How to judge motor damage

1, the relative insulation resistance is unqualified or zero, so it can be judged that there is winding breakdown or grounding.

2. If the interphase insulation is not zero or infinite, it can be judged that the motor is burnt out or out of phase.

3. The phase-to-phase direct resistance is unbalanced, so it can be judged that there is turn-to-turn short circuit in the phase-to-phase winding.

Mainly from the insulation and resistance to judge.