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引用第20楼anquanbiao于2008-03-03 16:58发表的 :1 j; ^/ D/ ]) x& v" b- ^9 Q
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?
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8.5.4 An encapsulant, ground, or interwinding insulation whose principal constituents (base resin, filler," |2 b g# [. s! i# `4 o
reinforcement, flame retardant, heat stabilizer, and anti-oxidant) are found, based on documentation, to9 e5 G. f! N) R' E7 J# \8 m2 ]
be identical in composition and proportion to those of an encapsulant, ground, or interwinding insulation1 y" ?* Q( P3 Y% I3 q
presently specified in an insulation system shall be accepted in the system without additional tests when( N# e3 a" v; \$ @* b0 L
both the following conditions are met:
: E! Q3 z: E: e3 ?. Ha) The assigned relative thermal indices (electrical and mechanical) and minimum thickness of( U1 u6 w% q: M% r+ X
the substitute material are equal to or greater than those of the presently specified material;9 L; L; \5 A, _+ r
b) The substitute material differs from the presently specified material only with respect to
: T# m6 v. I, y* [4 R0 Bmolecular weight, lubricant, nucleating agent, anti-static agent, colorant, or particle size. |
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