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: `# W& p" |0 w. s0 J% A; a1 j《UL1472 solid-state dimming control》的5.10的limited short-circuit test短路测试
3 ]' |, Z& G5 h* {0 q. O5.10.1 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4 ~6 T P4 |/ W: O
5 z% B+ Q# b+ b2 \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6 d9 S% `. N# A1 `" _; `9 ]! k5 U4 l
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。1 t/ D1 I! n1 i; v# W& B
我这样理解不知道对不对:
- o7 \/ ^: T% \0 e+ m(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 [) a9 N! A/ Q) }(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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0 J' T6 n& c, T* g, ~- a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。* d* ~) }9 I& c; w- s% r. P: E
还有metal flush-device box和metal flush-device cover plate.究竟是什么东西???( T8 D& c; p' o$ q6 b
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