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发表于 2008-11-2 14:42
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DESCRIPTION OF ISSUE:
0 H- D! ^8 _, fType of Issue: Technical/Certification: m1 o" [8 S- \8 U
What insulation level may the casing of X1, X2, X3, Y1, Y2, and Y3 capacitors under IEC
) Y" s) k+ \6 N2 ?9 _! t- X- T60384-14, and X1, Y1 and Y2 capacitors under UL 1414 (FOWX2), and capacitors under UL( h! n$ H5 V/ r, ^# k
1283 (FOKY2) be relied upon to act as?
! G% K! q' s! BAPPLICATION GUIDELINE:
4 h/ Q% N# r6 W& XCapacitor casings of Certified X1, X2, X3, Y1, Y2 or Y3 capacitors to IEC 60384-14 may be! H b( Y) N$ _( e/ i" M
accepted as Operational or Basic insulation when the capacitors are used in circuits compatible
- O; i/ t- z0 O5 Zwith their ratings. Therefore, these capacitors do not need to be provided with an additional,6 c& c- v" K |' i9 Q
definable insulation level when the capacitor casing is acting as Basic or Operational insulation.( g0 ?7 B* R8 p* w
(Y1 capacitors may be accepted as Reinforced insulation also.)
: z+ K4 h w; v \+ J& yCapacitor casings of X1, Y1, and Y2 capacitors Recognized to UL 1414 under Across-The-Line! b) e6 ~+ J- d6 o* r. Y+ a
Capacitors, Antenna Coupling and Line-By-Pass Components (FOWX2) may also be accepted Z0 A2 K3 U% T( I
as Operational or Basic insulation when the capacitors are used in circuits compatible with their
9 N1 F' Z/ d( u' 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' \. W: i: ^% ?$ A- T: h
provided between the capacitor casing and another component or an earthed dead metal part. j: J5 j9 {; S4 z. R1 D
(Y1 capacitors may be accepted as Reinforced insulation also.)* W) H& @" h5 I8 f: S
Capacitor casings of capacitors Recognized to UL 1283 under Electromagnetic Interference
. O# X% Q4 K, o6 X3 LFilters (FOKY2) also may be accepted as Operational or Basic Insulation when the capacitors* X, ]& F; Z; ?0 [) ~+ j+ j% X! A6 j
are used in circuits compatible with their ratings. Therefore, these components do not need to# L, X; C; {# t( M6 Z
be provided with an additional, definable insulation level when the capacitor casing is acting as7 S, Y& r- |* J5 [' E" K. m% @9 U
basic or operational insulation.% j) F% O9 w$ U/ T. R) ]
RATIONALE:; C: n1 J8 a C; h
Under IEC 60384-14, X1, X2, X3, Y2, and Y3 capacitors are subjected to a minimum Electric
2 z. V3 w7 A" x# P2 _Strength Test of 2000 V rms between live parts and case. Y1 capacitors are subjected to a 4000
. L- I- `9 g: o8 uV test. (Y4 are only subjected to a 900 V test).
+ `) ?0 J6 |5 D) Y! M7 f3 _For Recognized Component FOWX2 capacitors, UL 1414 now covers X1, Y1 and Y2 capacitors,9 P2 p5 N$ }3 {8 l$ _
and the minimum Electric Strength Test is 2000 V between live parts and case. Y1 capacitors% b( `2 T& [. G: x# A( V- V: C4 b9 _
are subjected to a 4000 V test.
7 y3 o6 E% Z6 W, F6 @* \ V9 MFor Recognized Component FOKY2 capacitors, UL 1283 requires the insulation between live5 @" L- `6 V1 v: ]' Q4 j9 K' y" m5 R
parts and casing is required to pass a 2Vr+1500V (Vrating =< 250V) electric strength test.
; M6 s( B( f2 BAdditionally, the case is required to be V-2 or less flammable (or equivalent), and meet UL 746C
1 [" F' R5 Z' V' B(or generic) insulation requirements.
# `" v- T& {$ } E$ ?OTHER:
! C1 n0 g0 {4 m2 ^0 R: tComments:
4 b6 i7 p( F3 U. UInterpretation Systems:, h+ J- D1 N" ], M9 o" G
• IEC TC 108 Interpretation Sheets: Q24
1 m& V' Y, q0 t, B0 u# h• CENELEC OSM/EE Decisions: 1.5.7.1 (95/9, 97/1), 2.10 (95/8)- K/ E v" K% v. Q; b/ M0 H
RELATED APPLICATION GUIDELINE(S): 1.5.6-2 |
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