DSH 638 Resistance to heat and fire

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广东安规检测
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小型摆管淋雨试验机

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DSH 638 $ C$ g! G, B1 \4 N0 z 4 b6 r/ z% e5 F. Y

Resistance to heat and fire ' N/ H2 t) N0 ~& @2 K/ A% V: V

30.2.3.1

60335-1(ed.4)

Question:
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"
, a. o* O: ~7 I# X1 e( Q3 zCertain 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.
- }7 h" O$ }' |! d) m; \: y  Z; k8 }. WShall the current in these periods of the motor be ignored, independently of its duration, in order to compare with the 0,2 A limit?
+ F: h# U- j$ @1 d9 EDecision:
* G& t8 d& K# R# x3 EThe current to be considered will be the average current in the relevant operating period.
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