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hss1981530 发表于 2013-1-25 13:31 3 D7 b$ [1 H- S. x4 E
如果是全极开关呢?
/ V2 J+ J! \" c2 ~0 G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.
3 w% p2 r1 \" K- ]你说的对。' n3 B1 I, ^+ x" x! u# G
For each placement of the measuring instrument, any switches in the PRIMARY CIRCUIT and
. B0 w( J5 `' H- W) I/ elikely to be operated in normal use are open and closed in all possible combinations.% l$ S( ?% f! P5 Z6 {$ p, t
After applying each test condition, the equipment is restored to its original condition, that is/ X4 u+ t/ `9 [# z* G
without fault or consequential damage.
- z# v9 D% S8 s: n4 B4 ]全极开关就只有闭合/打开的状况。正常测试范围内要求。8 C; f: {, w$ I1 ^% N+ P: x
没有要求在故障后的Touch Current 测试 |
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