Teaching tool for testing faults of power cable

Abstract

The invention discloses a teaching tool for testing faults of a power cable. The teaching tool comprises an upper computer, a fault tester and a rheostat, wherein the upper computer is connected with the fault tester; the fault tester is used for carrying out waveform data acquisition and processing and is communicated with the upper computer to send waveform data to the upper computer to display; the fault tester is connected with the rheostat by a communication coaxial cable and fault setting is carried out by adjusting the resistance value of the rheostat to simulate a cable fault; and the fault tester comprises a single chip microcomputer, an acquisition module, an A/D (Analogue/Digital) conversion module, a data storage module and an interface circuit. With the adoption of a separable structure, the tester is connected with the upper computer to realize man-machine conversation and improve the stability and the universality of the system; existing high-voltage equipment is not used so that the safety is high; a testing waveform effect is clearer than that of the power cable and fewer disordered waveforms exist; and the teaching tool is suitable for training in various fields so that a lot of training cost is saved and the time and the labor are saved.

Description

technical field [0001] The invention specifically relates to a teaching tool, in particular to a teaching tool for power cable fault testing. Background technique [0002] In the cable industry, the search for cable faults is relatively difficult and difficult to master. It is a job with strong technical and experience. The difficulty of fault test finding lies in the identification of fault waveforms, which requires testers to correctly identify waveforms. Therefore, the performance indicators, operation steps and test methods of the cable fault test instrument are particularly critical. [0003] However, the various cable fault testing instruments currently used in practice are expensive, bulky, tedious operating procedures, complicated wiring methods, unsafe on-site work, and the waveform display has large interference and non-standard waveforms, making it difficult to identify waveforms. [0004] It takes a long time to train a qualified cable fault tester, and at leas...

AI Technical Summary

Problems solved by technology

[0003] However, the various cable fault testing instruments currently used in practice are expensive, bulky, tedious operating procedures, complicated wiring methods, unsafe on-site work, and the waveform display has large interference and non-standard waveforms, making it difficult to identify waveforms.

[0004] It takes a long time to train a qualified cable fault tester, and at least three years of on-site test experience are required; at present, to carry out fault test training, it is necessary to combine cables of sufficient length with bulky cable fault testers, operation boxes, Connect important equipment such as high-voltage generators, simulate the use of cables and various fault conditions; each equipment is heavy and bulky, and there is a potential safety hazard of electric shock during the test process of connecting test equipment to high-voltage generators, and the training site will occupy 9m 2 The above site, and the various fault settings of the cable are also difficult, and the fault site is not easy to simulate; it brings a lot of trouble to the training work

[0005] Based on the above factors, fault test training is affected by conditions such as site, manpower, environment, equipment, risk factors, and fault point settings, which brings a lot of inconvenience to the training work, resulting in large investment in fault test training, complicated training process, and difficult training. no significant effect

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