A.1A B.1.5A C.3A D.4A
A.三個相電流有效值相等 B.三個相電壓相等且相位角互差120° C.三個相電流有效值相等,三個相的相電壓相等且相位角互差120° D.三相負(fù)載阻抗相等,且阻抗角相等
A、直接轉(zhuǎn)動量程開關(guān) B、先將鉗口打開,再轉(zhuǎn)動量程開關(guān)