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Thread: Compressor failure
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13-04-2006, 07:45 PM #1
Compressor failure
Can someone please tell me what the normal ohm readings should be on a 5 ton 3ph compressor, and what a typical failure reading would be? It's a Bristol/York unit. Unit has a tandum set and one single compressor. It's the single one I'm concerned with. My problem is, I just don't remember what the readings should be. You guessed it, I'm a novice. Thanks,
gil
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13-04-2006, 08:25 PM #2
Re: Compressor failure
You don't need the exact readings: all 3 windings should be the same in the order of some ohms and there may be no connection to the ground measured with a megger.
It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.
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13-04-2006, 11:08 PM #3
Re: Compressor failure
Well, a megger for a novice would sound more like a Megaohmmeter, a funny device that is useful for creating voltaic arcs and toast colleagues... not that I know anything about... stories told in the workshop
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14-04-2006, 07:24 AM #4
Re: Compressor failure
It's the only device to measure earth faults.
It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.
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14-04-2006, 07:47 AM #5
Re: Compressor failure
Originally Posted by Peter_1
Renato
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14-04-2006, 08:10 AM #6
Re: Compressor failure
Originally Posted by Peter_1
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18-04-2006, 04:57 PM #7
Re: Compressor failure
Originally Posted by Renato RR
Thank you Renato.
Gil
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23-04-2006, 02:44 AM #8
Re: Compressor failure
Gil, each compressor has it's own motor, and they all have different ohm readings for each motor. There really isn't a set "standard" ohm reading for a given horsepower compressor. Just take a look inside of Copeland's Electrical Manual, and you will see different ohm values for many, many different compressors.
Bristol could offer you the exact ohm readings if you really need them.
Question is, are you having a problem with the system that you are attempting to rectify? And what is the problem?
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27-04-2006, 02:54 PM #9
Re: Compressor failure
Originally Posted by gilbert_c
it should be about 3 ohms eqally all three terminals
sunil bhat india