Application of IEC 60320-1 type appliance inlets 3 l! p( J! |7 J
1.5.2, 4.5.1 " q6 X& ~7 x6 E1 |; D% q+ M+ N
60950(ed.3)5 Z \2 w( r5 _/ C2 Q) c
/ v- C( w. K* l1 n, j2 F* vStandard(s):5 Y- z* S. M. C3 B4 X
IEC 60950:1999 & v' [7 H7 A5 \4 ZSub clause(s): 1 o& R* e" X2 q: j/ L2 g" `5 ^1.5.2, 4.5.1, m. c* E" T: M; r/ N- j
Dec. NO. Q$ l, G* j. P. V
DSH-548 + M( q$ @9 H6 X" y2 b% eSubject:0 [4 H- m: C9 k/ D$ }
Application of IEC 60320-1 type2 ^% J( v; _- _1 n" y; M" _* v
appliance inlets 8 E$ n8 n f+ W7 c* H: \8 ~7 aKey words:# ^4 K7 s$ S; H9 ~4 K" s
--- " b- p! |+ A7 y k% K' RDecision taken at the 41st6 X+ y; w0 h8 X
CTL meeting. . Z# B0 t3 X! b7 R' O! oQuestion: ) R! d6 Z8 H! i$ f5 ZBackground:6 t/ B U/ L$ v* w
An increasing number of Notebook PCs require AC Adaptors to provide output power of up to 150 W - z0 g* B. V' @/ Dat an ambient of up to 40 °C (due Pentium-4 devices). Although designed with a very good efficiency, . c" p H. j3 [* J. b ythe losses still result in high operating temperatures.3 m; L1 {, w# o }5 B, w# u5 k
Problem: , X W. v3 d5 J) W+ p! YIEC 60950:99 refers in several subclauses and in Annex P to IEC 60320 series as relevant IEC# `4 R" J9 j* j( w) g' N5 q
component standard for appliance inlets.. C+ N. @, l$ K( w
However, there aren't any specific temperature limits for appliance inlets specified in table 4A parts 1 5 O9 l3 J% I) cand 2.7 y7 v! e+ i/ A) f
This results in a non-uniform interpretation whether: ) d7 H3 ?* S$ K5 ~6 }(a) the temperature limit of external surfaces of equipment which can be touched (95 °C ( Y. A; ~+ z( _# `% q U4 [for the plastic housing of the appliance inlet) p3 `$ j- F7 T. `4 X) n
OR$ x' g. I. A: Z9 g2 J0 T, J. I1 Q
(b) the temperature limit of IEC 60320-1 (70 °C for the pins of the appliance inlet for cold . L! b; Y/ s4 h. Cconditions) Q6 T& B5 a2 f fshall be chosen for the assessment of the maximum temperature of the appliance inlet.2 m( w* V5 g) v, _% F5 R
A clarification for following would be helpful: ' o, c/ Z9 c' I. K! B9 z% _2 z% Y(i) Is (only) the maximum temperature of the appliance inlet housing to be measured?2 M) k: A& I, d# U; g: h4 e
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(ii) Is it necessary to measure besides the temperature of accessible surfaces as well 4 J9 E4 }% M5 gthe maximum temperature of the pins of an appliance inlet (test location as required6 J$ D- ~2 {0 ^% Q# ]9 O
according to IEC 60320-1)? 3 C D- x5 P6 J1 K. t- F) V EDecision:; I2 e& w d8 C, y8 C" w7 Z
For testing of a product incorporating IEC 60320-1 type appliance inlets, the temperature limits and+ \$ C7 E+ r: G! t5 M: r& h+ n* m
locations for temperature measurements as described in IEC 60320-1 shall apply:6 Q( P8 B% ^, q+ y' P% y
• 70 °C maximum pin temperature for appliance inlet for cold conditions 3 W2 S/ k" U8 Y) m6 k( N) a• Test location: Base of the pin (part of the pin where it protrudes from the engagement face) ' S1 {& a* O6 n& c7 {, H& E+ JThe temperature rise shall be determined at the maximum room ambient temperature as declared by ! q' Z C$ u' d9 H7 K8 `$ Cthe AC Adaptor's manufacturer.- F; Q$ |4 e/ |% R; x
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[attach]77153[/attach] 7 \( J3 i2 F2 o' ~" |1 V: ^/ n3 o: A作者: 305634483 时间: 2014-10-31 09:28
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DSH 548