|
: M0 c. I+ X" B
《UL1472 solid-state dimming control》的5.10的limited short-circuit test短路测试1 K) K/ A1 z& \! a; s
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
: q, X" l/ C. E7 Q+ a( v0 s9 ^4 J; q2 k: z8 Z! j
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$ C5 y" N7 T- }/ x
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。9 s Y, Q' L: B; M" G
我这样理解不知道对不对:, ^7 U) E! R% Q. \( ]8 b
(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。
+ p B2 H. _, C" h3 z. k* l8 N" M(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 A4 u$ I% H9 M
* D ^ C0 {) D' d& R7 s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。
" U9 e& w4 z1 @+ ]8 l8 h还有metal flush-device box和metal flush-device cover plate.究竟是什么东西???
# P! ^3 u' D7 v5 k* a" @ |
本帖子中包含更多资源
您需要 登录 才可以下载或查看,没有帐号?注册安规
x
|