Air compressor not running at full capacity

by Shane Lacy
(NSW Australia)

I have a customer who runs a small tyre repair work shop, his 3ph air compressor is still running and working but when it fires up it seems to be a bit sluggish. The tyre shop owner says that it only seems to run (going by the noise of the compressor) about half pace.
I've done voltage checks and it only pulls about 6 amps per phase and the voltage drops about 2-3 volts when its running.
Has anyone experienced this sort of thing before.

Comments for Air compressor not running at full capacity

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May 11, 2017
Compressor under capacity
by: Bill

If nothing has changed in the power supply to the compressor, then see the page on this site about how to check compressor motor capacitors.

It sounds like that may be the problem.

If not, eliminating that as the problem will help narrow in to the issue.

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