| 摘要 |
This disconnect contact assembly comprises a tubular insulator projecting forwardly through a grounded metal plate and surrounding the usual bridging contact subassembly. A current transformer secondary assembly surrounds the tubular insulator. Two separate metallic coatings are provided on the tubular insulator, the first one on the outer peripheral surface of the insulator and the second one on the inner peripheral surface of the insulator. The first metallic coating is normally at ground potential and the second one is normally at the potential of said bridging contact subassembly. In addition, two semiconductor coatings, each having non-linear resistivity properties, are provided on the tubular insulator. The first semiconductor coating is disposed on the external surface of the tubular insulator at the forward end of said first metallic coating. The second semiconductor coating is disposed on the internal surface of the tubular insulator at the forward end of said second metallic coating.
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