The rated voltage is below 1000V, and the insulation resistance value at room temperature should not be lower than 0.5MΩ; the rated voltage is 1000V and above, converted to the insulation resistance value at operating temperature, the stator winding should not be lower than 1MΩ/kV, and the rotor winding should not be lower At 0.5MΩ/kV
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