Sullair ES-6 compressor
Question
I have operated a Sullair rotary screw air compressor (ES-6 series) for over three years (the compressor is likely 6 years old). Last week the compressor shut down with a motor overload alarm. Checking the amperage, it is briefly running at an amperage almost three times what it should be running. I'm at a loss as to why the amperage is up on the compressor.
1 Answer
When does this occur? During normal loaded running? Or when switching from unloaded to loaded?
Please try rotating the motor/screw element by hand. Do you feel any 'high points'? It should run smooth all way round.
If screw runs smooth, then I think it should be ok.
Next, check the motor isolation with a 'megger' or 'mega-ohm meter'. It is a multimeter which works at high voltage (around 1000 volts) to measure the resistance of the motor isolation. It should be in the mega-ohms.
Good luck and love to hear how this works out!
Cas
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