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引用第20楼anquanbiao于2008-03-03 16:58发表的 :
, g9 K$ @' b: ?RTI 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?1 P- C" w/ d D5 z9 e
附:
& R/ L" t& L6 _* }: y8.5.4 An encapsulant, ground, or interwinding insulation whose principal constituents (base resin, filler,
* J/ M+ |5 `5 A0 e2 Ereinforcement, flame retardant, heat stabilizer, and anti-oxidant) are found, based on documentation, to A$ @' W2 t& {4 \; v. K
be identical in composition and proportion to those of an encapsulant, ground, or interwinding insulation6 p+ E; G- G: _! N0 E- s, g
presently specified in an insulation system shall be accepted in the system without additional tests when% h0 }% J- {8 [5 P4 g
both the following conditions are met:
% G# u1 L, J& [, |% da) The assigned relative thermal indices (electrical and mechanical) and minimum thickness of* D: @ U" y: B
the substitute material are equal to or greater than those of the presently specified material;! E; g" W# F* `* I
b) The substitute material differs from the presently specified material only with respect to
& s9 ]! u, V$ k% Dmolecular weight, lubricant, nucleating agent, anti-static agent, colorant, or particle size. |
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