Electrical insulators, materials and equipment
An elongate high voltage insulator ( 2 ) is formed of a rod or tube ( 4 ) of insulating material, with a pair of electrodes ( 6 ) spaced apart longitudinally thereof. At least part, and preferably the whole of the outer surface of the insulating material ( 4 ) is covered by a layer of material ( 8 )...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | An elongate high voltage insulator (
2
) is formed of a rod or tube (
4
) of insulating material, with a pair of electrodes (
6
) spaced apart longitudinally thereof. At least part, and preferably the whole of the outer surface of the insulating material (
4
) is covered by a layer of material (
8
) comprising a particulate filler of varistor powder in a matrix having a switching electrical stress-controlling characteristic that is in electrical contact with each of the electrodes (
6
). The insulator core (
4
) may be made of porcelain, and the stress-controlling material (
8
) may comprise zinc oxide. |
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