Electrical apparatus including electric field control means
AssigneeABB Power T&D Company Inc.
InventorsThomas J. Lanoue, Terry D. Barber, Michael E. Haas
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Abstract
A coil for an electrical apparatus such as a transformer is disclosed which includes an electric field control means to minimize flashover or arching at a lead of the coil.
Claims15
A transformer comprising a core and at least one coil winding, said coil winding having a lead, and field control means operatively associated with said lead for controlling the electric field generated when said lead is carrying current said field control means comprising a conductive wire formed into an elongated spiral having a central opening therethrough, said lead passing through said opening.
A transformer comprising:
- at least one coil, said coil having at least one lead through which an electrical connection is made to said transformer, and
- field control means disposed in surrounding relationship to said at least one lead for presenting a surface to any electrical field generated when said at least one lead carries current, said field control means comprising a conductive wire.
A coil for a transformer, said coil including a lead through which an electrical connection is made to said coil and field control means electrically connected to said lead for presenting a surface in spaced relationship to said lead, said surface being operative to control an electrical field emanating from said lead, said field control means comprising a helical coil of conductive wire.
A coil for an electrical apparatus, said coil comprising a lead through which an electrical connection is made to said coil and electric field control means electrically connected to said lead for providing a surface surrounding said lead, said electric field control means comprising a conductive wire.
Dependencies are inferred from the claim text.