A.固體絕緣的爬電 B.絕緣油中有氣泡 C.懸浮金屬件對(duì)地放電 D.被試設(shè)備表面贓污放電
A.100%~120% B.110%~120% C.120%~140% D.140%~160%
A.6h B.12h C.24h D.48h