A.中性點(diǎn)接地 B.中性點(diǎn)不接地 C.中性點(diǎn)經(jīng)消弧線圈接地
A.4% B.5% C.10% D.1%
A.電壓 B.頻率 C.功率因數(shù) D.諧波