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. M5 j- o5 c5 S d9 t《UL1472 solid-state dimming control》的5.10的limited short-circuit test短路测试
, \+ ?# S- w! M* L5.10.1 six samples of a dimmer in the as-receiced condition are to be tested in series with a 30-ampere nonrenewable,non-time delay,cartridge fuse rated for branch circuit overcurrent protection on an alternating-current circuit of rated voltage capable of delivering 1000 amperes peak when the system is short-circuited at the testing terminals。后面省略+ q+ p+ \1 d% P, A, ]
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5.10.2 each sample is to be installed in a metal flush-device box mounted in the fixture illustrated in figure 3,and covered with a metal flush-device cover plate,unless a noninterchangeable cover is provided with the dimmer.the enclosure and any otherexposed dead metal are to be connected to ground through a 15-ampere nonrenewable,non-time delay,cartridge fuse rated for branch circuit overcurrent protection. 后面省略
3 V/ K: U( z! g! u请教这个短路测试该怎么理解,怪我英语不好理解起来真困难。
3 b0 |/ [1 `& h9 s我这样理解不知道对不对:
6 o" w' `6 a% x* z(1)先把调光器串联一个30A不可恢复无延迟的cartridge fuse,在连到1000A的电流源上,短路测试端子。
# \7 |, d5 u9 w2 O+ B% G5 X2 d(2)调光器安装方式:安装到metal flush-device box里,表面用metal flush-device cover plate覆盖。外壳和任何暴露的金属部件通过15A不可恢复无延迟的cartridge fuse连接到地。 P+ m# F6 f# @% P% z6 l
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如果是按照我上面这样理解的,那连通了1000A的电流源后,串联的30A保线丝不是一下就断了吗?还使用1000A的电流源做什么用???而且这个1000A的电流源也太大了吧。8 s1 v3 P( |- l6 I
还有metal flush-device box和metal flush-device cover plate.究竟是什么东西???1 k3 \. L g8 q. W# ~
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