This standard specifies the classification of product quality levels, assessment content, sampling methods and inspection details for small-power motors, including single-phase asynchronous motors of 3.7 kW and below. This standard is applicable to various types of motors produced in batches and repeatedly. It is used to accurately and completely assess product quality. It is the basis for product grading, enterprise upgrading and product quality and price assessment. This standard does not apply to various types of motors produced at one time.
JB/T 50071-1999 history
1999JB/T 50071-1999 General rules for quality classification of small power motor products