35KV multi-gap anti-thunder insulator

Abstract

The present invention provides a 35KV multi-gap anti-thunder insulator. A ceramic coat is internally provided with a valve block cavity and an electrode cavity, the valve block cavity is internally provided with a zinc oxide valve block, the electrode cavity is internally provided with discharging electrodes, the distance between two adjacent discharging electrodes is 10-15mm, the ceramic coat is provided with a discharging hole communicated with the electrode cavity, the intensity of the ceramic coat is high and can directly support an overhead conductor so as to ensure the insulation level of the line; the arrangement of the zinc oxide valve block avoids the lightning-caused breaking and the trip accident of the overhead conductor; and the arrangement of the discharging electrode and the discharging hole allows the arc blowout capacity to be high when the lightning stroke exceeds the voltage and allows the discharge current capacity to be larger than a common arrester. Compared to the prior art, the daily operation maintenance cost is low with no need for separation installation of the insulator and a lightning arrester; and the axis of the discharging hole is perpendicular to the axis of the electrode cavity, the diameter of the discharging hole is not less than the thickness of the discharging electrode, and the discharging hole has a good discharging performance so as to greatly optimize the lightning protection performance of the anti-thunder insulator.

Description

technical field [0001] The invention relates to power grid accessories, in particular to a 35kV lightning protection insulator with multiple gaps. Background technique [0002] The lightning overvoltage amplitude of the 35kV overhead distribution line is high and the discharge time is short, while the insulation level of the 35kV distribution line is low. The lightning overvoltage can cause the insulator to flashover, and form a power frequency continuous current on the lightning flashover channel, causing the line Fault. In the prior art, the lightning protection measures for 35kV overhead lines mainly adopt parallel lightning arresters on the side of the line insulator, arc angles or lightning protection devices with air gaps for lightning protection. This lightning protection method causes complex installation structures on site and is difficult to transform , The cost of manpower and material resources invested is high. Contents of the invention [0003] The inventio...

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