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标题: 永久性安裝設備的漏電流問題 [打印本页]

作者: barry    时间: 2007-5-19 16:39
标题: 永久性安裝設備的漏電流問題
映像中,UL 60950-1中,固定安装的(permanently  installation),是不需限制测漏电流,只需要加一個警告語句即可。6 c% c( l0 K% Q3 m+ \3 X

5 r6 ^: n0 i* Z5 i+ E. c* B9 g- L5 x" J誰能幫找找條文出處。(最好能貼出來)8 y" w. H2 C  G' S# |% w& J
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我的UL 60950-1打不開,很郁悶。。。
作者: lynn305    时间: 2007-5-21 14:12
BARRY:! @  t# h! M# L5 m$ `% e
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见下文, 还是有限制的,只是限制的方法不同,条例是我在IEC60950中找的,回头我也找UL60950看看是不是一样的.! o5 |% c# @% Y; _& [6 o8 m
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5.1.7 Equipment with touch current exceeding 3,5 mA
5 X4 z$ r3 w( w7 _9 e4 \For STATIONARY PERMANENTLY CONNECTED EQUIPMENT or STATIONARY PLUGGABLE EQUIPMENT' M9 s$ ~* d- V3 j- U" B3 r: C7 ^
TYPE B having a main protective earthing terminal, if the TOUCH CURRENT measurements
# X' V; [  X8 W# G, Aexceed 3,5 mA r.m.s., all of the following conditions apply:8 A: N6 L' H$ a( m6 h& r
– the r.m.s. PROTECTIVE CONDUCTOR CURRENT shall not exceed 5 % of the input current per  G- `0 R) V5 @- o# F
line under normal operating conditions. If the load is unbalanced, the largest of the three2 K: z6 ]! W  a& O. Z  ?$ T
line currents shall be used for this calculation. To measure the PROTECTIVE CONDUCTOR. S5 w, q7 T7 y+ b. `
CURRENT, the procedure for measuring TOUCH CURRENT is used but the measuring
* m! U$ `0 R& C  a3 oinstrument is replaced by an ammeter of negligible impedance; and
, i) D5 D6 @/ L# h; w– the cross-sectional area of the PROTECTIVE BONDING CONDUCTOR shall be not be less than3 x1 n7 \/ ~2 B9 f
that of the conductors in table 3B (see 3.2.5), with a minimum of 1,0 mm2 in the path of
6 C: J% i0 v  [: h, T& |high PROTECTIVE CONDUCTOR CURRENT; and3 H' a$ z3 @. e  }1 S7 V
– one of the following labels, or a label with similar wording, shall be affixed adjacent to4 b/ j3 g: N7 @9 {) r
the equipment AC MAINS SUPPLY connection:
. h! a' I3 m2 m0 H2 {' \. h- \+ P4 nWARNING4 N' S7 O5 }; f2 @# o
HIGH LEAKAGE CURRENT) Z: X; @4 p( B7 k( `- H1 Q; J* v
EARTH CONNECTION ESSENTIAL
% `5 e3 I  X0 zBEFORE CONNECTING SUPPLY
  `9 H, a, I2 z) I7 d& ]! V6 hWARNING6 B& M+ T( Y0 }7 ^
HIGH TOUCH CURRENT
- q: e4 b' n* N* I! H& k% SEARTH CONNECTION ESSENTIAL
! |3 F" {: l. }+ z, F# bBEFORE CONNECTING SUPPLY
作者: barry    时间: 2007-5-21 14:17
引用第1楼lynn305于2007-05-21 14:12发表的  :& x4 ~/ c% t# ]
BARRY:& e1 Y, W' L$ B- d1 f

2 w% t' _, u+ o" m" B8 v见下文, 还是有限制的,只是限制的方法不同,条例是我在IEC60950中找的,回头我也找UL60950看看是不是一样的.0 ~7 m, Q! c) @

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. ?( J4 R. T" B6 S; P9 ]6 I.......

2 ~+ w# Z* T; F4 f: S2 z: H* a唉,記憶還是不可靠呀。。。5 P1 x" D5 a  P) e3 _

; k3 X% k8 J5 e# J謝謝lynn305的幫忙。。。8 z8 {; u- Q9 i
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[s:2]
作者: lynn305    时间: 2007-5-21 14:19
5.1.7要和TABLE 5A结合起来看的, STATIONARY EQUIPMENT的接触电流限制是3.5A.
作者: lynn305    时间: 2007-5-21 14:29
引用第0楼barry于2007-05-19 16:39发表的 永久性安裝設備的漏電流問題 :' F( e* Q" q% O2 t, n
映像中,UL 60960-1中,固定安装的(permanently  installation),是不需限制测漏电流,只需要加一個警告語句即可。5 w; P, {& |; o% h& E, j$ Q; h
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誰能幫找找條文出處。(最好能貼出來)
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6 R, s+ q$ z! K; `6 A我的UL 60950-1打不開,很郁悶。。。

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9 v) q, s8 U  W4 n/ E7 }找了个UL60950看了看, 说法和IEC60950的一样, 发上来你自己看看.
作者: barry    时间: 2007-5-21 14:49
引用第3楼lynn305于2007-05-21 14:19发表的  :
; t  x$ j9 {5 d: M# F- j: M5.1.7要和TABLE 5A结合起来看的, STATIONARY EQUIPMENT的接触电流限制是3.5A.

4 N1 G2 ~/ a  Q0 o3 |9 V更正一下:
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滿足5.1.7要求的STATIONARY EQUIPMENT為“輸入電流”的5%.) ~3 o5 y) t2 y* A3 m
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不滿足5.1.7要求的STATIONARY EQUIPMENT為3.5mA

作者: tony0421    时间: 2007-5-21 17:47
以前的一个印象,MS永无超过5%的可能。由测试方法决定的。
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# E0 B4 l( W0 o' ^) h随便说说,没仔细算过。




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