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发表于 2008-11-2 14:42
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DESCRIPTION OF ISSUE:2 H8 v' L- ?( r4 c4 P/ G- S I E, Q
Type of Issue: Technical/Certification
" A/ I$ }9 a' {) F: C3 y( wWhat insulation level may the casing of X1, X2, X3, Y1, Y2, and Y3 capacitors under IEC) V) f0 b0 H5 {! P$ k/ e* z9 ^
60384-14, and X1, Y1 and Y2 capacitors under UL 1414 (FOWX2), and capacitors under UL
_* ~9 ~; L# d! a+ K& I& J1283 (FOKY2) be relied upon to act as?1 z9 W6 R% t# D5 `: ` ]% H# y8 {! t
APPLICATION GUIDELINE:+ ?8 w2 _2 N. v" @
Capacitor casings of Certified X1, X2, X3, Y1, Y2 or Y3 capacitors to IEC 60384-14 may be
1 W# H9 y! C& v# m$ x: ]7 ~# haccepted as Operational or Basic insulation when the capacitors are used in circuits compatible; z4 ]- V2 ?4 U, ~
with their ratings. Therefore, these capacitors do not need to be provided with an additional,; e& S# }3 K& A* V0 g% t% C( z
definable insulation level when the capacitor casing is acting as Basic or Operational insulation.
0 |2 \( ^+ s8 W" [6 L5 n( d' A1 z(Y1 capacitors may be accepted as Reinforced insulation also.)
0 P9 ~9 K0 A7 sCapacitor casings of X1, Y1, and Y2 capacitors Recognized to UL 1414 under Across-The-Line; F: c8 b/ N. E; e, ~( b- {
Capacitors, Antenna Coupling and Line-By-Pass Components (FOWX2) may also be accepted
6 |/ X9 S/ l/ das Operational or Basic insulation when the capacitors are used in circuits compatible with their
5 Y1 ?3 b8 I1 V" W% fratings. Therefore, these components do not need to be provided with an additional, definable insulation level, such as Recognized Component – Tubing, when adequate clearances are not4 l0 \6 S# c7 q9 r0 L
provided between the capacitor casing and another component or an earthed dead metal part.9 G# b( D( I: Z
(Y1 capacitors may be accepted as Reinforced insulation also.)
1 z- D. I% I4 I4 |; ]Capacitor casings of capacitors Recognized to UL 1283 under Electromagnetic Interference7 S$ I1 O) M; P- P7 O
Filters (FOKY2) also may be accepted as Operational or Basic Insulation when the capacitors
/ X# ^. I* G& g9 {are used in circuits compatible with their ratings. Therefore, these components do not need to0 D. h1 d+ I4 }/ G; W {
be provided with an additional, definable insulation level when the capacitor casing is acting as
4 a: v* x" p( N, g8 ^basic or operational insulation./ g1 p8 ]7 ^, W- ?
RATIONALE:; p* V4 T6 \7 X+ @; r
Under IEC 60384-14, X1, X2, X3, Y2, and Y3 capacitors are subjected to a minimum Electric
6 e- ^& d: A! V. rStrength Test of 2000 V rms between live parts and case. Y1 capacitors are subjected to a 4000' j* ?" O% n; e) Z$ s- p
V test. (Y4 are only subjected to a 900 V test).
* N F: Q0 N, S J8 j% g: @For Recognized Component FOWX2 capacitors, UL 1414 now covers X1, Y1 and Y2 capacitors,+ p0 U) q/ o2 D, X6 Q) B/ ?
and the minimum Electric Strength Test is 2000 V between live parts and case. Y1 capacitors3 |* \8 \9 g# B! W3 @3 [8 g
are subjected to a 4000 V test.2 _. w( I' w3 W2 ~
For Recognized Component FOKY2 capacitors, UL 1283 requires the insulation between live
X; @( V5 J+ T9 \& _parts and casing is required to pass a 2Vr+1500V (Vrating =< 250V) electric strength test.
9 Y9 D) m3 h( CAdditionally, the case is required to be V-2 or less flammable (or equivalent), and meet UL 746C* i) V/ Q: M0 Q! m, G+ o0 d
(or generic) insulation requirements.& q/ L; {" T# w2 N+ f
OTHER:
* `0 h! V6 Z: T7 d3 z* w2 U/ j7 jComments:1 F( H& U* u$ C. |, v
Interpretation Systems:
% b8 g: i( Z/ R8 H• IEC TC 108 Interpretation Sheets: Q241 ?+ i% M d7 Z& d6 B! z9 C
• CENELEC OSM/EE Decisions: 1.5.7.1 (95/9, 97/1), 2.10 (95/8)/ B: Q+ G7 \2 ~2 \+ a5 W9 O+ K
RELATED APPLICATION GUIDELINE(S): 1.5.6-2 |
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