CJ20-40 AC contactor emerged sticking phenomenon
in the course of practice using. In this paper, electrical
contact material parameter tester is used to test the
electrical contact performance of the AC contactor’s
contact material. The curves of the bounce times, arcing
energy, arcing time, contact resistance and welding
strength are obtained. The test results are the same with in
practice using. In order to verify the accuracy of test
results, we chose the 25A and 160A of the AC contactor
for the same test. So, we can determine that the reason
causes the CJ20-40 AC contactor welding is the result of
welding strength increases.