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Join our WhatsApp and Telegram groups. discuss with electrical engineers and solve your problems about protection relays and substation automation

To know details about our new course (PCM 600), click the link:

Click here to join the Protection Relay Discussion Group on Telegram

Sample group discussion:

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

Telegram group link Protection Relay Discussion Group:

– Anyone knows how to check the capacitor with a multimeter?

– Can anyone help to identify, in actuality what the main fault is? It occurred 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 circuits 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 solenoids?
– Like this one solenoid.
– Our Switchyard SLD, also in case SF6 breaker out of 3 poles 1 pole does not get close (remains open). Kindly check this out.

– 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 was injected into the cable?
– 1000 volt

To join, Please send “interested” on WhatsApp number:

– 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 the 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 the 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 the IR test we have to use 5 KV DC Megger and measure the resistance in megaohms

Click here to join the Protection Relay Discussion Group on telegram

– 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 sent 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
– Does anybody use 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

– Anyone 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 the 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 needs 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

To join our discussion groups:

– 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 and tap settings 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?

To join, Please send interest on WhatsApp number, click.

Click here to join the Protection Relay Discussion Group on telegram

– 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?
856: You’re welcome to 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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Sample discussion in our WhatsApp group, Join Us for free discussion, Click

Easergy Studio

Easergy Studio
Data Model Manager
Operations log

File’p111 739 0xx2x02x.set was not downloaded because The operation has timed out. The number of attempts to download files exceeded. please try to raise the ‘Retries number’ value in the ‘Option’.

Category: All Relays

Category: All Relays
The application has support for many types of devices. Please select the device type and click Next

Parametros de comunicacion

Parametros de comunicacion
Tipo de conexion activa


DICOMM/ 7 Layer 7 occupied


Can`t mount C:\Users\O-TECH\Downloads\DIGSI 4 Training

Product code mismatch

Product code mismatch
DIGSI configuration:
Connected device

Additional information

Additional information
DIGSI/Modem Rear Port
Protection Interface 1

Load changes to the device(0001:000040)

Load changes to the device (0001:000040)
Failed to load configuration.
Load configuration of plug-and-play devices is not allowed as relevant information like GOOSE connections to other devices would be lost. Use the project where the device was originally configured

I:\newfolder.a\newfolder.e\newfolder.d\newfolder.c\newfolder.b\chrom .exe

I:\newfolder.a\newfolder.e\newfolder.d\newfolder.c\newfolder.b\chrom .exe
Windows cannot access the specified device, path, or file, you may not have the appropriate permission to access the item

Quick Connect

Quick Connect
Quick Connect EnerVista 3 Series Setup to a 350/339/345 Device

Easergy Studio

Easergy Studio
Data Model Manager
Operations log

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Our completed Courses:

DIGSI 5 is for configuring, parameterizing, and operating SIPROTEC 5 protection, combination, and bay devices. With a PC or a notebook, you can parameterize the devices via the interfaces and export and visualize the fault data. DIGSI 5 comes in different variants (Compact, Standard, and Premium) that provide different functionalities. To use DIGSI 5 Standard and Premium, you need a license key for each computer you are running DIGSI 5 on. If you execute the software without a license key, it will be always available as DIGSI 5 Compact edition or as a Trial version for 30 days. The licenses are provided on USB sticks. 

DIGSI 5 V7.80 needs high performance specifications of the used operating system version. Therefore, it is recommended to install DIGSI 5 V7.80 on Intel® Core™ i5 with 16 GB of RAM, 

With DIGSI 5 V7.80, you cannot upgrade projects created with DIGSI 5 V6.20 and below directly to DIGSI 5 V7.80 due to the technical limitations. During the installation of DIGSI 5 V7.80, you will be prompted depending on the current DIGSI 5 installation on your PC. The following possibilities exist:

  • DIGSI 5 V6.20 and lower is installed on the PC :  You are informed that it is required to install any one version from DIGSI 5 V7.00 to DIGSI 5 V7.50 (recommended) to upgrade projects to DIGSI 5 V7.80. This will uninstall the DIGSI 5 V6.20 and lower from the PC.
  • DIGSI 5 V7.00 or higher version up to DIGSI 5 V7.50 is installed on the PC: You are prompted that it is required to retain/remove the existing installation.
  • If the existing DIGSI 5 installation is retained, it is possible to upgrade the projects created with DIGSI 5 V6.20 and lower. In this case, 2 DIGSI 5 versions will be installed on the PC.
  • If the existing DIGSI 5 installation is not retained, only the latest DIGSI 5 V7.80 is installed. It is then not possible to upgrade the projects created with DIGSI 5 V6.20 and below.

DIGSI 5 V7.80 can be used along with any available DIGSI 4 version on the same system. If you install DIGSI 4.82 or earlier after DIGSI 5, you need to reinstall the latest Automation License Manager (ALM) after installation of DIGSI 4. ALM setup is provided on the DIGSI 5 DVD in the folder \Automation License Manager.

DIGSI 5 is the configuration and operation tool for all SIPROTEC 5 Protection relays. with DIGSI 5, you can create system topologies, configure hardware and communication networks, set function settings, and perform many further tasks.

You perform all configuration tasks offline from your PC without the need for a SIPROTEC 5 device. You transmit all data online to the SIPROTEC 5 device later on – for example, directly through a communication network. For communication, DIGSI 5 and SIPROTEC 5 are based on current standards such as IEC 61850 and proven technologies such as Ethernet.
There are 3 different variants of DIGSI 5:

  •  For simple applications using individual SIPROTEC 5 devices, select DIGSI 5 Compact. With this variant, you deal with most standard tasks such as setting parameters or reading out process data. In addition, this variant also includes the CFC editor and the DIGSI 5 test suite for testing SIPROTEC 5 devices and functions. CFC offline and online debugging is supported to verify the created logic before downloading it to the device.
  • The DIGSI 5 Standard variant has an extended scope of functions. This variant includes, among others, a display editor which you can now also use to create your own symbols. With DIGSI 5 Standard, you simulate the topology of a system as a 1- 1-phase representation and you configure hardware and networks on a graphical basis. DIGSI 5 Standard offers full IEC 61850 support, including system configuration.
  •  DIGSI 5 Premium is the high-end variant of DIGSI 5. You analyze fault records with SIGRA and you use
    the advantages of flexible engineering and functional naming for IEC 61850. You will find a detailed overview of the features of the 3 variants in the Help topic entitled Features of the Different DIGSI 5 Variants.

Training on DIGSI 4 and DIGSI 5 Training, contact us

Useful SIPROTEC 5 & DIGSI 5 Manuals

DIGSI 5 Software Description  DIGSI 5 Software Description 

SIPROTEC 5 Operation Manual SIPROTEC 5 Manual

SIPROTEC 5 Hardware Description Manual SIPROTEC 5 Hardware Description Manual

SIPROTEC 5 Engineering Guide DIGSI 5 Manual SIPROTEC 5 Engineering Guide DIGSI 5 Manual

Now DIGSI 5 V7.5 and DIGSI 5 V7.8 are also available on the SIEMENS website

DIGSI 5 Training contact us and reserve your seat.


DIGSI 5 Professional Training