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引用第20楼anquanbiao于2008-03-03 16:58发表的 :
0 U# X) m, |% e) e2 w2 SRTI 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?
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/ z8 H7 I' q5 T8 l8.5.4 An encapsulant, ground, or interwinding insulation whose principal constituents (base resin, filler,* p1 f6 M) `) M0 r2 i
reinforcement, flame retardant, heat stabilizer, and anti-oxidant) are found, based on documentation, to
: Y* F9 i) i5 l( N8 R4 ^be identical in composition and proportion to those of an encapsulant, ground, or interwinding insulation2 J) s" o6 Y- l7 B1 _6 }
presently specified in an insulation system shall be accepted in the system without additional tests when9 o$ p- y6 h0 q/ r4 M% B
both the following conditions are met:- P8 X }, E3 n# R
a) The assigned relative thermal indices (electrical and mechanical) and minimum thickness of
' L( S/ H: e5 Ythe substitute material are equal to or greater than those of the presently specified material;$ v. H# d2 ^5 T8 [- s; ?$ i& _9 h
b) The substitute material differs from the presently specified material only with respect to( f- A Z& v2 j5 p3 r( p) f
molecular weight, lubricant, nucleating agent, anti-static agent, colorant, or particle size. |
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