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MMD > Archives > April 2014 > 2014.04.22 > 10Prev  Next


Electric Motor Operating Voltage
By Allan Rustad

[ Peter Neilson wrote in 140421 MMDigest:

> Does anyone know if there is a problem in running 110-volt motor
> equipment at 120 volts?

Regarding running a 110-volt motor on 120 volts, the motors power
consumption is related to the load it is driving.  If these are AC
motors, and line frequency is not changed, the motor RPM should be
the same.

The volts times amps [volt-amps or VA] input should be the same with
a voltage change of a few percent.  Lower voltage causes an increase
in amperes drawn, higher voltage will reduce the amps.

These small motors are not very efficient, but there should be no
trouble with a 9% voltage increase.  Chronic low voltage is a more
serious issue, leading to higher current draw and heating issues.

Allan Rustad


(Message sent Tue 22 Apr 2014, 22:09:07 GMT, from time zone GMT.)

Key Words in Subject:  Electric, Motor, Operating, Voltage

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