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|  DSH 374: y" C; \+ z' E9 b% U2 R3 d
/ G7 q0 x5 ]9 v& e! z! T: y2 y6 | | Normal load conditions
% W8 x& q; v- G% K% R | 4.11
) Z6 A# ~$ D% r% q | 60335-2-40(ed.2) & 60335-2-40(ed.3) & 60335-2-40(ed.4)
$ A/ ~- V# ^# @0 z' \# m |
; ?: b& e* K$ `Standard: IEC 60335-2-40& U$ T' C- I& b3 R2 b
Sub clause: 4.111 Q) U! s( l) K6 c
Sheet n. 374 Page 1 (1)
9 b2 U! m1 W+ a- m# JSubject: Normal load conditions2 Y$ L7 a/ X9 }: L
Key words: - Worst condition - Manufacturer data
0 o; i( ?2 S- d) G" E4 \Decision confirmed at CTL 38th meeting/ @7 v) c, [8 B& @' v+ u: z0 D
Question:
2 G: k# E6 Z" x" bAir conditioners are required to be tested at the worst conditions within the range advised by the manufacturer.1 d0 [& U7 @$ V6 e# x! m0 |
Some laboratories are carrying out extensive testing (up to 50 load tests) to determine the worst condition9 B; f3 M( a5 r4 w
within the specified environmental range.! ]3 y: S4 y0 o3 V6 [$ ]! m
Is this degree of testing required? Can the manufacturer advise of the conditions that are most likely to produce
. @4 ~9 a s/ p4 R' P/ V" p/ Uworst conditions (highest compressor current) and the laboratory carry out verification tests over a small
, v6 i6 s* r9 j8 `. A, ]environment range?
/ Y$ L1 C4 R2 F4 q% m) PDecision:1 T9 Q/ Y$ J6 G+ R( N0 [1 @
Manufacturer’s data and advice may be used to ascertain the worst case for loading within the specified$ B% o4 S- X. I2 a" q" u: H
environmental range. Laboratories must confirm the operating conditions but do not need to conduct extensive3 n# d2 _! f2 r
surveys over the whole operating range.
% s4 }4 C2 a3 g( ~1 L# P* L+ [; A
" v, B5 \4 K. j" M6 `
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发表于 2012-9-14 13:10
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