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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:, ]4 l% v, i: b$ a T) i
Equipment with such a VDR bridging BASIC INSULATION shall be one of the following:
6 P2 Q9 ?) c2 k7 |$ s+ n: ]0 E− PLUGGABLE EQUIPMENT TYPE B; or
9 ?8 O: V+ _* V3 z− PERMANENTLY CONNECTED EQUIPMENT; or
7 l- o0 R1 B% U1 ]% a; D− equipment that has provision for a permanently connected PROTECTIVE EARTHING
. \2 ?0 m, t5 k8 `1 w- H6 l3 F# ^4 F8 w) ZCONDUCTOR and is provided with instructions for the installation of that conductor.
, B! l0 u2 t0 ~7 z4 e0 H6 ZNOTE In Finland, Norway and Sweden, the third dashed item is applicable only to equipment as defined in the! R9 j. `. x( D( C# I- Z
Note to 6.1.2.2.% E m6 r) j4 v8 H! _
Compliance is checked by inspection.# A) D c* Z% A; z5 j
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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