Hello all,
I have a 10hp 3 phase 230V AC motor powering a dust collector that is experiencing a voltage drop/amp increase when running. The motor is rated at 30amp running current and the actual voltage being supplied is 208v. The wiring to the motor is 8/4 SO and runs about 50ft from the breaker panel to the motor. The motor is controlled by a starter and thermal overload relay.
I noticed the starter and relay getting very hot while the motor is running so I recently replaced both of them. After replacing the starter and relay, the motor continues to draw more amps and lower voltage while running. The measured voltage at the starter is 208v when the motor is off. After the motor has been running for a minute or so the measured voltage is around 202-204v and the amperage measured on each phase is around 34-35amps which exceeds the rating on the nameplate for the motor.
I am worried about continued overheating possibly damaging the motor and starter/relay. Is there anything else I can check for before removing the motor itself to have it checked for a winding issue?
Thank you
I have a 10hp 3 phase 230V AC motor powering a dust collector that is experiencing a voltage drop/amp increase when running. The motor is rated at 30amp running current and the actual voltage being supplied is 208v. The wiring to the motor is 8/4 SO and runs about 50ft from the breaker panel to the motor. The motor is controlled by a starter and thermal overload relay.
I noticed the starter and relay getting very hot while the motor is running so I recently replaced both of them. After replacing the starter and relay, the motor continues to draw more amps and lower voltage while running. The measured voltage at the starter is 208v when the motor is off. After the motor has been running for a minute or so the measured voltage is around 202-204v and the amperage measured on each phase is around 34-35amps which exceeds the rating on the nameplate for the motor.
I am worried about continued overheating possibly damaging the motor and starter/relay. Is there anything else I can check for before removing the motor itself to have it checked for a winding issue?
Thank you