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引用第20楼anquanbiao于2008-03-03 16:58发表的 :
( M! s w' P4 @4 i8 z/ A8 |- u9 KRTI str 这个应该不需要, 应该看RTI (Elec)... UL 1446中要求替代绝缘要考虑电气的和机械的温度指数(见附文), 但是在实际的UL绝缘系统中,则不一定. 比如P LEO(E20050)的B81绝缘系统,是Class B的, 但是包含Dupont的101F这种材料. 这个怎么理解?! ?, G( {( d4 V; ~$ i' h
附: 5 f* l* ?7 e& F; v# O, b+ c$ D: }
8.5.4 An encapsulant, ground, or interwinding insulation whose principal constituents (base resin, filler,. S) T7 I" a1 H: n$ i& t( V5 h
reinforcement, flame retardant, heat stabilizer, and anti-oxidant) are found, based on documentation, to
' `9 Q9 D' a3 J9 f/ Abe identical in composition and proportion to those of an encapsulant, ground, or interwinding insulation
; \) s5 j% I/ S1 }presently specified in an insulation system shall be accepted in the system without additional tests when
# X4 u& N! B% a' _both the following conditions are met:
& z$ @: V% d# ua) The assigned relative thermal indices (electrical and mechanical) and minimum thickness of
) P) F- R* b9 g) }0 ]& m7 \! jthe substitute material are equal to or greater than those of the presently specified material;+ l$ j0 t* J) [" F+ J9 t- t' h
b) The substitute material differs from the presently specified material only with respect to
8 J4 K' E2 [8 G7 p- ]molecular weight, lubricant, nucleating agent, anti-static agent, colorant, or particle size. |
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