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引用第20楼anquanbiao于2008-03-03 16:58发表的 :
% s, s) |: [/ MRTI 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?
0 z) \- H% y! L附: # ?6 p7 w' F+ D& Z& E
8.5.4 An encapsulant, ground, or interwinding insulation whose principal constituents (base resin, filler,
- K; ?3 \. K$ v8 {reinforcement, flame retardant, heat stabilizer, and anti-oxidant) are found, based on documentation, to
, W% a! v, L: T( A% l- V# dbe identical in composition and proportion to those of an encapsulant, ground, or interwinding insulation' ~; k2 I3 K# u x
presently specified in an insulation system shall be accepted in the system without additional tests when( u c7 k7 G* v4 J
both the following conditions are met:
+ ]5 f1 T/ [% o, ~( }. O4 va) The assigned relative thermal indices (electrical and mechanical) and minimum thickness of' M, U8 b! W+ H, V& K! H1 U
the substitute material are equal to or greater than those of the presently specified material;5 K0 x2 b' _* f, Y( e0 ?
b) The substitute material differs from the presently specified material only with respect to
2 ^3 ?1 | V1 K: P2 k9 W5 u; V9 E7 Amolecular weight, lubricant, nucleating agent, anti-static agent, colorant, or particle size. |
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