Hello everyone
I have a single phase, capacitor start /capacitor run 2400w/2200 r/m 240v motor. There is a run winding (res .9ohm) and start/run winding (1.8 ohm res), It was off an air compressor.
2 capacitors - 100mfd start and 35mfd run.
The centrifugal switch works fine and cuts out the 100mfd capacitor from circuit when increasing r/m.
It pulls in excess of 15A when up and running on no load.
There is no visual evidence of shorted windings nor an expensive smell.
The bearings are fine and the rotor spins freely
I've replaced the run capacitor with no change.
To get it to run without blowing 15A fuses I seriesed up a 3.3ohm high wattage resistance with the motor and it runs OK but pulling abt 10A .
The voltage measured across the resistor is 80V and across the motor is 160V. Revolutions were as per nameplate.
Before I condemn the motor to the scrap heap has anybody come accross a similar rated motor with such low winding resistances?
Cheers Peter
I have a single phase, capacitor start /capacitor run 2400w/2200 r/m 240v motor. There is a run winding (res .9ohm) and start/run winding (1.8 ohm res), It was off an air compressor.
2 capacitors - 100mfd start and 35mfd run.
The centrifugal switch works fine and cuts out the 100mfd capacitor from circuit when increasing r/m.
It pulls in excess of 15A when up and running on no load.
There is no visual evidence of shorted windings nor an expensive smell.
The bearings are fine and the rotor spins freely
I've replaced the run capacitor with no change.
To get it to run without blowing 15A fuses I seriesed up a 3.3ohm high wattage resistance with the motor and it runs OK but pulling abt 10A .
The voltage measured across the resistor is 80V and across the motor is 160V. Revolutions were as per nameplate.
Before I condemn the motor to the scrap heap has anybody come accross a similar rated motor with such low winding resistances?
Cheers Peter
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