Motor buzz

[jarvis]

I have a motor which buzzes and turns slowly. It had a bad capacitor which I replaced with a very old one of the same capacitance and tests good(not shorted or open) except I cannot test the leakage current and don't know what it should be.

Would a capacitor with too high leakage cause this, or has a coil burnt out.

P.S. It is out of a small "Little Giant" magnetic drive water pump

Ben Englund

 

[jbartos]

Suggestion: Please, post nameplate data

 

[jarvis]

The pump is a Little Giant 4-MD-SC
thermally protected,open,fan cooled
permanent split capacitor motor
.1 HP
115VAC
60 HZ
1.7 AMPS
185 WATTS

 

[digitrex]

Testing of small ac capacitor.

It is a small ac capacitor and with this size, I would simply use a 250V or 500V insulation tester(Megger) to test for its dielectric property.

 

[jbartos]

Suggestion: A dc power supply about 100VDC to 150VDC and a suitably ranged ammeter will measure the capacitor leakage current.