请教大家IEC里面是否有个“Delta T”的温度要求？是客户针对壶身外壳材料的要求时提到的
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以下是客户的原话1 K) H# C. B; w6 b, X- a
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The body material need a flame retardantfor UL (so it should have a V-grade) and we must avoid Brominated FlameRetardant (Bfr free) for Philips policy.
7 Z' `0 l/ V$ a! U" G& c3 hFor IEC we don’t need a flame retardantsince it is not in contact with live parts but we need to fulfill the AbnormalUse requirement (short circuit of the relay and TCO) where the surfacetemperature shouldn’t go above a certain temperature (delta T) andshould not melt (if it melts should be that the clearance distances are stillOk and should be no access to the live parts but we prefer it not melts in thiscase). ; j2 F0 X+ W8 F/ B9 i& C3 R Z
For SRA (internalPhilips Safety Risk Assessment) we short circuit also the fuses and inthis case we need to see how it melts and if the live parts get accessible(that is not allowed).
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发表于 2012-4-1 11:12
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发表于 2012-4-1 13:21
