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发表于 2008-11-2 14:42
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DESCRIPTION OF ISSUE:$ c, J# V1 k2 ?" b( B9 V, V7 d( k
Type of Issue: Technical/Certification
4 A0 i5 O& q, ?+ l i* H" c6 UWhat insulation level may the casing of X1, X2, X3, Y1, Y2, and Y3 capacitors under IEC+ x% `: W1 H2 l" Z! D. e) z
60384-14, and X1, Y1 and Y2 capacitors under UL 1414 (FOWX2), and capacitors under UL* p R8 K4 [ f7 `8 T! M
1283 (FOKY2) be relied upon to act as?
* ^, R$ j1 \$ O* G$ e/ _9 U ?" kAPPLICATION GUIDELINE:
, F: Z& y% k1 k, ?' @' CCapacitor casings of Certified X1, X2, X3, Y1, Y2 or Y3 capacitors to IEC 60384-14 may be, h& _2 X5 O3 E. u5 X
accepted as Operational or Basic insulation when the capacitors are used in circuits compatible; b7 I: z4 c6 ]6 P, H- { [
with their ratings. Therefore, these capacitors do not need to be provided with an additional,7 J0 w- K" n0 O
definable insulation level when the capacitor casing is acting as Basic or Operational insulation., f( z" \/ y. ^, C4 ~$ Y# s7 }) `
(Y1 capacitors may be accepted as Reinforced insulation also.)
* z3 o; T# A+ D8 @1 kCapacitor casings of X1, Y1, and Y2 capacitors Recognized to UL 1414 under Across-The-Line n& n/ C3 k2 {8 N; R6 u
Capacitors, Antenna Coupling and Line-By-Pass Components (FOWX2) may also be accepted1 |: r4 I$ t1 X. H, t: |# a% p
as Operational or Basic insulation when the capacitors are used in circuits compatible with their
5 {" M& `! ]( L# m5 Cratings. 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; g! f- ?' S, g; o1 x
provided between the capacitor casing and another component or an earthed dead metal part.
% {6 Z1 D, I u& ~3 b: {8 z( J }(Y1 capacitors may be accepted as Reinforced insulation also.). q$ Q$ M2 _& {1 R) F
Capacitor casings of capacitors Recognized to UL 1283 under Electromagnetic Interference+ Y! f! h# D9 P% X# j
Filters (FOKY2) also may be accepted as Operational or Basic Insulation when the capacitors
, k& r; ~9 A/ z" K9 b. k) mare used in circuits compatible with their ratings. Therefore, these components do not need to" H1 L) H; k9 B; F+ t9 o
be provided with an additional, definable insulation level when the capacitor casing is acting as1 l$ y2 f0 S: z6 O
basic or operational insulation.
9 s! U4 _) X3 t& [RATIONALE:4 k s, q' u( [, I
Under IEC 60384-14, X1, X2, X3, Y2, and Y3 capacitors are subjected to a minimum Electric l' G3 h$ f& ]6 G
Strength Test of 2000 V rms between live parts and case. Y1 capacitors are subjected to a 4000! U# B% z4 |) B" ?
V test. (Y4 are only subjected to a 900 V test).% j1 R( w# D' e7 J0 B
For Recognized Component FOWX2 capacitors, UL 1414 now covers X1, Y1 and Y2 capacitors,
& \. G8 J7 O% Mand the minimum Electric Strength Test is 2000 V between live parts and case. Y1 capacitors& Q9 S# M1 R! d6 b( Z0 Q3 e
are subjected to a 4000 V test.
* d+ t% J# [- D/ VFor Recognized Component FOKY2 capacitors, UL 1283 requires the insulation between live* P" } t& O- L8 H' E) d
parts and casing is required to pass a 2Vr+1500V (Vrating =< 250V) electric strength test.2 u& F' U$ _8 ?4 T9 x! H; W# N+ v$ Y
Additionally, the case is required to be V-2 or less flammable (or equivalent), and meet UL 746C
& x- _" m3 `: Q% ^# Z(or generic) insulation requirements.( A8 ]( ^5 g9 j+ h3 E& \: m$ ^) b
OTHER:: a; {; u+ _! k& A9 A4 ^
Comments:: \- l. y9 U0 m
Interpretation Systems:# ^" n# v8 N4 E. E$ x5 ] t
• IEC TC 108 Interpretation Sheets: Q24
' t" u: }6 z1 ?9 {4 l• CENELEC OSM/EE Decisions: 1.5.7.1 (95/9, 97/1), 2.10 (95/8)4 v3 n1 E* s& T: Q. o s- `. J
RELATED APPLICATION GUIDELINE(S): 1.5.6-2 |
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