×
Follow Us
Results 1 to 3 of 3

Circuit Breaker Grounding Cart Testing

    #1
  1. Join Date
    May 2018
    Posts
    25
    Reputation

    Circuit Breaker Grounding Cart Testing

    A bit of an oddball item to test, but this conversation came up recently. Obvious valid tests, in my mind, for Circuit Breaker Ground Cart testing would be to DLRO each phases of the bus to ground. Possibly Primary Injection. One of our colleagues suggested Hi-potting. What is everyone's take?

  2. #2
  3. SecondGen's Avatar
    SecondGen is offline
    I push buttons.
    NETA Level III Pro Subscriber
    Join Date
    Jan 2014
    Location
    United States
    Posts
    508
    Reputation
    Quote Originally Posted by roberts311 View Post
    A bit of an oddball item to test, but this conversation came up recently. Obvious valid tests, in my mind, for Circuit Breaker Ground Cart testing would be to DLRO each phases of the bus to ground. Possibly Primary Injection. One of our colleagues suggested Hi-potting. What is everyone's take?
    Are you referring to a MV Ground & Test Device? If so, we usually do a DLRO in both positions, megger and hipot just like we would a medium voltage breaker. Not sure what primary injection would do in this case...

  4. #3
  5. ElectricalTestTech's Avatar
    ElectricalTestTech is offline NETA Level IV
    Affiliate Member
    Pro Subscriber
    Join Date
    Sep 2017
    Location
    Washington, DC
    Posts
    69
    Reputation
    Quote Originally Posted by SecondGen View Post
    Are you referring to a MV Ground & Test Device? If so, we usually do a DLRO in both positions, megger and hipot just like we would a medium voltage breaker. Not sure what primary injection would do in this case...
    I am thinking along the same lines as you SecondGen. A medium voltage ground and test device is the only thing that comes to my mind.

    DLRO - insulation resistance - hipot

Subscribe

Share this thread

Related Topics

  1. Draw out circuit breaker positions, how many?
    By Mjeelemco in forum NETA Level 2 Exam
    Replies: 9
    Last Post: December 12, 2020, 07:54 AM
  2. Vacuum Circuit Breaker
    By shamimkhan in forum Electrical Testing Talk
    Replies: 1
    Last Post: December 8, 2017, 10:42 AM
  3. training for low voltage circuit breaker testing
    By Tdreissig0505 in forum Electrical Testing Talk
    Replies: 2
    Last Post: December 7, 2017, 11:27 AM
  4. Identify this circuit breaker symbol
    By MAKI2016 in forum NETA Level 2 Exam
    Replies: 10
    Last Post: September 27, 2017, 08:33 AM
  5. Do you always pull circuit breaker arc chutes?
    By wrh9278 in forum Electrical Testing Talk
    Replies: 3
    Last Post: April 24, 2016, 12:50 PM
Follow us


Explore TestGuy


NETA Certification Training


NICET Electrical Power Testing


Help and Support




You are viewing the archives. Enjoy new features and join the conversation at wiki.testguy.net