The protection level of the generator depends on the heat resistance level of the insulation material used. If the insulation structure of the key parts of the motor uses insulation materials of different heat resistance levels, the protection level should be tested according to the highest heat resistance level of the insulation materials. There is no superior or inferior protection level of the generator, depending on the operation. Professional diesel generator manufacturer Dingbo Electric power introduces the meaning of insulation level in the Yuchai Generator Set Manual.
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