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|  DSH 638* A" w$ e5 q6 p' y7 G
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| Resistance to heat and fire' }+ N2 m9 l, z( h& o5 S, a- d+ y
| 30.2.3.1
# Q {" s0 y, b* ^ s' G | 60335-1(ed.4)$ l$ P. O9 P- f3 ` V7 W% e. G
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! @% X1 n0 N# c* p+ z7 K1 |Question:
: s/ t5 _3 i8 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"
5 X6 S3 q3 H4 T+ ?# [' VCertain 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.
) r: U% G X: S5 W. OShall the current in these periods of the motor be ignored, independently of its duration, in order to compare with the 0,2 A limit?5 w, y0 H0 f+ L3 j. t& I% b6 _
Decision:
1 c# b% ~+ ]: l* P3 [The 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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