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|  DSH 5485 B& m3 I" w0 p s
1 J7 `- o8 T9 f1 e& L3 p: i' _ | Application of IEC 60320-1 type appliance inlets3 f# n( u4 n: t" J0 o& ]
| 1.5.2, 4.5.1
9 k- a( R$ [ k+ j& h | 60950(ed.3)
4 R% G3 h1 S8 q |
# v9 t9 Y5 _7 |- J1 h
Standard(s):
! ]3 Y6 v9 B' \7 [+ gIEC 60950:1999; V% X! W; A( [% { S6 ?9 M
Sub clause(s):8 u: }6 A5 d. d" r, T
1.5.2, 4.5.1
6 c S0 I+ w4 ODec. NO.9 E+ T* b, P4 b7 `. e; W
DSH-548
6 [# ~$ W" b' N9 c* L2 YSubject:
) u4 s# x& n2 `! z8 V& K/ i( q- gApplication of IEC 60320-1 type z+ C# H7 }- n8 Q
appliance inlets
; O# y) T( B6 e* IKey words:/ I, p' l+ V" _8 ^
---
# O+ A' L9 W, z2 R+ E# i8 uDecision taken at the 41st( d3 _% A( X$ s z) U5 |1 o0 d( _
CTL meeting.) B- r# Q- o9 l% b5 l5 b" Q* w+ K
Question:* v, V7 `( l, |) ?
Background:# I [2 }5 s' Y; H
An increasing number of Notebook PCs require AC Adaptors to provide output power of up to 150 W" x' f6 O% b/ j
at an ambient of up to 40 °C (due Pentium-4 devices). Although designed with a very good efficiency,
% Q; ?% n/ F9 Y1 e- y1 ithe losses still result in high operating temperatures.
9 T# ?4 {" t+ K5 fProblem:% U6 Y- G* g6 P* ?: P
IEC 60950:99 refers in several subclauses and in Annex P to IEC 60320 series as relevant IEC* ?4 C( {5 m& H! n1 u2 {$ n
component standard for appliance inlets.
. u1 X4 S$ K. lHowever, there aren't any specific temperature limits for appliance inlets specified in table 4A parts 1
1 M- d$ T% |+ \ V0 z2 Kand 2.7 R/ i" \8 f4 b
This results in a non-uniform interpretation whether:
" a3 r: B. E8 w* p7 U) M9 M(a) the temperature limit of external surfaces of equipment which can be touched (95 °C/ E" v1 h! `$ v6 g, ?' S
for the plastic housing of the appliance inlet)0 L2 m# ^5 }6 n d! N9 v6 \
OR
2 l4 |* |$ s% ?& V" f; G(b) the temperature limit of IEC 60320-1 (70 °C for the pins of the appliance inlet for cold
7 V. j3 ?# L+ J; n3 fconditions)
. ^1 P, j2 ~$ q4 p5 ~- I5 ishall be chosen for the assessment of the maximum temperature of the appliance inlet.& h5 J' G5 o9 d1 w
A clarification for following would be helpful:8 o" k6 z* c$ [1 z! N O
(i) Is (only) the maximum temperature of the appliance inlet housing to be measured?3 s d, T8 W* j) _
OR
% S% P# O$ p8 R8 I(ii) Is it necessary to measure besides the temperature of accessible surfaces as well
! K6 z+ `0 {5 K, j, Zthe maximum temperature of the pins of an appliance inlet (test location as required H$ x' w& Y4 T
according to IEC 60320-1)? k$ E7 L% S# ^! [( ?
Decision:; [" l7 `/ z2 `5 e
For testing of a product incorporating IEC 60320-1 type appliance inlets, the temperature limits and" |7 \' ~1 {& E5 k6 C6 j) [" W/ X# ?
locations for temperature measurements as described in IEC 60320-1 shall apply:
1 @+ E# O3 m& F• 70 °C maximum pin temperature for appliance inlet for cold conditions
( f* v; E9 _1 p, V; ?+ M n• Test location: Base of the pin (part of the pin where it protrudes from the engagement face)
! g0 Q6 e) f3 w& V& L; Y) ?$ OThe temperature rise shall be determined at the maximum room ambient temperature as declared by! X. ^9 U7 \& O! ]
the AC Adaptor's manufacturer., |$ z6 A f/ X0 Z
, T2 i% d( c$ Y1 u# i$ v" e2 _4 @3 u% s. w4 I: P/ o d/ L6 M) C
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发表于 2012-11-6 14:41
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