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绝缘系统定义(UL1446):" p1 U6 h; g2 H5 V- T
4.5 INSULATION SYSTEM – A unique intimate combination of two or more insulating materials used in
" J8 i5 m# C3 f7 ^ ~; I, ?electrical equipment. One example of this is the combination of magnet wire, ground insulation, varnish, lead wire insulations, and outer wrapping of a coil. These intimate combinations are evaluated as
2 o8 q# W. g+ c6 v/ |# junique groups. When multiple groups exist, either within a given insulation system or a different" M8 F# W( a% P9 f
insulation system, components of one unique group shall not be added to another unique group.& C* Q) p- J# Q! |: H$ s% |7 q' W8 Q
However, more than one group is able to be used within a single device when at least a 3.05 mm
2 ?. |7 R9 I `$ m# T% |(0.125 inch) air space is used to separate them. Any material or component existing outside the outer# y, M( W$ p* Z% D% O: U
wrap of the device or not in contact with the windings is not determined to be part of the insulation& |: A2 [7 D0 e: A x! P8 q
system. |
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