A.負(fù)荷電流 B.短路時(shí)超負(fù)荷 C.短路時(shí)的熱穩(wěn)定 D.雷擊強(qiáng)電流
A.0.5%~1% B.1%~1.5% C.1.5%~2% D.2%~2.5%
A.5m B.10m C.15m D.20m