DSH 638 Resistance to heat and fire

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广东安规检测
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IEC60335试验指甲

DSH 638 # s8 e( l1 ^$ }  J6 A, B* a8 j. @3 |- n

Resistance to heat and fire

30.2.3.1 ; f5 g% r. p1 R/ M1 N6 z8 o

60335-1(ed.4)

Question:
( w9 f( A4 x( l2 b$ n3 J0 JSub-clause 30.2.3.1 reads: "parts of insulating material supporting connections that carry a current exceeding 0,2 A during normal operation, and parts of insulating material within a distance of 3 mm of such connections, shall have a glow-wire flammability index of at least 850ºC according to IEC 60695-2-12, the test sample being no thicker than the relevant part"
7 Y0 }- X$ ]0 R# w3 jCertain motors, have a nominal current around 0,2 A (for example, the pump of a washing machine), but during a certain time (for instance, because changes in the load, or the in-rush current) the current exceeds the limit of 0,2 A.
% Y* z7 R. }- J1 HShall the current in these periods of the motor be ignored, independently of its duration, in order to compare with the 0,2 A limit?
Decision:
The current to be considered will be the average current in the relevant operating period.
$ T5 _' o8 n- R3 Y' O

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