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. y: }' p; ]# A- Y# T1 @4 L《UL1472 solid-state dimming control》的5.10的limited short-circuit test短路测试6 f! e# K8 j. T/ w
5.10.1 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 R9 D x$ H* j1 g# l1 a1 [
9 k+ H$ F- Y+ k+ x5.10.2 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
- M4 c3 G- Z) {+ v* H. \# D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。+ W0 v' A# a0 o5 g1 `2 Y
我这样理解不知道对不对:
6 f9 |! B P7 X(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。0 H# @( `) W2 a7 W: O5 j/ V
(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。 V' C0 i' E9 ?1 @
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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。" V& {; P, r6 s x" C
还有metal flush-device box和metal flush-device cover plate.究竟是什么东西???
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