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Ground detector needed #180317
08/21/08 06:05 PM
08/21/08 06:05 PM
Tom  Offline OP
Member
Joined: Jan 2001
Posts: 1,044
Shinnston, WV USA
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.
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Re: Ground detector needed [Re: Tom] #180336
08/22/08 09:27 AM
08/22/08 09:27 AM
J
JBD  Offline
Member
Joined: Jul 2001
Posts: 599
WI, USA
I have used some from Erickson Electrical Equipment,
http://ericksonelectric.thomasnet.com/category/ground-detectors?

Re: Ground detector needed [Re: JBD] #180342
08/22/08 11:54 AM
08/22/08 11:54 AM
J
JValdes  Offline
Member
Joined: Jun 2007
Posts: 301
South Carolina
Would not a megger be a suitable substitution?

Re: Ground detector needed [Re: JValdes] #180345
08/22/08 04:00 PM
08/22/08 04:00 PM
J
junkcollector  Offline
Member
Joined: Apr 2007
Posts: 36
Central MN
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.

Re: Ground detector needed [Re: junkcollector] #180355
08/23/08 08:29 AM
08/23/08 08:29 AM
Tom  Offline OP
Member
Joined: Jan 2001
Posts: 1,044
Shinnston, WV USA
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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