Best Practices for clearing a ground on an ungrounded delta
Best Practices for clearing a ground on an ungrounded delta
(OP)
Greetings
I am looking for an example document/policy related to best practices for clearing a ground on an ungrounded delta system. Maybe someone from an industrial location has one to share?
Thank You
Shorted1
I am looking for an example document/policy related to best practices for clearing a ground on an ungrounded delta system. Maybe someone from an industrial location has one to share?
Thank You
Shorted1






RE: Best Practices for clearing a ground on an ungrounded delta
1. Turn off all loads (On that part of the system)
2. Have someone monitor the ground detector lights with a radio
3. restore loads 1 at a time, if ground shows up, turn that load off and continue restoring loads 1 at a time.
Or you can do it the way most industrial plants do, just wait for a 2nd ground and look for the smoke. (I am kidding, dont do this)
RE: Best Practices for clearing a ground on an ungrounded delta
However, I am looking for a formal policy that someone may have in place at an industrial location. I am looking for an example that I can adjust for my facility.
Thanks
Shorted1
RE: Best Practices for clearing a ground on an ungrounded delta
Beware of discontinuous (arcing) ground faults. Select the resistance/current in consultation with your plant electrical department.
Bill
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"Why not the best?"
Jimmy Carter
RE: Best Practices for clearing a ground on an ungrounded delta