Contact shape on mine AC contactor electrical contact reliability of

Contact shape on mine AC contactor electrical contact reliability of Xi'an Jiaotong University, Guo Fengyi , Wang Qiping Fuxin Mining Institute Sun Hexu Abstract According to the theory of electrical contacts , respectively, three different structural shapes contacts electrical power transformers analysis, from both indoor and outdoor environments obtained test results and theoretical analysis , H-type contacts in electrical contact with the best performance , overhead electrical Electric energy meter break contacts worst performance . Keywords contacts , electrical contacts , contact resistance, shrink resistance , membrane resistance , electrical conductivity spots, four-terminal method at the beginning of electrical electrical contact is an important theoretical basis and key technologies, and Voltage stabilizer the electrical contact switch electrical important functions , namely on the circuit off conversion. Electrical contact theory is scientific community in recent years, much national attention , mainly because industrial production of complex electrical equipment due to the high reliability requirements . As we all know , a large electrical equipment and security systems are often a combination of a variety of devices , and the complexity of the increasingly high number of electrical contact them often thousands , if there was one or several contacts is not normal or failure will lead to the production systems disorders.