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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:+ P& {+ n& A; U( y0 H8 \4 E
Equipment with such a VDR bridging BASIC INSULATION shall be one of the following:* |& O6 [- L( E o
− PLUGGABLE EQUIPMENT TYPE B; or6 d7 w% ^- F* q
− PERMANENTLY CONNECTED EQUIPMENT; or
/ G! n2 ?& E8 p* n0 Y8 C2 k. G− equipment that has provision for a permanently connected PROTECTIVE EARTHING* y. J, y3 ?2 F% l3 ] D
CONDUCTOR and is provided with instructions for the installation of that conductor.2 }( P+ W2 y7 J4 F/ @3 z' p ?
NOTE In Finland, Norway and Sweden, the third dashed item is applicable only to equipment as defined in the& K0 P3 l$ U3 P
Note to 6.1.2.2.
+ [( F9 R0 o+ @5 c. |2 iCompliance is checked by inspection.9 e5 y+ [7 m: s! h3 F9 Q+ h
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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