對各類饋電開關、電磁起動器、真空斷路器、真空接觸器等產品進行動作試驗;三相同步測試;對各類饋電開關、電磁起動器進行漏電閉鎖阻值測試,漏電動作值測試，漏電動作時間測試;對饋電開關、電磁起動器進行過流、短路、斷相、三相不平衡保護測試。

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.