Situation:
50 HP motor, 45 FLA, 3550 RPM, resistance of windings .33 - .35 ohms.
This motor is drawing 58-60 amps when running a chilled water pump, needless to say it will trip the OLs. Removed the coupling from the motor and pump, amps drop to 10-11 amps. Pump appears to turn freely by hand. Discharge of the pump when running is 80-85 psi. Motor checks are all fine...installed a new motor of the same size...still having the same issues. One would think it would be the pump but with it moving so freely...I'm kinda confused...any help??? Thanks for your ideas.
50 HP motor, 45 FLA, 3550 RPM, resistance of windings .33 - .35 ohms.
This motor is drawing 58-60 amps when running a chilled water pump, needless to say it will trip the OLs. Removed the coupling from the motor and pump, amps drop to 10-11 amps. Pump appears to turn freely by hand. Discharge of the pump when running is 80-85 psi. Motor checks are all fine...installed a new motor of the same size...still having the same issues. One would think it would be the pump but with it moving so freely...I'm kinda confused...any help??? Thanks for your ideas.