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有,IEC60335-1 的29章里,根据CTI来划分材料等级的6 @/ Z. X" M8 J$ c" W( f# ?1 y
IEC60335-1:2001+A1:2004+A2:2006
7 s) w9 o6 C! AThe relationship between the material group and the comparative tracking index (CTI) values,
& W" B- D. r0 L$ Yas given in subclause 2.7.1.3 of IEC 60664-1, is as follows:
8 {, ?, {( @2 U' I, a9 ^+ J! p4 N– material group I: 600 ≤ CTI;
( z5 i: a' t4 a1 x– material group II: 400 ≤ CTI < 600;; `/ v+ L" X9 O- K& O% e: I
– material group IIIa: 175 ≤ CTI < 400;( i; `! ?& j: Q$ D; t
– material group IIIb: 100 ≤ CTI < 175, |
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