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引用第20楼anquanbiao于2008-03-03 16:58发表的 :
! g5 G0 _$ K/ Q7 [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?) t* `' Y) _! p& e; W! G1 x
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) x. o9 l! e3 p" U- F: I. A3 c3 t- P8.5.4 An encapsulant, ground, or interwinding insulation whose principal constituents (base resin, filler,
. ?7 R7 C: [! V+ e5 c+ ~ dreinforcement, flame retardant, heat stabilizer, and anti-oxidant) are found, based on documentation, to3 m# i& f1 `) O7 |0 r% O. z/ q
be identical in composition and proportion to those of an encapsulant, ground, or interwinding insulation
" c: G+ a2 Q. q: o* {6 w Tpresently specified in an insulation system shall be accepted in the system without additional tests when# B2 B5 F3 F( w: W0 U% v
both the following conditions are met:
! w! P9 D$ N: `% \a) The assigned relative thermal indices (electrical and mechanical) and minimum thickness of+ ~! o% c2 |' V8 T
the substitute material are equal to or greater than those of the presently specified material;: f- N% q& q9 n! o {2 ?
b) The substitute material differs from the presently specified material only with respect to5 f. `) Z5 `! F7 P2 ~1 }: u
molecular weight, lubricant, nucleating agent, anti-static agent, colorant, or particle size. |
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