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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:
; K$ K/ ]0 G+ {8 l7 QEquipment with such a VDR bridging BASIC INSULATION shall be one of the following:
; J! ^7 A6 e1 u" o- N− PLUGGABLE EQUIPMENT TYPE B; or
4 V8 C7 t. a. r9 U− PERMANENTLY CONNECTED EQUIPMENT; or7 z. w. |# c% k4 m3 z, u
− equipment that has provision for a permanently connected PROTECTIVE EARTHING
6 p" W/ [6 x$ P! c& C+ hCONDUCTOR and is provided with instructions for the installation of that conductor.
( I: ^9 J7 n, a5 m/ b$ s RNOTE In Finland, Norway and Sweden, the third dashed item is applicable only to equipment as defined in the/ X' q: b3 L' b0 _; R, V2 s
Note to 6.1.2.2.' D7 I2 d/ P6 C
Compliance is checked by inspection.. f9 B2 `2 P$ ~2 `) `
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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