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给出结论要有理有据。下面是引用UL标准中的一段话：' ]+ H# [/ @. R! z. U0 [9 E5 U# s
electrical (prevention of dielectric breakdown and, i. D. ?, h. _ t* J6 }
excessive leakage current), mechanical without impact (functional support of electrical conductors and
0 x5 D2 V5 i A3 Hsupporting members), mechanical with impact (for prevention of accessibility to live parts and for- t" X$ F' X5 p6 \6 M4 h2 x" u0 n4 l
continued maintenance of electrical spacings)
B% Y9 R, ]9 g7 m下面的是引用UL网站的：
, I# V: u* N0 P# @$ \ Z) W# nRelative temperature index (RTI)6 n) I6 y, h% ?' I, H4 S
. _& n9 e0 _( u$ }3 g' T/ r; BMaximum service temperature for a material where a class of critical property will not be unacceptably compromised through chemical thermal degradation. This spans over the reasonable life of an electrical product, relative to a reference material having a confirmed, acceptable corresponding performance defined RTI.9 i- V$ T: d# h6 A
RTI electrical! z" u" k" C) P$ P( Q* L% t
) [' K3 X' j, N0 p. A% ]! }The electrical RTI is associated with critical electrical insulating properties.
1 H; S f6 d+ G$ ]2 i: jRTI mechanical impact
- k0 J+ L( L) a" l4 l. R; H) {0 k& H8 D
The mechanical impact RTI is associated with critical impact resistance, resilience and flexibility properties.
7 f7 e+ q% @4 i/ i8 L q/ VRTI mechanical strength, M6 n B' ]$ ^5 e. s% @$ t
$ J4 Q+ q8 b7 } @2 S! mThe mechanical strength (mechanical without impact) RTI is associated with critical mechanical strength where impact resistance, resilience and flexibility are not essential. |
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