Aiming at the problems of various kinds of AC contactor electrical life test,long life test time,long life prediction and reliability analysis cycle obtained from the whole life test data,a double-circuit electrical life test system for AC contactor was developed.Two kinds of different specifications,different types of AC contactor electric life testing on the system main circuit and the test sequence control is designed,and the control software is designed to complete automatic characteristic parameters extraction,sample failure criterion and equipment failure protection.At the same time,the interlock active drive circuit is designed,the hardware wiring is optimized to effectively prevent the power short circuit,and the performance characteristic parameters of the contactor are extracted by the dynamic threshold discrimination method,so as to improve the equipment reliability and test parameter detection accuracy.The system can effectively improve the measurement precision of characteristic parameters and shorten the product test period.
