|
|
楼主 |
发表于 2008-11-2 14:42
|
显示全部楼层
DESCRIPTION OF ISSUE:- @5 S3 u' O8 u1 z/ o
Type of Issue: Technical/Certification# Z! z8 h: X+ y% ]
What insulation level may the casing of X1, X2, X3, Y1, Y2, and Y3 capacitors under IEC* f9 @+ y6 K! E1 P0 Q# [3 t# u! W
60384-14, and X1, Y1 and Y2 capacitors under UL 1414 (FOWX2), and capacitors under UL& n5 C+ b. x: e. j; t. m6 @& t
1283 (FOKY2) be relied upon to act as?
: y8 \" H1 Q" ~: h E5 `APPLICATION GUIDELINE:
( [4 [9 l. U! b+ u7 O9 xCapacitor casings of Certified X1, X2, X3, Y1, Y2 or Y3 capacitors to IEC 60384-14 may be
/ I. U3 b2 @$ O* t3 O2 Faccepted as Operational or Basic insulation when the capacitors are used in circuits compatible9 z0 G/ x% E/ y; Y8 h4 Z
with their ratings. Therefore, these capacitors do not need to be provided with an additional,# b7 Y/ a/ s7 g! d2 o' M( J
definable insulation level when the capacitor casing is acting as Basic or Operational insulation.( Z: E4 C' E" z# P; r
(Y1 capacitors may be accepted as Reinforced insulation also.)) ^2 Y+ H" @8 A" {' J$ X" o
Capacitor casings of X1, Y1, and Y2 capacitors Recognized to UL 1414 under Across-The-Line
n( p2 C; j" t0 z( x% UCapacitors, Antenna Coupling and Line-By-Pass Components (FOWX2) may also be accepted
( A7 Z1 G" B1 B& a. L Pas Operational or Basic insulation when the capacitors are used in circuits compatible with their- e; r1 S( S' Z; N9 t: {
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
6 `) l6 c5 @) ~provided between the capacitor casing and another component or an earthed dead metal part.9 r6 A8 ?; N9 W7 T% X/ _
(Y1 capacitors may be accepted as Reinforced insulation also.)/ L+ F6 G7 R2 l% G& M
Capacitor casings of capacitors Recognized to UL 1283 under Electromagnetic Interference
, R$ ?. |/ i( }# A" p: gFilters (FOKY2) also may be accepted as Operational or Basic Insulation when the capacitors, J- {1 O8 L+ t0 C* w% R- ]9 ~
are used in circuits compatible with their ratings. Therefore, these components do not need to3 v! J: M2 V* [3 e
be provided with an additional, definable insulation level when the capacitor casing is acting as
+ U3 h# `3 m; N2 X" I; M9 ebasic or operational insulation.
8 M5 Z7 m( g9 ] }3 a. T. u' ]/ L# YRATIONALE:" j/ R u" v/ n
Under IEC 60384-14, X1, X2, X3, Y2, and Y3 capacitors are subjected to a minimum Electric8 g2 }8 E, y. V$ N n, h
Strength Test of 2000 V rms between live parts and case. Y1 capacitors are subjected to a 40009 h, U! r! _2 k: o+ Y6 a+ m
V test. (Y4 are only subjected to a 900 V test).
! W+ ], d0 I* S5 [9 P8 g0 ?For Recognized Component FOWX2 capacitors, UL 1414 now covers X1, Y1 and Y2 capacitors,3 j1 z2 }& h* u" l; \- L; B. b
and the minimum Electric Strength Test is 2000 V between live parts and case. Y1 capacitors
5 A. k' E8 Y8 {7 S2 K8 j# hare subjected to a 4000 V test.4 j7 C7 L' x0 Q. [
For Recognized Component FOKY2 capacitors, UL 1283 requires the insulation between live
3 W! H) s8 D- C7 ~6 @! S( Yparts and casing is required to pass a 2Vr+1500V (Vrating =< 250V) electric strength test.
2 I( n; a% P5 h9 b; ~Additionally, the case is required to be V-2 or less flammable (or equivalent), and meet UL 746C
! L$ i8 o( b" f4 v. r(or generic) insulation requirements.3 W* o) D ~% i b, e$ w, H9 `4 i) g
OTHER:
7 D w0 {- h4 `+ XComments:# x. `, q$ R; {7 S! z) u
Interpretation Systems:/ h1 K% V9 k7 _% Y; A* J$ h
• IEC TC 108 Interpretation Sheets: Q247 z3 S: t& R" `( _4 a, \
• CENELEC OSM/EE Decisions: 1.5.7.1 (95/9, 97/1), 2.10 (95/8)
) D3 ~6 z: ~6 S( URELATED 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