A method for identifying cables to be repaired by using cable identification strips

Abstract

The invention discloses a cable recognition bar, and the bar comprises a resistor wire which is wrapped by a thermosensitive coating layer. The thermosensitive coating layer is wrapped by a transparent insulating sleeve. The method comprises the following steps: disposing one cable recognition bar outside each cable in parallel in a manner of bundling during the laying of cables; enabling the head ends of all cable recognition bars to be grounded during the maintenance of cables; enabling the tail ends of the cable recognition bars corresponding to to-be-maintained cables to be connected into a low-voltage current; determining that the cable corresponding to the cable recognition bar with the color of the thermosensitive coating being changed is determined as the head end of the to-be-maintained cableafter the change of the thermosensitive coating changes, and switching off the power switch of the cable; taking out the to-be-maintained cable and the corresponding cable recognition bar, enabling a new cable and a cable recognition bar to be laid in a main cable trench and a corresponding branch cable trench, and enabling the new cable to be connected into a circuit. The cable recognition bar cannot be affected by an external environment, can recognize the direction of the cable clearly and accurately, is safe in operation, and provides safety guarantee for a maintenance worker.

Description

technical field [0001] The invention relates to a method for identifying cables in cable overhaul operations, in particular to a method for identifying cables to be overhauled by using cable identification strips. Background technique [0002] In the process of laying cables, usually a plurality of cables are laid in the same main cable trench, and each cable passes through the branch cable trenches on both sides of the main cable trench at last. Since multiple cables are interlaced in the main cable channel, and the cable transmission distance is too long, it is difficult to identify the trend of the maintenance cables in the future maintenance process. At present, the method of identifying the trend of the maintenance cables is: the first one is in each cable Bind the same identification plate every certain length on the cable, and determine the trend of the corresponding cable by looking for the same identification plate bound at the beginning and end of each cable; The ...

AI Technical Summary

Problems solved by technology

[0003] In the first method, due to the long-term exposure of the identification plate in the cable trench, the identification plate is easy to fall off from the cable due to weathering or the identification plate is blurred, resulting in the failure to identify the cable

In the second method, when the signal generator and signal receiver of the cable identification instrument are installed on the cable, the probes on the signal generator and signal receiver need to be pierced into the insulation on the cable, so that the signal generator and signal The probes on the receiver are respectively in contact with the cable cores in the insulation. Since there is current flowing through the cable cores, especially in the case of high-voltage currents, maintenance workers are prone to electric shock accidents due to improper operation, which seriously endangers maintenance. worker's life safety

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