Power cable
First Claim
1. An electrical power cable comprising:
- a ground conductor;
a first insulating material layer disposed about the ground conductor;
a plurality of line conductors, each covered with a second layer of insulating material and circumferentially disposed side by side about the first insulating material layer;
a plurality of neutral conductors, each covered by a third layer of insulating material and circumferentially disposed side by side about the first insulating material layer;
a fourth layer of insulating material surrounding the plurality of line conductors and the plurality of neutral conductors;
an outer conductive shield disposed about the fourth insulating material layer;
an outer insulating layer disposed about the outer shield; and
wherebythe magnetic field interaction between the plurality of line conductors and the plurality of neutral conductors is less than the magnetic field interaction in an electrical power cable having a single line conductor and a single neutral conductor of substantially equal current carrying capacity to the current carrying capacity of the plurality of line conductors and the plurality of neutral conductors.
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Accused Products
Abstract
An electrical power cable includes a central ground conductor surrounded by an insulating material layer. An inner grounded shield is formed on the surface of the ground conductor or between the ground conductor and line and neutral conductors. A plurality of insulated line conductors and a plurality of insulated neutral conductors are circumferentially disposed in an annular arrangement about an insulation layer on the inner shield. The plurality of line and neutral conductors are each disposed circumferentially side-by-side in separate groups of line and neutral conductors. The total cross-sectional area of each group of line conductors and neutral conductors is substantially equal to the total cross-sectional area of a single large conductor of equivalent ampere rating. An outer shield is disposed about the line and neutral conductors and covered by an outer insulating layer. PVC insulation surrounds all of the conductors and is used to form the shields and other insulating layers to minimize movement of the individual conductors within the cable.
53 Citations
30 Claims
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1. An electrical power cable comprising:
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a ground conductor; a first insulating material layer disposed about the ground conductor; a plurality of line conductors, each covered with a second layer of insulating material and circumferentially disposed side by side about the first insulating material layer; a plurality of neutral conductors, each covered by a third layer of insulating material and circumferentially disposed side by side about the first insulating material layer; a fourth layer of insulating material surrounding the plurality of line conductors and the plurality of neutral conductors; an outer conductive shield disposed about the fourth insulating material layer; an outer insulating layer disposed about the outer shield; and
wherebythe magnetic field interaction between the plurality of line conductors and the plurality of neutral conductors is less than the magnetic field interaction in an electrical power cable having a single line conductor and a single neutral conductor of substantially equal current carrying capacity to the current carrying capacity of the plurality of line conductors and the plurality of neutral conductors. - View Dependent Claims (2, 5, 12, 13, 14, 15, 16, 17, 19, 20, 21, 23, 24, 25, 26, 27, 28)
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3. The electrical power cable of claim 3 wherein:
the first, second, third, fourth and the outer insulating material layers are formed of a substantially non-compressible material. - View Dependent Claims (4, 6, 7, 8, 9, 10, 11, 18, 22, 30)
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29. An electrical power cable comprising
a ground conductor; -
a first insulating material layer disposed about the ground conductor; a plurality of line conductors, each covered with a second layer of insulating material and disposed about the first insulating material layer, the plurality of line conductors disposed side-by-side; a plurality of neutral conductors, each covered by a third layer of insulating material and disposed about the first insulating material layer;
the plurality of neutral conductors disposed side-by-side;a fourth layer of insulating material surrounding the plurality of line conductors and the plurality of neutral conductors; an outer conductive shield disposed about the fourth insulating material layer; an outer insulating layer disposed about the outer shield; and the total cross-sectional area of the plurality of neutral conductors and the total cross-sectional area of the plurality of line conductors is substantially equal to a cross-sectional area of single larger diameter neutral conductor and a single larger diameter line conductor, respectively, of substantially equal current carrying capacity.
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Specification