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发表于 2008-11-2 14:42
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DESCRIPTION OF ISSUE:
! O3 o# B1 v) ]; w) l3 A7 [# x. _Type of Issue: Technical/Certification
1 D4 G/ ~' x3 }' D& _ {# o4 p4 _; XWhat insulation level may the casing of X1, X2, X3, Y1, Y2, and Y3 capacitors under IEC
* G. B# a9 d" D60384-14, and X1, Y1 and Y2 capacitors under UL 1414 (FOWX2), and capacitors under UL
. `4 e$ Y4 ]! ]1283 (FOKY2) be relied upon to act as?! Z! L! @: v, N; T* e. W
APPLICATION GUIDELINE:
- Z" j1 D+ y& n% OCapacitor casings of Certified X1, X2, X3, Y1, Y2 or Y3 capacitors to IEC 60384-14 may be
3 m. T% S8 I* kaccepted as Operational or Basic insulation when the capacitors are used in circuits compatible" d9 ^! i4 M. P: f' c2 y
with their ratings. Therefore, these capacitors do not need to be provided with an additional,
$ S. |5 g5 J6 n2 p) L- v1 P, adefinable insulation level when the capacitor casing is acting as Basic or Operational insulation.
& O! K0 S0 I# I. _3 Z(Y1 capacitors may be accepted as Reinforced insulation also.)8 y8 d7 R5 M6 Q0 Q
Capacitor casings of X1, Y1, and Y2 capacitors Recognized to UL 1414 under Across-The-Line$ ^% o. j0 t1 h7 R% a. S0 j
Capacitors, Antenna Coupling and Line-By-Pass Components (FOWX2) may also be accepted
2 [$ K& G" Z' e" k3 H$ t; v% J* yas Operational or Basic insulation when the capacitors are used in circuits compatible with their$ d& x" z% Y+ |% O! p
ratings. 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
0 z- W! O2 A" Z, a! iprovided between the capacitor casing and another component or an earthed dead metal part./ A- r2 y" U% n
(Y1 capacitors may be accepted as Reinforced insulation also.)
! e2 @- ]' x$ B1 w$ E' E) \5 fCapacitor casings of capacitors Recognized to UL 1283 under Electromagnetic Interference
. V$ {, P& Q( [Filters (FOKY2) also may be accepted as Operational or Basic Insulation when the capacitors$ f- u! G$ p X; p' G
are used in circuits compatible with their ratings. Therefore, these components do not need to
4 k4 O) f* F2 N' }* x! F, wbe provided with an additional, definable insulation level when the capacitor casing is acting as
: h6 l* k$ s( a9 ibasic or operational insulation.
6 u6 q* w' A4 Y8 VRATIONALE:0 C& [+ G, g# q+ }- p r8 C7 i
Under IEC 60384-14, X1, X2, X3, Y2, and Y3 capacitors are subjected to a minimum Electric2 }; ^/ x7 F+ X# M+ X3 n4 y5 U0 T( E
Strength Test of 2000 V rms between live parts and case. Y1 capacitors are subjected to a 4000
& r8 D: l' Q0 w; E" mV test. (Y4 are only subjected to a 900 V test).0 \* H2 K" m; [; N, T( C% k
For Recognized Component FOWX2 capacitors, UL 1414 now covers X1, Y1 and Y2 capacitors,9 }& }# b9 c/ t! o2 ?. }
and the minimum Electric Strength Test is 2000 V between live parts and case. Y1 capacitors' F3 s$ ^' @% I" q- ~* o$ L) P
are subjected to a 4000 V test.
& x/ g$ W% _- ^7 DFor Recognized Component FOKY2 capacitors, UL 1283 requires the insulation between live
: j$ v, T/ ?( k, o2 ~# D( oparts and casing is required to pass a 2Vr+1500V (Vrating =< 250V) electric strength test.1 Q& G2 S7 i& P4 L
Additionally, the case is required to be V-2 or less flammable (or equivalent), and meet UL 746C) }6 {0 D }( w* W- ?! q0 G
(or generic) insulation requirements.- g( I0 Q3 r$ ]
OTHER:" G8 ~$ \- p" S) `- e+ n
Comments:+ u! C2 F7 v: h, K1 B& ^
Interpretation Systems:
+ D4 [2 D$ r7 G: ?/ I. V• IEC TC 108 Interpretation Sheets: Q24
6 N3 |' E+ k l% e3 u" \2 p7 d8 z• CENELEC OSM/EE Decisions: 1.5.7.1 (95/9, 97/1), 2.10 (95/8)
0 d1 i; m- f! c" T! I6 O! PRELATED APPLICATION GUIDELINE(S): 1.5.6-2 |
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