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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:
6 q' b1 }' t6 }/ w( iEquipment with such a VDR bridging BASIC INSULATION shall be one of the following:
5 \* P* S1 ~: E4 O* [ w7 Z− PLUGGABLE EQUIPMENT TYPE B; or- ^7 P3 [4 b: @' D5 ^6 v3 _* V3 G
− PERMANENTLY CONNECTED EQUIPMENT; or0 B- l/ v4 T$ s7 N" C
− equipment that has provision for a permanently connected PROTECTIVE EARTHING
( ?+ R+ I9 S: p( u$ L- KCONDUCTOR and is provided with instructions for the installation of that conductor.
3 C+ M! H @- _% iNOTE In Finland, Norway and Sweden, the third dashed item is applicable only to equipment as defined in the7 G% y3 c( P# W/ T% o
Note to 6.1.2.2.0 T9 h' }9 D9 P' g( X
Compliance is checked by inspection.
& N, U: {" g& R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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