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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:& u. I; m1 f/ F! L6 L
Equipment with such a VDR bridging BASIC INSULATION shall be one of the following:7 q: V5 Q {5 _& }) T1 s7 {: _
− PLUGGABLE EQUIPMENT TYPE B; or* ~" ~; _& W; H7 F" m4 k
− PERMANENTLY CONNECTED EQUIPMENT; or* Q' [& |% ~8 j$ N7 D( E
− equipment that has provision for a permanently connected PROTECTIVE EARTHING) [* t3 t; a/ r. {
CONDUCTOR and is provided with instructions for the installation of that conductor.$ a9 f, g T2 x& Q! D/ I
NOTE In Finland, Norway and Sweden, the third dashed item is applicable only to equipment as defined in the# Z$ s# a. I. ^
Note to 6.1.2.2.( h- i' k# G4 v0 N& C: b( t* G! k
Compliance is checked by inspection.& x5 H8 C. n! \2 ?/ v a+ F
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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