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DESCRIPTION OF ISSUE:
* a/ i E/ c+ @0 [8 @6 H% |2 xType of Issue: Technical/Certification6 |* X! |( ^4 ~7 v3 R2 D
What insulation level may the casing of X1, X2, X3, Y1, Y2, and Y3 capacitors under IEC
b2 e' B a: ^4 m) r0 C9 {* w; \60384-14, and X1, Y1 and Y2 capacitors under UL 1414 (FOWX2), and capacitors under UL
6 U8 U5 R. J7 k: K1283 (FOKY2) be relied upon to act as?
* {2 v" C9 [& F/ z/ N( C6 rAPPLICATION GUIDELINE:3 I6 [( }4 Z* D+ ^; j
Capacitor casings of Certified X1, X2, X3, Y1, Y2 or Y3 capacitors to IEC 60384-14 may be- D7 D& L7 r* v: _# b; y' k" s
accepted as Operational or Basic insulation when the capacitors are used in circuits compatible
$ ]! F! E7 M! Xwith their ratings. Therefore, these capacitors do not need to be provided with an additional,- X2 ~. S& U/ c0 _- _( Z. A3 H
definable insulation level when the capacitor casing is acting as Basic or Operational insulation., _. q! Y1 u6 \& F% k
(Y1 capacitors may be accepted as Reinforced insulation also.)
: ?+ p8 o9 _/ K6 |; ^Capacitor casings of X1, Y1, and Y2 capacitors Recognized to UL 1414 under Across-The-Line$ `, ?6 o% t! J$ Q+ ~
Capacitors, Antenna Coupling and Line-By-Pass Components (FOWX2) may also be accepted
2 T3 L1 Z3 ~2 j3 A' b R. pas Operational or Basic insulation when the capacitors are used in circuits compatible with their
0 H' v" [! E7 m* d# oratings. 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( h4 j$ y% l, f1 K
provided between the capacitor casing and another component or an earthed dead metal part.; P- O V+ C' V. t+ b
(Y1 capacitors may be accepted as Reinforced insulation also.)
/ w4 F8 q9 }" X: QCapacitor casings of capacitors Recognized to UL 1283 under Electromagnetic Interference6 O1 w4 @+ Y; Z: X% f$ B" {; e! \
Filters (FOKY2) also may be accepted as Operational or Basic Insulation when the capacitors3 j1 ], t8 [: g9 S4 d' D8 n
are used in circuits compatible with their ratings. Therefore, these components do not need to
2 ?6 z6 \; `; Y% hbe provided with an additional, definable insulation level when the capacitor casing is acting as
5 E& |4 `# y, ~$ |& v$ }basic or operational insulation.
3 L$ F( R7 `% V$ r- W9 KRATIONALE:
v1 f' c5 R! P0 Z L+ {- u. C% ]! QUnder IEC 60384-14, X1, X2, X3, Y2, and Y3 capacitors are subjected to a minimum Electric
* A# h6 W) _8 u. P5 {Strength Test of 2000 V rms between live parts and case. Y1 capacitors are subjected to a 4000
4 W+ @' V% t- k* s q1 ]5 g+ DV test. (Y4 are only subjected to a 900 V test).
9 i* {: u3 A0 f# MFor Recognized Component FOWX2 capacitors, UL 1414 now covers X1, Y1 and Y2 capacitors,
$ A, o$ {! F9 d# g% {* Jand the minimum Electric Strength Test is 2000 V between live parts and case. Y1 capacitors k; y, Q. |0 K# o" n
are subjected to a 4000 V test.0 B' l* Y" ]8 h$ {+ X- c
For Recognized Component FOKY2 capacitors, UL 1283 requires the insulation between live
/ G. {- F9 K2 Kparts and casing is required to pass a 2Vr+1500V (Vrating =< 250V) electric strength test.
% u% H& b3 K8 Q* @5 dAdditionally, the case is required to be V-2 or less flammable (or equivalent), and meet UL 746C
! W$ k+ `! _) p* R(or generic) insulation requirements.
: I$ E9 f1 {2 ]5 S- m, _9 BOTHER:6 ^/ w) e$ e8 y# Y8 `- |. N
Comments:& A+ W; H, b+ k* o( I
Interpretation Systems:
$ |- c! P( j0 w2 i/ w* p% P9 d( y5 @• IEC TC 108 Interpretation Sheets: Q246 H$ m# h- _( x. F, ?5 p3 Z8 _9 r
• CENELEC OSM/EE Decisions: 1.5.7.1 (95/9, 97/1), 2.10 (95/8)
. i+ j, k. X4 M/ wRELATED APPLICATION GUIDELINE(S): 1.5.6-2 |
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