对各类馈电开关、电磁起动器、真空断路器、真空接触器等产品进行动作试验;三相同步测试;对各类馈电开关、电磁起动器进行漏电闭锁阻值测试,漏电动作值测试，漏电动作时间测试;对馈电开关、电磁起动器进行过流、短路、断相、三相不平衡保护测试。

Carrying out operating test and 3-phaseynchro testof various feedingswitches,elec-tromagneticstarters,vacuum breakers,nacuumcontactors,etc;operating valuetest on earthleakage lockout,operatingvalue test onleakageand operating time test on leakage of variousfeed-ing switches and electrimagnetic starters;andprotection test on overflow,short circuit,loss of phaseand unbalanced three phases of electromag-netic starters.