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, e1 `. M" p3 g( U: R5 |# Q& W《UL1472 solid-state dimming control》的5.10的limited short-circuit test短路测试5 z5 \6 k* [: | x8 V
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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5.10.2 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
- U9 e) K, _: L3 Y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。" J6 P1 k5 h7 S* d3 v
我这样理解不知道对不对:* |; H, @, v# M; V0 Y
(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。' y P, M# n. ?$ I8 {4 I
(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。6 e Y, P! S# c0 i
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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。
+ g, m! @4 I$ r: r0 B还有metal flush-device box和metal flush-device cover plate.究竟是什么东西???# Y. V0 a1 z" F$ v$ G, v
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