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rodelectrician

01:33PM | 08/09/09
Member Since: 08/08/09
1 lifetime posts
Bvelectrical
We installed a new refrigeration system in our shop, there's 4 compressors, 1 for each cooling/freezing unit, they're all protected by independent circuit breakers and all the same size

One of the compressors trips the circuit breaker quite often, the rating is good and that is the only one that trips since we installed the system

I realized the failing compressor is for the coldest unit, and also is the one with the longest distance between compressor and unit

I'm assuming that the distance between compressor and unit is too long which causes too much friction loss therefore the compressor needs to work harder and probably overloaded

If you guys have any other sugestions I'll aprecite it

Thanks

PS English is my second language, sorry if I can't explain myself properly

TimBonham

11:55PM | 08/10/09
Member Since: 01/09/07
197 lifetime posts
One quick way to check this out is to switch the circuit breaker that keeps tripping with one of the other ones.

If that stops it from tripping, then that one breaker is bad -- replace it. But most likely, the switched breaker will continue to trip just like the other one. Then it's not a breaker problem, but likely an overload like you thought.

Ichabod

04:08AM | 08/18/09
Member Since: 07/17/09
2 lifetime posts
Does it trip when starting or while running? Are these single phase motors? If so I would check the motor start and run capacitors. If it doesn't have a start capacitor then a hard start kit might help. Need to make sure the motor isn't trying to start without adequate time for the head pressure to equalize.

Ichabod
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