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|  DSH 4745 M( X7 C3 L" R; b* E
. j" ]4 p7 `! u; U- W) s | General conditions for the tests Z& T0 O+ C$ Q% m% D- _
| 4.12
4 Z1 A- g0 T2 f1 }* e | 60335-1(ed.3)- W: P! q+ j: f/ y8 u
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Standard: IEC 60335-1:1991, 3rd Ed.
y3 Z! Z( M- dSub clause: 4.12
# j& ?# B2 G+ L" u3 }! _Sheet No. DSH-474
* T; A! U$ j4 ~ @5 OSubject: General conditions for the tests0 y% t+ {! w0 x8 T& g! m' j
Key words: - supply voltage
N& K+ M3 ~4 @' g! uDecision taken at the 40th CTL meeting 20031 N1 \' m) L9 F; t1 ?& `7 D
Question:
8 k8 X8 K8 X9 ?$ Q! RIn the case of heating elements without appreciable positive temperature coefficient of
0 _/ N1 w# x4 Sresistance, should the supply voltage be adjusted during performance of the test?
. y, L% D* B U- J- S- E% h# d) H) I/ uRationale:
/ A% s, F/ @3 uSee question.6 s! c& }' E Y, P% J# e) o
Decision:
2 H4 _% s3 u: Y" q+ LThe voltage shall be continuously adjusted to obtain the intended input.
! s0 b! ?% t5 x3 f* [2 Y# `+ i- A5 _. ]. k3 a2 g# ?
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发表于 2012-9-12 12:46
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