DSH 474 General conditions for the tests

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DSH 474 ! ~+ V, y2 {+ B* D- T' }% [( K8 t3 Y

General conditions for the tests 0 N' x" b; R5 _% M

4.12 9 R1 l! h; }- g' U

60335-1(ed.3)

Standard: IEC 60335-1:1991, 3rd Ed.
* X& S% P3 O4 p2 I# PSub clause: 4.12
Sheet No. DSH-474
( K5 ?, ^; H( }/ ^) ASubject: General conditions for the tests
Key words: - supply voltage
7 i4 Y7 @$ H, i, `( Q$ uDecision taken at the 40th CTL meeting 2003
Question:
In the case of heating elements without appreciable positive temperature coefficient of
resistance, should the supply voltage be adjusted during performance of the test?
Rationale:
& V: [- B- x: `See question.
$ v! m7 _3 Q2 [4 y3 k7 p. aDecision:
9 [- u* o  h; M' r# ]1 AThe voltage shall be continuously adjusted to obtain the intended input.
# O) `6 Y+ n. Z, A& F6 x& }