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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% j" i U) [* U9 I" AEquipment with such a VDR bridging BASIC INSULATION shall be one of the following:
& |, m6 C* y4 N6 s− PLUGGABLE EQUIPMENT TYPE B; or
5 \4 x( W/ o* y0 w9 K− PERMANENTLY CONNECTED EQUIPMENT; or
8 ]( e/ o0 l- P; W7 O− equipment that has provision for a permanently connected PROTECTIVE EARTHING9 E4 T; b. x6 d2 x; x
CONDUCTOR and is provided with instructions for the installation of that conductor.
& H" h; H# m6 ^9 e8 c6 D2 VNOTE In Finland, Norway and Sweden, the third dashed item is applicable only to equipment as defined in the) v- F: I5 U, f; s6 `8 g0 S
Note to 6.1.2.2.
& a. g" B" a; C) V9 A+ u; r8 j& ACompliance is checked by inspection.
! z# U0 _! n( p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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