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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:1 V$ d C4 B+ D, [3 h2 r! l9 ^6 L5 R
Equipment with such a VDR bridging BASIC INSULATION shall be one of the following:
6 ?/ F3 o8 V+ u# T( i− PLUGGABLE EQUIPMENT TYPE B; or5 \( [( H) }8 n/ z. k4 U5 O
− PERMANENTLY CONNECTED EQUIPMENT; or
; [2 f# E$ K: P− equipment that has provision for a permanently connected PROTECTIVE EARTHING, `$ N3 k( u6 |: [' |
CONDUCTOR and is provided with instructions for the installation of that conductor.
0 e. G5 Z4 P7 O# E, n, h: }" s! C1 cNOTE In Finland, Norway and Sweden, the third dashed item is applicable only to equipment as defined in the2 c3 o6 w) w1 Q' [
Note to 6.1.2.2.
8 ^4 x- {& P7 k% I! X& yCompliance is checked by inspection.
- k# k& @% } f# L6 K7 p* m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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