Lightning prevention support column insulator

Abstract

The invention relates to a power distribution device of a power system, in particular to a lightning protection support column insulator. The insulator is provided with a core rod, and two ends of thecore rod are respectively provided with an electrode and a wiring device. The insulator comprises a positioning device cooperating with the core rod, and the positioning device can rotate relative tothe core rod. The positioning device is connected with an arc starting rod. The insulator can adjust the angle between an arc starting body and an installation conductor, can guarantee that the safety distance between a spherical head of the arc starting rod and other metals or conductors is greater than a discharge interval distance of an insulating arc starting body.

Description

technical field [0001] The invention relates to power distribution equipment in a power system, in particular to a lightning protection post insulator. Background technique [0002] Lightning protection post insulators in the prior art, such as figure 1 As shown, the distance a between the ball head of the insulating arc striking rod and the mounting bracket is smaller than the distance c of the discharge gap. When there is a lightning flashover near the line tower, the lightning pulse voltage on the line first breaks through the shortest air gap distance a, resulting in high-voltage arc striking Due to factors such as the small gap distance and the unevenness of the gap, it is difficult to extinguish the arc in time, forming a ground fault and increasing the tripping rate of the line; even in wet or heavy rain weather, a loop is formed at the gap distance a, and the line Single-phase grounding trips, unable to provide normal power supply, and affects the normal production ...

AI Technical Summary

Problems solved by technology

[0002] Lightning protection post insulators in the prior art, such as figure 1 As shown, the distance a between the ball head of the insulating arc striking rod and the mounting bracket is smaller than the distance c of the discharge gap. When there is a lightning flashover near the line tower, the lightning pulse voltage on the line first breaks through the shortest air gap distance a, resulting in high-voltage arc striking Due to factors such as the small gap distance and the unevenness of the gap, it is difficult to extinguish the arc in time, forming a ground fault and increasing the tripping rate of the line; even in wet or heavy rain weather, a loop is formed at the gap distance a, and the line Single-phase grounding trips, unable to provide normal power supply, and affects the normal production and life of residents; if the tower still has a cable, the power frequency continuous current will also form a grounding loop along the cable, raising the potential near the cable entry site, and causing pedestrians passing by the cable. Security poses hidden dangers

In addition, there is another situation: due to the limitation of the line space corridor, sometimes multiple circuits are erected on the same base tower, especially if the equipment tower is installed, there are many jumper lines on the pole, and the existing lightning protection post insulator arc strike rod The orientation is fixed, and it is difficult to ensure the electrical safety distance between the lightning protection post insulator arc striker and other equipment or lines, which affects the safe operation of the line

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