A.負載B.電網(wǎng)C.發(fā)電機D.岸電
A.能損制動B.反向制動C.再生制動D.反接制動
A.如無過電流而延時脫扣B.立即因接地保護而脫扣C.如無其它故障而不脫扣D.立即因短路電流而脫扣