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Interav OV relay: how to do an integrity test.

 
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bob.verwey(at)gmail.com
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PostPosted: Sun Jun 27, 2021 7:41 am    Post subject: Interav OV relay: how to do an integrity test. Reply with quote

So I'm sitting with this interav OV regulator of unknown condition that I want to test.
It has all white leads, but it's fairly easy to pick up what appears to be the coil at 3 ohms and the contacts on the other two wires.
[img]cid:ii_kqfcys9w6[/img]

Now since I don't really know how these devices work, I'm looking for advice on how to test effectively. 

Do these devices work/not work, or is there more to it?


Best Regards,Bob Verwey

082 331 2727


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PostPosted: Sun Jun 27, 2021 11:50 am    Post subject: Re: Interav OV relay: how to do an integrity test. Reply with quote

Are the wires shorted together that you suspect are the contacts?
If not, maybe the 3 ohms are the contact wires. 3 ohms could be from corroded contacts.
3 ohms is too low for a coil. It would draw almost 5 amps and get very hot, 70 watts of heat.
Assuming the contacts are normally closed, then:
If one pair of wires is open, it means that either the contacts are not making contact or the coil is open.
In either case, the relay is defective.


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PostPosted: Tue Jun 29, 2021 11:13 am    Post subject: Interav OV relay: how to do an integrity test. Reply with quote

Hi Bob,
Indeed, a potted version of the device so no salvageable knowledge there!
Appreciate the feedback; this is one for the bin!
Best Regards,Bob Verwey

082 331 2727
[img]https://docs.google.com/uc?export=download&id=0B5d7rgAInTuTUUZsUjY4QmJsdVU&revid=0B5d7rgAInTuTdDJDaXRFZVh3b3lMa3FWL0s3MFdzc01YRlNvPQ[/img]      


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