×
Follow Us
Results 1 to 2 of 2

Isolating Line protection

    #1
  1. Join Date
    Jul 2020
    Posts
    7
    Reputation

    Isolating Line protection

    What sequence do you all use when isolating line protection. I isolate trips, pull comm, inputs, pots and then current. I know of a couple guys that go in a different order. Opinions?

  2. #2
  3. Join Date
    May 2019
    Posts
    45
    Reputation
    Quote Originally Posted by Js20981 View Post
    What sequence do you all use when isolating line protection. I isolate trips, pull comm, inputs, pots and then current. I know of a couple guys that go in a different order. Opinions?
    Doing this today actually. We follow pretty much the same. We usually do comms first. Trip's for breakers in question next, then BUS trips, Breaker Failure etc. I think we do current and then voltage. Senior tech was explaining in older electro-mech relays a loss of voltage while still having current could send a trip. Its funny how older protection systems still have input on todays habits. Also, always check the prints

Subscribe

Share this thread

Related Topics

  1. Power loss in a transmission line
    By amarillo1970 in forum NETA Level 4 Exam
    Replies: 3
    Last Post: April 20, 2022, 03:02 PM
  2. The power loss in a transmission line due to charging current
    By BrickSalad in forum NETA Level 4 Exam
    Replies: 0
    Last Post: July 9, 2019, 06:48 PM
  3. Electrical Single Line Question
    By Joshua122042 in forum Electrical Testing Talk
    Replies: 3
    Last Post: June 27, 2019, 09:36 AM

Tags for this Thread

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