What is "layer short"?

QWhat is a layer short? (Impulse Tester ST4030A)


The windings of the coil (including the motor) must be insulated by a coating (enamel). But for some reason, the insulation resistance decreases and a short circuit may occur. This is called a layer short.

Principal causes of layer shorts
- Deterioration of the insulation coating due to heat (overload, motor locking, etc.)
- Damage to the insulation coating during the manufacturing process of the motor
- Insulation degradation due to vibration
- Dust contamination, age-related deterioration, etc.

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