Fast secondary cable loop line checking instrument

Abstract

The invention discloses a fast secondary cable loop line checking instrument and belongs to the field of verification equipment. The instrument comprises an A terminal and a B terminal, and the A terminal and the B terminal are respectively connected with the two ends of a detected secondary loop cable; the A terminal comprises a boosting power source DC1 and n parallel-connected control branches, the n control branches are connected in parallel and then are connected with the anode of the boosting power source DC1, and the cathode of the boosting power source DC1 is grounded; one end of each control branch is connected with the anode of the boosting power source DC1, the other end of each control branch is provided with a splicing fitting Ja used for connection with any one core in the detected secondary loop cable; the B terminal comprises n parallel-connected indication branches, the n parallel-connected indication branches are of the same structure, each indication branch comprises a B-end indication lamp Lb and a B-end positive diode Db connected in series therewith; and one end of each indication branch is grounded and the other end is provided with a splicing fitting Jb used for connection with any one core in the detected secondary loop cable. The fast secondary cable loop line checking instrument has the advantages of high portability, simple operation and accurate and visual test result.

Description

technical field [0001] The invention belongs to the field of calibrating equipment, and in particular relates to a quick-type secondary cable loop calibrating instrument. Background technique [0002] Secondary cable laying and replacement are not only the most common tasks in the infrastructure acceptance, overhaul technical transformation and maintenance pre-test work of relay protection professional. Furthermore, because the correctness of the secondary cable circuit plays a decisive role in the correct operation of the relay protection device, the calibration of the secondary cable is an extremely important task. [0003] Common secondary circuit calibration tools are a multimeter and a cable. This calibration method requires several wirings. Each wiring can only complete the calibration of one loop. The wiring is cumbersome, and the calibration work not only needs to find the correct It is also necessary to make sure that there is no short-circuit connection between ea...

AI Technical Summary

Problems solved by technology

[0003] Common secondary circuit calibration tools are a multimeter and a cable. This calibration method requires several wirings. Each wiring can only complete the calibration of one loop. The wiring is cumbersome, and the calibration work not only needs to find the correct It is also necessary to make sure that there is no short-circuit connection between each circuit, and the calibration speed is slow; ordinary infrastructure inspection and calibration work takes 2-3 hours to complete, and the calibration time is relatively long; and it requires two people to cooperate to complete, and the work efficiency is low.

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