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引用第20楼anquanbiao于2008-03-03 16:58发表的 :8 T* \: P* k3 f5 t+ H2 }
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?# j7 `7 H6 q% W$ J0 H' F
附:
" r- u3 I" @1 w1 Z2 I8.5.4 An encapsulant, ground, or interwinding insulation whose principal constituents (base resin, filler,! n5 {; a; J) k" b6 Y
reinforcement, flame retardant, heat stabilizer, and anti-oxidant) are found, based on documentation, to
+ \, c2 v' T) e* o1 p$ ^be identical in composition and proportion to those of an encapsulant, ground, or interwinding insulation
# f9 ]. V; p0 y# |4 ]/ t3 U0 G8 Qpresently specified in an insulation system shall be accepted in the system without additional tests when
- I! L( X+ D( L+ J% @; Mboth the following conditions are met:& i( U5 Q$ z" I. s& S
a) The assigned relative thermal indices (electrical and mechanical) and minimum thickness of& I- x! u4 k9 T t9 u( m$ Z, t. J
the substitute material are equal to or greater than those of the presently specified material;& d. }! w9 j( I, w2 }' K2 n
b) The substitute material differs from the presently specified material only with respect to* L8 o8 y2 L# G t/ r9 P; u- r8 G
molecular weight, lubricant, nucleating agent, anti-static agent, colorant, or particle size. |
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