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DIGSI 4, 7:07 mm: It’s not minus just a dash
DIGSI 4, 8:07 AM X6: I Think minus… ok.. I’m quit confused 😃
DIGSI 4, 8:11 K5: Bro kindly check OTI – 85 deg alarm, 95 deg trip. & WTI alarm 95 deg alarm, 105 trip…
DIGSI 4, 8:13 K5: WTI temp indicator always showing higher than OTI temp indicator…
DIGSI 4, 9:09 AM – kk 1441 Prakash Gunasekaran: Yeah ur absolutely correct 👍
DIGSI 4, 11:15 AM – AA 8547 Jaydeep Karia joined using this group’s invite link
DIGSI 4, 4:26 zz1: Can anyone tell me the price of digsi 5 license in Indian Rs…..?
DIGSI 4, 4:50j1″: Thank you sir
DIGSI 4, 6:50 mm:
DIGSI 4, 8:35 PM X5: Dears,Anybody know basic working difference of REF in autotransfomer besides from REF in conventional transformer?
DIGSI 4, 8:40 X24: We have 110kv CT it dose not produce secondary voltage under 110kv voltage or during stability test but during current injection by tester it give proper secondary current what we’ll be the reason any reply?
DIGSI 4, 9:55 AM X6: What is the mechanical protection for breaker???
DIGSI 4, 11:23 XX4: How much range voltage will be use?
DIGSI 4, 2:37 X2: can anyone share the demo PCM600 file with Graphical Display (SLD) ????
DIGSI 4, 2:38 X2: i want to create graphical display on my abb relay
DIGSI 4, 4:38 XX:
DIGSI 4, 4:39 XX: Anyone know why we are using this diode and what is uses
DIGSI 4, 5:08 PM X2: Polarity change ie +ve -ve , it wont allow to pass thro circuit , I think
DIGSI 4, 5:10 PM X2: During c/o and avoid short
DIGSI 4, 5:12 XX: Whenever you can give interview and you have answer properly and u r not selected for this job so what is the reason behind that
DIGSI 4, 8:11 XX: Further addition to above –
1). Normal Diode allows current to flow in forward bias .
2). Zenner Diode allows current to flow in reverse bias only .
DIGSI 4, 8:18 XX80: Two phases show negative values but one phase show positive values .
DIGSI 4, 8:18 XX80: How ??
DIGSI 4, 8:29 AM X6: What is the wifi password for CMC356? Thanks in advance.
DIGSI 4, 8:51 X7: Any one have omicron template file for out of step protection in simens generator relay
DIGSI 4, 9:03 XX4: Depend on load, my you tray to tracing 3 line diagram until load (wiring internal of load equipment)
DIGSI 4, 9:03 XX4: Tray=try
DIGSI 4, 9:03 XX4: Depend on load, may you try to tracing 3 line diagram until load (wiring internal of load equipment)
DIGSI 4, 9:16 XX4: Wifi?
DIGSI 4, 9:33 XXX9: If the vts at 3phases exposed to fault what is the over current protection behaviour on this circuit?
DIGSI 4, 9:39 XXX9:
DIGSI 4, 9:43 XXX9: If all the electrical protections failed at substation and just the physical protection operate what is the problem on this substation?
DIGSI 4, 10:06 XX: Hi folks ,Can any body clearly explain me –
1), how we can detect CT saturation in case of Low Impedance Relays?
2). Why is it essential to detect CT saturation only in case of low impedance Relays ?
DIGSI 4, 10:08 XX: I need proper to the point response ( no white paper / presentation please ) for my proper understanding this CT saturation detection techniques.
Please help
DIGSI 4, 7:00 XX4: Thanks bouhamidak for those very usful dacuments, we are waiting for such dacuments for relay testing like differential and distance etc.
DIGSI 4, 1:08mx: This message was deleted
DIGSI 4, 6:54 X2: Hello everyone I have following doubts can any of you clarify?DIGSI 4, 7:30 XX:
DIGSI 4, 9:02 X2: Lets suppose LV side of Transformer is open and HV side is connected to source…. And if we ooen the source side CBs, is there any possibility of tranformer tripping on differential protection?
DIGSI 4, 9:39 X5: Please share this data.
DIGSI 4, 9:39 X5:
DIGSI 4, 9:39 X5: For 400kV Substation I would like to learn substation design.
DIGSI 4, 9:41 X2: These data will be in project specific drawings. Will be difficult but Will try to send.
DIGSI 4, 9:43 X5: Thanks for your support.
DIGSI 4, 9:46 PM – X8: Can any one tell about 400kV Busbar protection type..? Please
DIGSI 4, 9:47 X5:
DIGSI 4, 9:51 PM – X8: Thanks
DIGSI 4, 9:58 PM – X8: What is main Function of CSD relay..
DIGSI 4, 10:12 XX: Controlled switching device (either implemented using a point on wave device or pre insertion resistors in circuit breakers) helps achieve switching at either voltage zero or current zero (depending on the equipment to be switched) for instance a capacitor bank you would switch at voltage zero whereas for an inductor you would switch at current zero.
CSD is typically applied in long transmission lines, filter banks or converter transformers.
DIGSI 4, 10:14 XX: By using CSD in the above cases it helps to prevent switching overvoltages or high inrush currents in the transformers.
DIGSI 4, 10:16 PM – X8: Can I use it for Breaker controlling..?
DIGSI 4, 10:17 XX: Basically that’s what it does it controls the breaker to close or open at a certain point on the current or voltage waveform.
DIGSI 4, 10:20 X8: Ok.. thanks bro..!!
DIGSI 4 1:11 X24: Hello everyone,
Anyone can help to share your manual commissiong of T3000 DCS system.
I would very appreciated it.
DIGSI 4, 2:51mm: Hello everyone;
For EHV (400kv and 132kv) resonance test which kind of partial discharge devices can be used? There is an specific omicron product can be used?
DIGSI 4, 2:53 PM – X8: What is main purpose of reactors in Power grid.??..can anyone explain…
DIGSI 4, 2:55 XX: Used for Reactive power compensation and to reduce Ferrantic effect
DIGSI 4, 3:35 X24: Reduce THD also
DIGSI 4, 7:31 KK3: THD mean
DIGSI 4, 7:32 AM IEC: Total harmonic distortion.
DIGSI 4, 7:32mm: Maintains Stable voltage profile by reducing ferranti effect
DIGSI 4, 7:41 mxx: Has anyone worked on SEL scada?
DIGSI 4, 8:19 XX8: Additional clarifications – Sometimes, in the system, Tuning is required to balance the system Capacitance with System Inductance , so that Electrical Resonance does not take place.
System capacitance can be generated due to the long length of cable, Busducts, NERs , etc.
DIGSI 4, 8:22 mxx: Anybody have relays list and their operation in a single document. Kindly share here or
Please mail me at
DIGSI 4, 8:23 yy8: Please I also need at
DIGSI 4, 9:40 X7: Any one suggest me what is problem …. When 3 transformer operated in parallel but one of transformer tapping going to 15 no. Means mostly vary
DIGSI 4, 9:42 X7: Please give response
DIGSI 4, 12:22 X2: What is the purpose of node VT
DIGSI 4, 12:23 X2: Inside GIS
DIGSI 4, 2:05 X2: It’s 500kV??
DIGSI 4, 2:05 X2: Sld
DIGSI 4, 2:08 X2: In 400kV or above voltage in line bay PT is also used.
So this node PT is considered as line PT
DIGSI 4, 2:13 X24: May be his asking what is the function of Node VT in SLD installed.
DIGSI 4, 2:15 X2: I believe this PT is used for high metering and protection purpose at 500kV
DIGSI 4, 2:15 X2: Yes function of node VT in 500 kV GIS
DIGSI 4, 2:16 X2: Protection and metering at line side incomer
DIGSI 4, 2:16 X24: please see also of another VT in here
DIGSI 4, 2:17 X2: At each bay
DIGSI 4, 2:17 X2: Line and ATR
DIGSI 4, 2:20 X24: or this is considering for differential protection?
DIGSI 4, 2:20 X24: try to find secondary wire…😅😃
DIGSI 4, 2:21 X2: I think this is right
DIGSI 4, 3:36 PM – kk 1307 Shahzad Hashmi: Synch + OV Protection in EHV system
DIGSI 4, 3:49 PM X5: As a voltage synchron check
DIGSI 4, 4:31j1″: Guys, If you know Schneider Vamp relay Thermal Overload Protection (49) then please tell me about formula & How to calculate tripping time….
DIGSI 4, 4:34 mm: Hi can any knows thermal rating of circuit breaker how to calculate or is it available in o&m ?
DIGSI 4, 10:02 mxx: Hello everyone, I need to send a signal called maximum current to Scada system In ABB REL 670 IED
DIGSI 4, 10:03 mxx: What’s the function of this signal. And how it’s work
DIGSI 4, 1:39 XXXX: Hi Boss, for board MIM13?
DIGSI 4, 3:29 XX: How to calculate 1ph & 3ph pickup for T60 relay
DIGSI 4, 3:55mxx: Better refer T60 Manual. Formula given to calculate 1ph and 3 ph pickup
DIGSI 4, 3:56 XX: Not available
DIGSI 4, 3:56mxx: Check GE website
DIGSI 4, 3:58mxx:
DIGSI 4, 4:14 PM IEC:
DIGSI 4, 4:14 PM IEC: This message was deleted
DIGSI 4, 4:15 PM IEC: For GE T60(Calculation) ☝🏻
DIGSI 4, 5:05mxx: 🤝🏻👏🏻👏🏻👏🏻👏🏻
DIGSI 4, 5:05mxx: Thanks for sharing
DIGSI 4, 6:00 X24: Grounding Rod
DIGSI 4, 7:49 XX: What is the difference between Earthing transformer and NGR??
DIGSI 4, 8:04 X2: Earthing transformer is used to provide grounding to the ungrounded electrical system or delta connected system.
Whereas NGR is a grounding system, which is used to limit Earth fault current at certain value.
DIGSI 4, 8:05 PM RR5: Thank you
DIGSI 4, 8:12 XX: This message was deleted
DIGSI 4, 8:13 XX: Where it is used widely??
DIGSI 4, 8:15 X2: It is used for Generators, motors. Means wherever rotating machine are there we can use NGR to limit the earth fault current for preventing stator core to get damage.
DIGSI 4, 12:03 mxx: NGR is neutral grounding reactor. It is used to cancel the capacitive current during fault. It’s effective in single phase fault, when fault occurs on one phase and capacitive current flows from normal phases. NRG causes reactive to neutralize the capcitive Current from healthy phases.
DIGSI 4, 3:34 XXX5: Can anyone let me know how to monitor the I/O IN CFC online mode the actual values in CFC
DIGSI 4, 3:34 XXX5: Siemens relay
DIGSI 4, 3:36 XXX52: Hi Boss, which logic do you want to monitor?
DIGSI 4, 3:43 XXX5: Any logic I want to monitor the actual IO values
DIGSI 4, 3:43 XXX5: Same like in MICOM
DIGSI 4, 3:43 XXX5: So want to see the values in SIEMENS CFC logic
DIGSI 4, 3:44 XXX5: Watch ON in Siemens software is not activated
DIGSI 4, 4:11 X7: Resistance or Reactor??
DIGSI 4, 8:35 AM X6: Resistor
DIGSI 4, 8:38 mxx: Reactor….
DIGSI 4, 8:53 X7: Still no confirmation
DIGSI 4, 8:56 mxx: Resistor and reactor both different components, reactor is basically used on long TX lines where single phase tripping is allowed.
DIGSI 4, 8:59 AM X6:
DIGSI 4, 8:59 XX4: For controlling fault current of very low magnitude, a resistor should be chosen. However, where you need to limit the fault current of magnitude of thousands amps, you must choose a quality power reactor.
DIGSI 4, 12:09 PM X5: Anyone have Micom P632 Data Model Manager?
DIGSI 4, 12:51 PM X5:
DIGSI 4, 1:02mxx:
DIGSI 4, 1:02 X2: You can download from Internet
DIGSI 4, 1:02 X2: Or you can extract from relay itself
DIGSI 4, 1:03 X2: It is better to download latest version and try to download since server is changed after will not allow to download from Internet
DIGSI 4, 1:05 PM X5: How to do this Sir ?
DIGSI 4, 1:05 PM X5: I ve tried, but it took quite a long time
DIGSI 4, 1:11mxx: I agree. Normally when internet isn’t fast enough you experience this
DIGSI 4, 1:18mxx: Inbox me your email I try to send the one I have may be it will help
DIGSI 4, 2:32 X2: Open your file in Easergy studio and you find extract data model from device
DIGSI 4, 2:35 X2: Pl try to download only the required data model (Under P632 you have to expand using +symbol to see the available version)
DIGSI 4, 2:51 oo0: Could someone pls share IEC 60255-151 document
DIGSI 4, 4:33KK: its neutral grounding resistor.
DIGSI 4, 4:49 XX: NGR is never Neutral Grounding Reactor .
It is always Neutral Grounding Resistor (NGR). NGR is installed to a) limit the earth fault current below the full load current of transformer/ Generator to protect its lamination
b). This earth fault current must be greater than the capacitive current in the system (generated through the Bus-ducts,cables ) so that Arcing fault doesn’t take place across the NGR .
In case of any doubt , please call me 🤙.
DIGSI 4, 4:59 X24: Resistance and Reactor are resistor…😀
DIGSI 4, 5:00 XX: NGR is Neutral Grounding Resistor .
DIGSI 4, 5:00 X24: Yes of course
DIGSI 4, 5:01 XX: Is it ckear now ?
Why so much doubt on this well known topic ?
DIGSI 4, 5:01 XX: I think someone else might have confused this issue
DIGSI 4, 5:05 X24: Poin of my view, This is talking about current fault, and how to maintenance earth fault.
DIGSI 4, 5:10 X24:
DIGSI 4, 5:12 X24: Or we can disable 50/51N for floating G Line. Used OCR and Unbalance relay. But depend to system.
DIGSI 4, 5:56 X2: Anyone having idea regarding AVR installation at Wind TG. Can we use AVR for voltage regulation at wind TG end.??
DIGSI 4, 5:59 PM – X3: Hello everyone
Does anybody have the relay testing handbook by “chris werstiuk” collection?
DIGSI 4, 6:06 mxx:
DIGSI 4, 6:07 mxx: I am telling u about the TX line case…. Check it out….
DIGSI 4, 6:08 mxx: We have been facing lot of problems regarding its selection and I gave up the crusk of NRG…. Keep in mind the TX line case. Thanks
DIGSI 4, 6:12 X2: 👍🏻👍🏻

4, 10:23 X24: Arragement code
DIGSI 4, 10:24 PM – kk 1307 Shahzad Hashmi: Designations
DIGSI 4, 11:04KK: is this primery and secondary of ct nd pt respectively?
DIGSI 4, 4:31 mm2:
DIGSI 4, 12:39 PMmg4:
DIGSI 4, 12:40 PMmg4: How can I download the siemens 7ss52 drivers as nothing shows in download link
DIGSI 4, 12:48 PMmg4: As nothing is there in download link
DIGSI 4, 1:17 zz1: Hello everyone
Having some problem in Generator
In my company having 14.24MW generator
Generator rotor resistance is changing continuously from 20 to 60 Kohm
DIGSI 4, 1:17 zz1: What would be the reason behind it?
DIGSI 4, 1:18 zz1: Because of this rotor earth fault stage 1 operated because the setting is about 25kohm
DIGSI 4, 1:19 zz1: We also measure the current in earthing cable which is connected to rotor shaft with slipring
DIGSI 4, 1:32 X24:
DIGSI 4, 1:33 X24: Temperature also changing ?
DIGSI 4, 1:38 zz1: Not measured
DIGSI 4, 1:40 X24: Resistance related to isolation, isolation related to temperature
DIGSI 4, 1:52 PM – X2:
DIGSI 4, 1:52 PM – X2: why i am getting these errors after installing connectivity package
DIGSI 4, 1:56 X2: Anyone know how to enable the Micom P841 auto recloser relay Live line live bus synch settings?
DIGSI 4, 2:18 XXXX: Hi Boss, send link:
DIGSI 4, 7:05 X2:
DIGSI 4, 7:06 X2: How to monitor bits in Real time Mode? I have already connected easergy studio with relay but it always give Demo mode option.

we have a site requirement of ” earth fault loop impedance Ze ” .
anyone can guide this test for New MV cables (4.16kV ) , & does it even require or not .
what equipment will be used ?
generally we conduct Insulation / Meggar test & continuity check for newly pulled MV cables.
DIGSI 4, 2:32 X2: I m testing micom auto recloser relay p841…. Can anyone check the sequence states i have been using for this purpose…?
1/18/21, 6:49 XX: Anyone have vamp 259 line protection calculation sheet
DIGSI 4, 11:09 ppi: Facing above error while communicating with bay units
DIGSI 4, 11:10 ppi: But central unit communicated sucessfully
DIGSI 4, 11:10 ppi:
DIGSI 4, 7:44 PMmg4: Please solve the error
DIGSI 4, 6:07 ppi: Please solve the error
DIGSI 4, 6:07 ppi: After complete installing while opening digsi 4.91 icon above threat log is coming
DIGSI 4, 11:26 ppi: Is digsi 4.93 compatible for windows 7 service pack1 32 bit
DIGSI 4, 7:55KK: any WhatsApp group of wind power?
DIGSI 4, 8:02 mm2: I hope so
DIGSI 4, 8:07KK: i want to join wind power
DIGSI 4, 8:13mm2: Me too
DIGSI 4, 8:53 mm2:
DIGSI 4 7:44 XX8: i want to know how to configure AR Block in P841 . I have assigned one output contact and it is continuously high.
DIGSI 4 12:15 XXX4: If you are assigning AR block output contact with AR block DDB then it will remain high as long as the AR func is enabled.
Use your conditions in OR gate for AR block output contact. Not the DDB
DIGSI 4 12:16 PM – X2: This message was deleted
DIGSI 4 1:01 PM – X2: The output is continuously high either function is off or on !
DIGSI 4 1:02 XXX4: Yep i remember. It will remain high. As its the DDB used for other purposes during AR function
DIGSI 4 1:02 XXX4: Use your blocking conditions in OR gate for Output contact, not this DDB
DIGSI 4 2:30 X24: This message was deleted
DIGSI 4 2:30 X24: Hi evereryone..
Anyone can share the prosedure of bump test motor?
DIGSI 4 8:28 X2: In a one and a half breaker scheme, current magnitude from Q1 CB is different from Q3 CB…. Can anyone explain this reason? Line is terminatkng between Q1 and Q3 CB… Also there is neutral current of 40A flowing from these CBs
DIGSI 4 9:22 KK3: alarm is on both governors
DIGSI 4 9:52 XX4: You may should be do to check Fuel Management of that Turbine
DIGSI 4 9:56 KK3: i didn’t get dear
DIGSI 4 9:57 XX4: That look like using PID & Close loop control system
DIGSI 4 9:58 KK3: I am beginner plz elaborate
DIGSI 4 10:02 XX4: You can read the book from library of your Plant..
DIGSI 4 10:02 AM X6: A governor is a system that is used to maintain the mean speed of an engine, within certain limits, under fluctuating load conditions. It does this by regulating and controlling the amount of fuel supplied to the engine. The governor hence limits the speed of the engine when it is running at the no-load condition, i.e it governs the idle speed, and ensures that the engine speed does not exceed the maximum value as specified by the manufacturers.
DIGSI 4 10:05 AM X6: All marine vessels need a speed control system to control and govern the speed of the propulsion plant being used on board, as there can be a large number of variations that arise on engine load, which may damage the engine and cause loss of life and equipment. The variations in the load on the engine may arise due to several factors such as rough seas, rolling and pitching of the vessel, compromised ship structure, changes in weight of the ship among others.

DIGSI 4 10:08 KK3: what could be reason of fuel management?
DIGSI 4 10:10 XX4: And usually for power generation (coupling to generator) also considering the internal turbine/engine/generator/auxiliary condition.
DIGSI 4 10:12 XX4: All speed control system almost using logic gate Propotional Integral Derivative.
DIGSI 4 10:12 XX4: Safety and performance reason.
DIGSI 4 10:14 AM X6: An increase in the load decreases engine speed. In this case, the flyweights move inwards, and that the governor spindle moves downward under the action of the force of the speeder spring. This movement lowers the pilot control valve which directs oil to the underside of the power piston.
As the hydraulic pressure on the piston overcomes the spring force acting on it, the piston moves upward and fuel supply to the system engine is increased. hence increasing its speed. Once the RPM of the engine increases, the control valve rises back to its initial position that blocks delivery of hydraulic fluid to the power piston.
On the other hand, as the load on the engine is decreased and its speed increases, the outward movement of the flyweights under the action of the additional centrifugal force causes subsequent upward movement of the spindle and hence the pilot control valve rises as well. This opens the port such that the hydraulic oil in the system flows to the oil sump from under the power piston through a drainage passage. The power piston then moves downwards under the action of the spring force and reduced hydraulic pressure and hence reduces the amount of fuel supplied to the engine is decreased. This reduces the engine speed and consequently, the forces on the flyweights are balanced once again.
DIGSI 4 10:15 XX4: When operating generator synchronized, speed control mergered with loadsharing control system.
DIGSI 4 10:17 XX4: Internal and eksternal parameter are being calculation to desire of speed the engine/turbine.

DIGSI 4 10:17 AM X6: An Electronic governor provides engine speed adjustment from no-load condition to full load. It consists of a Controller, an Electro-Magnetic Pickup (MPU) and an actuator (ACT) to carry out the necessary speed control and regulation. The MPU is a micro-generator and has a magnetic field. It consists of a permanent magnet with an external coil winding. As shown in the diagram, the MPU is installed above the flywheel teeth and depending upon its distance from the gear teeth or slot, the magnetic field of the MPU varies from a maximum to minimum respectively.
Due to the constantly changing internal magnetic field, an AC voltage and frequency is generated in the outer conducting coil. This AC voltage follows the speed of the flywheel. This is the most important aspect of the electronic control system as the governor controller converts the obtained frequency into a DC voltage signal. It then compares this with a set voltage. The results are calculated by a PID control (Proportional-integral-differential) and finally, the output reaches the actuator which implements the required corrections on the fuel supply to the engine.

DIGSI 4 10:21 AM X6:
DIGSI 4 10:23 KK3: we have 2 generators running in parallel
DIGSI 4 10:24 XX4: Parallel operating shoud be using loadsharing control mode or speed droop control mode to desire speed control of the engine.
DIGSI 4 10:24 AM X6: Yes👍
DIGSI 4 10:40 XX4: Anyway, What are the model of both turbine @923323788237 ?
DIGSI 4 12:05KK: Qingdow manufacturer china
DIGSI 4 12:54 X24: You will see at the logic control realtime/configuration software. That mention deadband value. Then that will answer you question.
DIGSI 4 1:03KK: have you manual of this 505 governor
DIGSI 4 1:29 X2: Almost all types of governors are fitted with a flyweight assembly. Two or Four flyweights are mounted on a rotating ball head that is driven directly by the engine shaft, using a gear drive assembly. The rotation of the ball heads creates a centrifugal force that acts on the flyweights of the assembly and causes them to move outward, away from their axis of rotation. As the speed of rotation is increased and the degree of outward movement of the flyweights also increases, and vice versa and hence the movement of the flyweights depends on the engine speed.
A spring is installed to counteracts the centrifugal force generated on the flyweights and forces them towards their initial position. This spring is known as the speeder spring. The position of the flyweights and their outward movement is transmitted to a spindle (this may be done through a collar), which is free to move in a reciprocating fashion. The movement of this spindle, which forms the control sleeve, actuates a linkage to the fuel pump control and ultimately controls the amount of fuel injected.
DIGSI 4 1:31 X2: Under normal operational circumstances, i.e. constant speed and loads, the control sleeve remains stationary as the force on the flyweights is balanced by the counteracting force exerted by the speeder spring.
As the load on the engine is increased, the speed of the engine reduces and the control sleeve moves downward, as the force exerted on it by the speeder spring overcomes the force exerted by the flyweights.
The downward movement of the sleeve is linked to the fuel control racks such that there is an increase the fuel delivery and thus the power generated by the engine. The force on the flyweights increases with the engine RPM and once again the system comes back to equilibrium.
As the load on the engine is decreased, its speed increases. The flyweights move outward and in-turn the control sleeve moves up as the centrifugal force overcomes the speeder spring force. The movement of the sleeve actuates the fuel pump, fuel delivery is lowered, thus the speed of the engine is reduced and the system comes into equilibrium.
DIGSI 4 2:00 X24:
DIGSI 4 2:00 X24: This file?
DIGSI 4 2:01KK: ok sir bundle of thanks
DIGSI 4 2:06 XX: Hai why we are using checkzone in busbar differencial protection
DIGSI 4 2:06 XX: What is the use
DIGSI 4 2:06 XX: Kindly tell me anyone
DIGSI 4 2:08 XX: Yeah, Good question,I have need about this,Thanks
DIGSI 4 2:13 X24: To avoid any spurious actuation
DIGSI 4 2:14 XX: Can u elaborate it??
DIGSI 4 2:35 X24: Busbar protection leads to complete disconnection of connected feeders.
DIGSI 4 2:38 X24: When one bus, call it A bus fault in feeder, buspro will actuating?
DIGSI 4 3:20 XX: What is meant by Check differential protection??
DIGSI 4 4:17 X24:
Maybe someone would like to simplify
DIGSI 4, 3:02 XX: Hello. I’m exporting the icd file for GE’s L90 but the IED name seems to be exported as template. Anyone knows the reason?
DIGSI 4, 3:04 XX:
DIGSI 4, 3:04 XX: This are the server configurations with the IED name.
1/26/21, 10:38 X7: What are the Commissioning procedures of HV/EHV equipments and different types of tests required before and After Energising the new lines/feeders,Transformers/Reactors??Thanks..
1/26/21, 5:48 PM X5: I need help to analyze this Disturbance Fault Record whether it is due to Lighting or Flash ..🙏🙏
1/26/21, 5:51 PM X5: It was fault on Line Diff and Reclose on Phase R

1/27/21, 12:43 X2: How to calculate CT size for motor hp please suggest me
1/27/21, 5:34 kk2: Hi, I’m Jhon. Someone have information or know some page where I can learn Digsi the last version?
Thanks…I’m beginner
1/27/21, 6:23 kk2: Please share Digsi 4 key
DIGSI 4, 6:33 XX4: No lightning
DIGSI 4, 6:39 XX4: Rarely fault, maybe something climbing at phase R in radius 1,7km ? Or something fault in there?
DIGSI 4, 7:29KK: I have interview in wind power, which topcs should i cover? suggest plz
DIGSI 4, 7:45 X2: Basic all
DIGSI 4, 7:45 X2: Wind geneartion working… Equipment used… How to select site to installed wind turbine
DIGSI 4, 8:32 mm2: According to the average wind speed over the year
1/31/21, 12:48 n22: Can anybody help
How to read REM543 relay and export CID file using pcm 600 tool..
DIGSI 4, 9:22 XX4: Pardon me
Lets join with my group for discuss in telegram.
DIGSI 4, 9:47 kk: Could not join by this link. Can you add me there ? My telegram number is 9962241622
DIGSI 4, 9:47 XX4: Okay
DIGSI 4, 9:48 kk: Thanks!
DIGSI 4, 8:42 xx8: This message was deleted
2/2/21, 6:28 X7:
2/2/21, 6:34 XX4: SNTP Synchronisation Failure Alarm
2/2/21, 12:09 X24: Link for join
2/2/21, 12:38 PM – support team: Protection Relay Discussion Group invitation link :
2/2/21, 1:25 lli: Alstom relay?
2/2/21, 1:34 XX: Ss
2/4/21, 1:06 VVV2:
2/4/21, 1:07 VVV2:
2/4/21, 4:03 XX: Can anyone tell me,What are the tests and other parameters/Conditions to be checked for First time Charging/Energising a lines in Substation??
2/4/21, 4:25 X2: Nice question??
2/4/21, 5:38 X24: Hy, anyone could please to tell me which Hipot device brand/series (for dielectric strenght test) have range 500VAC?
2/4/21, 6:09 mm:
2/4/21, 6:55 PM IEC: mode… ? Online or Offline
2/4/21, 6:56KK: free?
2/4/21, 7:21 X2: Is it free
2/4/21, 7:21 X2: ?
2/4/21, 7:21 X2: How to registered
2/4/21, 7:31 XX: What are the Protections present in 765 or 400kv lines??
2/4/21, 7:39 PM IEC:
2/4/21, 7:39 PM IEC: Default password??
2/4/21, 7:39 PM IEC: It’s urgent..
2/4/21, 7:44mxx: Try 5 or 6 zeros. First try 5 zeros
2/4/21, 7:44 PM IEC: Okay..
2/4/21, 7:45 PM IEC: Thanks
2/4/21, 8:20 XXXX: 000000
2/6/21, 11:16 X7: somebody help me with battery and chargers notes
2/6/21, 11:17 X7: Testing and commissioning kind of notes
2/6/21, 8:36 XX: Which connection it is Yna0d11??
2/6/21, 8:49 X24: Vector Group 11. Star connected HV winding with neutral brought out, auto transformer with 0° displacement. LV winding delta connected leading HV by 30°.
2/6/21, 8:51 XX: Thanks 🙏
2/6/21, 9:04 mg42:
2/7/21, 10:53 X7: Anyone know about virtual zone in busbar protection in twpt bus with two ct bus coupler scheme
2/7/21, 1:43 XXXX:
2/7/21, 1:44 XXXX: 👆🏾👆🏾👍🏾👍🏾
2/8/21, 5:33 xx8: Dear friends,
Kindly any one has SEL drivers send to me on
1, 10:57 mxx: Please help me , I need SAS architecture for siemens relays and RTUs
2/9/21, 5:54 XX: Hi! I thought you might like to read my new article: What is Trip Circuit Supervision (95) protection ? How to implement scheme using Numerical relays ?
2/9/21, 5:56mxx: Thank you
2/11/21, 10:05 X7: Anyone,there in group,who is/are in DEWA,SEWA,FEWA,TRANSCO companies in UAE country??
2/11/21, 2:21 PMmg4: Even after installing the package for rel670 it is not showing in pcm 600

2/11/21, 2:22 PMmg4: Showing only generic id not subtransmission id
2/11/21, 2:22 mm2: Tigre CB 792 over headlines
2/11/21, 2:23 mm2: Protection and automation webinar
/16/21, 10:10j1″: Hi guys…,
If you have any project reference .agsys and .ms1s file then send with differential and distance protection.🙏

Because, I will follow your files. Which will benefit my learning.
So, Please give me support. 🙏
2/17/21, 1:38 PMmg4: Solve the error
2/17/21, 1:38 PMmg4:
2/17/21, 6:57 zz1: Reinstall device driver
2/17/21, 8:02 X2: Please do share sample test format for Harmonic Filters ?
2/17/21, 8:02 X2: Specially to find Q factors for Harmonic Filters
2/17/21, 8:41 XX: Which type of filter
2/17/21, 8:41 XX: Active or passive
2/17/21, 9:41 X2: Active power filter and passive filters both

2/18/21, 11:56 XX: Hello please any document about vacuum contactor
2/19/21, 11:01 ppi: Please solve
2/19/21, 11:07 ppi: How one should start update manager
2/19/21, 12:12 PMmg4: Does anybody has connectivity package for rel650 series
2/19/21, 12:12 PMmg4: For pcm600 ver 2.7
2/23/21, 6:29 x7: Dear guys, If anyone have Moxa UPort 1110 driver software then please send me.
2/23/21, 7:01 zzx: U can download it’s easily available online
2/23/21, 7:02 zzx:
2/23/21, 7:02 zzx: Around 2-3MB software
2/23/21, 7:17 x7: Thank you sir 🙏
2/23/21, 7:18 zzx: U r welcome 👍
2/23/21, 7:19 x7: 🙏
2/24/21, 9:43 X7: Anyone ,kindly send the all details of relay coordination procedure with example..Thanks alot..🙏
2/24/21, 9:44 zzx: It is made to order study.The relay grading depends upon the network
2/24/21, 9:45 zzx: Please share the same and then we can discuss
2/24/21, 9:45 X7: Ok sir,I need just one example with calculations
2/24/21, 10:48 zzx: These are minimum requirements ( only for guidelines and for conceptual studies ).
2/24/21, 10:58 X7: Thanks alot sir,for your splendid information🙏🏻🙏🏻🙏🏻
2/25/21, 3:53 n22: How can we scale analog outputs in relay like current,voltage
2/25/21, 6:19 n22:
2/26/21, 12:38 XX:
2/26/21, 12:38 XX:
2/26/21, 12:38 XX:
2/26/21, 12:39 XX: During cfc compile I’m getting consistency error
2/26/21, 12:39 XX: How to slove this
2/26/21, 12:39 XX: Anyone help me
2/26/21, 12:39 XX: Plss
2/26/21, 1:16 PM – X2: there must be some issue with ur assigned I/O’s
2/26/21, 1:17 PM – X2: please cross check ur inputs and ouputs and leds and check variable type also
2/26/21, 1:17 PM – X2: mostly these type of errors came due to mismatch
2/26/21, 4:42 xx8: Go to option and run optimize run sequence
2/28/21, 2:46 PM X5:
2/28/21, 2:47 PM X5: A disturbance record of a lightning strike
2/28/21, 2:47 PM X5: After doing a climb up inspection on a tower
2/28/21, 2:49 PM X5: The question is, how to know the wave of the current and voltage whether it was short on a insulator or due to the lightning strike
2/28/21, 3:43 X24: SF6 is good? Contact Resistance of CB checked during commissioning?
2/28/21, 3:44 PM X5: Sorry 🙏🙏
2/28/21, 3:45 PM X5: I think CB operates at the right time..
2/28/21, 3:52 XX: Can u clarify further??
2/28/21, 3:53 X24: Yes, I think is not about simultaneously issue, but probably contact poin issue..
2/28/21, 4:00 PM X5: This a disturbance record from a relay right??
2/28/21, 4:00 PM X5: How can you say it is lightning strike??
2/28/21, 4:01 PM X5: We check it by climbing on the tower located from the Fault Locator relay..
DIGSI 4 9:35 bb’: What is the full form STUB ?
DIGSI 4 9:35 ppi: This message was deleted
DIGSI 4 9:37 mxx: Stub is the noun itself. No full form
DIGSI 4 9:38 mxx: When isolator is open, keeping CBs closed in one and a half, this whole arrangement is known as stub bus
DIGSI 4 9:49 KK3: can u tell something more about that term
DIGSI 4 9:50 mxx: Wt u wana know?
DIGSI 4 9:50 mxx: Thats all about it
DIGSI 4 9:50 mxx: Stub is in one and a half breaker scheme
DIGSI 4 9:51 KK3: ok
3/3/21, 12:04 X2: Micom p841 auto recloser does not save disturbance record. Can anyone state what could be the reason?
3/3/21, 12:25mxx: You tried to extract from disturbance records? Or
Check whether fault trigger is triggered by all BI & BO
3/3/21, 12:34 X2: When I try to extract from relay, it shows no disturbance record found
3/3/21, 12:34mxx: That means, please check your psl file
3/3/21, 12:34 X2:
3/3/21, 12:35 mxx: Nothing triggered
3/3/21, 12:35 X2: I am new to micom relays
3/3/21, 12:35 mxx: Change duration, trigger position
3/3/21, 12:36mxx: Input 1 trigger, change to L/H
3/3/21, 12:37 X2: I have p443 relay installed and it’s DR is working fine and configured as shown below.
3/3/21, 12:37mxx: Likewise change all digital inputs as per your requirement
3/3/21, 12:37mxx: Then check your psl file
3/3/21, 12:38 X2:
3/3/21, 12:38mxx: Both P441 and P841 psl, how fault trigger input assigned
3/3/21, 12:40 X2: Let me check from psl
3/3/21, 12:53 X2: Thanks. Got it
3/3/21, 1:01 X2: Rleay is switching off when connect with SELC662 cable
3/3/21, 1:01 X2: Any idea on this issue?
3/3/21, 1:14mxx: The main reason that can cause switching off of an IED upon touching it is normally related to power supply card. Can you check if there is not lose contact on power supply
3/3/21, 1:18 X2: Rear connection is fine
3/3/21, 1:19 X2: Any other suggestions related to SEL cable
3/3/21, 1:19 X2: Relay is healthy after remove the cable
3/3/21, 1:20 X2: Thanks for your reply t
3/3/21, 3:30 X2: can anyone share p443 distance relay setting calculation? thank
3/3/21, 5:56 XX: Can anyone explain this ??thank you
3/8/21, 12:11 X2: How to reset lockout alarm in auto recloser relay using FnKey?
3/8/21, 12:11 X2:
3/8/21, 12:11 X2:
3/8/21, 12:11 X2: LEDs gets reset through FnKey configuration but not lockout. I have to insert password for resetting it
3/8/21, 12:14mxx: Check your binary inputs. Whether all tripping and lockout relays are resetted
3/8/21, 12:15mxx: Password AAAA
3/8/21, 12:16 X2: It get resettled after password but I want to bypass password and reset the lockout through push button or FnKey
3/8/21, 12:17mxx: Assign a binary input(either FNkey or PB) to relay. According connect in PSL
3/8/21, 12:20 X2:
3/8/21, 12:24mxx: Could you please check Lockout reset instead of Rst CB1 lockout and Rst CB2 lockout
3/8/21, 12:28 X2:
3/8/21, 12:45 X2: You can try to clear through supervision or From view records, reset indication .this will clear everything
3/8/21, 12:45 X2: 👍🏻
3/8/21, 6:03 XX: Anyone send the basics of the relay coordination setting files or data,Thanks
3/10/21, 12:32 XXXXX: Hi All
If anyone can let me know how to reset block transmission in Siemens 7UT I TRIED TO RESET FROM TOP BAR MENU BUT IT IS NOT RESETTED
3/10/21, 4:01 mxx: Can someone tell how much bus rating is selected than bays CB short circuit rating? Bubar bar rating is usually kept higher than bays but how much and which code or standard says this….. Need guidance and help. Thanks in advance
3/11/21, 2:45 XX: Hi everyone,anyone here taken course of Testing& Commissioning in Chennai/Hyderabad in any institute??Plz ping me personally
3/11/21, 2:45 PMmg4: No
3/12/21, 10:56 XXX50:
3/12/21, 1:28 xx8:
3/12/21, 1:47 X2: Thanks dear
3/12/21, 1:47 X2: Relay will check Z value and V for blocking itself in case of load encroachment/blinder? Right?
3/12/21, 1:49 XXXXX: Hi If anyone could let me know all protection is block in Siemens 7UT RELAY
3/12/21, 1:49 XXXXX: How to reset it
3/12/21, 2:28 xx8: Can you share your Dex file of relay on my mai
3/12/21, 2:29 xx8: Or relay MLFB
3/12/21, 2:40 XXXXX: Sure but may be by tomorrow is there any idea where I can have the issue
3/12/21, 2:47 xx8: If protection is blocked at the time of testing please check the matching factor or if protection is blocked in relay running mode then goes to commission mode and disable the protection and reset the fault and device
3/12/21, 3:07 xx8: Yes
3/12/21, 3:07 X2: 👍🏻
3/13/21, 3:51 X24:
3/13/21, 5:14 xx8: Dear friends, I am looking for a new job opportunity as a protection engineer. I have 11 years of experience. Please reply with a private message
3/14/21, 11:49 AM gg1: 🔴 Dear participants plz don’t send any spam or adv on groups, it’s against the rules and make distraction. Thank you all 🙏🏻🙏🏻
Sahara, public relations manager
3/14/21, 12:42 X2:
3/14/21, 12:42 X2: I need one suggestion for the below error.Is this related to data model .one of our person need to convert the setting file from old micon V3.2 to V9.2 .during that process he faced this issue.
3/14/21, 2:59 XX:
3/14/21, 3:00 XX: pls help me
3/15/21, 9:14 XXX50: During ground faults the impedance seen by the distance relay is actually less than that of ph-ph fault because of tower footing resistance. That’s why we use KZN factor.. Is this statement correct?
3/15/21, 9:29 AM X5: Yes… partially it is correct
3/15/21, 10:58 XXX50: Can anyone share presentation on grid station safety measures.?
3/15/21, 11:00 XXX50: Specifically on use of T&P
3/15/21, 1:23 X2: Hello, if the fault level of a substation is say 30kA, what should be the equipment’s short circuit capacity? 120%? Any reference? Thanks in advance.
3/15/21, 1:27 KK1: The next higher rating available for that particular equipment can be selected….
3/15/21, 1:28 KK1: Reserve margin need not be considered unless you plan for any future expansion in that substation
3/15/21, 1:41 X2: As we know grid substation always have future scopes. If, due to documentary error a very narrow margin of safty factor is given, then how can we negotiate with them? We need standard….
3/15/21, 1:42 KK1: I don’t think any standards are available with regard to margin factor to be considered
3/15/21, 2:59 XXXX:
3/15/21, 7:15 X2: Is there anyway to use siemens CAPE software for learning point of view? Crack or free version?
3/15/21, 7:40 mxx: I talked seimens rep. But they say CAPE is not available in crack form.
3/15/21, 7:47 X2: If someone want to learn it. Any way around that u know?
3/15/21, 7:47 X2: What’s the cost to purchase license version
3/15/21, 7:56 mxx: You can put request on seimens website… Will give u full price of package
3/15/21, 8:11 X2: 👍🏻
3/15/21, 9:35 XXXX:—Charlotte/Application-Engineer-II—Protection_2020-05280
3/15/21, 9:54 xx8: 👍🏼🌹
3/15/21, 10:45 XXXX: 👍🏾🤜🏾🤛🏾
3/16/21, 9:57 XX: Hi does anyone have relay setting calculation template of ABB REL 670 and P444?
3/16/21, 9:28 XXXX:—Pullman/Cyber-Services-Engineer_2021-05883
3/17/21, 6:26 XXX5: This message was deleted
3/17/21, 3:07 XX: any one have D60 file with autorecloser
3/17/21, 3:08 XX: kindly send me pls
3/17/21, 4:57 xx8: Done
3/18/21, 9:01 X7: Goose communication is possible for edition-1 IED to edition2 IED
3/18/21, 9:15 XXX5: Dear Connections,
I’m looking for job opportunities in any esteemed Power T&D/Infrastructure related organisation.
My Current post Sr.Electrical Engineer – Project execution & management
I have 3.3 Years of Experience in Power T&D Industry. I have a well-rounded skill set in Power Transmission & Distribution,
Project management, Substation Construction, Project planning, Liasoning work, Survey/Design & Billing.
My area of interest includes Project Execution & Management.
Please do reach out to me if you have similar opportunities to refer me or hiring.Thanks, Regards Abhishek kapadia
3/18/21, 10:46 XXX50: What is biased current in differential prot?
3/18/21, 11:00 xx8: I bias =( I1+I2) /2 or load current.
I1 for HV and I2 for LV
3/18/21, 11:00 xx8: As per Micom p643
3/18/21, 11:01 xx8: For Transformer diff protection
3/18/21, 11:03 XXX50: 👍🏻
3/18/21, 11:04 xx8: It is available also for line and bus bar protection
3/18/21, 11:04 XXX50: This message was deleted
3/19/21, 1:46 XXX52: Confira esta vaga na ABB Brasil:
3/20/21, 12:45 bb:
3/20/21, 12:46 bb: I imported .pcmp project file in cet tool computer node management options are hided any idea on this issue please help me
3/20/21, 3:22 AM X5: Still doubt
3/20/21, 3:23 AM X5:
3/23/21, 12:10 AM X6: What is the difference off HIBB and LIBB Scheme in protection system
If any literature available. Please share.
3/24/21, 6:55 XX: Anyone have CSE livelink software for C&S relay
3/24/21, 12:07 PMbb: This message was deleted
3/24/21, 6:02 bbr:
3/24/21, 6:03 bbr: Anybody help on this error while opening disturbance short report this error occurring
3/24/21, 11:37 XX: Thanks sir,for valuable info🙏
3/24/21, 11:38 XX: Why does inrush current occurs in transformers?what is the main reason behind it?Thanks
3/25/21, 7:37 XX:
3/25/21, 10:28 XXX50:
3/25/21, 10:28 XXX50: How to export settings in pdf easergy studio?
3/25/21, 10:33 gg1: Hi!!
3/25/21, 10:35 gg1: Open every carpet and select all that You need ( ctrl +clic) and after go yo primer And clic print as . PDF
3/25/21, 10:36 gg1: Go to printer**
3/25/21, 10:42 XXX50: 👍🏻

3/25/21, 12:24 gg1: higher flux density . this is one of the reasons giving higher inrush current .
3/25/21, 12:25 XX: Sir,Need clear elaboration
3/26/21, 10:43 zz1: I need little help for ABB relay goosing in PCM600 2.10
3/26/21, 10:44 zz1: Just want to send goose signal which block should I use for any user defined signal in pcm600 2.10
3/26/21, 10:45 XXX4: What do u mean by block?
Simple add the signal with OR gate in the input of Goose block
3/26/21, 10:45 zz1:
3/26/21, 10:46 zz1: Which block is used for goose send
3/26/21, 10:58 XXX4: You can use alll these depending on your input type
3/26/21, 10:58 XXX4: Is your input is double point?
3/26/21, 10:59 XXX4: The goose block in Tx relay should be the same in Rx relay for 670 series
3/27/21, 6:04 X9: Single point single
3/27/21, 6:04 X9: I have 615 series
3/27/21, 11:34 X9: If Anyone have PCM600 2.10 ABB to ABB relay goosing project file….please share it with me
my email Id is ==========================
3/27/21, 12:06 X2: How to perform c&df test on PT/VT?
3/27/21, 12:07 X2: 1. HV cable on primary side

  1. Reference cable on tan delta point
  2. Short secondary windings….
    3/27/21, 12:07 X2: Are above connections okay?
    3/29/21, 6:26 XXX52:
    4/1/21, 10:43 X9: Anyone here knows PCM 600 2.10
    4/1/21, 10:43 X9: Need little help about SCADA signal mapping
    4/1/21, 10:44 AM X5: You can directly get from abb website
    4/1/21, 10:44 AM X5: It’s free
    4/1/21, 10:45 X9: I have it..I need little help in configuration
    4/1/21, 10:47 X9: Let me explain…
    If I have to send any user defined signal to SCADA via SPCGGIO block so what to do
    4/1/21, 11:45 XX8: can anyone tell me how to change name if substation in p546 relay
    4/1/21, 11:45 XX8: i want substation name in relay
    4/1/21, 11:46 XX8: in display
    4/1/21, 12:13 XX: I need a support for configuring 7sr reyrolle synchronizing relay
    4/1/21, 12:14 XX:
    4/1/21, 1:59 PM X5: Micom or GE?
    4/1/21, 1:59 PM X5: You need Micom S1 studio
    4/1/21, 2:01 XX: I need a support for configuring 7sr reyrolle synchronizing relay
    4/1/21, 2:01 XX:
    4/1/21, 9:45 mg42: Hello can some one help me ?
    In 30 kV switchgear if i put the incoming circuit breaker open and in service position I read voltage (700 V) in the relay
    4/1/21, 10:10mxx: Is it new or it has been existing? Just to know whether this has just come up all over a sudden
    4/1/21, 10:15mxx: Am thinking that you may check ratio setting in relay or if VTs are located on cable side check whether no back feed, otherwise check whether there is a CB pole that is not opening wholly
    4/1/21, 10:15mxx: My thinking
    4/1/21, 10:16 mg42: It is a new MV switchgear and after tests we tried to put it in service but when we put the incoming CB in test position we read voltage in the protection despite the CB is open
    4/2/21, 12:11mg42: 1- VT located before the Breaker towards incoming Cable
    2- check Relay power Data & compare with SLD CT/VT data.
    4/2/21, 12:15 gg1: There is not VT in the cable the VT is in the bus bare
    4/2/21, 12:16mg42: Hhmmm SLD plz
    4/2/21, 1:18 PMX13: Hello guys
    Please help me. How to resolve overcurrent issue in ABB inverter. I m working in solar..
    4/2/21, 1:26 nv1:
    4/3/21, 10:26 XXXX:
    4/6/21, 8:09 nv: Anyone have some documentation regarding problem in fault identification in case of double point earthing of CVT/PT secondary?
    Plz share any documents/experiences.Regards.
    4/7/21, 10:26 XXX50: Can white color (new) silica gel be used in auto transformers?
    4/7/21, 10:27 X7: This message was deleted
    4/7/21, 3:51 PM X5: Anyone has REM 615 calculation
    Can anyone provide me basbur scheme and related protection scheme.
    4/10/21, 12:45 nv1:
    4/11/21, 7:52 XX:
    4/12/21, 12:16 X2: What is the significance of line angle in impedance relays?
    4/13/21, 7:09 X2: Ramadan Kareem ! May Allah accept our good deeds and help us to keep us with the same enthusiasm even after Ramadan. Ameen.
    4/13/21, 7:30 mxx: Ameen
    4/14/21, 6:39 XXX52: Confira esta vaga na Red Eléctrica:
    4/14/21, 7:03 AM X5: Happy Ramadhan to all my friend 🙏
    4/14/21, 3:28 X24: Ameen soma Ameen
    4/15/21, 8:01 X7:
    4/15/21, 8:04 zzx: In measured is the earth fault current measured by earth fault current coil of relay.
    In derived is the earth fault current derived in relay by summation of Irph+ Iyph+Ibph currents.
    4/15/21, 8:06 zzx: Sensitive protection will be used if the desired protection settings are very low for earth fault eg 0.001 x In.especially where system is NGR earthed
    4/15/21, 8:07 zzx: Vn derived is open delta volatge derived by relay durin summation of Vr+Vy+Vb voltage.this is done when 4th coil is not available in relay.the summation is vector summation
    4/15/21, 8:18 zzx: This is Neutral Displacement Relay .
    4/15/21, 8:18 zzx: Yes , CBCT is used as sensitive protection ( while earth fault current is very low ).
    4/15/21, 8:22 X7: Thanks ☺️Dhaval ji
    4/15/21, 8:31 zzx: 👍
    4/15/21, 8:36 X7: Thanks chatterjee👍☺️
    4/15/21, 10:39 AM X5: Hello guys, there are some cases that i want to know more
    4/15/21, 10:39 AM X5: This message was deleted
    4/15/21, 10:39 AM X5: This is the Rated Operating Sequence (Duty Cycle) of the circuit breaker. Which denotes the sequence of opening and closing operations which the circuit breaker can perform under specified conditions
    4/15/21, 10:39 AM X5: The operating sequence as follows : O-t-CO-T-CO
    /15/21, 10:39 AM X5: since cb is already charged it will take t= 0.3 s to close but next reclose order cb has to recharge it operating mecanism and it will take T= 3 min to recharge its spring or hydraulic system and then able to reclose.
    4/15/21, 10:39 AM X5: And 0.3 s is required for Arc Quenching medium such as oil, SF6 etc to regain its properties after tripping of the CB.
    4/15/21, 10:41 AM X5: What is the consideration to choose the reclaim time for CB reclosure by 3 min
    4/15/21, 10:47 XX4: Maybe… Mechanical charging movement.. And avoid failure in system when fail to reclose at 1st order. While 3 minute is enough to decide what you have to do.
    4/15/21, 10:49 XX4: #to avoid
    4/15/21, 11:25 X7: In case of 220kv Substation,when both lines are charged ,then y buscoupler is closed?reason behind this?? Thanks
    4/15/21, 11:41 XX4: Ring Bus System (Loop). Is more dependable
    4/15/21, 12:01 XX: Voltage collision may happen when buscoupler is closed
    4/15/21, 12:28 X24: You have to use synchron check relay to close the bus couple breaker during both of bus is energizing
    4/15/21, 12:36 XX: By the use of only syn check relay,the pblm will be solved@628118982909 ??
    4/15/21, 12:37 X24: What is the problem?
    4/15/21, 12:41 X24: This is basic design of Substation.
    4/15/21, 12:41 XX: No pblm dear..
    4/15/21, 12:41 X24: Squence, interlock, protection, syncrhonizer.
    4/15/21, 12:43 X24: As long as I know, when I did worked as Digital Grid Substation Commissioning Engineer at Siemens Indonesia.
    4/15/21, 12:45 XX: Okay 👍
    4/15/21, 12:45 nv1:
    4/15/21, 12:47 PM X5: Hm..yes i agree.. It concerns with mechanical charging i.e spring charge and also its insulation media
    4/15/21, 12:49 PM X5: But isn’t 3 min is too long ?
    4/15/21, 12:50 X2: Dear follow Engrs,
    I am trying to trace fault on Transformer that trips on differential protection. I conducted IR test, it shows okay. I need advice
    4/15/21, 1:11 X24: Check the CT
    4/15/21, 1:12 gg1: CT Polarity & CT ratio should be same .
    Please check CT connection .
    4/15/21, 1:13 X24: No, sometime when problem at 1st order, you need to check all anatomy and the condition while thats 3 min.
  3. Elec-Engg takes benefits the WhatsApp groups for a large number of professionals all over the world to discuss and share updates related to protection relay, protection relay testing. Please read the below rules carefully and text for joining: +989129613659
    4/15/21, 1:14 gg1: As a thumb rule –
    Alternatively, set differential relay shall have an offset of 20 per event of transformer full load current. This is just a thumb rule .
    U need to use ur judgement
    4/15/21, 1:15 gg1: As a Last option, can u please carry out stability check for through fault current condition
    4/15/21, 1:15 gg1: These are the three options available to verify differential relays .
    4/15/21, 1:20 X24: The most event is CT has saturated.
    4/15/21, 1:21 gg1: Yes , one CT gets saturated due to through fault current in low impedance differential relays .
    4/15/21, 1:27 PM – J 1000 7267 Intr: Are u commissioning a new transformer (first charging)or is it a transformer which is already in service.
    4/15/21, 1:36 X2: It ready in service sir
    4/15/21, 1:44 X2: Okay sir, there is induction near the primary CT but , we are trying to isolate the area
    4/15/21, 4:28 X2: Thank you all. I have found the cause of tripping. It’s LV side VT
    4/15/21, 4:38 XX: What Vt is causing to trip??
    4/15/21, 4:42 X2: There is breakdown of insulation between HV side of the VT to ground
    4/15/21, 4:44 XX: How did you trace this problem location
    4/15/21, 4:52 X24: Good job bro
    4/15/21, 4:53KK: Can u share pics
    4/15/21, 7:10 X2:
    4/15/21, 7:24 X24: Thats decribe of accuration.
    I think… <1 Ampere in primary should be calculate in Secondary, how much value to inject in secondary side is related to CT ratio.
    4/15/21, 8:30 X2: Thank you .Do you have any write up or document for this
    4/15/21, 8:36 X24: May you can check your procedure/work instruction of relay testing.
    4/15/21, 8:37 X2: What is the process of relay setting
    4/15/21, 8:37 X2: Ex
    4/15/21, 8:37 X2: Example REM615
    4/15/21, 8:41 X24: At the first, you have to download the manual instruction.
    4/15/21, 8:41 X24: Then read it..
    4/15/21, 9:01 X24: And then you do copy section of the setting & configure in your own format of Work Instruction.
    After that done, you will get the answer..
    4/16/21, 6:46 gg1: Hello, I am working in Digsi 5 for relay Siprotec5 Siemens. I would like if is possible to chance the magnitud from kV to V. or anyother magnitude

IEC 61850, 9:56 nv1: This message was deleted
IEC 61850, 10:06 XXXX:—Pullman/Test-Development-Engineer_2021-06064
IEC 61850, 12:49 PM X5:
IEC 61850, 4:08 X2: We carry out Insulation resistance test on the each terminal equipment and finally found that IR of VT is >10 kilo-ohms
IEC 61850, 4:10 X2: We try to restore the Transformer but it is still tripping on differential protection after 3seconds
IEC 61850, 4:16 X24: Let show the some data
IEC 61850, 4:20 X2: It’s 7.5 MVA 132/33kV Transformer, CTR: pri = 100/1A sec=100/1A
IEC 61850, 4:20 X24: Picture of the alarm
IEC 61850, 4:21 X24: Do you have a scada?
IEC 61850, 4:22mxx: VT have primary terminal A-N.. try to remove N which is connected to body of the VT and try IR test
IEC 61850, 4:24 X2: No sir
IEC 61850, 4:24mxx: Secondary terminal a-n. Remove n from earth and perform the following IR test..
IEC 61850, 4:27 X2:
IEC 61850, 4:27 X2:
IEC 61850, 4:34 xx8: This message was deleted
IEC 61850, 4:35 xx8: It’s knew operation or it was working before?
IEC 61850, 5:18 X2: It was working before
IEC 61850, 5:23 xx8:
IEC 61850, 5:31 xx8: Can Y send the CT secandry drawing?
IEC 61850, 5:34 X24:
IEC 61850, 5:40 X24: For your additional input..
After all connection are install properly, comprehensif CT need to check, and or inject current test for relay.
And also Transformer Ratio check.
IEC 61850, 5:40 X24: And this explained
IEC 61850, 5:47 X24: 3 second is alot of probability,
I guess it was suspected since knee CT/saturated or relay accuration has been out spec. Except cable connection..
IEC 61850, 6:26 gg1: 3 second means 3000 mili second .
This is too much .
Could you please fix an offset (between two sides of transformer differential relay) @ 20 percent maximum .
So that if the differential current is more than 20 percent , then only differential relay shall operate .
IEC 61850, 11:11 X2: We have carried out various tests on the Transformer but magnetic balance test failed and magnetizing current is also high
IEC 61850,, 8:34 zzx: Ok . Can you please refer this transformer problem to the Transformer manufacturer.
IEC 61850,, 1:34 PM X5:
IEC 61850,, 1:34 PM X5: Need help 🙏🙏
4/20/21, 1:53 XX: Can anyone say me which are the best books to refer for operation & Maintenance of Substation equipments??thanks
4/20/21, 11:02 XXXX:—Lewiston/Manufacturing-Engineer_2021-05842
IEC 61850,, 7:33 XXX52:
IEC 61850,, 9:57 AM X6: This message was deleted
IEC 61850,, 12:48 PM X5: Hm, does power plant also have a distance relay too ?
IEC 61850,, 1:09 X24: No…..
IEC 61850,, 1:13 xx8: some times the Transmission line Substation it will be with power plant .
IEC 61850,, 1:55 X24: Yes that sure, but only same grid/level voltage like look Substation.
But there is outgoing of Powerplant, i never seen distance relay in out going Power Plant.
IEC 61850,, 11:12 X2: Mahantam Electrical & Services would love your feedback. Post a review to our profile.
IEC 61850,, 7:16 AM X5:
IEC 61850,, 7:16 AM X5: Fault Code 83 FPGA
IEC 61850,, 7:16 AM X5: Field Programmable Gate Array FPGA
IEC 61850,, 7:16 AM X5:
IEC 61850,, 7:16 AM X5: Alarm in ABB REU615
IEC 61850,, 7:16 AM X5: Does anyone know what can cause the error code ?
IEC 61850,, 12:16 X24:
IEC 61850,, 3:04 XXXX: replace the cpu board!!
IEC 61850, 3:44 mm2: What is the meaning of check phase relay
IEC 61850, 3:46 mm2: I have a problem in motor when we start at auto mode appeare this massage but when start manual mode not appare
IEC 61850, 5:29 XXX52:
IEC 61850, 1:04 X2: Has anyone tested the switch synch relay F236 ABB make?
IEC 61850, 3:18KK: What to do if meter does not show ampers of ct?
IEC 61850, 3:31 X2: Is your meter showing zero Amps?
IEC 61850, 6:50 mxx: Hello guys.
We are facing a short circuit problem exceeding bus rating while EDG testing.
When EDG testing is being performed, if SC occurs SC level exceeds BB withstanding capcity.
Solution: we are intending to use series reactor while testing nd bypassing reactor under normal condition.
Risk: Is there any chance of switch spark or surges ,
Or should we continue with it .
Keeping in mind,there would be the voltage drop in series reactor
IEC 61850, 6:53 XX: Edg??
IEC 61850, 7:03 mxx: Emergency diesel generator
IEC 61850, 7:03 mxx: Online testing of EDG
IEC 61850, 7:03 nv1:
IEC 61850, 7:04 X24: Interesting
IEC 61850, 7:05 X24: Why it happened
IEC 61850, 7:06 X24: Share SLD please
IEC 61850, 7:08 mxx: Later on I’ll share,,,,
IEC 61850, 7:27 XX: Hello everyone
We have a problem in our plant.the design is based on 30MW for each power gen steam turbine and 4MW from grid all protection and study state.know we bring 30MW from grid and 15MW for each TG we face à lot of problem like blackout when grid disturbance.the restudy is requested ?and i need your advise please
IEC 61850, 7:35 X24: Protection coordination review..
IEC 61850, 8:13 nv1: There is a problem in relay need to get your relay settings reviewed.
IEC 61850, 8:13 nv1: Correct
IEC 61850, 8:14 nv1: Is ur plant getting islanded for grid disturbances
IEC 61850, 8:14 XX: Yes
IEC 61850, 8:14 X24: Speed control check also
IEC 61850, 8:14 X24: Load share i mean
IEC 61850, 8:15 X24: Or speed droop
IEC 61850, 8:16 nv1: This message was deleted
IEC 61850, 8:16 nv1: Can u share ur SLD
IEC 61850, 8:17 nv1: If ur plant get islanded and TG’s are detecting the islanding.then TG sets should survive.since u are importing 30MW from grid.please check balance load on TG after islanding also
IEC 61850, 8:18 nv1: What is the voltage level
IEC 61850, 8:18 XX: When i Will be on site i Will share To u sld
IEC 61850, 8:18 XX: 60kv
IEC 61850, 8:19 XX: A
IEC 61850, 8:20 XX: Islanded means??
IEC 61850, 8:21 XX: Islande mode means autonom
IEC 61850, 8:26 XX: Autonom??
IEC 61850, 8:42 XX: Without external source
IEC 61850, 10:15 mxx: 6.6kv
IEC 61850, 10:19 XX: 60 kv
IEC 61850, 11:10 nv1: What is the EDG rating (MW rating) and the other souce details which u intend to run in parallel while carrying out EDG testing.what is the shirt circuit rating of 6.6KV much time u intend to run in we understand EDG is generally used for black start may not continuosly be in circuit.
IEC 61850, 11:11 nv1: Putting a reactor will increase problem as it will be difficult for voltage control
IEC 61850, 1:19 XX4: That reason make it interesting..
IEC 61850, 1:24 XX4: Nothing related between Busbar rating with short circuit except failure in insulation, its mean busbar failure
IEC 61850, 1:26 XX4: Maybe reactor installation inniciated during EDG cospy gone to capacitif area. That problem in loadshare control/speed droop
IEC 61850, 1:26 XX4: Chosphi*