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|  DSH 548, W. N2 j% y% S/ f7 w/ b3 a) ^
4 t r* V+ I, H3 y* I# @
| Application of IEC 60320-1 type appliance inlets
- w7 x; ]9 i2 c" R" d | 1.5.2, 4.5.14 Z* B) e& x' f6 k; H H& s
| 60950(ed.3)7 V" Y6 v: X0 N! B# j# ~2 h
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2 ~; q/ _+ ]& V3 V$ C! F. }Standard(s):) E( `9 N4 ?1 L d6 h: I. N
IEC 60950:1999) B6 P" Z; e; H6 I
Sub clause(s):9 ^, }+ @4 z( G2 U4 Z9 Q
1.5.2, 4.5.1* x$ ~" W9 v p' W% ^
Dec. NO.' i4 N+ ?1 _% o" z5 Q
DSH-548
1 C% f9 P% R! O5 H6 N- G; ~! {: @Subject:
: V" g% H# P# v/ j( L8 z: ?Application of IEC 60320-1 type
0 C- V: ~5 _' Vappliance inlets
3 K. r7 Z' e5 k$ BKey words:' d& e/ z% B% R! Z* W6 }
---4 G" p6 D% G" b; F+ f, V
Decision taken at the 41st, n! L! N' O. q0 {5 P$ e. R) V
CTL meeting.$ u& `" d$ G; H1 k+ m5 ]
Question:3 H2 l3 }" F; y' n8 a* `
Background:$ R7 M8 L1 v( c& _
An increasing number of Notebook PCs require AC Adaptors to provide output power of up to 150 W! K. c0 A4 w; Z# @
at an ambient of up to 40 °C (due Pentium-4 devices). Although designed with a very good efficiency,
4 U X2 F% A! X* |+ ]9 `1 u1 _/ |the losses still result in high operating temperatures./ Z3 w1 G; e9 ~' F2 [
Problem:: S6 N& N. m; V9 W4 L& Y7 v
IEC 60950:99 refers in several subclauses and in Annex P to IEC 60320 series as relevant IEC
, f6 y; T2 i+ Rcomponent standard for appliance inlets.
" i+ v; i0 Q& |7 F+ V$ nHowever, there aren't any specific temperature limits for appliance inlets specified in table 4A parts 1
7 D: i; t# i5 j. H/ oand 2./ ]! n$ E% {1 D8 W1 n
This results in a non-uniform interpretation whether:; t: w/ R5 }9 t/ L5 `
(a) the temperature limit of external surfaces of equipment which can be touched (95 °C. ?+ Y( p; b9 c, F7 x. M/ z' Z
for the plastic housing of the appliance inlet)
+ W G1 m% @8 ~9 D! Z& c: R6 Z$ JOR) O- O( O9 a$ V* A) N5 A6 M
(b) the temperature limit of IEC 60320-1 (70 °C for the pins of the appliance inlet for cold
) Y7 G3 x5 g( [/ }# }; mconditions)
0 Z8 Z; ?" r* Q% C+ J& Qshall be chosen for the assessment of the maximum temperature of the appliance inlet.3 B9 Q6 z$ k8 R+ u
A clarification for following would be helpful:5 k8 p# P/ c" O$ Y6 W
(i) Is (only) the maximum temperature of the appliance inlet housing to be measured?4 U, L; \3 H7 y* k1 R* u
OR E' I: J H- P* D: q+ Z
(ii) Is it necessary to measure besides the temperature of accessible surfaces as well
3 R9 L; b; A8 e% u8 Z u: T; u4 Pthe maximum temperature of the pins of an appliance inlet (test location as required
L( e" D' h% B+ X4 F8 p; F7 {+ kaccording to IEC 60320-1)?
3 Q! `+ Q5 C$ T: W) QDecision:
" W# W# w+ c0 c* N6 j7 N2 YFor testing of a product incorporating IEC 60320-1 type appliance inlets, the temperature limits and
' b6 }( E6 m5 @) O) i( S, L* l9 clocations for temperature measurements as described in IEC 60320-1 shall apply:
/ M! ?; v T2 V' x* O* p m• 70 °C maximum pin temperature for appliance inlet for cold conditions
6 H6 m6 n7 ?/ X+ r• Test location: Base of the pin (part of the pin where it protrudes from the engagement face)( \7 F: F# n* B" O1 c& Y3 q! x
The temperature rise shall be determined at the maximum room ambient temperature as declared by2 T' Z& \% r. [! j( D8 N
the AC Adaptor's manufacturer.
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