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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:
" o3 @( {7 O3 @$ Y( P4 s, i! OEquipment with such a VDR bridging BASIC INSULATION shall be one of the following:. T8 }" h, P7 y, e. R8 K
− PLUGGABLE EQUIPMENT TYPE B; or
6 m9 S5 k! X, ^* c) _; Q V" c2 z− PERMANENTLY CONNECTED EQUIPMENT; or
+ A( B4 v: z! P6 C( V− equipment that has provision for a permanently connected PROTECTIVE EARTHING
" ?& w& f! d3 s# }CONDUCTOR and is provided with instructions for the installation of that conductor.
" ~9 J8 G- H9 tNOTE In Finland, Norway and Sweden, the third dashed item is applicable only to equipment as defined in the2 M6 A- f& `2 B' D6 |
Note to 6.1.2.2.: T1 ^1 H7 C: s& x* m# \
Compliance is checked by inspection.; H9 E9 W3 h- s4 y! B; d, W; T. 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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