|
|
楼主 |
发表于 2008-11-2 14:42
|
显示全部楼层
DESCRIPTION OF ISSUE:
. E6 s' l" W9 Z' U- N/ PType of Issue: Technical/Certification
7 [ d. J$ M' x9 P- Q4 WWhat insulation level may the casing of X1, X2, X3, Y1, Y2, and Y3 capacitors under IEC
. S. {. F0 ?9 b3 J6 i60384-14, and X1, Y1 and Y2 capacitors under UL 1414 (FOWX2), and capacitors under UL
% }' w; x# L, F c% d) m/ Q1283 (FOKY2) be relied upon to act as?
. D/ O5 ?- a& y: r4 ?APPLICATION GUIDELINE:
; D) W+ J8 K- }& d8 }Capacitor casings of Certified X1, X2, X3, Y1, Y2 or Y3 capacitors to IEC 60384-14 may be% L' `* r2 @; T. j
accepted as Operational or Basic insulation when the capacitors are used in circuits compatible7 C) A; `2 g9 [. D3 L" `% D
with their ratings. Therefore, these capacitors do not need to be provided with an additional,; U @, ]! a. j6 l6 n
definable insulation level when the capacitor casing is acting as Basic or Operational insulation.# |8 a7 ?0 `$ m7 w( x
(Y1 capacitors may be accepted as Reinforced insulation also.)
3 [/ \8 y1 \! Q9 |# E! z3 K! f+ kCapacitor casings of X1, Y1, and Y2 capacitors Recognized to UL 1414 under Across-The-Line& H! D- d3 L. N8 L
Capacitors, Antenna Coupling and Line-By-Pass Components (FOWX2) may also be accepted6 m$ g) q; z: O# G X7 I3 n. p
as Operational or Basic insulation when the capacitors are used in circuits compatible with their" y; N4 O2 G/ D2 t5 j& Z
ratings. Therefore, these components do not need to be provided with an additional, definable insulation level, such as Recognized Component – Tubing, when adequate clearances are not% I4 m1 z* }& |5 {8 H. {
provided between the capacitor casing and another component or an earthed dead metal part.
6 w" J& C9 N4 P4 @) l# M; _(Y1 capacitors may be accepted as Reinforced insulation also.) B. @+ Q. l3 l5 d- a4 J( ^
Capacitor casings of capacitors Recognized to UL 1283 under Electromagnetic Interference
1 Z; B- Z) H' G7 j9 K: e0 xFilters (FOKY2) also may be accepted as Operational or Basic Insulation when the capacitors. a0 N1 `3 i; b0 Y, V5 [
are used in circuits compatible with their ratings. Therefore, these components do not need to
5 ^- b& _8 [ Y: [be provided with an additional, definable insulation level when the capacitor casing is acting as R2 s7 w G# N/ w) S2 N
basic or operational insulation.
( ?: n* K* Z; ^1 D# h, w4 mRATIONALE:/ t1 u E2 R0 A. `
Under IEC 60384-14, X1, X2, X3, Y2, and Y3 capacitors are subjected to a minimum Electric! ]; B7 m4 ~; z, m4 U
Strength Test of 2000 V rms between live parts and case. Y1 capacitors are subjected to a 4000) ]+ e0 p' n- s Q' |
V test. (Y4 are only subjected to a 900 V test).
5 b5 L! i- I& Q6 I$ Q2 MFor Recognized Component FOWX2 capacitors, UL 1414 now covers X1, Y1 and Y2 capacitors,
: g! o/ U$ @% p ^$ ^2 x2 Dand the minimum Electric Strength Test is 2000 V between live parts and case. Y1 capacitors* f- {; g5 |4 y G
are subjected to a 4000 V test.( |! O b" R( \; i% }
For Recognized Component FOKY2 capacitors, UL 1283 requires the insulation between live/ H& {# `; S8 @- V& v
parts and casing is required to pass a 2Vr+1500V (Vrating =< 250V) electric strength test.) L- A# n- p+ _" F+ f, h
Additionally, the case is required to be V-2 or less flammable (or equivalent), and meet UL 746C7 e7 o' a4 p5 K- K% t, A5 H
(or generic) insulation requirements.; p0 ^* ]/ N/ z( W2 s
OTHER:. \1 H$ M2 p ]" h: m- Z8 d$ c
Comments:+ ?! x' K/ N7 F/ M, [& b
Interpretation Systems:
# J' x) |$ F8 w3 ?• IEC TC 108 Interpretation Sheets: Q245 f: |6 I8 |% G, V8 ]
• CENELEC OSM/EE Decisions: 1.5.7.1 (95/9, 97/1), 2.10 (95/8)
" ?9 h0 ~+ {' h/ c- x6 C7 _RELATED APPLICATION GUIDELINE(S): 1.5.6-2 |
|
/1 
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 ) 
窥视卡
雷达卡
发表于 2008-11-2 09:58
显身卡