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|  DSH 638
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; \. A* X- W, @/ |5 m2 \ y6 ] | Resistance to heat and fire$ `: U" o! L# G. ~$ U
| 30.2.3.1/ e4 R k9 B* i8 p
| 60335-1(ed.4): q5 e+ P( m$ D5 u* @9 Z% \# t* S
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Question:
9 N8 g; ^; a6 ~5 b' W. q3 ~, ~Sub-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"
) W H8 m0 M$ |- X$ C% h, ^Certain 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.
5 P( [3 R* ^" ^8 RShall the current in these periods of the motor be ignored, independently of its duration, in order to compare with the 0,2 A limit? A8 P3 U5 o) D1 t! B- l
Decision:
. ]1 l& W7 e M& d3 e8 G w+ g; Y% EThe current to be considered will be the average current in the relevant operating period.
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发表于 2012-9-8 15:38
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