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|  DSH 638( F4 S8 p$ `# O
) r% v' @5 Z' x3 N
| Resistance to heat and fire0 w! Q. i9 s( C- `8 p) C3 m
| 30.2.3.15 Q' y& l# ]2 c# M4 Q; K
| 60335-1(ed.4)3 Q5 ~' A+ u& w7 ? |$ [
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+ T5 r4 `: G1 V, Q8 H
Question:
4 y* h% Q! f: [* S! V7 `6 L- p% 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"
7 s+ Z1 z! O" 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.8 {( H, Y: X2 Z8 B6 w6 l6 H
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?
' l. z2 m3 U, q. L* e9 ZDecision:1 ` T+ h Q3 D
The current to be considered will be the average current in the relevant operating period.( q, f0 k3 |0 q& u6 j C3 Y
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发表于 2012-9-8 15:38
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