Multicore cable
AssigneeSumitomo Electric Industries, Ltd.
InventorsKenji Hori, Takumi Ooshima, Takashi Yabe, Ryota Fukumoto, Yutaka Matsumura
Life of this patent
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Abstract
A multicore cable includes an oil absorptive interposition, and a core disposed to surround the oil absorptive interposition and including electrical wires. The electrical wires are twisted together. In a cross-section perpendicular to a longitudinal direction of the core, the core has layers in which the electrical wires are arranged on circumferences, and an innermost layer of the layers is closest to the oil absorptive interposition. A twist pitch of the electrical wires in the innermost layer is greater than or equal to 0.45 times and less than 0.8 times a twist pitch of the electrical wires in an outermost layer of the layers.
Claims5
A multicore cable comprising:
- an oil absorptive interposition;
- and
- a core disposed to surround the oil absorptive interposition and including electrical wires, the electrical wires being twisted together,
- wherein, in a cross-section perpendicular to a longitudinal direction of the core, the core has layers in which the electrical wires are arranged on circumferences, and an innermost layer of the layers is closest to the oil absorptive interposition,
- wherein a twist pitch of the electrical wires in the innermost layer is greater than or equal to 0.45 times and less than 0.8 times a twist pitch of the electrical wires in an outermost layer of the layers,
- wherein the core has three or more of the layers made up of the electrical wires, and
- wherein a twist pitch of the electrical wires in an intermediate layer is greater than or equal to 0.7 times and less than 0.95 times the twist pitch of the electrical wires in the outermost layer, the intermediate layer being adjacent to the outermost layer and being disposed at a position closer to the oil absorptive interposition than the outermost layer is.
Dependencies are inferred from the claim text.