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hss1981530 发表于 2013-1-25 13:31 2 N0 N3 o9 Y$ e. `% Q
如果是全极开关呢?
* ]8 g' I# P/ d" W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. 0 M) a& u8 z; x) F7 W" R
你说的对。
% O; Q1 v4 s. o: z+ l7 rFor each placement of the measuring instrument, any switches in the PRIMARY CIRCUIT and
# g# _- A5 i( \* v3 A( _4 xlikely to be operated in normal use are open and closed in all possible combinations.7 I7 @$ i; \3 T# Z% [& C& [
After applying each test condition, the equipment is restored to its original condition, that is% J6 g* K i# U
without fault or consequential damage.1 f# P1 B0 x6 x+ V3 X- l
全极开关就只有闭合/打开的状况。正常测试范围内要求。( O7 [) }, f/ G9 z. `! h6 q, f
没有要求在故障后的Touch Current 测试 |
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