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|
|  DSH 374
- y* z4 m& i1 u' l9 Y8 u3 G6 y$ D( ~: h8 G. z6 c
| Normal load conditions6 c6 x* i" H2 N' S7 d! H
| 4.11
9 ?* Q7 C/ _! E6 _2 O | 60335-2-40(ed.2) & 60335-2-40(ed.3) & 60335-2-40(ed.4)
" A2 i; g* s! H |
+ f0 n( d# k$ e) j# z( {9 XStandard: IEC 60335-2-40
$ J' Z" [# ]$ I8 eSub clause: 4.11
: \! |2 \: y6 \ n. j# C$ }( aSheet n. 374 Page 1 (1)0 P4 \" ?6 Z9 ?2 a, z h
Subject: Normal load conditions
2 e W, ~) [ _" _5 q9 gKey words: - Worst condition - Manufacturer data4 B: C6 C. B$ b! R7 I1 ?
Decision confirmed at CTL 38th meeting
4 A3 Q, I7 h5 `Question:
1 G3 ^2 d6 n1 w" lAir conditioners are required to be tested at the worst conditions within the range advised by the manufacturer.
' |( Z" s0 @* ]- A; i$ u5 d' Y6 {, f) aSome laboratories are carrying out extensive testing (up to 50 load tests) to determine the worst condition
) n, S% a6 P, i8 M9 Kwithin the specified environmental range.1 |( C- K! A* m) [+ ~0 M
Is this degree of testing required? Can the manufacturer advise of the conditions that are most likely to produce P( _# i- N9 g$ ?1 h
worst conditions (highest compressor current) and the laboratory carry out verification tests over a small
$ T/ @% Z( }9 w. A" j! S* senvironment range?' @1 O! Q2 f' N/ ]- O
Decision: a) a0 h! g. t3 E
Manufacturer’s data and advice may be used to ascertain the worst case for loading within the specified$ }8 Q2 F" U: P# q) d! S
environmental range. Laboratories must confirm the operating conditions but do not need to conduct extensive
& V8 u! Y9 X- d6 e7 R# Q2 I3 Zsurveys over the whole operating range.* ]0 U9 j( ?; p8 W+ [# o/ v" _
8 s" i0 q. u. S* J' G/ u9 v1 M, x
- y2 w( R) x& n3 u |
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