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标题: UL/CUL漏电流测试疑点 [打印本页]

作者: 秋飘风叶    时间: 2008-6-2 15:20
标题: UL/CUL漏电流测试疑点
近期做一个UL/CUL 65案子的时候,一类设备,测试U2有390mV,开始认为FAIL了,但是UL工程师看了下标准后说CLASS I对此有放松,可以放过,但我看了下UL 60065标准的确有提到只要测MIU值就行了,但是CUL用的是IEC的标准,里面没提到不用测U2也没有看到对CLASS I有放松条款啊?迷惑中,请各位帮忙解释一下,谢谢.
作者: wuybpujr    时间: 2008-6-2 22:08
看CAN/CSA22.2 No。60065的9.1.1.1下面的叙述:2 X- c& a' b/ C, i' R5 @! J! W  _* c5 r
For CLASS I constructions the r.m.s. TOUCH-CURRENT to earth shall not be more than 3,5 mA.
1 @4 h5 m# g& n/ Q7 U2 v. u0 X5 y; OThe measurement shall be carried out with the measurement network described in annex D of
! J9 c  N! v' {  S3 Jthis standard and with the protective earthing connection disconnected.
作者: 秋飘风叶    时间: 2008-6-3 09:53
引用第1楼wuybpujr于2008-06-02 22:08发表的  :: J4 Q/ x1 m5 C& g+ z  s) A
看CAN/CSA22.2 No。60065的9.1.1.1下面的叙述:
: F# e8 ~$ U1 iFor CLASS I constructions the r.m.s. TOUCH-CURRENT to earth shall not be more than 3,5 mA.
( W% H$ X: k/ x2 j. I/ ZThe measurement shall be carried out with the measurement network described in annex D of
8 ]3 u' N$ H8 n' c  E& |1 _this standard and with the protective earthing connection disconnected.

: y# T6 W& ]- Q5 |: Q+ e7 P+ ~# c# }5 m对啊,是有这样的描述,但是在这之上的U1/U2的说明中并没有说CLASS I可以不用测的啊或是说测出的值可以大些啊
作者: wuybpujr    时间: 2008-6-3 21:28
IEC标准,对1类它是3.5MA,对2类它是0.7MA,已经大了很多了!
作者: moneye    时间: 2008-6-3 22:41
引用第3楼wuybpujr于2008-06-03 21:28发表的  :. o9 N# s6 l: m# F
IEC标准,对1类它是3.5MA,对2类它是0.7MA,已经大了很多了!
* U, ~  x6 C& J2 q

/ Y9 b. d# D& w; eIEC标准里对1类产品 3.5mA泄漏电流是有明确针对性的9 O. A' {. J. @; W

5 ^; j3 T  ]  W, w7 y4 e2类是0.7mA???兄台是不是打错数字了?
& o2 Y) a3 i% N9 A# z  K. _: |
+ D# |2 e8 G. z, T0 Y. \. X9 I3 b4 l附上IEC 60335原文:: P' A3 l4 C2 c8 u8 v3 i$ s
1 {, S, N8 M; d: K7 {5 E2 L
After the appliance has been operated for a duration as specified in 11.7, the leakage current
( L  Q" B) A: c! K2 ~& F  ]) jshall not exceed the following values:
3 p: t5 {2 q0 E% w/ i– for class II appliances 0,25 mA+ s6 E" o) e* |' d
– for class 0, class 0I and class III appliances 0,5 mA& s+ F5 x1 ]9 ]  C8 X( y/ l) l
– for portable class I appliances 0,75 mA3 m: ?& t+ Z' [8 Z* b0 A% F9 R) x  f
– for stationary class I motor-operated appliances 3,5 mA
7 Z" P. ]+ n% ]5 P$ U– for stationary class I heating appliances 0,75 mA or 0,75 mA per kW rated power input of the appliance with a maximum of 5 mA, whichever is higher
作者: 秋飘风叶    时间: 2008-6-4 11:59
我的主要疑问是,对CLASS I ,UL/CUL里面有哪里提到可以只测漏电流,不用测U2的?还是U2对CLASS I有其他放宽要求?   
作者: wuybpujr    时间: 2008-6-4 21:14
我谈的是音视频产品,不是家电产品,你到底问的是啥产品?如果是家电产品,咋要看UL60065?
作者: 秋飘风叶    时间: 2008-7-2 14:58
当然是65啦,65才要测U1/U2的嘛,要是95就不用测啦
9 ?$ r3 O" g: V  L0 I还是不明白
作者: alisonyxx    时间: 2010-4-19 17:04
学习中.......
作者: Andy.Yang    时间: 2010-4-19 17:25
Studied...., I'm also a little confused that sometimes UL needs to test the leakage current, but others, there is no specified leakage current...




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