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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：) J# z) C, t; K
Equipment with such a VDR bridging BASIC INSULATION shall be one of the following:
8 F8 A0 l* ?% I1 T% h− PLUGGABLE EQUIPMENT TYPE B; or) `0 O6 ~) Q9 m+ E% S( F: }" A# u4 e
− PERMANENTLY CONNECTED EQUIPMENT; or$ M( f' @( f* T0 M
− equipment that has provision for a permanently connected PROTECTIVE EARTHING
2 _' e; E. M3 w4 h6 _/ XCONDUCTOR and is provided with instructions for the installation of that conductor.
+ G6 \) t4 ~' u: M9 ?: d% DNOTE In Finland, Norway and Sweden, the third dashed item is applicable only to equipment as defined in the0 ~& }3 ^& S. l8 ?. {
Note to 6.1.2.2.' l1 H3 i+ C7 ~1 S2 X. L
Compliance is checked by inspection.
# O2 y7 j+ q, t+ v4 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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