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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：5 L0 [# g% s' u$ d+ i. ?3 D
electrical (prevention of dielectric breakdown and
* J' R& W9 M6 zexcessive leakage current), mechanical without impact (functional support of electrical conductors and
! [3 W* C. [# _: e6 \, ~supporting members), mechanical with impact (for prevention of accessibility to live parts and for
4 V1 v6 I; e! ~1 L+ Hcontinued maintenance of electrical spacings)
H; G* f; N& P! ?下面的是引用UL网站的：
8 C6 B$ M; X8 ~+ A# |, H TRelative temperature index (RTI)' A+ \6 t9 O8 h1 P. }8 \5 y
7 m, M9 R- {$ f4 y! b" m5 X L% a
Maximum 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.$ P, W4 U' O( t4 {
RTI electrical
; t d$ Y& V0 s/ C/ v7 d0 H# l: x) E' Q
The electrical RTI is associated with critical electrical insulating properties.
: Q1 c6 _+ ]" W5 _5 h6 J/ bRTI mechanical impact
) ]9 W! v4 Z, c. |& t
# ~0 O; z- x8 W: vThe mechanical impact RTI is associated with critical impact resistance, resilience and flexibility properties.
7 j# j! }4 k9 i2 MRTI mechanical strength
& C; e( K: Q) X; W M
$ U: A( q- q; }9 wThe 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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