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

Resistance to heat and fire ( l/ u, Z* J! X8 `9 v

30.2.3.1 + t& o7 Z) G8 B2 t: \& V

60335-1(ed.4)

Question:
; P/ X* A7 a9 wSub-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"
8 T, D$ r7 S2 w# i4 F; `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.
& n5 f; D4 ~6 sShall 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 u/ V, p9 r8 W0 x# QDecision:
The current to be considered will be the average current in the relevant operating period.


. B5 u9 p$ ?' V8 g