This standard specifies the test equipment and instruments, measuring instruments, sample preparation, test methods, parameters, procedures and testing in the electrical insulation compatibility test (refrigerant + refrigerating machine oil) of electric motors (hereinafter referred to as motors) used in hermetic refrigeration compressors. and record. This standard is applicable to motors for hermetic refrigeration compressors with a power of 90kW or less working in R22, R134a, R404A, R410A, R407C, R600a and other refrigerants. The use of other refrigerants can also be implemented by reference.