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| Application of IEC 60320-1 type appliance inlets
7 u& S* v% y, z2 h# U; e1 `/ E | 1.5.2, 4.5.1
( A1 u x3 z5 n& K | 60950(ed.3)4 S1 D7 x! F% s5 Z. A$ V
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Standard(s):" K' ]: R8 M9 R8 c; q% k
IEC 60950:19999 c& n9 D7 V0 U1 y N0 L
Sub clause(s):
1 S6 K8 M$ z$ ~7 B* ]7 C1.5.2, 4.5.1
( H& C3 B: f6 e" |( UDec. NO.
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Subject:' W4 Y5 p2 G& S8 B' U% [# j5 g, P: ~6 Q
Application of IEC 60320-1 type) o# u. y# t. H- T
appliance inlets
P( K8 F7 K; s0 f, SKey words:; w0 V5 l4 a" }* ?9 j
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. r1 A$ {, R! w; r$ wDecision taken at the 41st7 P, B2 j" N9 [
CTL meeting.
- T# S3 R0 j0 \" K3 E( GQuestion:
" ]/ k. h' b, d' p6 f% g) K& @Background:8 {! B( V6 [5 F
An increasing number of Notebook PCs require AC Adaptors to provide output power of up to 150 W
8 e6 g, Y9 O; q: W. \# b. yat an ambient of up to 40 °C (due Pentium-4 devices). Although designed with a very good efficiency,6 K7 ?# c! t5 O4 k0 C! l0 `
the losses still result in high operating temperatures.
; h% l% w+ }9 A' }0 J4 b8 `; vProblem:
6 g) T. j4 x/ B+ x, IIEC 60950:99 refers in several subclauses and in Annex P to IEC 60320 series as relevant IEC9 A+ a9 h. z. |- ~. u
component standard for appliance inlets.
) ^- G( X* w u9 d, ZHowever, there aren't any specific temperature limits for appliance inlets specified in table 4A parts 18 }/ {/ ?4 e& {9 E( V$ x/ ^
and 2.8 Q+ |& M3 l5 W: l2 x
This results in a non-uniform interpretation whether:- Y3 c* a% Y8 j* A8 n
(a) the temperature limit of external surfaces of equipment which can be touched (95 °C
) ^, J& I* z c+ ]- {for the plastic housing of the appliance inlet)
/ ^' O# Q% q0 j- S7 {OR
( }: B$ i: h' N ~. r(b) the temperature limit of IEC 60320-1 (70 °C for the pins of the appliance inlet for cold. g* J$ J; E7 H: k4 y# k
conditions)% J* \4 C$ _$ N7 W1 n+ A, {
shall be chosen for the assessment of the maximum temperature of the appliance inlet.3 d5 f3 H& Y K, U# u( ]( }% Y
A clarification for following would be helpful:9 d! K+ I) O$ [: B% ^( T
(i) Is (only) the maximum temperature of the appliance inlet housing to be measured?
& P8 [7 n5 C5 J4 Y& A+ I/ D- KOR9 D3 v" H) u$ r& ?/ u# j3 E1 f) F) Y
(ii) Is it necessary to measure besides the temperature of accessible surfaces as well5 U% q' c7 I% ]6 }) l9 g& }- x) e+ n* }
the maximum temperature of the pins of an appliance inlet (test location as required
{. F9 p9 J: }3 E% R) Caccording to IEC 60320-1)?$ J$ ^/ p% ]3 Z
Decision:- r, T* R6 O' z
For testing of a product incorporating IEC 60320-1 type appliance inlets, the temperature limits and
9 X) M4 u* b7 t( q) H# |locations for temperature measurements as described in IEC 60320-1 shall apply:' x) E2 ]% J1 i# a" V* t8 ]
• 70 °C maximum pin temperature for appliance inlet for cold conditions, {% x H$ n7 g* w/ Y
• Test location: Base of the pin (part of the pin where it protrudes from the engagement face)
' K' E) `8 D( y7 z- f8 \The temperature rise shall be determined at the maximum room ambient temperature as declared by- Y) _# l% a" d- U f
the AC Adaptor's manufacturer.1 y4 {$ C1 X3 P6 J3 }. a
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