Discharge gap device

Abstract

The invention discloses a discharge gap device for preventing surface flashover of an insulator, which can solve the problem that the surface flashover of the insulator is cuased under the overvoltage to burn the insulator. The technical scheme of the invention is as follows: the discharge gap device comprises a high voltage arc initiating ring, an arcing horn, a pressing plate and a fastening piece; the high voltage arc initiating ring is arranged at a high voltage end of the insulator; a fixing plate and the pressing plate are arranged at a low voltage end of the insulator; and the arcing horn is connected with the fixing plate by the fastening piece, and the other end of the arcing horn bends downwards to form a discharge gap with the high voltage arc initiating ring. The discharge gap device not only can be directly fixed on fittings of two ends of a composite insulator, but also can be fixed on a cross yoke plate by installing holes to be connected with a ceramic insulator. The invention provides the novel discharge gap device adaptive to the composite insulator and the ceramic insulator and having rapidness in installation, adjustable gap, stable discharge voltage and good arc resistance and arc quenching performance.

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 for preventing flashover on the surface of an insulator, which can solve the problem of burning the insulator due to flashover on the surface of the insulator under overvoltage. 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 and the arc extinguishing ability is poor. If the circumference of the uniform ring is small, the arc will easily burn the insulator. If the circumference is large,...

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.

And the traditional arc starting angle or uniform ring cannot meet the installation requirements applicable to porcelain insulators and composite insulators at the same time

Images