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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：
# @0 r# G4 g" }0 H2 Q- p- Q“A unique intimate combination of two or more insulating materials used in" P+ o* |7 C3 @* Y7 v0 e& I* ~; t
electrical equipment. One example of this is the combination of magnet wire, ground insulation, varnish,
6 A% u7 T" U! t7 Klead wire insulations, and outer wrapping of a coil. These intimate combinations are evaluated as
/ X* U7 J+ K* z" funique groups. When multiple groups exist, either within a given insulation system or a different
j4 s5 m! B, a5 N* Cinsulation system, components of one unique group shall not be added to another unique group.
1 [! f2 a: {& j# Q4 pHowever, more than one group is able to be used within a single device when at least a 3.05 mm
# M( B, p7 C8 [" M(0.125 inch) air space is used to separate them. Any material or component existing outside the outer
$ m; `- k9 {4 Z4 F1 K# y" `5 J" lwrap of the device or not in contact with the windings is not determined to be part of the insulation
. J* v- P) Y# ]% X7 |/ ~2 N2 J6 d1 Zsystem.” |
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发表于 2010-10-26 07:44
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