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绝缘系统定义(UL1446):! @' J' |- f' [4 J( I+ ?' e- s) W
4.5 INSULATION SYSTEM – A unique intimate combination of two or more insulating materials used in
: U6 t- u* b; X! p3 R i" b$ lelectrical 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! ?# u9 x; x9 J" y' j% d9 I; r( H1 d
unique groups. When multiple groups exist, either within a given insulation system or a different1 Y$ M2 Y' R2 K3 X2 l- ~
insulation system, components of one unique group shall not be added to another unique group.
7 M( V+ L' ~- G" g: P/ r! t, SHowever, more than one group is able to be used within a single device when at least a 3.05 mm3 o, J( f' U' X, d
(0.125 inch) air space is used to separate them. Any material or component existing outside the outer
4 n" r Z. J1 r& i, ]wrap of the device or not in contact with the windings is not determined to be part of the insulation
# N+ h k4 T" G: N# q% T, Q: z$ _system. |
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