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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 C' U W+ h" r- u
Equipment with such a VDR bridging BASIC INSULATION shall be one of the following:( Z2 G; d7 r- `2 D3 j: Z
− PLUGGABLE EQUIPMENT TYPE B; or- y9 D! J0 g% F& |1 g6 @
− PERMANENTLY CONNECTED EQUIPMENT; or5 Q! x1 x& p" O, f& @9 T) @& H+ X* Y
− equipment that has provision for a permanently connected PROTECTIVE EARTHING
# V& K7 ]2 F5 ?( b# SCONDUCTOR and is provided with instructions for the installation of that conductor.0 r2 M7 ~$ n9 }# I7 [& d1 J5 |
NOTE In Finland, Norway and Sweden, the third dashed item is applicable only to equipment as defined in the/ T$ v7 }# P& _0 m& d. A* Q( `
Note to 6.1.2.2.9 b! K8 C8 U1 V; ^) B+ q
Compliance is checked by inspection." U( g' P2 ^. U% t
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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