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|  DSH 374
- t+ o, j% ^4 S, t8 _( @! Y4 ?
$ Y$ t# f2 I( o7 p5 y$ | | Normal load conditions
0 r, D* J6 N' d- [8 F& S | 4.119 E& G9 O" \$ w: B2 l6 j5 S
| 60335-2-40(ed.2) & 60335-2-40(ed.3) & 60335-2-40(ed.4)
! T W6 |7 j5 D* k) E$ g |
* h. c* Q! M6 V9 t3 z1 \Standard: IEC 60335-2-40
; k O6 o, N4 S6 j) PSub clause: 4.11
6 N, P& C2 c$ d% a2 W4 c& s" ~1 zSheet n. 374 Page 1 (1): J7 @4 a. y! W% m
Subject: Normal load conditions
0 c* w7 q) K1 u u9 T- W! k1 e7 ^Key words: - Worst condition - Manufacturer data+ B! C9 e; C( b1 `- i
Decision confirmed at CTL 38th meeting a* ^: D9 Q' S# o% o. r! J& U7 S
Question:) o3 e' a/ i1 {" u, L
Air conditioners are required to be tested at the worst conditions within the range advised by the manufacturer.
N# c5 G, G* B' Z: N7 p6 ^+ F% gSome laboratories are carrying out extensive testing (up to 50 load tests) to determine the worst condition
2 u# |8 y% O7 q! ^1 c) |within the specified environmental range.
( J) f. ~7 F. Q# g9 yIs this degree of testing required? Can the manufacturer advise of the conditions that are most likely to produce
4 M |, b4 @6 @6 Q7 Y6 ^9 k) vworst conditions (highest compressor current) and the laboratory carry out verification tests over a small
9 a) G$ g& v, L1 Y( Genvironment range?
' r9 W) H; ?! F: X- V' h9 U5 q# IDecision:5 C& Q5 E# `; ]; R! h
Manufacturer’s data and advice may be used to ascertain the worst case for loading within the specified
1 p D$ B. M/ o% ^! H, N$ senvironmental range. Laboratories must confirm the operating conditions but do not need to conduct extensive
3 }/ N$ S' I6 A) Y- y$ Ysurveys over the whole operating range. }, D* p0 P! f
" R" z* O L; K* @. [/ L6 V
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发表于 2012-9-14 13:10
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