The main reasons for the imbalance of three-phase currents when the motor is unloaded

1. The voltage of the three-phase power supply is unbalanced.

2. Motor-Part of the phase winding coils are incorrectly connected or reversely connected.

3. There is a short circuit in the motor windings. If it is short-circuited, the motor will heat up, accompanied by a special sound.

4. There is a short circuit in the stator winding of the motor.

Generally, it is a problem with household power supply, and the specific detection method uses phase inversion