MA Lin，ZHANG Qi，YAN Xi-xi
（Zhejiang Testing & Institute for Mechanical and Electrical Products Quality，Hangzhou 310027，China）
Abstract：Based on the background of air circuit breaker stands an important role in low voltage distribution system and keeps growingto intelligence，in order to ensure that this equipment can be run safely and reliably in a certain electromagnetic environment，and gain amore useful and scientific insight into electromagnetic compatibility test of air circuit breaker，EMC technology of air circuit breaker wasanalyzed and studied systematically on the basis of the international standards which were presently used. The main contents include twotypes of electromagnetic disturbances and electromagnetic sensitivity equipment under test，the level of testportsoftestmethodsoftestandcriterionwerediscussed.Theresultsindicatethatlotsofelectromagneticcompatibility test data of air circuit breaker helps toestimate potential possible problems，and their corresponding solutions may be found，which could be useful to users，manufacturers，andinterrelated testers of EMC.
Key words：air circuit breaker；electromagnetic compatibility test；electromagnetic susceptibility；electromagnetic interference