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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：* P4 T( {2 r6 w
electrical (prevention of dielectric breakdown and6 @* u* Y0 F- l( d
excessive leakage current), mechanical without impact (functional support of electrical conductors and0 |/ F+ s. q- \8 q* Q# q
supporting members), mechanical with impact (for prevention of accessibility to live parts and for. Z ~7 o7 ]. U2 l/ ^. }8 @1 ?
continued maintenance of electrical spacings)- @( M1 r& v* g0 }0 K6 ]
下面的是引用UL网站的：# E! D1 b7 g' S% w/ o
Relative temperature index (RTI)
) t# J3 C6 \ U. c6 @* D
! `" W$ G+ U: i0 N: B* W* v: q OMaximum 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.
1 g$ E2 Y3 [. B$ w, i. N: t& e7 QRTI electrical
9 A5 C2 J0 T9 \+ L" \8 `- Q; z8 D' N' x: C+ J: `, _! `2 H" e
The electrical RTI is associated with critical electrical insulating properties./ l e5 b5 w, g3 P& a
RTI mechanical impact8 T( ~8 x/ E, B; P* s- D
0 j$ ?0 e/ t* [ c1 v" _
The mechanical impact RTI is associated with critical impact resistance, resilience and flexibility properties.
3 |- w( |3 B1 P- J4 [; t3 _; xRTI mechanical strength9 Y! `$ ]* \! } D+ B2 Z
2 F# _0 {& D$ U" e; v, s. HThe 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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