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The most critical link in the design, production, and manufacturing of high-voltage motors is the insulation structure. The rationality and manufacturing compliance of the insulation structure directly affect the performance and lifespan of the motor, and different motor manufacturers have different treatment methods.
Current transformers are important equipment in power plants and substations, and the performance of their products has a significant impact on the safe and stable operation of the power system. Factory testing is an important part of ensuring product performance. The insulation resistance test is the foundation of other high-voltage tests and is a simple and commonly used testing method.
The overall insulation of the motor consists of the following parts:
1. The inherent insulation of the wire itself;
2. Insulation between winding layers and phases;
3. Winding to ground insulation;
4. Insulation and impregnation paint for leads, connecting wires, end clamps, and windings.
The above four parts of insulation are distributed between the strands, turns, rows, phases, and ground of the coil or winding, as well as on the wrapping of wires (such as connecting wires) and end clamps. They are combined with insulation impregnating paint to form the insulation of the entire motor.
