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hss1981530 发表于 2013-1-25 13:31 & a! \+ k4 x |
如果是全极开关呢?1 Z% z" b2 l, h# A% w0 u2 d. Y; T6 j
单极开关的开合是属于正常测试的一部分的,不属于故障条件.
/ n! J! O5 G8 e2 S$ ?/ ?, X0 z; L你说的对。
( F: z7 I+ u" k% JFor each placement of the measuring instrument, any switches in the PRIMARY CIRCUIT and, S5 _& |6 N' P& x4 z- S+ B
likely to be operated in normal use are open and closed in all possible combinations.
( c1 \. k0 Q# v# q3 f) kAfter applying each test condition, the equipment is restored to its original condition, that is
; n9 j' i$ G c+ f5 Q( r2 uwithout fault or consequential damage.
; a2 ~! R, D2 h% I全极开关就只有闭合/打开的状况。正常测试范围内要求。
3 a5 m$ \0 D, `5 M3 H5 I, Y% [5 t没有要求在故障后的Touch Current 测试 |
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