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|  DSH 4748 O& u6 r4 |% V6 F: f8 Z
' \5 D5 t% ?$ J4 G/ X# _; h3 N% V | General conditions for the tests
8 P$ e& F& H8 i) x0 d# i2 A* B | 4.12$ } b, y+ J& j: C
| 60335-1(ed.3)
& B3 x* Q! t4 W, z( H* g |
& q( }6 P) Y& p) rStandard: IEC 60335-1:1991, 3rd Ed.
' n) k$ i ^" o. XSub clause: 4.12
: u* _, R/ Y( g' ZSheet No. DSH-474
8 x9 R( M7 @5 k9 y, f0 p+ M( U9 ]Subject: General conditions for the tests' C S w, |' C4 F: z& w
Key words: - supply voltage3 O6 O/ e$ _3 s. O
Decision taken at the 40th CTL meeting 2003+ u6 s1 k7 U1 x5 T: g7 R$ o* O
Question:% Y* Z o2 H7 i; D& D
In the case of heating elements without appreciable positive temperature coefficient of2 {0 t$ X6 i& a4 x" K7 C7 U
resistance, should the supply voltage be adjusted during performance of the test?& r/ j9 m/ N' `. F! b' f4 A7 k
Rationale:
( M" i% k2 n$ v: VSee question.
7 }* C) B2 T( d( RDecision:
3 x2 ~* X3 z7 e; hThe voltage shall be continuously adjusted to obtain the intended input.. t! }/ n U ^# X% i8 [
- u$ V+ S6 o' M' ~2 Z% f1 ]) u$ X0 c; c
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发表于 2012-9-12 12:46
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