• Home
  • /
  • Blog
  • /
  • How to Connect to a GE DGP Relay with Testing Tips

How to Connect to a GE DGP Relay with Testing Tips

GE DGP Relay


Cable: 9-pin to 9-pin RS-232 Null Modem
Software: EnerVista DGP

Software Default Settings

Unit ID (Address): 0
Real-Time Data Update rate: 2
Granular Timeout: 150
No. of Retries: 5
Switch Code:
Termination Code:
Baud Rate: 9600 (or 2400)
Parity: None
Stop Bits: 1
Data Bits: 8
Modem Init String:

Passwords & Connection Info

Model: From right side of case or on top middle on newer relays
Password: CTRL or SETT or VIEW . You might need to add an “.” or “!” to the end and change the password

Don’t spend a lot of time on communication, it is hit and miss. If it doesn’t work, press [ACT] button on front panel, scroll to “Enter Password” and type “1234.” Or “5678.” And enter settings manually. Hit [END] and [ENT] after last setting entry to save.

Testing Tips

  1. 87 Differential Protection needs neutral current input from residual current to operate!!!! Connect CT connections 2-4-6-7 and connect return to terminal 8
  2. 59 requires 3 phase to operate properly
  3. When testing VTFF, Current should be >0.1 but < 87G Pickup Setting
  4. The solid-state trip outputs may bleed too much voltage when the contact are open and your test-set may indicate that they are closed when they are actually open. Look for voltage sensing controls in your test-set configuration and manipulate those numbers to get actual indication.  Otherwise use the alarm contacts to do your testing and prove the in-service contacts change state correctly with a fluke.

 Did you like this post?

You can share it with these links:

About the Author

Chris is an Electrical Engineering Technologist, a Journeyman Power System Electrician, and a Professional Engineer. He is also the Author of The Relay Testing Handbook series and founder of Valence Electrical Training Services. You can find out more about Chris here.

Read More Articles:

How to Connect to a GE MIV Relay

Leave a Reply

Your email address will not be published.

  1. Any chance you have a good tip about running this program on a newer, 64bit machine? Looks like I’m going to set up a VM to get it workin’

    1. I wouldn’t bother. The software was extremely limited when it did work on the computers of the day, and even then it was a 50/50 chance whether you were going to be able to communicate at all.

      I just manually recorded the settings on a test sheet from the front panel. It was faster than fighting the program communications and eventually it was faster than the using the program.

{"email":"Email address invalid","url":"Website address invalid","required":"Required field missing"}