标题: 關于battery charger申請UL 60950-1問題 [打印本页] 作者: prince 时间: 2008-4-11 21:08 标题: 關于battery charger申請UL 60950-1問題 現有一款battery charger在申請UL 60950-1時, UL說根據Practical Application Guidelines for+ ~% T* i9 i" g5 J* D8 Y; h
Information Technology Equipment –Safety – Part-1: General RequirementsPAG 60950-1, First Edition, 如下: 7 N/ c& H0 A: V% N" [+ t3 O5 L& B9 n, Z# q( G8 A
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4.3.8-3 Performance requirements for battery chargers with battery packs3 b1 x, \5 ~4 `9 J# M# _4 c9 |
STANDARD IEC/UL 60950-1 : E' e7 ]7 V' o7 x( \. W2 `0 oAPPLICABILITY UL(C-UL) and IEC4 J6 ^* B5 l4 W4 s
(Sub)CLAUSE/ANNEX NUMBER: 4.3.8 i5 r3 Z" U. n! m% H- [: f; L, u(Sub)CLAUSE/ANNEX HEADING: Batteries1 n! D" {, a' @. K' B
OTHER RELEVANT (Sub)CLAUSES/ANNEXES (as4 w$ n5 d1 O+ m6 ^! U) ?
Applicable): $ F' C& l8 B: @. ?1.7.2, 4.5, 5.3; h6 G; P @8 U) I! a8 U
DESCRIPTION OF ISSUE: 7 `. {& [3 S. v& I% Y& fType of Issue: Technical/Certification 5 P7 X0 e+ u2 q! iWhat are the construction and performance requirements for battery chargers (with battery1 ?% A P: q3 ? g
packs) when the battery charger is evaluated under the Standard as part of either an end% d" q/ d/ N# p0 A& i) y7 I$ B
product investigation or part of an Accessory Listing investigation? & c" S; _, [ J6 t: `APPLICATION GUIDELINE:) w4 a! X! ]' S6 }' e& j; Z/ b
The following are general construction and performance guidelines.- e( w3 Y* K% I( t8 n7 G% [7 i& o/ Y
Construction: The following considerations should be given to battery chargers (and packs) " \6 [! p0 \. G4 jduring the construction evaluation. v/ j H& ~, |; b! Na. A marking should be provided on the battery charger indicating the specific model * l- F" C7 t; pof ITE for which the battery charger is to be used;- l) b3 A# M# y6 W9 d: ^
b. The charger should be marked to indicate the battery pack (mfg./type/rating) for- A& u2 f6 Z3 J5 E v3 E
which the battery charger is to be used; . u' y; p. c, h% z) X8 L* ac. The battery charger and battery pack constructions should be controlled in the UL * p* b8 F) U3 r7 YFollow-up Procedure. : O$ p1 G$ G+ L) g( v7 X v2 D5 APerformance: The following considerations should be given to the performance test program + B4 }$ ~! T- ?established for battery chargers: 5 e& X4 e2 ~$ k" k186 PAG 60950-1 OCTOBER 1, 2004 3 `2 S- B* ?2 q9 \0 h% Oa. For external stand-alone battery chargers that have the capability of supplying ITE; u4 ]9 h* D: b' w/ N8 O$ p: z
with power, a Heating Test (sub-clause 4.5) should be conducted with the battery 7 [3 m7 ]: }' u7 u' ]charger supplying the ITE load. Discharged battery packs should be replaced with fully# i* q0 M9 I7 A- g9 I8 c
charged battery packs until thermal equilibrium is achieved; 7 x3 P# L9 ]! }6 @# d+ j: W# A/ Ab. For all battery charger circuits, a Heating Test (sub-clause 4.5) should be o& a; Y3 m8 @6 y
conducted with the battery charger charging battery packs that have been fully 5 q& {5 Y7 @9 [. B: N2 N% r, X; fdischarged; x& Q9 ^% w+ V+ uc. If the battery charging circuit is supplied by a transformer, a Transformer Overload# n/ }( `" m' U
(C1) Test should be conducted on the transformer that supplies the charging circuit. : k+ X5 L2 q9 _! x! hd. An Abnormal Operation Test program (per Sub-clauses 4.3.8 and 5.3.6) should be $ o2 @: ]& Y4 v" [* f! Adesigned anticipating possible foreseeable fault conditions, including a short circuit of ; j5 l: b" n& F) x" N9 [the battery charger output (if user accessible) and reverse polarity testing of the & s9 v0 d, {; V- X7 C% ?charger input (if the battery charger input connector is not polarized). # R5 I( h4 K% O7 Z2 |( J! BRATIONALE: 6 E9 h5 K! m t) O$ y ^' m vBattery chargers evaluated under this Standard introduce some unique considerations into8 o. D3 [0 F& R0 c
equipment evaluations. Battery chargers are typically designed for specific size (power) battery/ C% A/ Z3 n+ P, z6 P
packs and use of battery packs other than that specified by the manufacturer could create a. v+ f7 G- D7 p' R! Q: ~2 p
hazard. Therefore, it is prudent to require correlation marking between charger unit and battery2 u: m; h) @$ m! i% q
pack. + t4 @- R, |7 c% s& ~/ hBattery charger circuits typically are supplied power by a transformer. During the charging cycle," e0 U8 M& d! P/ y4 J1 d; {- X
the transformer may be subjected to a different set of thermal conditions than experienced, A k. ~5 C. o% s0 F6 y/ \
during other normal load testing, and it is more likely that a transformer supplying the charger 3 \3 z5 _) Q; u3 | Dcircuit will be subjected to an overload condition. Therefore, requiring a transformer overload$ N2 k' P' o1 S2 D' S! L
test.7 d, J0 X$ c v" O8 x! |
OTHER: " l5 c! n. r+ K+ i9 WComments:. h* h8 I$ D' q
Interpretation Systems: NONE5 e* L& v6 Z& U8 F
