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发表于 2011-4-13 15:29
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yuqijun 兄弟,首先放电管肯定是满足不了基本绝缘的,就算是MOV挂接在PE上,也是有要求的,不是所有的设备都可以的。见标准如下:3 k& X. [3 U9 ]
Equipment with such a VDR bridging BASIC INSULATION shall be one of the following:
/ W+ [3 L( u K# @# |− PLUGGABLE EQUIPMENT TYPE B; or" m9 [1 Y' T- N) \2 a
− PERMANENTLY CONNECTED EQUIPMENT; or( c+ o/ M: ], N* g& c, T
− equipment that has provision for a permanently connected PROTECTIVE EARTHING0 D; N# K/ Y1 z6 H
CONDUCTOR and is provided with instructions for the installation of that conductor.4 `3 W5 O' W4 l9 R8 u
NOTE In Finland, Norway and Sweden, the third dashed item is applicable only to equipment as defined in the
0 i# n6 u b. i5 a) C _( e6 QNote to 6.1.2.2.
+ O% a7 S ?# R+ T. OCompliance is checked by inspection.
, `; V: ~+ \7 b3 h" z" I% X, m/ \ j, M) k也就是说你的产品要是那三个类型的其中之一,才可以用MOV接在PE上,否则是不行的,标准里面有明文规定。但目前机构内部自己做了一个协议,如果产品不是那三种类型的,可以用MOV和放电管串联,当然还有热保险,这样可以接到PE. |
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