Capacitive transition and voltage control device for testing fault of power cable

Abstract

The invention provides a capacitive transition and voltage control device for testing the fault of a power cable and belongs to the field of cable fault testing devices. The device is characterized by comprising a static polar disc (6) and a movable polar disc (5). A capacitive plug-in assembly (12) and a plurality of voltage change-over switches are fixedly arranged on the static polar disc (6). Multiple sets of connection assemblies, fittingly connected with the capacitive plug-in assembly in the plug-in manner, and guide posts (29) used for triggering the voltage change-over switches, are arranged on the movable polar disc (5). Through pulling up, rotating and pressing down the movable polar disc (5), the plug-in operation of the capacitive plug-in assembly (12) on the static polar disc (6) and the triggering effect of the voltage change-over switches are realized. According to the technical scheme of the invention, in the capacitive transition and voltage control device for testing the fault of the power cable, the plug-in state of the static polar disc and the movable polar disc is realized through the rotating and plugging process. Meanwhile, the transition of the capacitance and the transition of the test voltage during the cable testing process are realized. Therefore, the device can be used for testing the faults of cables of different types and different levels.

Description

technical field [0001] The utility model relates to a capacitance conversion and voltage control device for power cable fault testing, which belongs to the field of cable fault testing equipment. Background technique [0002] During the cable fault test, in order to locate the fault, it is necessary to connect a high-voltage generator to one end of the cable to be tested, load the cable with a DC high voltage, and achieve the purpose of fault point penetration, and then receive the sound and magnetic field from the underground through the receiving device Signal. In the actual measurement, it is often difficult to detect the sound and magnetic field signal of the discharge due to the reasons such as the cable is buried too deep, the site noise is large, and the environmental conditions are poor. way to achieve the purpose of increasing the sound and magnetic field signals of the fault point. If the voltage is raised too high, it will cause damage to the cable under test, s...

AI Technical Summary

Problems solved by technology

[0003] At present, in the process of cable testing, the conversion of high-voltage DC capacitor capacity is mostly realized by connecting the separated capacitors on site. On-site operations are prone to wiring errors, whether the capacitor is completely discharged and other factors are dangerous. At the same time, it is dangerous for operators. High quality requirements, cumbersome operation, waste of time

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