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Joined: 30-July 05
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30 Jul 2005
I have just installed a second hand 3ph 7.5kw compressor, and it keeps tripping the breaker in its box on start up.
there are 3 contactors in its box, 2 of which pull in and the motor stars to turn. the motor will then trip, sometimes before the other contactor pulls in, sometimes after.
There is a timer (0-30 secs) in the box with an led which sometimes flashes if it pulls the 3rd contactor in.
The compressor ran ok at another site, all i have done is connect 2 phases and a neutral to the existing wires. Both phases are 240v.

Any ideas ?
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