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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: l5 }+ P' ]( k3 t! [5 J7 S
Equipment with such a VDR bridging BASIC INSULATION shall be one of the following:9 r7 y4 c1 Q0 L2 S$ M, X9 [
− PLUGGABLE EQUIPMENT TYPE B; or( L8 c" m& x/ L7 t0 k
− PERMANENTLY CONNECTED EQUIPMENT; or
1 l0 x# m1 c$ q1 ?1 U− equipment that has provision for a permanently connected PROTECTIVE EARTHING/ n5 g9 L: ?) O1 C, A; r
CONDUCTOR and is provided with instructions for the installation of that conductor.( }7 n/ Q6 t+ J- w
NOTE In Finland, Norway and Sweden, the third dashed item is applicable only to equipment as defined in the( \$ a( x, n7 g! I- e
Note to 6.1.2.2.
3 ?) |( x9 N3 D3 G2 V BCompliance is checked by inspection.7 }( G2 I( X% S! x
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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