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有,IEC60335-1 的29章里,根据CTI来划分材料等级的) J7 e) [' x+ m# P/ P
IEC60335-1:2001+A1:2004+A2:2006
' E H3 h( j, L, V! V1 q, N! ~The relationship between the material group and the comparative tracking index (CTI) values,
9 q. G+ H& d8 i2 Pas given in subclause 2.7.1.3 of IEC 60664-1, is as follows:
1 N2 Q- a) I; |8 w7 m' n6 R" h– material group I: 600 ≤ CTI;
7 b+ g; v/ m Q* R- K5 a* L# @0 c– material group II: 400 ≤ CTI < 600;0 r2 q& j$ n& D$ V4 F
– material group IIIa: 175 ≤ CTI < 400;
4 L# `8 R( H" e+ h/ a– material group IIIb: 100 ≤ CTI < 175, |
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