High voltage power cable fault alarm device

Abstract

The invention relates to a high-voltage power cable fault alarm device, which includes three fault detection terminals and a fault alarm host. Detect phase-to-phase short-circuit faults; the fault alarm host is installed on the panel of the high-voltage power cable grounding box, and the three input terminals of the fault alarm host are connected to the output terminals of the three fault detection terminals to receive and display fault alarms transmitted by each fault detection terminal information. The design of the invention is reasonable, the fault detection terminal can automatically detect the phase-to-phase short circuit fault of the high-voltage power cable and realize the alarm function through the fault alarm host, and the device can be installed in each group of cross interconnection sections to accurately determine the cable fault to a certain cross In the interconnection section, it provides a reliable basis for cable fault query, improves the efficiency of fault repair, greatly shortens the power outage time, and has the characteristics of fast, accurate, safe, and convenient.

Description

technical field [0001] The invention belongs to the field of power grids, in particular to a high-voltage power cable fault alarm device. Background technique [0002] At present, the operating environment of high-voltage power cables has become increasingly deteriorating with the increase of large-scale infrastructure construction. In addition, the application of construction techniques such as pipe pulling and direct burial has brought great safety hazards to the safe operation of high-voltage power cables. High-voltage power cables The failure rate is also on the rise. When a fault occurs in a high-voltage power cable with a voltage level of 110 kV and above, it takes a long time to inquire about the fault and locate the fault point, especially for a cable line with many cross-connection sections, where the fault occurs at the pipe pulling position below 5 meters underground , it is very difficult to find the fault point, resulting in too long cable fault query time, aff...

AI Technical Summary

Problems solved by technology

[0002] At present, the operating environment of high-voltage power cables has become increasingly deteriorating with the increase of large-scale infrastructure construction. In addition, the application of construction techniques such as pipe pulling and direct burial has brought great safety hazards to the safe operation of high-voltage power cables. High-voltage power cables The failure rate is also on the rise

When a fault occurs in a high-voltage power cable with a voltage level of 110 kV and above, it takes a long time to inquire about the fault and locate the fault point, especially for a cable line with many cross-connection sections, where the fault occurs at the pipe pulling position below 5 meters underground , it is very difficult to find the fault point, resulting in too long cable fault query time, affecting the efficiency of fault repair, resulting in too long a power outage

Although the fault addressing device can be used for fault detection on power lines of 35 kV and below, which uses the sudden change method of instantaneous impulse current to judge line faults, but this detection device is not suitable for all laid underground voltage levels of 110 kV and above. The high-voltage power cable can not realize the fault detection function

Images