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|  DSH 548
4 S. T7 m4 ?1 v5 \3 M) g
! {% n" W0 b9 M( u5 O | Application of IEC 60320-1 type appliance inlets& F7 G. c$ K4 G4 X/ y, F6 D
| 1.5.2, 4.5.1- `- j1 A c# A; k2 l) F& q
| 60950(ed.3)
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Standard(s):
: q$ f( d0 o6 w" RIEC 60950:1999
0 E3 H1 X# z6 QSub clause(s):1 {: J) W9 l# C( ]0 o
1.5.2, 4.5.1
* o m/ E G, LDec. NO.0 {/ I/ G% X- _
DSH-5488 s. n: y- u9 E# ] }
Subject:8 N# _& W$ Q) I$ h) L5 Q) O1 r, \
Application of IEC 60320-1 type
# a/ i. L$ i$ C3 U$ X$ \appliance inlets; I6 J! _7 Q8 B7 f7 N0 A9 W
Key words:1 _8 P4 v$ m+ O e7 T
---
" t: K6 W; [& f0 R- N! L fDecision taken at the 41st, E$ ~ n Z/ Q& O
CTL meeting.
9 D5 c. o9 e* W7 Y5 t( Y( w7 GQuestion:$ f( M, T* o* y4 i% L, }
Background:' N, g8 m$ J+ d5 Y) C* O5 ?
An increasing number of Notebook PCs require AC Adaptors to provide output power of up to 150 W9 a/ x7 F" @, s, s9 l) C/ h
at an ambient of up to 40 °C (due Pentium-4 devices). Although designed with a very good efficiency,! L/ M2 H6 w1 K! w
the losses still result in high operating temperatures.
9 d9 U. X' U& B& c. X. J* I# o% oProblem:
* |1 x5 W; p4 r7 K; A3 S( }IEC 60950:99 refers in several subclauses and in Annex P to IEC 60320 series as relevant IEC
& Y* p: S3 s9 t& F( G9 acomponent standard for appliance inlets.
% v% T5 [9 r A9 h& f4 U& ^* l, UHowever, there aren't any specific temperature limits for appliance inlets specified in table 4A parts 1& q0 M, j$ c O& ~* i; @4 M
and 2. W3 m/ ]' i8 U* t9 i* X
This results in a non-uniform interpretation whether:/ }- x; n% d0 G$ w- x
(a) the temperature limit of external surfaces of equipment which can be touched (95 °C Z' C9 T4 G3 o; p+ c/ }! {4 U
for the plastic housing of the appliance inlet)9 `8 g: g# s% L4 v$ V
OR; V1 w- W+ g4 |: k! m$ p8 F
(b) the temperature limit of IEC 60320-1 (70 °C for the pins of the appliance inlet for cold
. m* _% `( A U) K- p' w, Econditions)/ r% u$ m' l4 ]# [
shall be chosen for the assessment of the maximum temperature of the appliance inlet.
' ^0 J1 ^0 }7 w7 K# m* ^ l/ FA clarification for following would be helpful:+ q" b' h3 e T; Q6 i: @7 c& w& |/ |
(i) Is (only) the maximum temperature of the appliance inlet housing to be measured?
4 T W4 X" ]) H& z% n; EOR
& H% P1 \8 Y/ l$ {% h* c9 i) o(ii) Is it necessary to measure besides the temperature of accessible surfaces as well; h9 L; ~$ p; G' Y2 }
the maximum temperature of the pins of an appliance inlet (test location as required
2 M: S/ c! l& e l/ R1 b8 P& naccording to IEC 60320-1)?
2 n1 u/ Z2 x# h0 @6 O/ IDecision:
1 @! J- E( h0 [8 h/ T" sFor testing of a product incorporating IEC 60320-1 type appliance inlets, the temperature limits and! w5 @7 J5 R. g7 K: ~
locations for temperature measurements as described in IEC 60320-1 shall apply:
: `9 E. N5 H' p4 Q! M7 E• 70 °C maximum pin temperature for appliance inlet for cold conditions
$ j& I) |0 B) j4 a4 ?1 {( u+ J8 E. M• Test location: Base of the pin (part of the pin where it protrudes from the engagement face); x" t( v9 v e% Q w' u
The temperature rise shall be determined at the maximum room ambient temperature as declared by
$ I2 d- j0 L E$ s7 O4 Sthe AC Adaptor's manufacturer.1 @" }* m9 [( i v
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发表于 2012-11-6 14:41
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