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|  DSH 580
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# W# l3 S. y3 h | Resistance to heat and fire
! A9 C8 y5 ^4 Q7 p. J5 I i8 S | 30.2.3.1 a4 S2 J) u7 S& K! d
| 60335-1(ed.4)9 h) |5 I3 Y8 E) j
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1 `1 T: D: V/ W0 s& BQuestion:
6 W% n% s1 j% T( [/ d; uThe sub-clause 30.2.3.1 requires the glow wire test on three specimens according to IEC 60695-2-12 to verify the GWFI of 850 °C of insulating materials supporting connections for current exceeding 0,2A and of parts of insulating material within a distance of 3 mm of such connections. As there are many difficulties to receive from the manufacturers the three specimens required for the GWFI test, is it possible to accept a declaration of the manufacturer, with reference to the thickness and colour, that the plastics used have a GWFI of 850 °C? Or the document 61/2869/CDV which is under vote during the IEC/TC61 has to be taken into
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$ g" f# O+ e$ K: aDecision:' P$ B+ L1 c/ V% o$ T; e
The glow wire test may be used as alternative of GWFI test, according to the document 61/2869/CDV.5 w, R* X' M z! o
The alone declaration of the component manufacturer concerning GWFI test is not accepted.- Q: Q8 b' a) \9 s5 k( |
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发表于 2012-9-8 19:48
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