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hss1981530 发表于 2013-1-25 13:31
$ _2 h4 M4 T9 ^0 d如果是全极开关呢?
5 u+ H, {1 A, m" R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 ~2 d' w% a ?" c& c
你说的对。
( F% ]5 u2 R- I& w/ a8 ?- tFor each placement of the measuring instrument, any switches in the PRIMARY CIRCUIT and
( U$ @# P6 o* s) i* P" Q9 P! p6 |8 ulikely to be operated in normal use are open and closed in all possible combinations., Z; p$ \& t; y8 H8 r9 Z! v# r
After applying each test condition, the equipment is restored to its original condition, that is, M0 L' B7 Q8 h C
without fault or consequential damage." F2 J9 T d7 e# j9 \! I
全极开关就只有闭合/打开的状况。正常测试范围内要求。
1 h1 K5 |3 i3 o7 b+ Q没有要求在故障后的Touch Current 测试 |
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