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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:/ h% A7 ~# Y0 E l9 t+ c6 t
Equipment with such a VDR bridging BASIC INSULATION shall be one of the following:, N6 {5 _$ |2 `9 k3 l# p* Y6 }
− PLUGGABLE EQUIPMENT TYPE B; or
& k/ `3 V& x0 J" X, V$ U- I− PERMANENTLY CONNECTED EQUIPMENT; or
6 T) p% y8 V8 ?, T9 ~& F D− equipment that has provision for a permanently connected PROTECTIVE EARTHING
% W5 D* D X' o" q7 ~% W% ^; sCONDUCTOR and is provided with instructions for the installation of that conductor.
( s! f( I$ w( r1 E' GNOTE In Finland, Norway and Sweden, the third dashed item is applicable only to equipment as defined in the7 J, Z9 F7 {" E4 Y1 B; r
Note to 6.1.2.2.
# v# H& J- P: h# HCompliance is checked by inspection.& V2 v0 B- D" z4 t4 {6 i& e: 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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