DSH 374 Normal load conditions

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广东安规检测
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IEC60335试验指甲

DSH 374 4 h' a. I) v' e6 b 0 _9 z+ ?; t- T8 K+ v2 ?6 v5 ]

Normal load conditions

4.11

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

Standard: IEC 60335-2-40
- ]& }  g) I% S( ?3 v4 XSub clause: 4.11
Sheet n. 374 Page 1 (1)
! ~2 Q+ V$ X& w$ k( `! d( E* ASubject: Normal load conditions
# B7 N* N4 V3 J8 C1 U  [Key words: - Worst condition   - Manufacturer data
6 K. ?# z$ F6 U" ]9 oDecision confirmed at CTL 38th meeting
9 a" @! k8 k- o* Z( A9 {' p( v0 IQuestion:
/ G: c0 M8 ^9 M  [' f9 c1 }$ ~Air conditioners are required to be tested at the worst conditions within the range advised by the manufacturer.
: N9 x# r& ]. s+ T2 x% w( N  b3 oSome laboratories are carrying out extensive testing (up to 50 load tests) to determine the worst condition
# O3 v/ Z: F1 Kwithin the specified environmental range.
Is this degree of testing required? Can the manufacturer advise of the conditions that are most likely to produce
& j* v4 R( H' _  X1 v* cworst conditions (highest compressor current) and the laboratory carry out verification tests over a small
environment range?
Decision:
8 S3 b. J! b3 c2 l( HManufacturer’s data and advice may be used to ascertain the worst case for loading within the specified
' H# \& V0 Z) r# b2 N  C" B8 Aenvironmental range. Laboratories must confirm the operating conditions but do not need to conduct extensive
. S( V( D; u. M/ ]0 fsurveys over the whole operating range.