General specification Cold insulation resistance of the motor conductive part to the housing is no less than 100m¦¸ Insulation dielectric strength:the conductive part and the housing of the motor with stand 500v lasting 1min. For pressure proof experiment but can not be punctured, when the rated voltage¡ü60v; The conductive part and the housing of the motor with stand 1500v lasting 1min. For pressure proof experiment but can not be punctured, when the rated voltage>60v. Temperature 75k Noise 55db.