DSH 374 Normal load conditions

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广东安规检测
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小型摆管淋雨试验机

IPX5X6X7喷水试验机

1000L恒温恒湿箱

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灯具防风罩

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家电125mm试验指

E12灯头量规

无绳壶无绳电熨斗插拔寿命试验机

IEC60335试验指甲

DSH 374

Normal load conditions 3 R- i3 B9 I8 B& l( y. H! D& t

4.11

60335-2-40(ed.2) & 60335-2-40(ed.3) & 60335-2-40(ed.4)

' q7 k3 ]9 ?1 S( g$ VStandard: IEC 60335-2-40
$ c# g/ [0 G" f& {- m4 LSub clause: 4.11
& ~2 s7 h  k" X8 y! iSheet n. 374 Page 1 (1)
( _* G' p. ?- V3 R+ nSubject: Normal load conditions
6 l  m5 R3 i  ^% b* w5 X, P" k9 ~Key words: - Worst condition   - Manufacturer data
Decision confirmed at CTL 38th meeting
Question:
% t7 p+ @" Q6 o, n0 z) P8 |6 GAir conditioners are required to be tested at the worst conditions within the range advised by the manufacturer.
* j4 J/ N7 a2 ~5 L1 O4 _) e( r  lSome laboratories are carrying out extensive testing (up to 50 load tests) to determine the worst condition
" |2 G2 E8 V4 d8 D2 Y8 P$ Bwithin the specified environmental range.
Is this degree of testing required? Can the manufacturer advise of the conditions that are most likely to produce
worst conditions (highest compressor current) and the laboratory carry out verification tests over a small
4 J- }2 T  g$ ~. _; A9 m. Benvironment range?
# C4 Q8 @( k) U3 G. A! B; ?Decision:
  ~( [) x+ n6 I' M- O5 JManufacturer’s data and advice may be used to ascertain the worst case for loading within the specified
" h& e; ^6 p9 Q: Y3 t$ k0 Xenvironmental range. Laboratories must confirm the operating conditions but do not need to conduct extensive
surveys over the whole operating range.

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