Motor burning machine judgment standard
The motor burning machine judgment criteria are as follows:
1 phase loss
the reason:
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.
feature:
One or two phases (four stages) in the winding are all blackened, the coils are damaged symmetrically, and there are rules for phase loss.
2 overload
the reason:
Generally, the motor runs for a long time without overcurrent, overheating, frequent starting or braking, and wiring errors also cause (triangulation is connected to the star).
feature:
The windings all turn black and the end ties are discolored and become brittle or even broken.
3 gate
the reason:
The enameled wire caused by the motor manufacturing process is broken.
feature:
The winding is partially blown. Usually, when the motor cavity is clean, there is only one explosion point.
4 phase
the reason:
The phase paper is not in place, or the phase paper (casing) is broken.
feature:
The two phases of the motor burned out adjacent to each other.
5 ground strikes
the reason:
There is not enough distance between the coil and the end cap base.
feature:
There are black marks between the coil and the end cap or end cap.
