DSH 638 Resistance to heat and fire
http://decisions.iecee.org/icons/ecblank.gif DSH 638
Resistance to heat and fire
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"
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.
Shall 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.
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