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引用第20楼anquanbiao于2008-03-03 16:58发表的 :4 F0 |0 Y' U9 N9 r j1 w
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?
3 h' @- G2 c9 M" l" w% C v5 e附: 5 m) B" u6 R9 n6 y
8.5.4 An encapsulant, ground, or interwinding insulation whose principal constituents (base resin, filler,
+ @4 r& {+ \! Q P7 `! x( [$ rreinforcement, flame retardant, heat stabilizer, and anti-oxidant) are found, based on documentation, to! F' ?, q0 U) F, f& x
be identical in composition and proportion to those of an encapsulant, ground, or interwinding insulation
: v: o+ X; z: h3 Bpresently specified in an insulation system shall be accepted in the system without additional tests when6 B' `( V$ g3 a3 G4 d
both the following conditions are met:( _% U$ I+ V$ \6 r) M
a) The assigned relative thermal indices (electrical and mechanical) and minimum thickness of0 A3 Y/ S6 i4 c, V$ h8 p0 n
the substitute material are equal to or greater than those of the presently specified material;7 `1 E# x) ]. l2 w
b) The substitute material differs from the presently specified material only with respect to) R) i" y4 p+ h! n8 O
molecular weight, lubricant, nucleating agent, anti-static agent, colorant, or particle size. |
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