标准60950里的2.7章的内容

June.Zhao · 发表于 2011-5-27 10:49

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
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

是否就是不加保险丝的豁免依据？

jianfie · 发表于 2011-5-27 11:37

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 · 发表于 2011-5-27 13:21

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。
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。

菜鸟浅见，坐等高手。

June.Zhao · 发表于 2011-5-27 13:22

还望高手指导一下~

山炮 · 发表于 2011-5-27 13:32

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 · 发表于 2011-5-27 14:04

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 · 发表于 2011-5-27 15:49

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：
2.7.1 Replace the subclause as follows:
Basic requirements
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, subject to the following, a), b) and c):
a) 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;
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;
c) it is permitted for PLUGGABLE EQUIPMENT TYPE B or PERMANENTLY CONNECTED
EQUIPMENT, to rely on dedicated overcurrent and short-circuit protection in the
building installation, provided that the means of protection, e.g. fuses or circuit
breakers, 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
be 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 · 发表于 2011-5-27 16:47

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？）
最新版的标准是哪个版本？

June.Zhao · 发表于 2011-5-27 17:34

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
怎么理解？

茶馆 · 发表于 2011-5-28 11:10

引用第8楼June.Zhao于2011-05-27 17:34发表的 :8 E8 y# n6 s/ F0 `% O
那标准里的这句 for PLUGGABLE EQUIPMENT TYPE A the building installation shall be
& x6 Y4 Z1 t7 t+ {) @regarded as providing protection in accordance with the rating of the wall socket outlet
9 N; Q: l; ~& Z2 _怎么理解？

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。

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[电源产品] 标准60950里的2.7章的内容