This standard specifies the humid heat test method, technical requirements and inspection rules of the rotating electrical machine for service in general environmental condition.
This standard is applicable to all kinds of rotating electrical machines (except mini-type control machine, hereinafter referred to as electrical machine). According to GB 755, the electrical machines in the environment where the relative humidity of service environment is: the average relative humidity in the wettest months is 90% and the average minimal temperature in that month is not higher than 25℃ shall meet the requirements of this standard.
