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《UL1472 solid-state dimming control》的5.10的limited short-circuit test短路测试
, s7 u( ~+ v, v$ a5.10.1 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" t/ X" T8 {: C( u: c6 n
4 f+ r& `- C4 B& N! z6 p6 ^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
) L; ]6 z& C7 M! S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。" M7 N- Q& E& P" X2 N1 H4 e8 u6 T
我这样理解不知道对不对：
9 G) T- ]+ m6 K$ p' ~& J2 V（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 g" Q0 k W9 a1 }
（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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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。5 g$ D' X! Y- H$ w
还有metal flush-device box和metal flush-device cover plate.究竟是什么东西？？？
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发表于 2013-5-22 11:41
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发表于 2013-5-22 12:18
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