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|  DSH 474
9 V- b5 T( k9 h% ]6 O+ f" u" p7 p) R" d4 ^* D+ w
| General conditions for the tests
) H5 Z% D4 V4 V5 I, M, K5 f | 4.12
" L5 Q6 b. z+ x: p4 M( S# Z; y | 60335-1(ed.3)
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Standard: IEC 60335-1:1991, 3rd Ed.1 k1 T2 h* g: L" E: ?" K
Sub clause: 4.121 |* D1 r$ v# O( H9 b9 H4 C
Sheet No. DSH-474
- s, p* R$ u$ p2 `6 D/ vSubject: General conditions for the tests
0 v& ]! X2 k- L* C/ c, ^+ CKey words: - supply voltage
+ X! Q1 n, W* {# pDecision taken at the 40th CTL meeting 2003% O9 I, K0 n; M0 y) E0 o3 G
Question:3 r5 F$ c: i( F" J1 p6 }& e
In the case of heating elements without appreciable positive temperature coefficient of. |7 C7 r2 W Q2 p: n
resistance, should the supply voltage be adjusted during performance of the test?
- ]6 |4 U0 l' q; _7 cRationale:4 @; g5 Z0 S- b6 U
See question.
9 [& X, r0 K- e" n7 k6 uDecision:
- x- q3 ?6 ]4 k: WThe voltage shall be continuously adjusted to obtain the intended input.$ }/ f/ J5 \) w; F2 _% h4 P0 P
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发表于 2012-9-12 12:46
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