Live recognition method for low-voltage cable line

Abstract

The invention discloses a live recognition method for a low-voltage cable line. Multiple cables with unknown path directions are arranged; the in-phase current values of the head ends and the tail ends of the multiple cables are measured respectively; and if the current values of the head end and the tail end are the same, the head end and the tail end are judged to be located on the same cable line. The live recognition method for the low-voltage cable line has the following advantages that current in the head and tail ends of the cable is measured through a simple and frequently-used device,the measured current in the head and tail ends is then compared, and thus, the cable line of the head end and the tail end can be recognized. The recognition method is simple, convenient and effective, and the needed cost is low.

Description

technical field [0001] The invention relates to a live identification method for low-voltage cable lines. Background technique [0002] In order to make the city tidy and beautiful, many overhead lines have been cabled, which also reduces the failure rate of the lines. Among them, the low-voltage 380V cables directly face the users and connect commercial centers, transportation facilities, and residential buildings. Its importance is self-evident. Metaphor. However, due to the long construction time and the relatively backward management norms of low-voltage cable construction in the early stage, many low-voltage cables lack identification plates and route maps. With the acceleration of infrastructure construction, the number of underground cables is also increasing, resulting in The cable loop cannot be accurately identified, which brings difficulties to the later construction and reconstruction projects. The problems of early low-voltage cables are manifested in the foll...

AI Technical Summary

Problems solved by technology

[0003] (1) The near-end cable terminal of the equipment is inconsistent with the identification plate of the far-end terminal;

[0004] (2) The identification plate of the near-end cable terminal or remote terminal of the equipment is missing;

[0005] (3) The routing diagram of cable equipment is missing

[0008] The use and operation of the cable path detector is relatively professional, and it needs certain experienced personnel to operate and judge, and can accurately identify the cable line, but the instrument is relatively expensive and the cost is high. When using this equipment, and when multiple cables are buried in parallel (multiple cables in the same path), it can only ensure the correct path, and cannot identify which cable it is. In addition, the cable path detector is generally suitable for high-voltage cables, and for low-voltage cables. Not necessarily applicable, other instruments like cable detectors have the disadvantages of high cost and complicated operation, so we need to study low-cost, simple and convenient methods

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