OVERHEAD GROUND WIRE CABLE Russian patent published in 2009 - IPC H01B5/08 

FIELD: electric engineering.

SUBSTANCE: invention relates to electric engineering. The overhead ground wire cable consists of central steel wire (1) having D₁ diametre. The first layer in the cable consists of seven wires (2) having D₂ diametre, while the second layer is composed of interchanging seven steel wires (3) of D₃ diametre and seven steel wires (4) of D₄ diametre. The third layer of fourteen steel wires (5) of D₅ diametre is implemented so that the first, second and third layers have similar lays in one direction and linear contact with the first, second and third layers. The diametres ratio is as follows D₁ : D₂ : D₃ : D₄ : D₅ = (1.81-1.9):(1.3-1.36):(1.3-1.36):1:(1.6-1.67). The external surfaces of the third layer wires are laid with a gap sized as 3-5% from nominal wire diametre. They are plastically deformed, and contact surface area between the third layer wires is increased as well as the contact surface between the first and second layer wires. Generally, the overhead ground wire cable is tightened.

EFFECT: increased stability of overhead ground wire cable to lightning, vibration impacts and to short circuit impacts and etc.

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