A discharge gap device with pressure equalizing ring

Abstract

The invention relates to an insulator protection device and belongs to the field of electric protection in an electric power grid, and particularly, relates to a discharge gap device with voltage-equalizing rings. The discharge gap device can prevent flashover on the surface of an insulator. With the discharge gap device adopted, the problem of corona produced by a composite insulator under overvoltage and the problem of the burning of the insulator caused by the flashover on the surface of the insulator can be solved. High-voltage arc-striking rings and voltage-equalizing arcing horns which are in longitudinal symmetry are connected on fittings at two ends of a composite insulator, such that the discharge gap device can be formed. The discharge gap device of the invention is directly fixed on the fittings at the two ends of the composite insulator and is suitable for composite insulators; and the discharge gap device is a novel discharge gap device which is advantageous in quick installation, voltage-equalizing and anti-corona properties, stable discharge voltage, excellent arc-resistant arc-distinguishing performances and long service life.

Description

technical field [0001] The invention relates to an insulator protection device, which belongs to the field of electrical protection in power networks, in particular to a discharge gap device with a voltage equalizing ring, which is a discharge gap device that prevents flashover on the surface of an insulator, and can not only solve the problem of recombination under overvoltage The corona generated by the insulator can also solve the problem of burning the insulator due to flashover on the surface of the composite insulator. Background technique [0002] In order to improve the safety of the transmission line, reduce the flashover that occurs along the insulating surface during overvoltage, and the burn of the insulator surface caused by the flashover causes the insulation performance to decline, a voltage equalizing ring or an arc striking angle is often set at both ends of the insulator, and the arc striking angle is The cost is low, but the discharge voltage is unstable a...

AI Technical Summary

Problems solved by technology

[0002] In order to improve the safety of the transmission line, reduce the flashover that occurs along the insulating surface during overvoltage, and the burn of the insulator surface caused by the flashover causes the insulation performance to decline, a voltage equalizing ring or an arc striking angle is often set at both ends of the insulator, and the arc striking angle is The cost is low, but the discharge voltage is unstable and the arc extinguishing ability is poor. If the circumference of the uniform ring is small, the discharge is easy to burn the insulator. If the circumference is large, the cost is high, and the dry arc distance between phases will be reduced if the circumference is too large.

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