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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：/ S3 |( l {; H T! Y
electrical (prevention of dielectric breakdown and
8 ~( M. \) M- }$ a+ ^+ {! L' B/ \excessive leakage current), mechanical without impact (functional support of electrical conductors and
& Z- ~4 J0 v# s [supporting members), mechanical with impact (for prevention of accessibility to live parts and for% w& W# N# S! u, }* H/ x4 j
continued maintenance of electrical spacings)4 }: ]/ Q4 ]$ P' q# r( F. ]
下面的是引用UL网站的：
# C: g7 [! a, S e2 @9 ~Relative temperature index (RTI)
; B& S Y) Y5 a# A
6 d7 j& S, ` d5 }. ZMaximum 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.! }% u- m& x9 B
RTI electrical
1 m+ l# Q& s4 i. ~8 w* I& Y' U2 K: W, K8 r+ r& {
The electrical RTI is associated with critical electrical insulating properties.
( l) q% ^: ~* XRTI mechanical impact
: x; R( B/ K$ S) o$ t& G4 a3 [( @! S6 t# w5 b8 K+ B
The mechanical impact RTI is associated with critical impact resistance, resilience and flexibility properties.
5 Q5 z# n/ {5 CRTI mechanical strength
- Q9 A' R5 Q8 K" f, z& a( e
! Z ~8 v7 v7 [+ BThe 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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发表于 2010-10-20 17:31
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