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|  DSH 548
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| Application of IEC 60320-1 type appliance inlets8 s# D' { Y) G) n( w. F
| 1.5.2, 4.5.1
; {' {7 m9 C/ H: }* m | 60950(ed.3)
9 P. m0 q, R6 i |
& V& `) B/ l$ Z. s# D% f$ fStandard(s):6 I% x9 _ \3 R' V/ ^2 |* Z
IEC 60950:1999
; f1 A: F$ G# A* QSub clause(s):* }6 N8 `0 f" e3 t8 U. {. H8 h. ]) d
1.5.2, 4.5.1" F' V( f( k$ X7 |& T8 |
Dec. NO.
, q4 }! ]. T* E/ fDSH-548
4 k; ?. G% T& S- {( d' [+ O, uSubject:
, y2 Q5 j/ k" t5 c4 lApplication of IEC 60320-1 type
9 Z# v' m) `% Iappliance inlets( a0 E$ \9 o; _7 E# S( A
Key words:
, `8 q- S- E7 Q: A7 X---
- ~8 A0 T s5 c, M7 B6 `Decision taken at the 41st* ^+ q5 L' v! ]1 L7 G
CTL meeting.3 w7 Z8 r: {% |
Question:
9 _. Z! G7 ?: z6 ~$ j O( Q8 DBackground:
! T5 X5 V% X3 J! d: s- G: F# }8 p0 u5 BAn increasing number of Notebook PCs require AC Adaptors to provide output power of up to 150 W: c" d2 L% k' \
at an ambient of up to 40 °C (due Pentium-4 devices). Although designed with a very good efficiency,( i S+ E+ S5 Y& S, k
the losses still result in high operating temperatures.
$ Q" p% ~( z0 dProblem:
$ P5 }6 I/ J% E) Y- V$ L* T# `IEC 60950:99 refers in several subclauses and in Annex P to IEC 60320 series as relevant IEC+ A2 w% q0 v, y) ?) w' F
component standard for appliance inlets., \8 S2 h$ S$ g% a% a+ x$ ~$ {
However, there aren't any specific temperature limits for appliance inlets specified in table 4A parts 1
) |# }5 ]5 g9 I' Z8 uand 2.( L0 w, o' M% q! |
This results in a non-uniform interpretation whether:
# b4 r9 G8 W2 s(a) the temperature limit of external surfaces of equipment which can be touched (95 °C9 e0 z0 k" G0 K% o1 L3 Y
for the plastic housing of the appliance inlet)
6 z0 P3 q8 j2 M9 WOR: o1 ]# z* s2 V0 ^! Y4 |1 ^
(b) the temperature limit of IEC 60320-1 (70 °C for the pins of the appliance inlet for cold
3 V# r" K/ X8 s) ?conditions): z6 ?2 h* N+ C. w0 ^* l$ J
shall be chosen for the assessment of the maximum temperature of the appliance inlet.; L- b. ]/ t4 U$ E* j
A clarification for following would be helpful:
+ {2 V; B! g, J$ T3 }(i) Is (only) the maximum temperature of the appliance inlet housing to be measured?6 O x3 @4 J( ?; s% \$ u% o" u
OR g I- F: B3 j6 _' d- Y. d7 V
(ii) Is it necessary to measure besides the temperature of accessible surfaces as well( I2 H7 ] m2 x: B: D
the maximum temperature of the pins of an appliance inlet (test location as required
/ ?& `$ o. b5 [! |) _according to IEC 60320-1)?% Z# K5 ?- p1 J; M! j
Decision:
, M, c) t- s, X' s+ W3 r/ tFor testing of a product incorporating IEC 60320-1 type appliance inlets, the temperature limits and+ F+ T0 c& m! e
locations for temperature measurements as described in IEC 60320-1 shall apply: m) @! \2 k0 r. A4 y" ]
• 70 °C maximum pin temperature for appliance inlet for cold conditions5 }) c! r. h$ r% h
• Test location: Base of the pin (part of the pin where it protrudes from the engagement face)
2 ^. H d$ e) x/ i* }+ X1 v, f7 BThe temperature rise shall be determined at the maximum room ambient temperature as declared by# j3 [& i4 x! M- P0 s
the AC Adaptor's manufacturer.
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