Voltage-dividing insulation cap for DC leakage current test of controllable lightning arrester

Abstract

The invention discloses a voltage-dividing insulation cap for a DC leakage current test of a controllable lightning arrester. The voltage-dividing insulation cap comprises a voltage-dividing insulation cap body and an inflation chamber located in the voltage-dividing insulation cap body. The bottom of the voltage-dividing insulation cap body is provided with a groove, and the top of the voltage-dividing insulation cap body is a tower-shaped tip. The voltage-dividing insulation cap body comprises an insulation cap top and an insulation cap side part fixedly connected to the lower part of the insulation cap top, and the insulation cap top and the insulation cap side part are integrally formed and manufactured by adopting a silicon rubber material; and the outer sides of the insulating cap top and the insulating cap side parts are folded corrugated surfaces. The voltage dividing insulation cap bears voltage, and the borne voltage value is reduced compared with that of an existing controllable lightning arrester in a test; SF6 gas is high in insulation safety and more resistant to high voltage; and the voltage-dividing insulating cap can play a role in increasing the insulating strength and adjusting the insulating cooperation, and the leakage current test of the controllable lightning arrester can be completed without dismounting the controllable switch.

Description

technical field [0001] The invention relates to a voltage-dividing insulating cap for a DC leakage current test of a controllable arrester, which belongs to the technical field of arrester tests. Background technique [0002] The arrester is connected between the cable and the earth, usually in parallel with the protected equipment. The lightning arrester can effectively protect the communication equipment. Once abnormal voltage occurs, the lightning arrester will act and play a protective role. When the communication cable or equipment is running under the normal working voltage, the arrester will not work, and it will be regarded as an open circuit to the ground. Once a high voltage appears and endangers the insulation of the protected equipment, the arrester will act immediately to direct the high voltage surge current to the ground, thereby limiting the voltage amplitude and protecting the communication cables and equipment insulation. When the overvoltage disappears, ...

AI Technical Summary

Problems solved by technology

This high voltage will be applied to both ends of the control switch at the same time, and the fracture of the switch cannot withstand high voltage

Therefore, it is necessary to remove the connecting wire between the arrester and the control switch during the test, but after removing the connecting wire, the insulation distance between the two is small and still cannot withstand high voltage

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