|
| DSH 548! A5 _1 L3 R8 T8 ?6 S% A$ f
: M! D5 g7 n2 G# S( @# S n
| Application of IEC 60320-1 type appliance inlets
- d+ G4 B5 R3 G! j+ G | 1.5.2, 4.5.1* x% F9 \+ W( C6 T. j' s
| 60950(ed.3)
/ t* l- M- v, }. d |
3 d% ]& _! `. z" SStandard(s):
& Z, R' T$ w. ?/ W3 `IEC 60950:1999$ j* z1 O8 w4 N2 P6 S+ {
Sub clause(s):
. B$ z5 w+ J: m3 q: M1.5.2, 4.5.1
2 G0 c1 L& z9 D# FDec. NO.: N- y' R3 Q6 T/ ?' z" [
DSH-5489 G5 \4 E* m( q/ A. X7 v. s) L# J* \
Subject:! E% h. O9 I9 W. A6 G' g3 W4 {
Application of IEC 60320-1 type: f4 i0 k% _) ]' A e0 u9 P: O
appliance inlets
8 c/ j, D7 i9 i/ m7 o+ zKey words:
" c! T2 i0 f5 G1 A- Y---
/ g+ G5 [: i+ L: [1 y1 B( wDecision taken at the 41st' X, E9 c8 i* F% F
CTL meeting. Z# |7 i M6 y* y
Question:! w* E0 j; C# A# H
Background:/ _# X. n; n$ n" _
An increasing number of Notebook PCs require AC Adaptors to provide output power of up to 150 W* c! [3 j; P- T% n( d% O, ~; F
at an ambient of up to 40 °C (due Pentium-4 devices). Although designed with a very good efficiency,! X/ G# }& d" w3 T) p' T+ S. v
the losses still result in high operating temperatures.
0 B$ |2 J4 P# z* rProblem:
# X4 M' ~( S; a, o2 ~IEC 60950:99 refers in several subclauses and in Annex P to IEC 60320 series as relevant IEC
! u$ Y1 @/ L } K6 {9 c1 acomponent standard for appliance inlets.
+ d% ]" A, q( _0 U0 Z, I: F- J% S; zHowever, there aren't any specific temperature limits for appliance inlets specified in table 4A parts 10 P! a- E7 \# ?7 U6 c9 J
and 2.
) [1 g! G5 x( f4 u- SThis results in a non-uniform interpretation whether:! j( x- @2 Y( _4 {
(a) the temperature limit of external surfaces of equipment which can be touched (95 °C: D- @' E3 }, M" _5 J
for the plastic housing of the appliance inlet)' P7 D |/ Q* L
OR3 N! A7 e, F! x5 n# Q
(b) the temperature limit of IEC 60320-1 (70 °C for the pins of the appliance inlet for cold
3 C% K6 q. u! U& cconditions)
, Q* ?: n/ b; m! k ^, h* d9 dshall be chosen for the assessment of the maximum temperature of the appliance inlet.
# R( j' I7 I. D7 ]6 zA clarification for following would be helpful:- o' B' K3 I7 k, K6 y
(i) Is (only) the maximum temperature of the appliance inlet housing to be measured?7 r$ c5 k" ~8 ?- `# E
OR- v* `- w5 M2 \" y
(ii) Is it necessary to measure besides the temperature of accessible surfaces as well! M s1 R1 f) g9 o
the maximum temperature of the pins of an appliance inlet (test location as required) ]$ w, x" p7 n$ `6 J
according to IEC 60320-1)?6 k6 Z! q/ X# c" e# N
Decision:
% |: ?8 W4 S. o$ u( R' IFor testing of a product incorporating IEC 60320-1 type appliance inlets, the temperature limits and5 c6 W: ~3 P' S( h* F
locations for temperature measurements as described in IEC 60320-1 shall apply:: c# f$ F, c3 H: L5 X0 B
• 70 °C maximum pin temperature for appliance inlet for cold conditions
A/ O( f) ]3 A/ X/ h7 m9 E• Test location: Base of the pin (part of the pin where it protrudes from the engagement face)
+ s a- X1 j0 d6 dThe temperature rise shall be determined at the maximum room ambient temperature as declared by
7 k9 l2 X( H7 u/ E7 m0 tthe AC Adaptor's manufacturer.
1 }' ?: ^% C* G* d
3 I3 }& B0 S! E
$ B) v' c8 ?. O# B- d: I* T: F, { |
本帖子中包含更多资源
您需要 登录 才可以下载或查看,没有帐号?注册安规
x
|