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| DSH 548
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| Application of IEC 60320-1 type appliance inlets! x: q7 f8 R& u( m3 | e
| 1.5.2, 4.5.10 V* F4 E: y6 e( X0 ?# j
| 60950(ed.3)% S! l+ c: ]0 h) }2 X" l
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Standard(s):& |: r% m) Y. |* p
IEC 60950:1999: _0 o5 u f+ \9 ~' O
Sub clause(s):/ Y: F3 c0 d: e: Z v( t
1.5.2, 4.5.1
6 J$ ]$ m) K1 w" pDec. NO.
3 y, @- r9 M% X' n& |- C) {" R" }DSH-548) q( |5 G. r. N0 X
Subject:
* @- {0 V- j% |/ f. DApplication of IEC 60320-1 type8 x6 \/ }% W7 O+ R" j3 b
appliance inlets
1 ?$ K1 x2 F; v3 V ?' ]9 J6 f; D$ dKey words:: a" ^ U) v2 m. e" O9 |
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Decision taken at the 41st
" ]/ Q, y; C( ?/ c3 W0 ~+ qCTL meeting.) e( O" d; W. f
Question:' I( c) w, {8 ^1 k) m7 O( T
Background:
1 f3 I' d. e4 a6 k1 X- U. r/ H/ lAn increasing number of Notebook PCs require AC Adaptors to provide output power of up to 150 W
/ R4 a1 _3 C7 V" H7 cat an ambient of up to 40 °C (due Pentium-4 devices). Although designed with a very good efficiency,3 E1 \9 ]; h+ Q
the losses still result in high operating temperatures.
4 x' x6 O! D! Q* n# m- Z( yProblem:- J; O- h; V M/ Y4 p9 p. q# G- ` ^* ~
IEC 60950:99 refers in several subclauses and in Annex P to IEC 60320 series as relevant IEC# z+ D+ N7 i' q- O7 G7 f4 ?6 _+ X
component standard for appliance inlets.
7 b. B* l/ H Z" u, VHowever, there aren't any specific temperature limits for appliance inlets specified in table 4A parts 1: d/ f: R1 t) S6 F0 G
and 2.% @" N4 A3 j6 {2 P8 w- B' G
This results in a non-uniform interpretation whether:0 R3 a0 ~! m3 R5 o
(a) the temperature limit of external surfaces of equipment which can be touched (95 °C( d f6 p, N& M# q
for the plastic housing of the appliance inlet)
! \# h, K M( n' N0 m( YOR
- Y% D* P; z1 @(b) the temperature limit of IEC 60320-1 (70 °C for the pins of the appliance inlet for cold( E/ X( [6 d! Z+ z! o
conditions)
+ e; s' ~% [. g0 Y. ~shall be chosen for the assessment of the maximum temperature of the appliance inlet.
6 o3 C* @+ M& w+ {0 tA clarification for following would be helpful:, A8 ]+ b; B- ^+ L! E
(i) Is (only) the maximum temperature of the appliance inlet housing to be measured?
, o: j, {( Y/ h9 v U KOR
}, Y7 U. O* b8 O3 S; s- a$ @! ~# \(ii) Is it necessary to measure besides the temperature of accessible surfaces as well. P% l( A4 r3 o7 o- ^* V1 z% S( a3 A
the maximum temperature of the pins of an appliance inlet (test location as required2 d: F: s( p2 e- Y
according to IEC 60320-1)?$ P5 y! A2 t# k5 ]5 K
Decision:3 P7 @$ t, s* [7 F! t$ |' F* B
For testing of a product incorporating IEC 60320-1 type appliance inlets, the temperature limits and
7 U& Z/ O' E1 w/ X; d) _4 rlocations for temperature measurements as described in IEC 60320-1 shall apply:
; A3 U) Y9 R# Q$ K: l• 70 °C maximum pin temperature for appliance inlet for cold conditions
) ~1 N* l' q+ z& e• Test location: Base of the pin (part of the pin where it protrudes from the engagement face)
8 f5 p) I" h+ u' FThe temperature rise shall be determined at the maximum room ambient temperature as declared by
( L" y0 v. L! b+ R4 l! ?the AC Adaptor's manufacturer., S5 R) U$ D6 X$ i4 ?$ G+ Q y
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