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light229 发表于 2010-4-27 09:04 , S& k c2 K- ?1 F& S d& f
医疗标准的 56.5 怎么样理解:$ u2 u8 G, w5 V* a" O
是不是不能用因为短路电流引起保护动作的电流保险丝?- f' {* r, {: o$ a7 A. [
谢谢啦 + N6 G+ p" A& D; `% k
个人认为不是这个意思。" w# M- g2 U- k: f/ n. t% A: `
应该指的是设备上使所有各极同时与供电网分断的装置,不可以使用类似电流保险丝这样的保护装置来达到与供电网分断的目的。但是设备里面是可以使用电流保险丝的,只是说要额外使用一些分断装置,比如开关、inlet或电源插头之类的东东。
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5 E, x# S! F7 z- H至于为什么不能用这样的保护装置来达到与网电分断的目的,理由请见IEC 60601-1:2005 附录A,Rationale部分的subclause 8.11.1 h),如下:5 z- D, R; W; }+ m# F: p0 C
Such a protective device whether or not it caused the operation of an over-current protection7 w% r1 y# E; C1 W5 R
device built into the ME EQUIPMENT, would be likely also to cause a fuse or circuit breaker in# t" S9 M E( A& p; j$ D
the installation to operate, thus removing the supply of power to other ME EQUIPMENT, possibly% x2 T: d. w {/ u4 u
including life-support ME EQUIPMENT. Such a device might also cause undesirable thermal9 x' Z d' z* i( L; ?, W
effects inside the ME EQUIPMENT and might anyway not be a reliable method of protecting
. ^- @/ V! S. D; d5 q) l) gagainst the relevant HAZARDS. |
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