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#180317 08/21/08 06:05 PM
Joined: Jan 2001
Posts: 1,044
Tom Offline OP
Member
In order to comply with 250.21(B), I need a ground detector. All I've found so far is one made by Cutler Hammer (way too expensive at about $2000) and a detector that uses lights (haven't priced it yet). I'd really like to have something with a set of relay contacts that I could hook to a bell or horn in order to get some attention when the first ground fault occurs.

System voltage will be 480 volts.

Anyone know of a product that will help me?


Few things are harder to put up with than the annoyance of a good example.
Joined: Jul 2001
Posts: 599
J
JBD Offline
Member
I have used some from Erickson Electrical Equipment,
http://ericksonelectric.thomasnet.com/category/ground-detectors?

Joined: Jun 2007
Posts: 301
J
Member
Would not a megger be a suitable substitution?

Joined: Apr 2007
Posts: 37
J
Member
Originally Posted by JValdes
Would not a megger be a suitable substitution?


He wants a permanent ground detector that is built in. They are normally used and required on ungrounded systems to tell if a leg is accidentally shorted to ground.

Joined: Jan 2001
Posts: 1,044
Tom Offline OP
Member
JBD,

Thanks for the lead on the Erickson equipment, I'll have my supplier price one next week.

Tom


Few things are harder to put up with than the annoyance of a good example.

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