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|  DSH 548
( \! B/ R1 d* M Y0 u# E, ]' C$ M7 N- H- S7 `; W. t
| Application of IEC 60320-1 type appliance inlets% S: X" z5 n6 G' I/ j% y
| 1.5.2, 4.5.1
1 X1 \( b; A! w1 ] | 60950(ed.3)8 k& R9 p4 D0 r6 `' i! t8 p6 \
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6 V2 W8 i8 J* Q- I8 n r+ dStandard(s):
7 `/ ~8 r9 z" n, T7 CIEC 60950:1999
) g9 \9 D6 G9 |8 USub clause(s):
5 i4 b" _) h; j6 p1.5.2, 4.5.1
. y# T$ w2 ]) w `4 f; A+ j6 fDec. NO.: S+ y0 E) x: j+ t7 p
DSH-548# |2 T* I/ g; |5 L& b* [9 z( N+ o
Subject:8 c; J. o7 v2 s" x$ e8 L
Application of IEC 60320-1 type& E5 n# p# ~* Q9 I G/ u* @$ V. f
appliance inlets
* Z/ E1 P9 P; K2 OKey words:8 c0 _ x. H0 d, q {7 O$ Q
---- a6 V* Z3 Y/ H5 F( P) {& J
Decision taken at the 41st+ N; i5 L1 h+ C) V1 F
CTL meeting.. F. f8 p& } j1 ]8 a' T: [9 J
Question:7 z$ M; f- B" D0 \) f" z3 l
Background:
6 s D/ w! t( Y/ PAn increasing number of Notebook PCs require AC Adaptors to provide output power of up to 150 W
9 `/ R1 S+ ~( m1 oat an ambient of up to 40 °C (due Pentium-4 devices). Although designed with a very good efficiency,
% I4 x" H' F' h# T" _the losses still result in high operating temperatures.
/ }- ]1 z. S% c$ PProblem:8 E- ^! e$ ]- V7 [9 E8 L, p$ e
IEC 60950:99 refers in several subclauses and in Annex P to IEC 60320 series as relevant IEC
5 g" ^# l* ]- w# @( A7 V8 jcomponent standard for appliance inlets.8 l0 b8 w' [$ m7 [- _+ {* K
However, there aren't any specific temperature limits for appliance inlets specified in table 4A parts 1
. g3 w& G4 [2 v, }' @5 Zand 2.4 ?6 M3 S8 u' t& a! G* Y5 y
This results in a non-uniform interpretation whether:
3 c0 i6 E' p: R* |6 Q0 q/ G(a) the temperature limit of external surfaces of equipment which can be touched (95 °C9 `1 S" Y1 ^+ R! ]2 G
for the plastic housing of the appliance inlet)
: h0 R5 |9 o) W1 W) v) COR# @, Y- g! A1 J9 J
(b) the temperature limit of IEC 60320-1 (70 °C for the pins of the appliance inlet for cold4 O0 H2 ~+ D- u: g- q
conditions)
9 U+ C7 ^3 u A U8 _/ G* ?shall be chosen for the assessment of the maximum temperature of the appliance inlet.
2 B: E: q4 Z) \& E: XA clarification for following would be helpful:% {8 P+ d' x4 _
(i) Is (only) the maximum temperature of the appliance inlet housing to be measured?
# ? K9 W0 W8 T* g! QOR7 o4 ~. H$ R1 b8 v8 G: y
(ii) Is it necessary to measure besides the temperature of accessible surfaces as well
* a9 E9 H4 l: u- ~2 i( K- X! dthe maximum temperature of the pins of an appliance inlet (test location as required
6 U4 Q. F0 W/ H3 e) paccording to IEC 60320-1)?. l7 E0 k. V' y1 \8 _+ Q
Decision:
# m2 L2 P& O6 y% V/ iFor testing of a product incorporating IEC 60320-1 type appliance inlets, the temperature limits and
. b) X; }6 R/ ~2 h& a% t9 `locations for temperature measurements as described in IEC 60320-1 shall apply:
; p5 F! o6 f- ?3 E• 70 °C maximum pin temperature for appliance inlet for cold conditions
+ u$ ^1 l" |* M& t1 D$ ^• Test location: Base of the pin (part of the pin where it protrudes from the engagement face)( U0 Y) Y: t# S% D" P
The temperature rise shall be determined at the maximum room ambient temperature as declared by7 O- H" `9 r" ]# p: c# @
the AC Adaptor's manufacturer., ^" w1 t1 O; g) ]
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发表于 2012-11-6 14:41
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