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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:
9 n" Q5 l0 }4 S“A unique intimate combination of two or more insulating materials used in$ a7 I$ O! \! Y3 S+ P
electrical equipment. One example of this is the combination of magnet wire, ground insulation, varnish,
" X- [: H7 f) q2 W6 H- plead wire insulations, and outer wrapping of a coil. These intimate combinations are evaluated as
9 ^' a' O( q: {" w& W# l% _unique groups. When multiple groups exist, either within a given insulation system or a different
& i* l2 P* v; i0 S, cinsulation system, components of one unique group shall not be added to another unique group., @9 e9 v0 B6 }
However, more than one group is able to be used within a single device when at least a 3.05 mm
( w& t/ i( B# Q5 X# g(0.125 inch) air space is used to separate them. Any material or component existing outside the outer: e! ]. r. T: u( F' G
wrap of the device or not in contact with the windings is not determined to be part of the insulation3 x3 X3 X! O/ {
system.” |
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