标准60950里的2.7章的内容

June.Zhao

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  初级电路是否需要过流保护呢？
标准里写到：To protect against excessive current, short-circuits and earth faults in PRIMARY CIRCUITS,protective devices shall be included either as integral parts of the equipment or as parts of the building installation
4 O+ j3 W$ @( U  C既可以加保护装置又可以依靠建筑安装的“跳闸”保护
还有：For PLUGGABLE EQUIPMENT TYPE A, the building installation is considered as providing short circuit backup protection
( Z1 u! ^" \0 D
是否就是不加保险丝的豁免依据？

jianfie

习惯于看国标，才发现2.7章4943和60950内容差别这么大。等高手解答

Jannie

CENELEC的成员要求产品里面要有保护装置，产品的市场就会很受限制。
+ v6 z* z' s/ g6 c; b. m$ h个人理解，在其它国家，没有保险丝，但是说明书里有特别的声明，还是可以满足要求的。
% B& b# Y+ R. Y8 V& w
5 N* ^' }: |  b菜鸟浅见，坐等高手。

June.Zhao

还望高手指导一下~

山炮

GB4943说是B型可插式和永久连接式的可以那么干，按要求说明了就行。

June.Zhao

关键现在样品大都是 PLUGGABLE EQUIPMENT TYPE A
如果跳闸可以作为保护装置的话，进行模拟故障时，跳闸也算是满足标准要求了

安规007

这个你要看BS EN60950-1 最新版才可以，和IEC是不一样的，2.7.1这部分内容曾经被取消掉过，后来又恢复了，内容如下：
) S, K; f% d* j! X1 r3 C. u2.7.1 Replace the subclause as follows:
9 }0 Z: G. a0 C: j* @6 M9 mBasic requirements
- o4 \6 ~6 {' q7 dTo protect against excessive current, short-circuits and earth faults in PRIMARY CIRCUITS,
" d! ^* x: p  P& Jprotective devices shall be included either as integral parts of the equipment or as parts of
the building installation, subject to the following, a), b) and c):
& e" O( }* J$ C; Xa) except as detailed in b) and c), protective devices necessary to comply with the
requirements of 5.3 shall be included as parts of the equipment;
& x. d) }1 @" j+ `( F, `b) for components in series with the mains input to the equipment such as the supply
cord, appliance coupler, r.f.i. filter and switch, short-circuit and earth fault protection
may be provided by protective devices in the building installation;
9 P: m: e0 p* G7 cc) it is permitted for PLUGGABLE EQUIPMENT TYPE B or PERMANENTLY CONNECTED
" `  s4 C1 U$ X# `( ~' {EQUIPMENT, to rely on dedicated overcurrent and short-circuit protection in the
# t' S+ P+ t, }building installation, provided that the means of protection, e.g. fuses or circuit
  U0 Y2 `6 h3 K( ]& ]' {- q- Hbreakers, is fully specified in the installation instructions.
If reliance is placed on protection in the building installation, the installation instructions
shall so state, except that for PLUGGABLE EQUIPMENT TYPE A the building installation shall
, |# n! D9 u& s! J) K/ \* Nbe regarded as providing protection in accordance with the rating of the wall socket outlet.
由其中的a点 shall be included as parts of the equipment;这样的字眼可以看出，产品内部还是必须有保护的，当然不一定是fuse.

狼行成双

什么时候恢复的？我在最新版本的EN60950-1:2006标准中没有找到这些条款，旧版本中却找到一样的。难道是我的最新标准不够新（恢复条款前的版本？）
2 }' O0 l. m' H! Y0 n最新版的标准是哪个版本？

June.Zhao

那标准里的这句 for PLUGGABLE EQUIPMENT TYPE A the building installation shall be
regarded as providing protection in accordance with the rating of the wall socket outlet
) i' b" T. p1 y, _- {( [1 L怎么理解？

茶馆

引用第8楼June.Zhao于2011-05-27 17:34发表的  :
. S5 ?) ^2 m, i+ r那标准里的这句 for PLUGGABLE EQUIPMENT TYPE A the building installation shall be
) Q4 K- Q9 }- C/ _regarded as providing protection in accordance with the rating of the wall socket outlet
* ^3 {# G8 I. i* k% Y$ O, Z  r怎么理解？

6 ^7 u6 }4 `8 {* U' |If reliance is placed on protection in the building installation, the installation instructions
shall so state, except that for PLUGGABLE EQUIPMENT TYPE A the building installation shall
be regarded as providing protection in accordance with the rating of the wall socket outlet.

貌似理解有些偏差。