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|  DSH 548
8 |) x; f m/ u- X# D9 f7 x3 T0 M) _3 f# M+ _
| Application of IEC 60320-1 type appliance inlets
6 v- n/ h$ {; m | 1.5.2, 4.5.1) Q" t5 v$ g- C
| 60950(ed.3)1 h" `) U" h5 D8 z& l
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2 B5 J3 Y6 Y% k) z5 ^5 O- P% S. DStandard(s):
( a/ g, {1 E( P/ kIEC 60950:1999 F6 I8 m, k7 J7 ^
Sub clause(s):5 z' V o# u. j: V
1.5.2, 4.5.1
% s; C* y7 w1 `, I* H8 n6 n) uDec. NO.
( K, b% i+ a, m* b7 n6 aDSH-548
& g2 t% d8 X! f! \$ v( MSubject:
4 n5 P, q- |/ o& O8 YApplication of IEC 60320-1 type( U2 ^9 L. r" P, }0 t: W; y+ t
appliance inlets' N6 l. [& y- y8 w8 o2 u* Y! M7 W
Key words:
3 n9 {+ h; ~# n- a8 L---. I4 D% A3 Z! K. X/ {7 g
Decision taken at the 41st& q; N2 N2 |, @0 ]7 Y# U
CTL meeting./ D$ R' ?# n5 r$ W! ]/ v& ~
Question:; h `7 A0 D+ H+ F7 ?1 l3 O# v1 V
Background:6 ]) p1 B6 d) B, F; W! _
An increasing number of Notebook PCs require AC Adaptors to provide output power of up to 150 W9 v! N9 R/ F# W+ S% ~ j* `
at an ambient of up to 40 °C (due Pentium-4 devices). Although designed with a very good efficiency,
# z8 ]+ u: M+ w: h) Athe losses still result in high operating temperatures.
+ _' @% x" G/ S6 qProblem:
% W4 q! U1 u! X; U' p4 m) @. jIEC 60950:99 refers in several subclauses and in Annex P to IEC 60320 series as relevant IEC
7 g3 S! r' C- ?8 d) I" Y8 ycomponent standard for appliance inlets.
" Y! @$ T) ]2 z; s) k; N' uHowever, there aren't any specific temperature limits for appliance inlets specified in table 4A parts 18 E% \2 }1 z3 i' ~4 S. _& g
and 2." s1 J& d$ S) P. P' N7 I3 S
This results in a non-uniform interpretation whether:
, G7 D, x- `+ E1 v: C$ U(a) the temperature limit of external surfaces of equipment which can be touched (95 °C
9 `3 i: O$ y& k# K( z- ifor the plastic housing of the appliance inlet)0 W! f# H5 y$ t4 K
OR
* n9 f' z+ v3 K* [(b) the temperature limit of IEC 60320-1 (70 °C for the pins of the appliance inlet for cold! S- _% w4 x% _" A- y" {9 Q
conditions)
+ z: Z4 f+ x ishall be chosen for the assessment of the maximum temperature of the appliance inlet.
- I Y# {; o% d" LA clarification for following would be helpful:1 Z& ]& g0 ~% ]/ v0 Q! O# ?
(i) Is (only) the maximum temperature of the appliance inlet housing to be measured?! `+ M& S9 c) W/ g& p
OR
& P9 W% U: y+ {$ z(ii) Is it necessary to measure besides the temperature of accessible surfaces as well
/ c2 k# `# \6 t/ ethe maximum temperature of the pins of an appliance inlet (test location as required) o3 G3 i; x7 j* v
according to IEC 60320-1)?
6 u+ l6 }# C4 h5 }/ C" jDecision:
. v; u, k1 }+ [2 ^8 {9 ^( a3 wFor testing of a product incorporating IEC 60320-1 type appliance inlets, the temperature limits and- H9 A) G, ], W
locations for temperature measurements as described in IEC 60320-1 shall apply:3 c: H, L* s1 p
• 70 °C maximum pin temperature for appliance inlet for cold conditions. R- e2 M! N0 n; C! G
• Test location: Base of the pin (part of the pin where it protrudes from the engagement face)& `3 i; U5 E1 U. M- \
The temperature rise shall be determined at the maximum room ambient temperature as declared by
* I* t& S8 j. y' r hthe AC Adaptor's manufacturer.8 U3 t) S5 b' u# J* S. f4 _5 O
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发表于 2012-11-6 14:41
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