Application of IEC 60320-1 type appliance inlets+ ^1 X6 N# B' ~# T) v
1.5.2, 4.5.1$ u8 K$ u% y; P" o3 D& R, f7 k
60950(ed.3) 8 y" F; v- f5 L* O8 o1 F
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Standard(s): 0 u$ ?9 b7 d* `( w% S3 u, t9 g) JIEC 60950:1999 $ X& v0 P2 D+ z( R/ ]Sub clause(s): % }) s5 I8 \; q# |1.5.2, 4.5.1 8 ]1 @& G) v" X2 h9 TDec. NO.9 U) L M# @1 X- O
DSH-548 3 {9 p! r& ]0 Y1 i4 g5 o, iSubject: / _( \3 E# O, d6 l, }$ @ nApplication of IEC 60320-1 type3 e. Y& C) p5 I" E
appliance inlets+ V6 k; \7 l; l! Q. W* S
Key words:8 Z8 u% M; `4 f7 @) x9 \
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Decision taken at the 41st # ?9 G6 `; J# [: h) Q% k" k* YCTL meeting. h( d4 k3 K5 h( Q
Question: & ]4 }' ?; E- f" q: rBackground: , O" l' d# F' n6 {0 K0 {1 a6 MAn increasing number of Notebook PCs require AC Adaptors to provide output power of up to 150 W " ?! e, p. S% _* Wat an ambient of up to 40 °C (due Pentium-4 devices). Although designed with a very good efficiency, U9 E0 l; d9 j7 j9 t' L
the losses still result in high operating temperatures.& g& f( D1 Y: {1 @0 Q
Problem: ' ?7 r0 `- X" L+ |9 \2 |IEC 60950:99 refers in several subclauses and in Annex P to IEC 60320 series as relevant IEC; D! l7 O! P1 G; ^" }
component standard for appliance inlets.& T, q1 L" d, N4 X6 j
However, there aren't any specific temperature limits for appliance inlets specified in table 4A parts 1 $ S6 \" S1 Z& T+ Band 2. , v) B. `# B. hThis results in a non-uniform interpretation whether:# d# Q" F$ ]2 P+ K, \
(a) the temperature limit of external surfaces of equipment which can be touched (95 °C / Q: C0 w# @; v w2 T9 l1 z; r7 E8 ~, kfor the plastic housing of the appliance inlet)! u# a: }6 s5 P" g6 g* x* \
OR ) K6 [! v L' F! S: m8 ^ o(b) the temperature limit of IEC 60320-1 (70 °C for the pins of the appliance inlet for cold * K1 ?: E1 r [$ D# L& \1 v7 Rconditions), x9 t1 ~; N$ K. ]7 j, C
shall be chosen for the assessment of the maximum temperature of the appliance inlet. : I/ C9 [7 j( p* gA clarification for following would be helpful:" D7 l9 j! I6 R
(i) Is (only) the maximum temperature of the appliance inlet housing to be measured?- v+ g; s- B, c2 |1 b: W5 k; P
OR' X6 J" [2 [( V% B% _/ z3 q
(ii) Is it necessary to measure besides the temperature of accessible surfaces as well) u: L: k2 g, z6 s* s* s
the maximum temperature of the pins of an appliance inlet (test location as required 7 E* t! ?( g" h6 Jaccording to IEC 60320-1)?3 _: g1 `4 L/ {- G1 P. A
Decision:- Y! ?! r: e; G' \0 \9 j
For testing of a product incorporating IEC 60320-1 type appliance inlets, the temperature limits and ; [& K& L- D" K4 h T3 [0 xlocations for temperature measurements as described in IEC 60320-1 shall apply: # c. y- l* }3 ]7 o0 J# n. c7 }0 |3 V• 70 °C maximum pin temperature for appliance inlet for cold conditions + c2 Z i' p) u, E2 x• Test location: Base of the pin (part of the pin where it protrudes from the engagement face)# S* i% s/ \0 {( O; X6 Y
The temperature rise shall be determined at the maximum room ambient temperature as declared by: j0 P/ X4 u1 I z( Y7 I' B
the AC Adaptor's manufacturer.5 T1 V8 h0 X3 L. x' ~
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[attach]77153[/attach]- P0 c. c4 G* j( ]4 a 作者: 305634483 时间: 2014-10-31 09:28
zhe shi zemen biaozhun
DSH 548- P) o$ V; Z( R; }; ?! C