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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：. k7 r. @# c/ `' K) }
electrical (prevention of dielectric breakdown and$ L9 _% U* E. _( W
excessive leakage current), mechanical without impact (functional support of electrical conductors and, w1 D% p# u- V
supporting members), mechanical with impact (for prevention of accessibility to live parts and for! L* D9 G4 ~) ]8 C) p, V
continued maintenance of electrical spacings)( v# J& `" m$ b) }: T0 }+ u$ c
下面的是引用UL网站的：0 E1 e4 l, W% w4 ?: F6 x) D
Relative temperature index (RTI)6 i- _' @9 \! W6 Y, e0 e: V
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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., s( O) W# d8 p9 D2 Y% D) h( p- k) I
RTI electrical s1 l7 X9 H9 f1 V! k# Y9 ~4 n' M
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The electrical RTI is associated with critical electrical insulating properties.+ f; y1 h) ~+ C& A: `6 o2 [* p
RTI mechanical impact
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# y1 N0 n' S: `+ y7 ]The mechanical impact RTI is associated with critical impact resistance, resilience and flexibility properties.6 t$ N: h! G6 {) k7 D
RTI mechanical strength6 {+ y5 ?. D& R0 T9 [4 i4 y& P
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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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