Power electronic metallization capacitor formed by resin encapsulation has such features as light weight

high insulation strength of case and convenient installation.However

the volume is changed due to different expansion coefficient in case of temperature variation of internal material in the temperature variation

thus causing such quality problem as case breakage and moisture penetration into capacitor in the wet and humid condition

therefore its mechanical performance and ability to withstand environmental stress shall be verified and checked.In this paper

multiple parameters and specific test items are defined in accordance with related standards

service condition

and the parameter requirement of re sin enc apsulated forming capacitor as well as weak points

which is used for verifying whether such capacitor can meet application in rail transportation.Finally

the reliability of the resin enc apsulated c apacitors is verified by the tests.