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发表于 2008-11-2 14:42
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DESCRIPTION OF ISSUE:+ R- N! ^9 Q- G4 a: Y9 m1 n
Type of Issue: Technical/Certification
, k7 ^" {3 u2 b: m6 Y2 n9 k( |( vWhat insulation level may the casing of X1, X2, X3, Y1, Y2, and Y3 capacitors under IEC
1 f! z0 S! r4 n R& L4 q60384-14, and X1, Y1 and Y2 capacitors under UL 1414 (FOWX2), and capacitors under UL/ j; Q$ G7 |, E' k+ m# j
1283 (FOKY2) be relied upon to act as?
: ?) [5 j1 l' P2 ]) Q" {* XAPPLICATION GUIDELINE:3 ?! C0 b, Z1 h1 v- r M4 p, e5 `* x3 Q
Capacitor casings of Certified X1, X2, X3, Y1, Y2 or Y3 capacitors to IEC 60384-14 may be& l, g& J+ q3 B1 N- @, ?
accepted as Operational or Basic insulation when the capacitors are used in circuits compatible" i% L8 k+ Z4 U u3 p! X
with their ratings. Therefore, these capacitors do not need to be provided with an additional,. X/ w/ v8 P6 ?4 U* i* R5 p, F
definable insulation level when the capacitor casing is acting as Basic or Operational insulation.
" k. t. Y/ K2 R' m(Y1 capacitors may be accepted as Reinforced insulation also.)
$ g4 S& S, Y. r( oCapacitor casings of X1, Y1, and Y2 capacitors Recognized to UL 1414 under Across-The-Line
2 Q) R! |+ X! t3 v2 `Capacitors, Antenna Coupling and Line-By-Pass Components (FOWX2) may also be accepted
9 Y+ @/ w5 v4 m$ g& \6 s4 ?as Operational or Basic insulation when the capacitors are used in circuits compatible with their
6 D$ [9 U+ l6 A) c, r" Dratings. 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
+ c' E3 x3 J; V# Jprovided between the capacitor casing and another component or an earthed dead metal part.
; Y) l& t# d1 W6 v5 C( z(Y1 capacitors may be accepted as Reinforced insulation also.)
! T5 J9 m- {1 P7 H1 \Capacitor casings of capacitors Recognized to UL 1283 under Electromagnetic Interference
5 J+ X; Z, t5 y( k# w7 i" e4 L% iFilters (FOKY2) also may be accepted as Operational or Basic Insulation when the capacitors
+ n4 ]6 u( k9 \are used in circuits compatible with their ratings. Therefore, these components do not need to/ y5 `, X: P$ c% W0 ~" k% T% \
be provided with an additional, definable insulation level when the capacitor casing is acting as
1 b! p9 b- m2 c% b8 G9 p3 f8 ubasic or operational insulation.
7 q0 Y. N* M' T1 l8 i0 zRATIONALE:9 B; a; I6 k6 ]' S) w; m
Under IEC 60384-14, X1, X2, X3, Y2, and Y3 capacitors are subjected to a minimum Electric
7 [. e+ }9 }* K, @Strength Test of 2000 V rms between live parts and case. Y1 capacitors are subjected to a 4000
9 b& K6 T( U2 U6 MV test. (Y4 are only subjected to a 900 V test)." S; P& x4 B0 c2 n6 `) a9 O1 J
For Recognized Component FOWX2 capacitors, UL 1414 now covers X1, Y1 and Y2 capacitors,1 G% n& x4 D& i% a( k
and the minimum Electric Strength Test is 2000 V between live parts and case. Y1 capacitors
' @6 S# T( l: p1 a2 A; q( V9 lare subjected to a 4000 V test." k4 L+ j( a2 R3 D
For Recognized Component FOKY2 capacitors, UL 1283 requires the insulation between live7 Y/ `' u+ `. q4 D
parts and casing is required to pass a 2Vr+1500V (Vrating =< 250V) electric strength test.) [, k. w! f# k" j9 _$ s
Additionally, the case is required to be V-2 or less flammable (or equivalent), and meet UL 746C' B+ O; i: O9 Y; }1 \# D/ g7 Y
(or generic) insulation requirements.- x% j0 A* J; x8 N: U
OTHER:
/ P, a( `. O& u7 YComments:* m9 H5 M3 F3 }8 H h! B2 w
Interpretation Systems:
; K2 D5 T$ b5 [3 J% \ E• IEC TC 108 Interpretation Sheets: Q24$ [5 R( h, H8 Q9 x1 ]5 l
• CENELEC OSM/EE Decisions: 1.5.7.1 (95/9, 97/1), 2.10 (95/8)2 s0 X8 m$ q b- K6 M2 }
RELATED APPLICATION GUIDELINE(S): 1.5.6-2 |
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