a cable sheath

Abstract

The invention provides a cable sheath. The cable sheath comprises an insulation base, a supporting part, an electric conduction post and a grounding wire. The insulation base is provided with insertion holes where cable connectors are inserted into, electric conduction portions are arranged on the inner walls of the insertion holes, and the cable connectors are electrically connected with the electric conduction portions after being inserted into the insertion holes. The supporting part is arranged on the insulation base. The electric conduction post is movably arranged on the supporting part and can be connected with or disconnected from the electric conduction portions through moving. The grounding wire is electrically connected with the electric conduction post. According to the cable sheath, the electric conduction post can be connected with or disconnected from the electric conduction portions on the insulation base through moving according to actual conditions so that the cable connectors can be selectively grounded or not, the cable connectors are not grounded when users may use a reserve power supply and are grounded when the users do not use the reserve power supply, and therefore the construction safety can be improved on the premise of not damaging electric appliances of the users.

Description

technical field [0001] The present invention relates to the technical field of electric power system, and more specifically, relates to a cable sheath. Background technique [0002] In the power system, it is often necessary to carry out cable construction in tunnels or trenches. Generally, there will be twenty or thirty or more operating cable bundles near the construction site. Each cable bundle is composed of multiple cables, and each Cable connectors are provided on the cables. The low-voltage cable connector needs to be removed during construction, but the leakage phenomenon is more likely to occur at the cable connector. If these running cables suddenly leak electricity when the staff is working, it will cause injury to the staff, cause a safety accident, and have a large potential safety hazard. . [0003] In order to ensure construction safety, the operator will provide grounding protection for the removed low-voltage cable joints. However, when the cable joints ar...

AI Technical Summary

Problems solved by technology

The low-voltage cable connector needs to be removed during construction, but the leakage phenomenon is more likely to occur at the cable connector. If these running cables suddenly leak electricity when the staff is working, it will cause injury to the staff and cause a safety accident, which has a large potential safety hazard

[0003] In order to ensure construction safety, the operator will perform grounding protection on the removed low-voltage cable joints. However, when the cable joints are grounded, if there is a user using a backup power supply, reverse power transmission will occur, which is more likely to cause damage to the user's electrical appliances

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