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If an operator pushes a start button on a three-phase induction motor and the motor starts to hum, but not run, the probable trouble is

If an operator pushes a start button on a three-phase induction motor and the motor starts to hum, but not run, the probable trouble is Question 39 options: one fuse/overload protector is blown and the motor is single phasing the overload trip needs resetting an auxiliary contact is shorted one motor phase is grounded

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