Motor burning machine judgment standard
1 lack of phase
Cause: Generally, the power supply is out of phase (one phase is not supplied or the power supply voltage is insufficient) or the contact point of the contactor in the line is not closed, the wire connection point is disconnected, loose or contact position oxidation occurs.
Characteristics: One or two phases (four stages) in the winding are all blackened, the coil is damaged symmetrically, and there are rules
For lack of phase.
2 overload
Reason: Generally, the motor runs for a long time, overheating, overheating, frequent starting or braking, and wiring errors (triangulation is connected to the star).
Features: The windings all turn black and the end ties are discolored and become brittle or even broken.
3 days
Cause: The enameled wire caused by the motor manufacturing process is broken.
Characteristics: The winding is partially blown. Usually, when the motor cavity is clean, there is only one explosion point.
4 phase
Cause: The phase paper is not in place, or the phase paper (casing) is broken.
Features: The two phases of the motor burned out adjacent to each other.
5 ground strikes
Cause: The distance between the coil and the end cap base is not enough.
Features: Between the coil and the end cap or end cap, there are black marks on both sides.
