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hss1981530 发表于 2013-1-25 13:31
/ o8 k& ], E/ Q- b, E4 f如果是全极开关呢?
# z! d9 Y2 k% P3 k2 `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.
2 F4 d0 z' y7 g# o- R1 @* j你说的对。
9 `7 p. Q( |7 K6 @( a. g& rFor each placement of the measuring instrument, any switches in the PRIMARY CIRCUIT and' `+ {. \1 E, J
likely to be operated in normal use are open and closed in all possible combinations.
# S% `$ O; i! c0 SAfter applying each test condition, the equipment is restored to its original condition, that is$ X4 q# R# ^7 M
without fault or consequential damage.
+ Z' b8 a* q v1 ^全极开关就只有闭合/打开的状况。正常测试范围内要求。
1 H7 |# n* N7 D( S9 K没有要求在故障后的Touch Current 测试 |
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