
13/11/2020, 10:58 – abb pcm600: Nothing is happening by pressing c key also

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13/11/2020, 10:58 – abb pcm600″: Can u send the photo
13/11/2020, 10:59 – abb pcm600:
13/11/2020, 11:00 -abb pcm600: Troubleshooting or testing?
13/11/2020, 11:01 – abb pcm600: Testing
13/11/2020, 11:01 – abb pcm600″: While pressing c any password is asking?
13/11/2020, 11:01 – abb pcm600: Nothing
13/11/2020, 11:03 – abb pcm600″: Once u can restart nd do the same
13/11/2020, 11:04 – abb pcm600: Sir how to restart
13/11/2020, 11:05 -abb pcm600: You have to switch off the relay,wait for some time then switch on.
13/11/2020, 12:24 – abb pcm600: Ok
13/11/2020, 12:25 – abb pcm600: But working
13/11/2020, 12:25 – abb pcm600: Not working
13/11/2020, 20:48 – abb pcm600:
13/11/2020, 20:48 – abb pcm600: What’s the meaning of I/I in the setting
13/11/2020, 20:49 – abb pcm600:
13/11/2020, 20:49 – abb pcm600: What’s the meaning I/In in this
13/11/2020, 21:11 – abb pcm600: Any body please suggest
06/12/2020, 10:00 – abb pcm600: https://youtu.be/7Dq88HMoub4
07/12/2020, 13:14 -abb pcm600″: Freelance relay engineer wanted. RET670 relay testing, configuration and retro fitting in Chennai.
If anyone interested let me know.
8/12/2020, 21:19 – abb pcm 600″: How compensation factor is used in distance relay
07/12/2020, 21:19 – abb pcm 600″: Can anyone tell me this
08/12/2020, 12:01 – abb pcm 600″: When I change the star point then does protection operate or not
08/12/2020, 12:01 – abb pcm 600″: In case of non directional overcurrent
08/12/2020, 12:03 – abb pcm 600″: Relay is showing power in neagtive
08/12/2020, 12:03 – abb pcm 600″: So I want to change the polarity
08/12/2020, 12:59 -abb pcm600: It will operate
08/12/2020, 13:00 – abb pcm 600″: In directional it will not
08/12/2020, 13:02 -abb pcm600: Depending each direction (reverser or forward ) starpoint to consider
08/12/2020, 13:16 – abb pcm 600″: I have set as forward
08/12/2020, 13:17 – abb pcm 600″: This message was deleted
08/12/2020, 13:17 – abb pcm 600″: P1 is bus side and P2 is line side
08/12/2020, 13:19 – abb pcm 600″: With S1 as star point
08/12/2020, 13:37 -abb pcm600:
08/12/2020, 13:38 – abb pcm 600″: Ok
08/12/2020, 14:03 – abb pcm 600″: When I am shorting the TB for changing the meter the current is still not zero
08/12/2020, 14:03 – abb pcm 600″: It is showing as 5A
08/12/2020, 14:03 – abb pcm 600″: Actual load current is 64A
08/12/2020, 14:03 – abb pcm 600″: After shorting it is showing as 5A not 0
09/12/2020, 14:09 -abb pcm600: Please Share 7UM6211 Test Report
12/12/2020, 16:57 – abb pcm600: Anybody if has CTNM31 Manual please share
14/12/2020, 18:35 – abb pcm 600″:
14/12/2020, 18:35 – abb pcm 600″: Is this a balanced phase
14/12/2020, 18:35 – abb pcm 600″: Or Y and B interchanged
14/12/2020, 18:37 -abb pcm600: Yes the rotation is clock wise
14/12/2020, 18:37 – abb pcm 600″: According to me it is ACB phase sequence
14/12/2020, 18:37 – abb pcm 600″: Ok
14/12/2020, 18:38 – abb pcm 600″: So Y and B needs to be interchanged
15/12/2020, 16:25 -abb pcm600 “: Gents
Am asking if anyone in here knows how to run two generators in parallel and kindly assist with the schematic diagram
15/12/2020, 16:26 -abb pcm600 “: I have two generators

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protection relay 2 Discussion

– During one phase PT failure, will overflux relay work? Has anyone seen this kind of voltage transformer connection?
– Why b phase winding is grounded on the secondary side?
– Can u share nameplate details of the PT
– yes, in an oil company, usually they only use 2 PT input and make it as delta connection in the relay
– That’s an open delta voltage transformer (or potential transformer)
– It’s mainly used as an input to detect earth faults using neutral voltage displacement.
– Typically the sum of the voltage across D7 and D9 is zero ….however should there be an earth fault and one of the phases hit the ground … you will get voltage across the open point
– Such schemes are used in ungrounded systems or on generator – transformer sets …. there is no path for earth fault
– Sorry open wye … but the scheme is the same …
– Open delta connection, Yellow phase normally will ground.

But as per the drawing seen some conflict.
Normally 2 VT Winding we can see.


– This is a star connection with y phase grounded. Not an open delta. I was reading on the internet it’s some old practice followed in the UK.

– Anyone has any experience with diesel Genset paralleling on the common neutral resistor
– Any drawing, and what you wanna know about?
– How many generators can work connected to the resistor and how many can work isolated in parallel mode. That’s a very big open question.
– Yes, it is really problematic to solve its protection system
– Yes we typically run the neutrals to a common neutral bar. Install at least 3 the neutral earthing resistor and contactors
– Are you talking about medium voltage generators
– Yeah.
– How did you calculate the size of resistors
– Please, can you share some calculations?
– I need a setting guide for directional protection
– If any example for Double feed SubStation with the tiebreaker normally closed
– What is the Apts scheme?

– For this system, with the two Transformers secondary breakers and the tiebreaker are normally closed, and installing directional on the two secondaries, I need some guidance on how to make the setting for the directional, And if anyone has a similar case I will be glad if he shares his settings and how to Make them?
– the intention of the Directional on the secondary side is for backup protection? I ever encounter an application that uses the secondary side 67 as a backup by looking up into the transformer and if it operates it will trip both HV and LV. – Can anybody share about the zig-zag transformer? Principle operation of it.

– Anyone has SR 469, SR 650, and SR 750 test formats? Which is the software used for these relays? Anyone pls help.

– what could be the cause of the SF alarm?
– PLC is communicating with another PLC over Profibus
– Well, it can be a lot of stuff, but the first thing I always have for this alarm. SISTEM FAULT means that you may have some unit programmed inside your PLC that is not connected in the field.
– So if it still works let it be
– with that alarm all parameters of slave address become red
– This is not something to concern, just be sure you have a good backup of the PLC program. but if it remains, it will not let startup of Engine
– Yes, but if it is already working, maybe is only a module programmed in the PLC but not connected in the field, but I say, I saw processes going on for Years with this SF, and nothing ever happened.

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– we have a problem in the Genetaror Micom P343 that does not boot, please help us how to fix it, thanks
– Check the ribbon resistance of hmi to relay. We have faced the same and ask Alstom ..then after they checked and replace the ribbon, and fix the issue.
– Where is the ribbon?
– Open the front side of the relay then there is a connecting ribbon cable u can find
– This, not Bad contact Ribbon the message is clear (Micom Booting) with Led Alarm lightning in red Fast…
It’s like PC booting, I think it’s a microprocessor issue
– We have faced the same problem in our reliance industries Jamnagar plant and Alstom itself give us a solution and change all the ribbons. Micom rebooting issue may be from the HMI problem/relay power card problem but if it comes even after replacing HMI look forward with manufacturers. It’s not just like pc booting issues. There is no chance of error in relay or bugs like a microprocessor.
– I might be wrong but I share what I experienced with the same problem.
– Any vacancy for Facilities Manager
– How do I determine distance characteristic in the L90 GE relay
– do someone has a commissioning manual for L90 relays

– hello good morning everyone, will any of you have high voltage protection information?

– I want to know what you guys as an Electrical Department are doing to fight COVID 19 in their workplace.
– 132kv circuit tripped showing R Y B phase and zone 1. And the same circuit is energized from another end at no load. Also, no-fault found on the circuit during patrolling. What will be the fault? Distance Relay type micom P 441. It could be transient or pic up fault
– Does it show any distance in zone 1?
– Grid staff is not too efficient to check the fault recorder. I will go to check it tomorrow and will discuss it again
– What is the status now does the line charged from both ends?
– Only from another end at no load
– Sir but usually these transients will be blocked by numerical relays rights
– I think it may be DC grounding
– Check the fault recorded to see the fault current and voltage
– Lighting
– Depending on the magnitude and relay Makes. We have had similar invent without any trace to a physical cause
-can you share us the Comtrade file

– What is the standard setting of the characteristic angle for directional overcurrent phase and ground (67/67N)?
– does somebody has this relay technical manual ABB PCD for recloser

-Hi anyone has a static VAR compensator (SVC) protection scheme that can share?
– What is the standard setting of the characteristic angle for directional overcurrent phase and ground (67/67N)?
– For typical distribution networks (up to 33 kV), I set it to 30 degrees. For sub-transmission/transmission, I set it to 45 degrees, between the current phase and voltage polarizing quantity.
– However different scenarios may require different angles … and have to be worked out.
– This angle for directional phase overcurrent? What about the angle for directional ground overcurrent 67N?
– Are there any references for how to Make the setting for directional phase and ground overcurrent 67/67N?
– I would typically read the relay manual, And use the default recommended value. The actual math behind setting them can be very tricky.
– Which relay are you using?
– Sepam s40
– The application is two parallel Transformers
– What’s the voltage level and how far is the relay from the supply transformer?
– From experience, RCA is 20~40
– For 67N, the value is dependent on the type of grounding. Please refer to NPAG, it was clearly explained there
– Anyone has a digsi4 Activation Key? And for 67, if I am not mistaken, RCA is set based on the impedance angle of the system

– Anyone tested Transformer DIFFERENTIAL 7SR242 DUOBIAS. I have some doubt on bias characteristics..!
– This is the complete manual, but the bias equation is not clear on it..!
– Does anyone here got any information about ct accuracy class 0.1 PL 270 R6
– I want to know knee point voltage and resistance


– Install Studio Enterprise this is combination of all scada & it will work as per your lisencing

-Does anybody here has experience with Toshiba relay GRL 200?
– I want to ask about the IO config
– Why don’t you Let admin look into it27etap, 09:16 – abb pcm600″: Please send me any study material regarding AVR
– For a substation
– Little emergency for my undergraduate project
– I can send you the datasheet of Engine AVR
– ABB Unitrol 1000

– I have to change CT/VT ratio in an Elster A1800 energy meter. Already got established communication with the meter via Metercat 3.5 software. I believe CT/VT ratios can be changed via function “Program” but I am not able to proceed as everything at the “Program” popup window is grey (not editable), I request you to support me in changing the CT/VT ratios.
– You have to enable changing xt ratio on parameters function

– There is no Parameter menu in Functions? please clarify in details or send some snapshot
– Hi Guys, I have a question for 220KV level, which is suitable either CVT or IVT(PT)? And why Usually we are adopting IVT(PT) in Andhra Pradesh India
– CVT always
– Sir can you please support your statement… As we have observed the drift in secondary voltages are more in CVT compared to IVT over a time span
– Mainly installation reasons. they are lighter, cheaper, Safer (transfer of emf when a fault occurs)as there is no direct connection to the primary voltage source.
– Can you explain how does the voltage drift?
– Deterioration in the capacitance levels over a period of operations results in variations in secondary voltages Can’t that be fixed during maintenance? (Note: I don’t have any experience in maintenance and operation Even I don’t any experience in Maintenance. But I am not sure we can improve this ineffective manner)
– CVT for transmission circuits or High Voltage i.e greater than 66kV and IVT for distribution circuits 33kV and below
– Moreover, we are mostly using IVT in 220KV levels also so, I am not aware of fixing methods. I believe it’s a cost trade-off. In India IVTs in 220kV class are more affordable than CVT. And yet you may see them actively used in 220kV stations where the transmission system is at 220kV level. This is because the same CVT would be used as a coupling capacitor for PLCC communications as well.
– That’s my understanding
– Why when we calculate short circuits at transformer secondary we should consider no-load ph to phase voltage not rated voltage?!
– Yes.CVT is more affordable to be used since the consideration of its(equipments) isolation to H.V.
– Yes, we can track and analyze its dissipation factor( Tan Delta measurement)
– Which position?
– This is an AVR relay from ZIV bringing.
-anyone has the pin configuration of this relay?
– If you mean bias setting, then I would say it has to be calculated based on the transformer parameters
– Hello everybody, good morning. any of you run the digsilent program?
– What /which are the switching operations and commissioning procedures of HV / EHV equipment considering the safety rules of power system operation?
-P94V Undervoltage relay showing continuous trip, but no alarm present and all functions disabled, need technical support .can anybody please help.
– Go to view record and reset led Did, but still not going
– To increase the contact Resistance with Ground!

-To minimize step potential
-yes

– Why stone and whether it’s the only solution?
– Cheapest
– Another reason stones are used is ‘cause it helps in the fire. mitigation, especially where oil traps/ sump pumps are not available.

– The leaked oil will have less surface area exposed to air that can burn, thereby reducing the fire hazard.
– Weather dry sunny temp 35c approximately Fault 132kv lighting arrestr and HV bush of power transformer 20/26MVA damaged
– 132kv CT side clamp
-Counter of lighting arrestr
– Lighting arrestr
– Structure damaged After fault jamper
– Analysis as per our senior-most retired chief Engineer such type of fault occurs due to delay of lighting arrestr counter delay. This type of fault occurred in Pakistan time by a time where lightning arrestr having counter are installed. Due to delay HV bush of power transformer also damaged
– Did the Hv bushing passed the lighting impulse test?
– At the time of manufacturing or now
– Bushing may be damaged due to pressure of conductor available 132kv surge arrester if required plz context 03214484444
– I wonder if you have the fault recorder of this lighting surge impulse on your relay
– Are there any lightning arresters at the top of transformers firewall/ other location?
– What’s the fault in the protection relay or fault recorder?
– Ds agile documentation please, guys how can I get cooling oil for a 1000 volt transformer
– What is the relay saturation of the IDMT curve in sepam T80 and S82?

-Any have experience In Reyroll Relays.! I need help with how to change the “Out of service mode”.

– We need to do an 87L test, as you can see in secondary current to relay is very low 0.044A. We did secondary injection for GE L90 relay and found it doesn’t read 0.044A. Value is fluctuating and getting stable at 0.1A.

– Any ideas why the 51N protection of the REF615A relay operates in an almost constant time of 0.06 seconds
– reviewing the operation curve the minimum operation time is 0.02 seconds at least the first 3 tests would have given me the correct value
– check the other seating. Check the type of curve selected in the relay, Whether it is definitely time or IDMT
-1 group setting might b clashing with another one, check all stage settings group-wise.
– Work Is for Automation Visit in Kolkata. Just visit the site at Kolkata only people from Kolkata plz contact me.

– A Power distribution full project including design of LV and MV component
– 40mva x-mer tripped on differential during charging of 33kv feeder with Idr= 0.49pu, Idy= 0.50pu and Idb,= 0.53pu.
Both side LA has physically verified and found ok.
– Did you check the %of Harmonics during charging from the DR?
– please do a stability test and after that examine the results.

– might anyone have the design book of transformers with CRGO steel core and amorphous metal core
– Please guide how to reset DR full alarm in DPR micom p442 Schneider electric
-Maybe you can right-click on the device and select supervise device

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– Anyone has a VALANCE book on “How to Test Breaker Failure Element Logic”?

– I have a problem with Micom P443 for Distance Protection. I have a problem with System Checks for Autoreclose, anyone can tell me what is the difference between CS1 Close Enable dan C/S AR Immediate?
– Cs1 close enable is the setting of sync check on which you want to recloser the circuit breaker like on Live Line Live Bus or Live bus Dead Line or Dead Bus.
– If you enable c/s AR immediate then it means that if during the dead time system check conditions are met then it will reclose the breaker without waiting for the remaining dead time period,
– Like for example if dead time is 1 sec
– And system check conditions are met during 0.6 seconds of dead time, then the relay will give reclose command without waiting for the remaining 0.4seconds of dead time. But you have disables the system check conditions on shot1 which means it will reclose the breaker without looking into any system check conditions,
– Sys check on shot 1 should be enabled too.

– Hi Guys I have a question: what is the problem with a 3phases motor run by A frequency driver, if I want to run it very slowly for instance at 4HZ normally it runs at a modulated Frequency variable between 50Hz and 0 but what happens to a very low frequency?
– I know that it will run slow, but it will warm up a lot right? but more than that what will it happen? somebody, some documentation to explain this phenomenon?
– It depends on the loading. The higher its loading, the more power needed to turn the output torque. If you don’t have a load, just make sure your lower frequency setting has a minimal current to move the rotor..otherwise, it will overheat.
– I even reinstalled my windows not going, I checked internet settings also

– how we can develop an HMI screen of operator name tag id selection in Schneider Vijeo Designer Basic HMI software
– Can Anyone suggest or provide a link for low-cost alternatives for moxa Uport 1150 type connectors with similar capabilities?
– USB to Serial converter

Click on picture for more info about our courses


– Does anyone have sft sav diagnostic software for sepam relay?
– Does Anyone Have the knowledge of selec twix-2 PLC communication with Schneider HMI
– Please have someone ever configured SEL 487B busbar protection?
– The SEL Technical Support Line is available at +1.509.338.3838

– does anybody here has the SUE3000 configuration tool
– Some example of End Fault Protection with SEL 487B??

– Anybody can please share with ME Schneider Software SFT SAV?
– what does this number means 6000 of this RCD?
– It can open currents up to 6000A. 6kA
– Note it’s RCBO not RCD
– What s the difference? Because some tell me it is the max number of trips. RCBO stands for residual current circuit breaker. It can open faults up to 6000A. It can be used for short circuit protection as well as sensitive faults of 30ma. RCD is a residual current device. It’s used only to pick up sensitive 30ma faults. They can’t open full short circuit currents. -Think of RCBO as RCD+MCB
– No it’s the rated fault level.

– We have the following problem with ER make DUOBIAS relay for Transformer differential protection
– Can anyone guide what to be done with this?
– Hi anyone has testing commissioning motor differential protection relay procedure please Sharing
– Short circuit level for this device
– This kind of error shows in sverker 900 Megger relay test kit anyone has an idea what is this?


– Maybe you could try to restart the device. And try to jumper each phase RST to neutral phase.
– Jumper are arranged like this is it ok?
– I have restarted the kit but it not working
– Jumper I1to neutral, then I2 to neutral, and so on. Simultaneously inject small current to monitor the device voltage ports are also not working
– How about the current ports?
-They are also not working
– Make sure when you start the device the knob selector in an off position.
– Check the fuses too

– Does anyone know if you can force or simulate voltage on an ABB relay? That is, without using a device like Omicron
– someone helps, how can I test the GE L90 diff relay as a stand-alone…without connecting with another one. You can only force digital outputs and simulate inputs. You can’t force analog signals such as voltage and currents. You need an external source
– I’ve never dealt with this relay but If it is for line differential, chances are that you’ll need two relays. the receiver and transmitter
– But you can still use the primary injection method to do the testing
– Do you have to test line differential?
– You can go to setting, testing, channel test, and loopback. Inject currents, the relay will consider one current as local and one as remote

– Hello guys, I’d like to ask maybe some of you ever test this type of relay?
– Where we can find the tms
– I think tms is 2
– TMS is nothing but a round dial
– Yes it is 2
– In this case, it’s 2

– for ref relay input problem. Ref620
– From the drawing, check the terminal point associated with this input. Isolate it then troubleshoot that circuit to find out where the “high/positive” signal is coming from
– why inside relay see this message drawing as not a problem?


– I am working with a 2X300 MW thermal power plant in India and our 400 kv switchyard is having Alstom MICOM P 441, REL 670 for protection also for the generator we are having siemens make 7UM622 and MICOM p345.
Is there any standard that speaks of about frequency of relay testing?
– Normally frequency of Numerical Relay testing depends on the utility practices.

– In our utility, we do annually. But in my opinion, it is not required annually.
– Numerical relay can be tested 5 years once. Scheme testing can be done annually.
– anyone has a crack version of IED smart or IED scout for IEC 61850 simulation?
– How to do scaling of this pressure sensor
– these transmitters are of a fixed range
– 615 series?
-RET620
– try to use a new project. if still like that try to factory reset the IED but if it still operation

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– How to connect GPS to this siemens relay 7VE632
-synchronization via IRIG-B
– someone assist me with cpc 100 software.
– You either need IRIG B port on GPS receiver….or you need NTP to IRIG B convertor

– Please find below the parameters you are expected to use as discussed with RTM;
Reactance = 0.2215 ohm/km
Inductance = 0.20808 ohm/km
Suseptance = 0.07573 ohm/km
Distance = 313km
– Please how can I find the positive and zero sequence impedances from the above parameters thanks
– 400 KVAR 90 UNITS. 132KV CAPACITOR BANK. neutral CT 5/5. 132kv CT 400/5. Capacitor protection or unbalance relay current setting? Relay type SPAJ 160 C
– Normally Unbalance protection has one special other CT different from CT 132kv phase or CT neutral but if This CT 5/5A is just for SPAJ protection we adjust setting unbalance between 10 (..)20% In for nominal current this CT 5/5A

– Please explain the working of reverse power relay at consumer end for the small hydropower plant of declared capacity 24.75 MWWhat is recommended Characteristic angle for Directional Earth Fault protection (67N) on SEPAM

-Sepam relay is on the closed-loop network.
-System grounding: resistance grounded (Two NGR Prallelled: 2x800A: 1600A).
The type used for 67N on Sepam: Type-02 (the protection function uses I0 vector magnitude).
Residual Current input on Sepam: Calculation of Summation three-phase current (not residual CT).

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– I want to know if my raw data for the sensor is 0 to 32767 and I wanted it to show in HMI in the format of 0 to 100 bcoz if in system sensor mistakenly get faulty or I have to replace the sensor and the sensor of any other company in my system, so due to this I can change from HMI raw data in the format of 0 to 100 is it is possible?

– Hello, Micom p-243 protect compressor after start 15 minutes then trip. The indication in local HMI (motor fault alarm )but in the protection relay no indication but became an open position. When I go to the record I see this in the pic
– I do isolation resistance for motor by using 5kv meggar the result was 4Gohm

– In HMI how to create operator name error
-It’s over Current, what’s your starter motor current start pick and protection Micom configuration?
– Respected members, Please guide me on how to carry out the Hi-Pot Test/Dielectric strength test for 22kV 3ph Breakers/Bus bar.
-If the available source is DC for testing, how much voltage is to be applied, and any references of the standard for the same.
– How to write scripting language for 0 to 50 Low and 50 to 100 high value in C programming for HMI?

– on Nari pcs9611 relay, when powered on it displayed sub supervision Alarms? Alm-device, Alm -time sync.
How can I cancel?
– set the time synchronization to off instead of sntp
– Under settings?
– under device config or communication.

– Does anybody has ZX0 ABB switchgear O&M.manual
– Especially Gas handling procedures
– HB 600-05 en
– HB 605 Gas handling Manual for ZX0
– I have tested my lightning arrestor for 11KV after removing it from the line and the IR value was 400 meg.
– A few minutes later I have tested it again the value raised to 15 Gig.

– Please I need the manual of Siprotec 7SA87
– Hello everyone, could you help me with the function of the TC1 on the delta winding?
– It’s a current transformer for the winding temperature gauge

– someone knows what is the difference between I> and I >>?
– I> is the short time protection setting and I>> is the instantaneous protection settings of the overcurrent relay
– Can somebody tell me what happened if the tripping coil resistance and a closing coil resistance of vcb are the same? then there is any impact on the performance of vcb?
– You can return to the datasheet of the circuit breaker and closing and tripping coil, you can find the standard values of the resistance of the trip and closing coil and compare it to the measurement
– I just want to know the theoretical answer Behind this.
– From an electrical engineering point of view
– closing coil resistance is designed much less than tripping coil resistance to having a stronger magnetic field
– Yes I know it is designed, but my question is if they are the same then, what happened?

– does somebody here have some “how to configure Modbus protocol in SEL relays” document or some kind like that?
– Someone has a method statement of Testing CVT Tan Delta

Click on the picture for more info about ABB PCM600 course

-Does anybody have a project for the RED670 relay?
– Anything, in particular, you are after !’vv?
– Current line differential relays are fairly straightforward?

– Anyone knows what is the problem when a source (power plant) transmits power to a substation, then the neutral current monitored in the power meter is a bit higher normally?
– I know that It means that there is an unbalance current on each phase. But what else can be that causes the phenomenon?
– The P.F on phase R and S are lagging 0.9, but phase T shows a leading P.F.


– In case it’s an internal fault, just assume that the 87 T relay and Ref relay will trip?
– your understanding is correct. But apart from it, if primary Overcurrent (50/51P) works, it will trip the CB 150 kV, and how about the CB 20 kV?
– Is it required to trip the CB 20 kV too?
– 87T trip, REF not really, depending on the fault. PP fault or 3P internal fault won’t initiate REF
– To isolate the power from LV side too, in case of bus section in 20 kV side is closed
– Depends on the control scheme we use in most of the cases we adopt if HV side CB trips on protection LV CB also gets trip, REF is more sensitive for earth faults in the differential zone. If it is an earth fault REF trips faster than Diff.
– I think that 20 kV CB will need to trip too to prevent reverse power from the remanent voltage (power) at Bus 20 kV side. But if there is a remanent voltage on the 20 kV side, is it possible to induced voltage in the primary winding to create a current.
– Since you have NGR, earth fault close to neutral may not be detected by REF.
– Percentage of the unprotected zone can be calculated based on relay settings and CT ratio.
– Yes. due to the resistance, the sensitivity will be limited.
– Have everyone ever tried to the induced voltage on the secondary winding of step down Transformer i.e. let’s say 150/33 kV. How about the primary winding transformer, does it will generate a low current or a harmonic current?
– Actually, fault moves towards the source. In actual LV will not trip because the fault current will move towards the source side(150kv) side but if inter trip function is available then LV 20kv side will trip too
– Anyone knows about the calculation to get the value of Z1 Sensit. Iph>1 ?
– Fault current should be above this value to identify zone 1 or zone 2 faults
– I got it. But how to get this value.
– Okay. I have found it was 1.2 x CCC / CT Ratio
– CCC indicates which value? please clarify I have doubt about the Current Carrying Capacity Of the conductor
– In Distance Relay
– Anyone knows the CB IS( In-Service) Time function?
– Since I close my CB then the IS time starts to count to set AR Block
– If CB is manually closed then after this time CB will be considered in service and the Auto Recloser function will be enabled too.
– But why it AR block indication appear.
– After the CB IS Time starts to count. Still struggling on this distance relay
– Because during CB IS time AR Function is disabled to block the AR on SOTF fault, change to ABB REL670
– What type of relay is this one?
– P443 Micom
– does anybody here has a p14d Modbus register
– who knows the ZIV default password
– Any ZIV relays specialist
– Hello all, does anyone has a GRL 200 Toshiba Line Current Diff Manual Book?
– Four corner numbers 7931

Join 20 WhatsApp groups for protection engineers

20 WhatsApp Groups for protection engineers

  • WhatsApp Grp 01: Protection Relay – General
  • WhatsApp Grp 02: Substation Automation – General
  • WhatsApp Grp 03: Transmission line protection
  • WhatsApp Grp 04: Transformer protection
  • WhatsApp Grp 05: Motor protection
  • WhatsApp Grp 06: Generator protection
  • WhatsApp Grp 07: Overcurrent and Earth Fault Protection
  • WhatsApp Grp 08: Busbar protection and Bay controller
  • WhatsApp Grp 09: Breaker protection and control
  • WhatsApp Grp 10: Protection Relay Testing and commissioning
  • WhatsApp Grp 11: DIgSILENT
  • WhatsApp Grp 12: ETAP
  • WhatsApp Grp 13: PSCAD
  • WhatsApp Grp 14: IEC 61850 configuration
  • WhatsApp Grp 15: Switchgear GIS & AIS
  • WhatsApp Grp 16: GE Relay Configuration
  • WhatsApp Grp 17: SIEMENS Relay configuration
  • WhatsApp Grp 18: Schnider Relay configuration
  • WhatsApp Grp 19: SEL Relay Configuration
  • WhatsApp Grp 20: ABB Relion configuration or more services, send a message to our WhatsApp support number: +989129613659

Sample discussion:

– I have a Zivercom relay for the Tap changer. everything looks fine but it’s not Tapping who can assist tanks
– is anyone familiar with Siemens Siprotec 4 7SD Line Current Differential Relay? For example, one end of the relay is select in Commissioning mode(test mode), will the remote end relay differential protection be in commissioning mode or test mode also?
– Commissioning mode at one line end will not turn on commissioning mode automatically to another side. Plus commissions mode is completely different from test differential mode.
– Can you explain a bit more about the test differential mode?
– Does turning the test differential mode at one end will also activate the test differential mode of the remote end?
– Anyone REM620 relay this message what problem
– Anyone has the actual standard IEEE 485 or an excel sheet? I need to size the substation battery charger, please!
-IEEE 485-2020?

– Does anyone know what these signals are used for?
– Apparently, they are permissive of Switches
– RECEPTION RRR, RRA, RRX, and RRY
– the arrangement of the substation is as follows
– Have anyone tested Cap bank differential protection in Siprotec 5 7SJ85 relay?

– constantly getting this error while writing to the IED
– delete the HMI page first
– do the license update tool
– Does anyone have software for this relay micom2.1?
– I have found Micom software if anyone can give Ziv software as well plz
– In our substation incomer feeder is tripping downstream and upstream without any fault when switching on outgoing feeders.
– Please suggest any idea to solve the above-mentioned issues
– What fault recorded by the relay?
– There is no fault on the relay but upstream and downstream are tripping when switching on any outgoing feeders.

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– Any circular regarding the fair service life of various testing equipment in the power sector.
– Hi, has anyone ever replace these manual annunciator window tiles with a 3rd party tiles? or other alternatives?
– We are facing this kind of rebooting issue with the AREVA Micom P742 peripheral Unit for busbar protection. Anyone have any idea regarding this issue. How to overcome this?

Protection Relay Discussion Group in Telegram: https://t.me/joinchat/Cmyg2FiXX-qlTYqyXQ_pjg


– Can we use a 10 ac drive on a 15 hp motor?
– 12.5 hp drive on 15 hp motor
– Hi All, do you guys ground the shield of control cables at both ends or only a single end?
– Single-end
– How about for CT VT Cable?

– May I know would there be an issue if we use a CT with a high Burden (15VA for example) for a protection relay (microprocessor type). For the old mechanical type, I understand that the CT need a higher burden to drive the armature
– when I turn on the generator in this panel my generator has an unstable frequency but when I operate it manually the frequency stabilizes. what may be the cause of this?
– Is your gen-set in synch with other gen?
– no sir.
What is voltage?
– plz check the gain & another setting for your operator panel
– 460v
– there is no problem with the engine & gen-set itself it is the only problem with the operator panel feedback signal which will be generated as per setting
– Cause freq regulation is in generator itself not in Woodward
– we try to bleed fuel on the generator. but nothing happened
– I thought Woodward only does parallel synchronization and some protection functions but is only using small loads that’s why we don’t sync our generators.
– I looked at the manual for easygen. Actually, there is a function frequency control. I have the same system
– But never got time to check every function in Woodward.
– I do check some functions but the configuration has a password. the management told me that the supplier has the access to its unit.

– does anyone knows about arc resistance and tower footing resistance value for the 765KV transmission line?

– I need to disable goose controls in the REF 615 ABB relay. Is it possible from HMI?
– who can assist me with an IED scout that’s licensed REG630 how to testing method DOPPDPR function Power Angle setting anyone to have a formula
– Could anyone be having transformer test guides preferably based on megger make test equipment?
– Paci’s configurator from Schneider, can anybody have this software if yes kindly send me the link, it’s urgent please help me
– Somebody has REX640 TERMINAL DIAGRAM?
– Does anyone know how to choose a zero-sequence transformer?
– In VAMP300 relay display LED continue to glow without assign, without mapping with DI points… what is the issue please kindly suggest!

– Need help in ABB RVC APFC Relay programming.
– If anyone has a license for REB500. Can help me, please.
– ABB normally do not release that license which allows you to configure
31etap 12:00 – abb pcm600: The user license there isn’t much you can do with it.

– Kindly someone tells me that in C264 Relay, how to change synchro-check parameters and find the passwords?
– Connect to Cat tool to these devices n check network parameters. Trying to read the setting but the reading takes a few hours. Are there any solutions ?
– I assume some delays in the network..try connecting them one-to-one if possible.
– Try to reboot the relay
– what could be the problem if Generator Shuts Down on High or Over Frequency, Over Frequency Runaway
– If you are connected to the grid

Burn the rotor due to induced currents.
If you are in islanders mode:

damage the connected equipment

– is it ok to run a generator that varies 59.9-60.1 frequency?
– Trying to read ABB RET 670, but the messages show up like this
– Any insights into this problem
– Does anyone knows how to add delay time in VT Fail ABB RED 670
– Not very sure but….Inconsistent state means the current values in PCM are not reflecting the ied values. If a reader does not resolve this try to see if there is a new version of PCM.
– 132kV transformer HV breaker was closed on NO load and the LV breaker was open, but suddenly differential relay operates and gives a differential trip. In the fault study, the HV side current was 860 Amp. Somebody tell me that what could be the reason?
– For how much time the transformer was on no load? 132/11.5kV?
-Approximately 10 to 15 minutes
– MVA?
-132/22 kV (wind power plant)
– There must b some issue,
– So this is not inrush
– Do TTR and winding resistance,
– If it is the newly commissioned plant then the issue will be in the relay setting otherwise check transformer winding…do the IR…
– I did an excitation test @ 10 kV and the results were OK.
– Plant is in operation for the last 4 years. You will have to do TTR and winding resistance to diagnose the matter, Hope you will get the problem by doing these tests,

– Any mechanical protection PRD, BUCH has operated. Did u retrieve the fault records from the relay?
– TTR?
– turns ratio test
– No any trip from mechanical protection.
– In fault record HV current was 860Amp and LV current was 0 amp.
– Check the CT ratio adopted in the differential relay and what was the differential current setting adopted and actual current during relay operated?
– Transformer turns ratio

– 860AMP WAS SINGLE PHASE OR TWO PHASES OR IN 3 PHASES?
– In 3 phase
– Did you check the lighting arrester AT 132 KV SIDE?
– Yes surge arrestor can also be damaged or weakened, as you are using Yard CT for Differential protection
– do also check your HV arrestors

– Can anyone help me with the PACiS configurator?
– Physically that was OK, for counter I will check
– Do hipot test of arrestors, might be differential tripped because of arrestors, If u have a secondary injection kit like Omron or Freja plz do the secondary injection to know that there is no problem from the relay side.
– can I ask why my plc doesn’t read flow?
– Check that analog signal is reaching from your flow meter to plc?
– Check 4 to 20 amp signal

– Hello guys, does anyone know how to avoid distance trips when VT Fail occurred on 3 phases in REL 670?
– Anyone has any material for Artificial intelligence application in Protection?

– Pls help me how to install PCM 2.10
– Strongly recommend installing on virtual machines
-After 3~4 different versions, they always conflict and give errors.
– I run different virtual machines on the ESXi hypervisor.

– I need help to analyze this Disturbance Fault Record whether it is due to Lighting or Flash.
– It was fault on Line Diff and Reclose on Phase R.
– Anyone Plz tell me, what is relay coordination and what its functions?
– Line auto-reclosed successfully?

– We have 50/1 5p15 CT installed on a 33 kv feeder whose fault current initially was very less but now the Power supplier has installed a 50MVA transformer with 11% impedance
29etap08:55 – abb pcm600: And fault current is almost 8000Amps, I believe I need to upgrade protection CT in order to meet high fault current
– Can anyone suggest What’s the 33kv fault level?
– Now it is 8000 amps. Fault current level 50 MVA transformer installed at state electricity board substation and we are consumers with 33 kv feeder voltage
– 50MVA 220/33 KV star/ star connected transformer 11% impedance
– Is the ct used only for over current and earth fault?
– Yes 50,51, 50G, 51G
– Strictly speaking, I would put 200/1 5P40 2.5 VA. However, if the relays have CT saturation detection, you could go lower.
– What’s the relay being used?
– P127
– Do you have the CT test results. In particular the DC resistance of the CT.
-Can you give your consideration or calculations for this selection
– So you need an accuracy limit factor of 40, with a low burden.

– you won’t need much burden as the relay is numerical and installed inside the switchgear
-Your existing 50/1, 15 VA may actually work if you knew the DC resistance.
– Do I have to check with the CT testing kit??
– I believe CT supplier should I have this information
– Yeah if you have test equipment (Omicron CR analyzer or similar) that should be easily possible
– That’s possible, however normally the manufacturer will not specify the DC resistance for 5P/10P class acts. No harm in asking them though
– CT’s Analyser
– Ok I will check with him today, as I don’t have an omicron kit available nearby That the only option I have

– How you coordinate DC resistance with fault current?
-So if Rct<= 1.75 ohm, you can use it For a 50/1 A ct this may be achievable.
need to Replace 33 kv side CT with, 1000/1A, 5P10,15 VA With this approach, I’d reckoned to check the pickup values.

– Ynynd1 And tertiary (delta winding) is unloaded??
– Then no issue transformer will follow system phase sequence,

– What is the difference between IN-HV Deriv Angle and IN-HV Measd Angle on monitoring online?
– Derived means the neutral current has been calculated by summation of IA, IB, and IC whereas measured means neutral wire of ct secondary is connected to the neutral element of the relay, and it is actually being measured,
– What is a dead zone in protection??
– Dead zone is the Zone between CT & Open CB. It’s the point not seen in the zone of protection that of a relay. If a fault occurs at this point, the relay will not issue a trip. Usually between CT and breaker
– IN HV deriv is neutral vector calculation, meanwhile In HV measd is a neutral REF winding
– We cannot say it is neutral ref winding until we see the setting of the relay,
– setting of the wiring diagram right. The setting of the relay and schematic drawing depicting the connection of the ct secondary wires with the differential relay.

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protectien relay


– How to calculate capacitor in mfd?
– Step by step distance quadrilateral characteristic for all zones how to draw. please give me any documents sir
– Please suggest Which one is better for bus voltage measurement Induction VT or Capacitive VT?
– Would selecting any of these two make any difference, especially in bus voltage measurements? I don’t think so.
– Capacitive surpass Power Line Carrier (PLC) otherwise they mau consider the cost on their design.
– Cost it seems IVT is more at higher voltages.

– Can anyone share how to use sverker for relay testing
– Can anybody share digsi training material pl…14etap training, 12:11 – digsi 5: Mail sent …material and configuration
-Would you please recommend a book or reference for testing protection relays?

-Hi anyone has any training materials for IEC 61850 configuration and testing. Please share. Thanks in advance.
https://elec-engg.com/iec-61850-training-course/
-I used this training pack, very informative and helpful 👌
-Does it got configuration in IED scout?
-Yes

– Anyone has a manual of ABB aux relay model RXPSU14n

-everyone plz anyone tell me what are these feeders? 1. 11kv Substation loop feeder with fiber optic cable. 2. 11kv Substation loop feeder with pilot wire (send end supervision relay time). 3.11kv Substaion loop feeder with ( receive end supervision relay type)

-Please tell me which terminals are to be used for Carrier Send & Carrier Receive?

-this for scheme logic distance protection?
– Yes
– From highlighted portion, u can understand
– Sir, 1&2 for Carrier send and 5&6 for Carrier receive?

– Can anyone tell me details of these terminals, it’s an ABB make ACB, SACE PR 121/p ( SACE Emax E2), Open coil, closing coil, motor supply, then Indication ckt, Contactors ckt,

– Can anyone please name a few line auto reclosure 11kv and 11kv and 33kV fault passage indicator manufacturers based in India
– Can anyone give to the solution of board change ABB REF542+ relay
– Which type of communication cable require for ABB to make REF542plus?
– What could be the issue that the Ready LED is not glowing?
– Ready LED of D400 is not glowing..and our SLDC ppl are not getting data of the entire substation.
– Please suggest how to rectify the problem.
– If anybody has a 220KV substation all equipment SOP for operation & Maintenance. Please share

If interested in ETAP discussion Whatsapp group, send ETAP to me on Whatsapp: +989129613659
Topics, ETAP software, Relay coordination, power system, industrial design

– Have anyone idea about the overcurrent coordination between generator and generator transformer
– pls tell me how to decide Bus coupler CT ratio in the 220 kV Double bus bar system?
– Need IEC 60623
– Pls share if any member has it
– What is the busbar current rating, quad moose
– Can anyone reshare the pdf for electrical notes
– Anyone who knows Ziv relays plz contact me
– U want Ziv relay person no?

Our other groups :

. PSCAD group
. Substation automation. Please
. SAS WhatsApp group
. ETAP WhatsApp group
. SAS WhatsApp group
. Substation Automation & SIPROTEC & DIGSI Whatsapp group
. SCADA

text on Whatsapp: +989129613659

– please anyone has SEL 487v technical Manuel for negative sequence
-Hi, anyone knows ZIV SCADA??
– Can anyone send me the Complete Design calculation PCC/MCC with 11KV / 0.415 V Substation.
– Can anyone share electrical notes latest version
– Substation Automation & SIPROTEC & DIGSI Whatsapp group, please
– Hello guys I should to cables tray, 90 degrees, 60 degrees, 45 degrees, and upsets and down set formula please help me
– our generator after start display come like this why my friend’s please give solution
– I have Relay GE 369
The password is forgotten How do I open it ??? How do I delete the old one and make a new password and delete the old one ???
– Password reset is done in GE Canada only
– STK-20200819-WA0001.webp (file attached)
-STK-20200819-WA0002.webp (file attached)
– Can anyone give me information on how much the Clearance for 132/33/11 kV windings and the tank for 63 or 90 MVA according to IEC? Our Company design? And if possible the description of how the oil insulation process works according to this distance?
– Mean insulation between HV winding and tank
– anyone please share the HVDC station Single Line Diagram.
– Can any one of the engineers having p632 transformer differential protection calculations.
I had calculations for p633
– P633 is for 3 winding transformer differential protection and P632 is for 2 winding ones?
-I had dealt with 642 and 643
– Relays in transformer differential
– No idea on 63..series
– We are using P643 as 3-winding Transformer differential protection. And P-633 as Overall differential protection comprising Generator, Generator Transformer, and Auxiliary transformer

Does anyone have a document SLD for the bay Reactor? Please share with me..thanks
– If anyone has a REM615 backup file please share.
-Plz share anyone Modbus function codes

-Astrum…..anyone has software for this converter
– Type rs232 to USB converter drivers. Micom(Areva) P121 software version is 6.H relay don’t connect with relay
– Using Micom s1 studio and Micom s1agile
– I downloaded all data model still same error present
– Change the USB port of your laptop and try again
– Go to device manager on the laptop
– Check driver settings
– Assign as per p121 communication parameters
– Is your OS Windows 10? Then it will be working without a driver. To check whether it is working go to Device manager and see the listed Com ports.
-I downloaded the software now it’s working
– No 10
– Please share this relay terminals details.. 12 and 34 are NO/NC contacts
– 9 & 10 are current coil
– 1,2
– After coil operation…what the status of NO contac
– 3&4 would normally be used for trip wiring as it has a trip isolator switch in series.. see the red tab on the grab handle of the relay.
– This particular model is a self-powered type. So terminals 5,6,7,8 are not used. Power is derived from CT terminals 9&10.

– Can anyone give settings for this transformer….. relay is. Areva P633
– All that you need from this nameplate are
1. Trxm rating 20000kVA

  1. Voltage levels 66/11kV
  2. Vector group YNyno
  3. CT ratio if you are using the bushing CT?
    – no I want relay settings for Areva p633

    -Anyone has manuals for this temperature switch for the transformer
    – Please share any procedure to communicate with CSC 326 relay using CSPC software
    – Can anyone share a drive selection guide: I want to convert one dc motor drive to VVF drive
    – Please share the Secure Premium 100-meter manual.
    – sir, Premier 100, please.
    – sorry, I don’t have premier 100 series manual
    – I need Secure Prodigy meter manual. Can anyone share, please?
    – What is the standard followed for 132 kV cable ampacity calculation?. ( Installation method above ground).

– Anyone please share the Operating time formula for Normal. Inverse 1.3 seconds curve.
– this is for the Normal Inverse 3 seconds curve I think
– In the case of 1.3 inverse curve instead of 0.1414 take-ups 0.0613 value should be used.
– Does the Overcurrent Highset setting for the feeder depends on the Transformer capacity in the substation?
– Suppose bus fault current 12 KA, and no of connected 3, den 4ka per tr, 400O o/ c high set. Instantaneous
– You are very correct in order to preserve the transformer life span
– we have 132/33 kV and 220/33 kV substations with 33 kV Feeders…one of my friends told me Overcurrent Highset depends on Transformer capacity.
– how to decide on the highest pls tell me?
– The sum of all the feeder’s load must be equal to your transformer LV capacity. it depends on the load on each feeder. See bus fault current first u HV 2 calculate For both the cases then divided it by no. Of tr.
– Make it ur hv o/c high set
– Tr mva/ tr percentage impedance. Highest fault mva for ur transformer
– We also face difficulty with the password of this relay. YouTube videos did not help.

How can we reduce the tripping of the transformer due to insrush current?
– Transformer 10MVA,66/11KV
HV side CT ratio 125/1A
LV side CT ratio 800/1 A
Relay Micom P642
– Settings of harmonic
– If I’m not wrong, in modern transformer because of core material, the Inrush current harmonics are sometimes less than 20% of fundamental frequency component due to which differential relay operates. So, we can keep the setting at 15%. For second harmonics we can keep this at 15%

– anyone knows passwords to change settings?
– 000000

– please tell me what is the general delay time used for Overcurrent or Earth Fault Highset protection?
-Depend on your coordination
– Zero
– 100msec
– To allow line zone 1 to clear fault first

Join 20 WhatsApp groups for protection engineers

  • WhatsApp Grp 01: Protection Relay – General
  • WhatsApp Grp 02: Substation Automation – General
  • WhatsApp Grp 03: Transmission line protection
  • WhatsApp Grp 04: Transformer protection
  • WhatsApp Grp 05: Motor protection
  • WhatsApp Grp 06: Generator protection
  • WhatsApp Grp 07: Overcurrent and Earth Fault Protection
  • WhatsApp Grp 08: Busbar protection and Bay controller
  • WhatsApp Grp 09: Breaker protection and control
  • WhatsApp Grp 10: Protection Relay Testing and commissioning
  • WhatsApp Grp 11: DIgSILENT
  • WhatsApp Grp 12: ETAP
  • WhatsApp Grp 13: PSCAD
  • WhatsApp Grp 14: IEC 61850 configuration
  • WhatsApp Grp 15: Switchgear GIS & AIS
  • WhatsApp Grp 16: GE Relay Configuration
  • WhatsApp Grp 17: SIEMENS Relay configuration
  • WhatsApp Grp 18: Schnider Relay configuration
  • WhatsApp Grp 19: SEL Relay Configuration
  • WhatsApp Grp 20: ABB Relion configuration or more services, send a message to our WhatsApp support number+989129613659

– hi, anyone has a ZIV RELAY course about programming its logical control, and interlocks? I need to understanding completely but is not possible only to use the manual brand, located on their website.

-Anyone faced this problem while adding a relay to the IEC station in sip5?
– If anyone having sepam relay thermal calculation sheet please share it with me.
– if CT gets saturated .what is the solution after CT gets saturated. We want to replace CT or any other solution
– CT secondary current flow to the secondary winding
– How are confirming that CT got saturated?
– Sir for knowledge purpose if CT gets saturated in future
– If in the future we observe these types of the problem how can we overcome these types of problems.
– Which purpose bypass resistor used in Modbus communication ??
– What is the burden of your CTs?
– Saturation is purely a magnetic property issue. So there is no alternative solution to do corrections in the circuit rather than core replacement.
– You need not replace your CT there are ways to demagnetize the ct
– Can you explain in detail the theory of core saturation in ct
– How can we demagnetize the CT? We had followed demagnetization in transformer ..whenever we got erroneous values while testing dc winding resistance
– The easiest way to demagnetize a CT is to apply the test current at a level that approaches its excitation ‘knee’, then slowly decrease the input current to zero. This can be done with secondary excitation or primary current injection.
– I think some tester offer this option, Like omricon ct analyzer
– Can you explain why you need to replace your ct?
– What is the solution to these types of problem
– Anyone having a method Statement for how to create logic for Sepam Relay using SFT2841

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– we are getting the above error when communicating with RET650…Please tell us what could be the problem?
– Rollback package software needs to be updated using the Update manager of PCM600
– I could not find the Rollback package software. It’s in update manager, select relevant relay IED connectivity package. In that package, there is one rollup package that’s automatically installed.

– 33 kV ABB circuit breaker Trip coil and close coil have a PCB connected to them. Pls, tell me what is the use of that PCB?
– I think PCB meant for capacitive tripping device CTD. CTD separate unit is present sir
– black color portion in the above image
– Check the drawing, While Exporting, Icd from Abb relay -PCM 600 the icd file in Browser, showing TEMPLATE
– In scheme ..no drawing of PCB…the electronic ckt PCB meant for coil protection purpose / to safeguard coil.
As the coil is designed for a short time not for continuous.
– what kind of protection is used, sir?
– what are the steps to be followed when synchronizing a new 220 kV Transmission Line to an existing 220 kV Bus?
– Anyone has a WINCC script for the addition of tags and displays on the HMI screen.
– This is a 220 kV ABB make LTB245E1 type circuit breaker. Please tell what is the use of S7-A circled in the above figure
– Did you lookup S7 in legends?
– I think you could find working philosophy in the breaker manual
– It is mentioned Blocking switch but the function of it is not mentioned anywhere?
– For emf voltage discharge
– They are opposite
– I think they are for an anti pumping system, isn’t it ??
– Anti-pumping will come only in the Closing path. This is an AC motor (Spring charge) circuit I think.
– Spring charge also needs to cut off, so I thought Motor Cut off will be via Q1 contacts in series. S7 contact is, like AN said, for discharging stored EM energy in the motor winding.

– Anyone knows how to download cid file from sepam relays and how to do goose configuration?
– Hello guys, please how do I program the LED of ABB REF615. My main challenge is to change the parameter setting from false to true.

– Hello colleagues, I have a question, in case there is a fault on the 33kv or 11 kV side is there any impact on 132kv side protection equipment? Mean did the protection will sense the fault?
– overcurrent relays on 33kv from TP, maybe send a trigger From application configuration
– Yes 132 side will sense the downstream faults but it will work as backup protection for downstream protection
– Dear all, in abb REM 615 RELAY, HOW WE CHANGE NO OF HOT START FROM 1 TO 2, WHICH PARAMETERS OF STPPMSU HAVE TO CHANG?

– How to calculate phase sequence angle in cable
– Anyone pls explain how to set the power calculation for the reverse power relay…
-How to calculate the size of earthing cable for DCS or PLC?
– SQL SERVER MAKE MANUAL START, Then open PCM Again
-Please reply to this expert
-1.press windows +R
2. type services. msc and enter
3.right-click on SQL server (PCMSERVER) AND THEN START
– when I start services
– Reinstall the SQL server 2014
– Please can anyone help me with the primary impedance R1 + jx1/ km and R0 +jx0/km value of a Bear conductor ASCAR 250mm² with a diameter of 23.45mm
– Hello guys! Anyone working with GE Multilin D30? I have a relay that seems to be unconfigured on distance. Backup OC and EF are enabled but seems no contact is assigned for tripping though it shows indication during testing. 50/51, 50N/51N


– Power Swing Block is used and activated in Distance Relay to block its operation in case of Swing period disturbance
– It’s not about definition. I want ABC concerning enervista.
– Emanuel starts reading the D30 manual.
– What should be OLTC AVR relay PT Lower and raise voltage settings.

– Secure Premium 300 energy meter is showing like this in the parameters..please tell me what is its meaning?
– CT low means very fewer amps detected by ct
– What is the meaning of VT polarity?
-VT polarity mean instant of increasing live terminal to positive is the same instant of increasing live terminal in secondary to positive in this case polarity is good and this secondary terminal is x1 and x2 is grounded. But if vice versa x2 become life and x1 is grounded For VT polarity Test the same ways of CT polarity Test
– Is it effect relay operation
– Of course, if this relay is Directional or Distance or Reverse power Relays and also if powering measuring device as kwh meter

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– What we have to check if the transformer tripped in?
– DGA, Insulation, Ratio, Magnetic balance and Winding Resistance
– Hi guys, do you know where I could find a bibliography for protection for photovolics systems connected on the grid? I need to know a siemens V4 relay can work as a time source for micom relays
– Magnetising current, Short circuit impedance test of the transformer are also important to check for any deformation of windings. Turns ratio test and DC resistance test of winding.
– SFRA test is also one of the diagnostic tests but it’s not done in most the companies
– Do you mean the bandwidth (this determine when the tap to shift up/down)?
-, Yes


– Please tell the ‘distance’ below which ‘Line Differential Relay’ should be used for protection of 220 kV or 132 kV Transmission line?
– Line differential use mostly for underground cable not over a headline for e.g RED670 Abb line differential and for OHL REL670 will be used
-In addition, RED670 have the ability to protect distance too
– sir, why is it that Differential is used for cable and not a line?
– Because with differential you are normally using fiber Optic, laying parallel with feeder. It is common to use line differential for underground cable and distance relays for overhead feeders
– Cant we have line diff if we have OPGW with the line?
– As much I know there is no distance length specified for Line differential relays. Line differential protection is also being used in overhead lines especially short lines and for high voltage lines that have redundant protection such as 400 kv
– Yes I think it possible, the line can be used with opgw too, but I never face that actually in our system

-anyone has 2 phase transmission line with ‘line Differential protection’?
Line differential protection is being used for very short lines say less than 1 km. We are using it on 550 metres 220kv line.
-will anyone please the type of curve used by Indian railways for Overcurrent protection of the traction feeders?
– Very inverse characteristics
– why is it used and not Normal Inverse or Extremely Inverse?
– Main protection is overcurrent protection for railways..they adopt very inverse in the downstream network..so for relay coordination, we use the same curve

– Anyone knows how to configure goose signal at abb PCM software.pls share documents if u have
– How to check I/O Status in sepam80 relay
– In HMI, Or Software
– I have used this once before, now I am not getting it
– Once Relay is Connected with ur Lap, There is Spanner Symbol Available in Icons, Open it, Directly it will go to I/O Monitoring In HMI, Press Main Menu, U ll Get IO page Directly, Press Enter then Side Arrow for Next page
– Does the main menu mean this one?
– Press 13, then Options will come as I
– If I am using this protection output in logipam, then where I want to enable it and give settings
-For 50/51N_1_3, I enabled unit 1. Then where I have to give set. In group A 3 or 1
– Anyone please share the Power Swing testing file for Omicron CMC356?
– Anyone has EMCO AVR relay service engineer contact no in india
– How to calculate transmission line loss from line length
– i^2 * (unit R/km*line length) will give for one phs

– Dears how to activate the help file “about” in digsi4 software
– Anybody has a manual for ETL 41 ABB PLCC equipment?
Kindly share.
– In EMCO AVR relay at the parallel of PT supply component used which is burnt is capacitor or resistor
– To test directional earth fault relay, voltage I’m giving is healthy and how much current to give and its the angle In earth, fault make voltage less in one phase
– Your test will fail because you inject a healthy phases voltage, that’s mean there is no zero-sequence voltage needed to operate the relay. You should simulate a real fault, if an earth fault happens to phase A the voltage of this phase will drop to a low value

– I’m trying to press the about button but the help doesn’t open the specific tab explain ‘ although I reinstall the device drivers
– Install the Device driver with help from the siemens site
– Already installed but it appears as a total manual in pdf, not an individual parameter
– Anyone has logic for soft on manual close command in p444 micom

Anybody having Precommissioning and Commission procedure or MOS for Substation Upgrade projects

– What is the Siprotec 5 Relay Password??
– 6 times 0
– Tried, not Working
– 222222

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-I am facing a problem with SFT2841 authorization code/registration.

-Register with ur mail ID, code link will come
– U can give any mail ID, and number. It will get registered.
– I got it registered. But still can not log into the sepam, any ideas
– Do you use a USB to serial adapter or you have built-in serial port?
– What’s the relay model
-S42
– Is this cable fit for Front port communication?
– Yup

– Hello everyone I had a problem with siemens siprotec 7vk61 relay it is not measuring injected current and the relay is not showing measurements could anyone please help me out with this
– Relay showing measurements in

is there any Error led?
– No led
-Try to initialize the

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– MLFB file with the same version, Then configure as per your system Then check
– For what purpose this relay used?
– Breaker Management
– Eg, like TIE bays
-Auto reclose
– AR for tie.. and alll
– Inside software you checked the measurements?
– It is showing “———” this on measurements
– Error in IED
– Yes also it is not showing in digsi software
– Check the Control options in Relay

-Anyone having Areva P521 pilot wire Relay Technical Manual .

Need Areva, not Schneider.
– How to find the slope for low impedance REF in sepam T81
– Please tell me What value of Contact Resistance is acceptable for 33 /132/220/400 kV Circuit breakers?
– ABB de 30 a 40 micro ohm
– The contact resistance value depends on the current of the circuit and not on the voltage.
– You should evaluate the manufacturer’s tests also evaluate the dissipated power in the resistance found. Then compare with the short circuit power of the circuit breaker
– If I install the 7sr100 RK all template then I got the 7sr100 r4h-1a. it’s crt?
U install Rk range

– H series will come In minimum all template
– the 7vk61 is not showing measurements do anyone have a solution for it
– Anyone with guide notes for using sverker 780 relay tester On vamp relay?
– What is this infuse failure relay?
– Looks like selenium rectifier 3 phase. Also called a metal rectifier


can anyone help me with how to test overexcitation on the generator by CMC? V/f =1.2

-Voltage KV rating how much?
– 11kV
– There are two methods to check, one is increasing voltage and second decreasing frequency method.

1Keep frequency constant and raise the voltage.

2 Keep voltage constant and decrease frequency. In both cases, plz continues to monitor the v/f meter on display.

– Do anyone has a solution for this relay it is not showing measurements
– Kindly check the logs once. I was assuming that there is a configuration issue. Because device healthy condition.
Apart from that, this is a sync relay so there is no ct connection and this window is for current measurement.
– Sorry not Sync it is auto recolse relay
– Trigger the check syn Input, Manual, or Give all measurements properly.
– What is the best method to find zero sequence impedance of line?
– U have to take it from the conductor manufacturer he provides you with R0 and X0 and you can calculate.
– Ct are connected

– How can I synchronize the relay time and date with the laptop time and date in siprotec 5 Siemens relays
– How to check this curve 2 in sepam m87 relay?

– anyone has ideas for loss off comm on SIEMENS 7SR1811.
– we checked the fiber comm is ok but the commlink still failed.
– How you checked fiber communication?
– by applying laser light end to end.

– when we read this error coming to any solution to read. ABB Rec670
– Kindly provide auto reclose logic for ABB bcu. For one and a half scheme 400kv.
– There are two SEL relays for the same line prot. have different order numbers while one comm. the channel used for direct fiber and one used with media converter. Still found a comm. Fail can you help
– can I use PCM 600 for version 2.8 in the relay?
– Yes. But must have the connectivity package of the relay you are communicating.

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– Does anyone know how to communicate Double F6150e with the F6300?
– Use the network for communication using pc.

– Can I change power disconnectors or isolator’s control in substations from working by classic control to work by PLC ( programmable logic controller)?
– Same generators on parallel connection but one either not taking load or shedding of load at 50%. What can be the coz?

– Anyone knows cable testing IEC formula both ac and dc?
– We have a 7SJ62 Siemens relay protection. In the event log, the time and date have a question mark (?). The source protocol of our device is Ethernet NTP. Why we have a question mark on the time and date of the event?
– Your device time is not Sync with GPS Clock

– Pls guide anyone on how to check the spring charge motor trip test using the B10E megger kit
– I need advice on protection on a 132kV transmission line to connect to a solar PV plant producing 92MW.
– This is the first generating plant like this proposed in the country.

– Does anyone know how to make logic equations in Areva P921?
– Exact solution for this?

– This problem is coming in Digsi while communicating via USB.
– In the taskbar, there is comtask32 close that first then close digsi and restart with run as administrator or restart the laptop
– Apart from this?
– Means I don’t know
– This happens whenever you disconnect the device in online mode. If this is happening only one or two times while communicating device then you have to follow the same procedure as mentioned.
– However, if the same thing happens after doing this then you have to repair your digsi.
– Digsi repair also tried the Same problem arising, Random at some periods Some Times.

– devices connected? After repairing
– Different devices only, Then try to connect in another project don’t connect on the same file,
– I’m, using Digsi for a while.

– Randomly I have got this error, Once this error came almost all times same error repeat while communicating, Still, i could get the Proper solution for this, and also cause for this error, I have searched In digsi manual
But nothing mentioned regarding Comtask32. All the minor checks – All seems okay
– Problem in siprotic 4. I’m using software 4.93
– then you have to reinstall your windows as well digsi.
– I’ve faced this issue in different laptops / different os too.

– How could we check trip log and event log in IED Scout in siemens Siprotech Relays
– What is the type of this FO port, please?
– LC/SC/ST like this?
– LC
– these two please?
– LC
– SC
– The above relay has FO LC type rear ethernet port and its protocol is IEC60870-5-103. Will it support time synchronization with SANDS make GPS ?
– Abb rec670 relay restarting again after double point status included. Does anyone know how to solve this restarting issue please send me a message
– This change is in the 61850?
– No just changed binary input status
– What will be the default password for GE L90?
– It is showing local access denied while changing settings from HMI. I am getting this error when I send application configuration to the relay REF 615
– I can able to read but not able to write what will be the reason!? please anyone who knows how to solve this issue message me.
– Can someone help me to configure this relay ABB REF 541?
– Breaker feeding primary of 6.6/.415 kv transformer is tripping on earth fault during inrush
– 6.6kv is grounded through 50 Amps NGR
– 51n is set at 10 amps idmt at 200 Msec
– 50n is set at 20amps dt at 50 msec

– Please guide for the 68 settings in ABB ref 615 relay
-It’s tripping on Earth fault Highest function?
– Earth fault’s highest setting may be less. We keep it as 8-10 times of idmt setting. For example, if CT is 600/1A, then earth fault highest function is kept at 2A (10 times of 0.2A)
– anyone having a thermal overload calculation sheet for the transformer kindly shares
– Transformer testing

– Please tell me What is the use of the rings in the above Voltage Transformer?
– Any sip5 engineer who knows to change the phase current name for DR?
– Hi everyone I am facing this problem for ABB615. Whenever I gave the read from IED that time showing this error.. – — How can I solve those errors and read relay files from the relay?

-Anyone pls send me the ABB REF615 Relay version 5.0.13 relay connectivity package
– Use and update manager or go to their website
– The updated manager has no option for searching
– Kindly update the license by right click on the relay and use the license updation tool.
– Please, can anyone help. CB always trips back after single-phase Auto reclose. The PD is the 60s
– Kindly make it clear?
– After the relay give AR command to the CB it will close and trip back immediately and after that, the CB will trip other phases on PD. I’m doing commissioning the line, not charge
– Here showing option 5.0.1. But I need 5.0.13. how can I download the package
– Did you check for any trip signal presented to the single-pole trip relays?
– Yes. The feedback is on the relay to test set.
– Breaker should be in a close position for AR
– In the open condition, AR should block
– It was in a close position and I trip the CB with the relay on 21Z1 Ph-G fault. Then CB open and the relay send a reclose command

– Did you check the outputs which are getting high on single-phase trip?
– I have checked it very well because the test kit shows the duration of the trip. About 0.038s
– No other outputs are getting high?
– Yes
– Disable TOR function and then check
– TOR?
– Trip on reclose function which is there in every numerical relay
– Disable this function and then check the auto reclose
– Correct CB state must be provided for the AR relay/21 for AR to work. As I understand AR will work if the CB is open, not when it is closed, along with other interlock conditions.
– The problem is that the CB is reclosing and trip back immediately, Which means some trip signal is tripping it. it’s not the ar logic which is at fault.
– You need to remove the particular phase’s trip input to the single-phase trip relay and then try a reclosing function test.
– If it works, you are going to find out which relay keeps issuing the trip positive to the 1 phase trip relay.
– If you reclose the CB from the AR function of the relay, the CB close and remains. If there is an output that is high it should not stay
– That’s the logic.
– The problem happens only when I trip the CB from Close to open and back to close?
– You can check also a timer on CB for pole discrepancy.. sometimes you need to delay more for reclosing test.
– That s a basic check. make sure that the dead time is not more than the reclaim time & PD time. Even though as per your description it’s not what trips the CB on reclosing.
– Adjust timer on CB after that reclose successfully signal to come.
– If it’s a new CB, after conducting the CB closing timing test, set the deadtime above the closing time of CB too.
– it’s a new CB
– Normally, the closing time is 100msec and the dead time is set as 1sec. Remove other 2 phases trip relays and then apply single-phase fault with one trip relay. Check if AR works
– Keep one trip relay in circuit with other trip relays drawn out
– Suppose you apply Red phase fault, keep the red phase trip relay in the circuit
– If others are there definitely it will trip the CB on 3Ph
– That’s what we are doing
– you apply Red phase to the earth fault using the testing kit and keep Red phase trip relay in the circuit
– Have you checked that Breaker is closing on Single phase fault AR and then tripping? If others are active the relay will show TrpA, TrpB, and TrpC
– it’s closing on ar, but again tripping on single-phase trip relay, And later due to PD timer, remaining phases trip too
– You said that it’s again tripping on the Trip relay. Check the Auxiliary contact 52A of the circuit breaker which is in series with the trip coil. This contact can malfunction. This contact is meant to break the DC circuit of the Trip relay
– If the trip relay remains in the energized state it can again trip the breaker

Join 20 WhatsApp groups for protection engineers

20 WhatsApp Groups for protection engineers

  • WhatsApp Grp 01: Protection Relay – General
  • WhatsApp Grp 02: Substation Automation – General
  • WhatsApp Grp 03: Transmission line protection
  • WhatsApp Grp 04: Transformer protection
  • WhatsApp Grp 05: Motor protection
  • WhatsApp Grp 06: Generator protection
  • WhatsApp Grp 07: Overcurrent and Earth Fault Protection
  • WhatsApp Grp 08: Busbar protection and Bay controller
  • WhatsApp Grp 09: Breaker protection and control
  • WhatsApp Grp 10: Protection Relay Testing and commissioning
  • WhatsApp Grp 11: DIgSILENT
  • WhatsApp Grp 12: ETAP
  • WhatsApp Grp 13: PSCAD
  • WhatsApp Grp 14: IEC 61850 configuration
  • WhatsApp Grp 15: Switchgear GIS & AIS
  • WhatsApp Grp 16: GE Relay Configuration
  • WhatsApp Grp 17: SIEMENS Relay configuration
  • WhatsApp Grp 18: Schnider Relay configuration
  • WhatsApp Grp 19: SEL Relay Configuration
  • WhatsApp Grp 20: ABB Relion configuration or more services, send a message to our WhatsApp support number: +989129613659


– Electric duct heater 240 volts, 3500 w what are meggar valves
– This would not lead to a successful Autorecloser.
– If the CB aux switch s faulty and a trip signal persists, the TC will get burned out.
– Yes, the trip coil can burn
– But I don’t find any other reason. I think they need to check trip coil resistance too,
– As the coil has not burned, it’s not the CB aux switch that s causing the issue.
– Can we extract fault waveform, I mean one more thing needs to be checked: the testing kit needs to stop injecting fault after the first trip, is it being ensured.
– Correct! And if the kit feedback point of the trip is correct.
– Yes I confirmed it. It shows 0.038s
– If you remove feedback the test kit continues
– Check the Programming logic of the relay, maybe Autoreclose digital output signal may have been connected to the trip output contact of Relay
– Check the PSL or configuration of the Distance relay. I have only a three-phase supply without neutral, in my system newly 1 phase loads are being added. how can I provide neutral wire to these loads, without implementing any Trafo (Delta-Wye)?

– Hi guys. How Can I reset these ledes?
-Reset, then reset indication LEDs, Check the BB switch if it’s on or off.
– I did it but it doesn’t work.
– Where can I find BB switch?
– On the same panel
– This is the sepam Relay s configuration,

– Why we are using () In not gate function. is it mandatory to use the set brackets?
– Not Required
– If u Want to Invert an Input, U Can use NOT directly. So set brackets Were not important, right?


– What is the meaning of this error code, please? p343
– This error code means that analog input module serial E2ROM Failure.
– We advise replacing analog input module through authorized repair center.

– Anyone knows how to trigger DR in sip 4 either online or manually?
– Open relay online and go to test then double click on test waveform, DR will be triggered.

– HMI in LabView with IEC 61850 (MMS) Communication
-It’s just a simulation or HILT ( LOOP IN TESTING)?
– First I configure the SEL 751 in QuickSet software, then I use the SEL Architect software for IEC 61850 configuration, in the end, I use the RELAB OPC SERVER software to read the reports I created and the software transforms them into OPC signals and the LabView can read that data in real-time. You can also use Kepserverx to transform MMS or GOOSE data to OPC
– Value under switch on condition means in case of differential

– I have good knowledge of digsi4 but no knowledge of digsi5 software. Anyone have any guidelines to access digsi5. I need to see how the signal is configured for SAS OR GOOSING.
– Actually in 5 no need to assign any signal for IEC all are pre-configured
– In the file, there is the option of IEC structure …on that, you can see

– Anybody Simulated signals from IED SCOUT???
– This block “MVGAPC1” used for SAS in the REF615, but I don’t need it to appear on the events

– can anybody tell me the difference between short-term overcurrent trips and long-term overcurrent trips?
-What is the password of SEL 551?
-Try TAIL Or OTTER
– Sometimes the password for ftp might be FTPUSER too. If you have quickset settings, you will get the information in it

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-Does anyone face time inaccuracy in OMICRON CMC256 only if trip time < 1-second?

-What are you testing?
-Phase Overcurrent.

– What are you using? Quick CMC, state sequence, or auto?

– We use a 125V DC system for our substations. The string consists of 93 NiCad cells. The charger is SENS. The only settings available on the charger are FLOAT, set at 1.37VpC 122V, and EQUALIZE, set at 1.57Vpc 138V. These values appear to be assuming the string consists of 88 cells.

– Should I just adjust the FLOAT to 130V?
-I don’t see any way to set the number of cells in the string.
-How separate furreol in canon mk2600 printer?
-Anyone worked on Micom 546 relay. Line differential relay? I am facing one problem that the tx of differential communication getting on-off frequently in back relay tx is getting
on-off, or in your mux, In HMI of relay
-Value is getting 1 and 0.
-maybe you can check in measurement 4 in display relay, same or not with tx on HMI.
-What is the password of this relay SR-489?

-The factory default passcode is zero (0)

– Also, you can try state sequence.

– just an update Was able to find in the setting where there is the number of cells for the string but was not allowed to change the value which was found to be 93.
-we Will try to contact the manufacturer to address this.

– What’s the difference between WCDM11 type relay and WCD type? Both are reverse power protection relays but can we interchange them?
-how I install Digsi 4 in windows 8 or windows 10?
-Hi the above relay SIEMENS show the error LED and monitor SMS.

– can you help me to solve this issue? Busbar relay 7ss52?

– Actually, it falls back in monitor mode ….go down there will be one option of reset ….do that.

-Yes. Otherwise, nothing will show in time

-hi, could anyone shares PDF standard library “IEC 60255-6 ELECTRICAL RELAYS -PART6:MEASURING RELAYS AND PROTECTION EQUIPMENT”?

-Does anyone have a manual for this relay or how to read the settings for this relay?
– Which relay?
– Micom p444
– Once ..switch off auxiliary suplly And switch on


– I have a question about inrush on the Transmission line:

– Is it inrush current created during energizing of under-ground transmission line? On voltage level of 132kV and 6.5KM
– No, inrush current produces during charging of transformer.
– Anyone have Rio file for field failure and pole slip
What is the default password of this Siemens Relay?


– Anyone has a 3.61 data model for this relay?
– 000000

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– Why u need To communicate and see Fault Recorder
– I think It can be used HMI only And Modbus communication ports only available
– Ok. That is also ok. I can use that only as long as I have respective firmware.

– Guys anyone has this book?! Can anyone upload it??
– Transformer Inspection and Testing (Electrical Power Plant Maintenance Book 1) pdf

– Hello anyone works this type of MDB ?
– This is not MDB. look likes the control panel.
– Sir Are you work on this panel ?
– Looks like ifsc and Rtu panel
– Please send link go to download TDMS software for DRTS 64 testing kit

– Hi does anyone have MComp suite software of L&t relays?

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– could you please share apart from ABB/Siemens/GE/Alstom/SEL relay do you come across or experienced any GOOD protection relays
– Ashida also good protection relays
– yes, heard some products are approved in UAE
– ASHIDA’s presence is there in UAE, Kuwait, Oman, KSA in the Middle East.

They Have all Types of Relay & Controller?
– Anyone Dealing with Smart Grid Controller?
– eXP / REF601 is a feeder protection relay for protection and control Feeder protection and control (Numerical relays)
– ABB REG 670 Gen protection
RET 670 t/f protection
REL 670 line protection

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– Please find the attached document which reflect the contents that we will – ETAP LECTURE SCHEDULE.pdf

– Anybody can guide me about,zero-sequence current?
– I have only phase CT and residual connection.
– If no CBCT available then I0 how I can take it in line.
– What equipment, and Model?
– L&t ACB Breaker and mm10 relay.
– You have required to give the settings of measured earth fault protection in the relay, so by residual connection io directly come into line.

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– Anyone knows how to check the capacitor with a multimeter
– CHECK THE AMPERE ON EACH PHASE IF IT IS HEALTHY IT WILL SHOW AMPERE ON EACH PHASE RESPECTIVELY… IF PHASE SHOWS ZERO AMP THEN IT IS DAMAGED

– Can anyone helps to identify, in actual what is the main fault? It occurs from last week
– master and o/c & E/F fault relay trip. And Simultaneously line Side SF6 breaker trip
– We have 9 MVA, two power transformers in 66 kV Switchyard Fault occur only on transformer 1 and only line Side SF6 breaker trip, I don’t understand this?? Please help
– O/c & e/f I think backup protection for short circuit or internal faults inside the TR.. check your protection scheme to understand further.
– all I can tell u is, it may be a heavy imbalance in the loading of the line. if it occurs once in a while & goes away… please note this & revise your settings through relay coordination.

– Anyone here, who can tell me about solenoid?
– Like this one solenoid
– Our Switchyard SLD, also incase SF6 breaker out of 3 poles 1 pole does not get close ( remains open). Kindly check this out.
– PTT-20201021-WA0000.opus (file attached)

– On my site, 33kv ht cable IR values are R=60 megaohm, Y=1 gigaohm, B =1 gigaohm. Please give suggestions if energies the cable.
– How much voltage injected into the cable?
– 1000 volt

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– Try to inject 5kv. From my experience, If you got the same value you can charge the cable.
– 60 megaohm is acceptable if I injected 5kv.
– If is it possible to keep the cable in sunlight, then conduct IR you can get better value.
– I had charged the 11kv bus when I got cable IR around 10 M ohm.
– Clean the cable jointing kit perfectly, then means if you find any carbon in cable termination. IR value can also improve by doing this.
– Around 1km cable laid
– I Am not saying to clean all the cable. Just clean only the HV Termination kit.

– If it is possible to try to do a route survey also as per standard minimum of 100 megaohms is required?
– Use a blower to heat the termination side it is ht sleeve

– Can anyone tell me the difference between the Hipot test and the IR Test of cables??
– In the Hipot test, we check magnetic earth leakage current. In IR test check cable insulation.

– the procedure in the Hipot test if it’s 11 KV we have to apply 28 kV for 1 minute and measure the leakage current in Milliamps, in IR test we have to use 5 KV DC Megger and measure the resistance in megaohms

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– Why it is 28kv? why can’t we measure with 5kv?
– The Hipot test formula =80%((2*rated voltage) +1kv)
– In the formula, it’s not coming 28 kV
– For your understanding, I send the Hipot test voltage of switchgear as per standard, for differentiating Hipot and IR Test.

– How to increase normal current from 0.4 to. 08 by ABB REJ501 relay?
– Ct ratio 125/1 amps
Now want to change .4 to.8.

– Hi anybody has an idea how to calculate the THDi from my current measurements Without the use of a Multifunction meter?

– Why impedance correction factor is needed for short circuit analysis
– anybody used line differential relay 7SD8021? Please share the setting details.
– where this relay is used?

– Please I need a Test Report Format for REU615 as a Synchronization Relay

– Any one can help, this contactor is not on that’s why my motor not on…..any possibility


– Underground cable testing procedures.
– Check the coil and auxiliary contacts, check control supply and main supply

– I working on a 66/33 kV substation plant trip due to the VT fuse failure alarm. How to troubleshoot VT fuse Failure alarm?
– Please check the relay configuration. VT fuse fail should not go for tripping only for alarm need to be configured.
– Check the fuse may be broken, and I have also faced the same issue.
– Here alarm command parallel-connected master trip relay.
– It should give only a fuse fail alarm, but it should not give tripping signals.
VT fuse failure relay

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– what is the use of short circuit analysis in relay setting calculation of a line or transformer? Why, because line settings are mainly calculated from the line impedance only not on short circuit data & similarly for transformer relay setting also from Transformer MVA & Tap setting are mostly needed.
– What is the contribution of short circuit analysis to distance relay & differential relay settings?
– what will you find when visiting a power station, green building, and Fiber optics factory!

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– What are the Commissioning procedures of HV/EHV types of equipment and different types of tests required before and After Energising the new lines/feeders, Transformers/Reactors?
GROUPELEC_ENG.pptx
856: You’re welcome for any request
Rai: Anyone has Siemens Step 7 smart software?

– Can anyone share the Commissioning and maintenance of the electrical power system by Keith Harker?
– what are the disadvantages of VFD?
it reduces the life of other components like cables transformers, etc. conducts harmonic studies as per IEEE 519-2014, and finds out the solutions. if it exceeds the limits prescribed in the standard then go for a filter

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ETAP has been designed and developed for engineers to study different aspects of power systems in one integrated package.

This course is structured into 4 chapters, with theory and practical examples. It is designed for protection engineers to understand the power system, short circuit concept, protection, and coordination.

Chapter 1- part 01: This part overviews different tools in ETAP with an example. ETAP offers a suite of fully integrated electrical engineering software solutions including load flow, short circuit, protection and coordination, harmonic analysis, transient stability, cable ampacity, arc flash, optimal power flow, and more. Some of these tools may not be required in our study. So we should know which part is the most important tool for us. This part overviews different parts of ETAP before starting the course. In this way, we can find the main tools and parts which we should focus on.

Chapter 1-part 02: This part has an introduction to ETAP software. We start with creating a new project and explain different toolbars and menus in ETAP.

Chapter 1-part 03: This part overviews the main parameters of a busbar, 2 winding transformers, and 3 winding transformers.

Chapter 1-part 04: This part overviews the main parameters of a transmission line and cable.

Chapter 1-part 05: This part overviews the main parameters of a static load, lumped load, and power grind.

Chapter 2-Part 01: This part shows how to study parameters with load flow analysis. To do so, we run a load flow analysis on a simple one-line diagram and study the effect of different parameters.

Chapter 2-Part 02: This part overviews load flow study case and plot option settings.

Chapter 2-Part 03: This part presents a practice to understand the parameters of load, equipment cable, busbar, cable, and transformer deeply. Then it presents load flow and load analyzer tools.

Chapter 2-part 04: This part overviews the main parameters of low voltage circuit breaker and high voltage circuit breaker.

Chapter 2-part 05: This part overviews the main parameters of an induction machine and how to model an induction machine in three different methods.

Chapter 2-part 06: This part overviews the main parameters of a synchronous generator.

Chapter 2-Part 07: This part presents a practice to understand the parameters of an induction machine and a synchronous generator deeply.

Chapter 2-Part 08: This part presents how to remove the critical alarm. To do so CB overload, cable overload, and transformer overload alerts have been removed. To remove these alerts, we should know how to do cable sizing and transformer sizing in ETAP.

Chapter 3-Part 01: This part shows the effect of different parameters in the short circuit current. An induction motor can inject current to a grid even more than an equivalent generator, this part show this concept in ETAP.

Chapter 3-Part 02: This part explains the settings in the short circuit analysis. To explain the parameters of short circuit analysis and understand the short circuit modeling in ETAP, we have simulated an AG fault in PSCAD.

Chapter 3-Part 03: This part presents several duties and tools in short circuit analysis mode.

Chapter 4-Part 01: This part overviews the elements which are related to relay protection and coordination.

Chapter 4-Part 02: This part shows overcurrent parameters in ETAP and relay configurations software. The setting of overcurrent relays (P121 and distance relay SEL 421) are shown in the configuration software (Esergy studio and AcSELerator quick set software).

Chapter 4-Part 03: In this part, three-phase voltage and currents are injected into the SEL 421 with a secondary test kit (Omicron CMC 256) to explain the values in a relay and test the intravenous overcurrent function.

Chapter 4-Part 04: This part presents how to CT ratio and time delay overcurrent element (Ansi 51). Then the coordination between two relays is explained with the help of start view tools.

Chapter 4-Part 05: This part presents the coordination between three relays and how to test the coordination with the help of the sequence viewer tool.

Chapter 4-Part 06: This part explains the plot option parameters in the Star View.

Chapter 4-Part 07: This part explains how to set instantaneous overcurrent parameters (ANSI 50).

Chapter 4-Part 08: This part presents how to calculate overture ground elements in ETAP and how to set these parameters in the relay.

Chapter 4-Part 09: This part presents how to add a proper fuse to a feeder and coordinate the relays with the fuse.

Chapter 4-Part 10: This part explains the protection page of the main elements and how to protect an element with an overcurrent element.

Chapter 4-Part 11: This part presents helpful tools in the protection and coordination study room.

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