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标题: Delta T=ΔT [打印本页]
作者: Jessie.Jiang    时间: 2012-4-1 11:12
标题: Delta T=ΔT
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- U; J2 ]* @8 v7 Z" d
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以下是客户的原话  P1 @" z9 G# M% ~2 C' _" @
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Body material

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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.
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For 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).
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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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作者: jsspace    时间: 2012-4-1 11:21
本帖最后由 jsspace 于 2012-4-1 11:23 编辑 ' x& B* K5 r! B# y/ J5 \1 f) `
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热保护式控制装置的温度标志9 [; L; I# h/ I
就是一个三角形，里面写一个温度的值，请参考IEC613473 G7 P1 n# x( P* K% t: V
作者: fasten    时间: 2012-4-1 13:21
就是温升的意思，Temperature Rise=ΔT，不要穿马甲就不认识了嘛
作者: lpx0218    时间: 2012-4-1 14:18
稳升的表示啊,只不过用英文表示了



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