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|  DSH 548; Q. h' f$ p) ]/ C# x- k
- M8 ?" _8 h$ `/ d* u3 Z | Application of IEC 60320-1 type appliance inlets v w; n2 T! _% ]) t
| 1.5.2, 4.5.1
M, P- T& S8 }6 L3 h | 60950(ed.3)
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Standard(s):4 K7 o# ~4 \; {2 V
IEC 60950:1999
: e9 [ M: o( B, w. T# @Sub clause(s):
! u. g; I4 j) ?# S9 d1.5.2, 4.5.1
: a1 Q) W, c6 f7 gDec. NO.
& k! S+ p1 C' q# LDSH-5481 m+ v! q' C T
Subject:
5 G2 {! n9 R9 |- h+ ?- cApplication of IEC 60320-1 type
* {4 z; d$ q7 s6 Q# pappliance inlets
* n5 l2 n1 V# G+ R9 jKey words:
0 H d# P9 p( K; L8 C---
+ k# ], ~) `$ g! K9 W. v( b# W* |Decision taken at the 41st5 d8 B* W. L7 Q5 \7 _
CTL meeting.' ~' Z3 _* p1 t2 D
Question:
5 _" C e, R6 h( R' \Background:2 e# L/ R) q4 _ O Y
An increasing number of Notebook PCs require AC Adaptors to provide output power of up to 150 W
, i% s; e( `! ]( jat an ambient of up to 40 °C (due Pentium-4 devices). Although designed with a very good efficiency,
$ t' f& }" b# K3 W1 U$ C1 Athe losses still result in high operating temperatures. Y; p4 z3 e) I" C# m/ E6 g
Problem:
8 ~3 x8 s; C+ N; ~( LIEC 60950:99 refers in several subclauses and in Annex P to IEC 60320 series as relevant IEC' l3 {$ M; F8 c# H5 q
component standard for appliance inlets.
9 z- c/ \0 U) a( kHowever, there aren't any specific temperature limits for appliance inlets specified in table 4A parts 17 x; x: {2 M, i' \6 D: t
and 2.
: l# Y& @3 b" S% ?; wThis results in a non-uniform interpretation whether:3 G+ r) ], j: b
(a) the temperature limit of external surfaces of equipment which can be touched (95 °C& N" u2 h: x* k3 c- q
for the plastic housing of the appliance inlet). g. {, L. C0 J
OR* a/ N {* l& m+ n) J2 a
(b) the temperature limit of IEC 60320-1 (70 °C for the pins of the appliance inlet for cold- ]' E* e( y% u( o( ]! b. w
conditions)
5 R8 K% b7 J% T. X" u9 \shall be chosen for the assessment of the maximum temperature of the appliance inlet. E1 U" i; U+ [; s6 h# a
A clarification for following would be helpful:
- E( k& ]) S+ n(i) Is (only) the maximum temperature of the appliance inlet housing to be measured?
4 a- y+ Q% H& k/ e2 mOR
& K' z+ Y, x& C; n$ T# q( s2 b(ii) Is it necessary to measure besides the temperature of accessible surfaces as well
, @/ [( z3 }8 ^$ {) S! ?2 a- [; ^the maximum temperature of the pins of an appliance inlet (test location as required
* g J0 Y' Z' T4 Y1 g" Waccording to IEC 60320-1)?
* g+ p1 y4 r. M0 V' U& L# g% cDecision:
: L9 \! h! h) ~/ ]0 e' X2 zFor testing of a product incorporating IEC 60320-1 type appliance inlets, the temperature limits and
! S7 m' N5 @ X* E; s b& Dlocations for temperature measurements as described in IEC 60320-1 shall apply:
. V6 O+ |* u) Y• 70 °C maximum pin temperature for appliance inlet for cold conditions
0 L" e% K: U& [- @6 ]: \/ w1 N• Test location: Base of the pin (part of the pin where it protrudes from the engagement face)/ \/ @8 |! L* {
The temperature rise shall be determined at the maximum room ambient temperature as declared by
1 E7 K$ g. I7 l2 Z; tthe AC Adaptor's manufacturer.
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发表于 2012-11-6 14:41
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