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《UL1472 solid-state dimming control》的5.10的limited short-circuit test短路测试
* m+ w% T: g2 S _7 J+ n! \1 L3 |" ~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
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5 v7 R$ ~+ @; ^+ R3 L5.10.2 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7 O3 D4 E& M8 Q" ~
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。
: Y; U( Y: [. Y/ q我这样理解不知道对不对:8 l2 _! i. f% Z( g4 t1 L
(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。
5 U7 o6 ?. l: k6 R& F% ]- A(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。
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( s. ?& j3 r8 p/ X4 R# O8 G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。
) I& w5 @. B6 g v还有metal flush-device box和metal flush-device cover plate.究竟是什么东西??? @; z) P% W! j) G5 \ {. ~
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