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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:; u" |$ x: x3 J
electrical (prevention of dielectric breakdown and
1 h" Z1 G1 N8 C# V; u6 l7 uexcessive leakage current), mechanical without impact (functional support of electrical conductors and
+ g. N; D) n+ x* p: F4 A, Lsupporting members), mechanical with impact (for prevention of accessibility to live parts and for
A" k4 h6 b: ucontinued maintenance of electrical spacings)+ S3 C7 m! k2 }& k% c9 J4 T$ \
下面的是引用UL网站的:- r9 ~& L" W9 L8 |' H- B4 R
Relative temperature index (RTI)9 A9 a" @# s3 @0 x8 K; y
3 t( b: v( C: @1 P0 XMaximum 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 j0 `+ R( S+ c, o
RTI electrical
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( Q7 G8 A6 D% e7 |The electrical RTI is associated with critical electrical insulating properties.
1 g) X8 T( B) M3 u @RTI mechanical impact
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The mechanical impact RTI is associated with critical impact resistance, resilience and flexibility properties.7 x1 k. C: R3 L1 ?; o. d" h
RTI mechanical strength
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$ R3 u+ x! l( k, k8 K+ ~The 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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