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看下标准《ul446Systems of Insulating Materials– General》应该有帮助,其中INSULATION SYSTEM定义为:
" |7 S. O8 M/ |“A unique intimate combination of two or more insulating materials used in$ l( \4 E4 g: \) w) [
electrical equipment. One example of this is the combination of magnet wire, ground insulation, varnish,
% o, Q1 y: {1 i- s: Ylead wire insulations, and outer wrapping of a coil. These intimate combinations are evaluated as" Y, u7 V h, y: U+ Q# w$ B6 S% p3 K
unique groups. When multiple groups exist, either within a given insulation system or a different' M/ t% q6 {. ~+ w b' |
insulation system, components of one unique group shall not be added to another unique group.
9 a* a8 u2 j, w1 Y5 g& K; xHowever, more than one group is able to be used within a single device when at least a 3.05 mm
, @( n% J; W/ T5 A+ L(0.125 inch) air space is used to separate them. Any material or component existing outside the outer
K+ L- l0 b$ w0 wwrap of the device or not in contact with the windings is not determined to be part of the insulation
8 }) b9 m' r. bsystem.” |
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