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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:5 P8 f1 \6 a" ^& b* ~: I
Equipment with such a VDR bridging BASIC INSULATION shall be one of the following:1 k( ?8 U! ~' A# D% U \4 A
− PLUGGABLE EQUIPMENT TYPE B; or4 F. u8 J. j/ W' C' m
− PERMANENTLY CONNECTED EQUIPMENT; or3 l/ O5 W4 w3 m f8 o, w
− equipment that has provision for a permanently connected PROTECTIVE EARTHING/ D5 [+ {* U8 l% y, `0 t- Q" K
CONDUCTOR and is provided with instructions for the installation of that conductor.' P1 h3 o1 d) f
NOTE In Finland, Norway and Sweden, the third dashed item is applicable only to equipment as defined in the# Q/ h1 Q0 Q% q, l; Q
Note to 6.1.2.2., g* p/ n( w; l5 x6 X: l- v
Compliance is checked by inspection.- F) X) {5 m: ]9 b/ s* A- c
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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