A high-voltage AC three-phase explosion-proof combined overvoltage protector

Abstract

The invention discloses a high-voltage AC three-phase explosion-proof combined overvoltage protector comprising three phase polar poles which are identical in shape, specification and mechanical and electrical parameters. An insulated bottom case and an insulated installing baseplate which are integrated in structure through mould pressing of ABS synthetic resin are arranged below the phase polar poles. Any one side surface of the insulated bottom case is equipped with a grounding screw rod and a pressure relief device which is used for releasing thermal capacity generated by limiting lightning or overvoltage of various types of operation. The insulated bottom case is also internally provided with ground polar poles. A pressure relief pipeline is arranged between the ground polar poles and the phase polar poles. The phase polar poles and the ground polar poles are electrically connected by the pressure relief pipeline and a pressure relief channel is formed. With application of the design, loss to an electric power system and users caused by the fact that impact thermal capacity cannot be released and is liable to explode due to lightning and overvoltage of various types of operation can be solved, and the protector acts on the electric power system and can protect interphase lightning impact and overvoltage and can also protect lightning and overvoltage relative to the ground without leakage current in normal working so that the protector is small in size, long in the service life and easy to popularize and use.

Description

technical field [0001] The invention belongs to the technical field of overvoltage protection for transformation and distribution networks, and specifically relates to an overvoltage protector for protecting power equipment from various overvoltage damages such as lightning, atmosphere, and operation. Background technique [0002] With the rapid development of the national economy, the safety of power production and application is particularly important, but in real life, the climate is changeable, lightning activities are frequent, and the frequency of switching electrical appliances by various users is frequent, which inevitably affects the power system. There will be an overvoltage shock. At present, many domestic manufacturers are also producing single surge arresters or combined overvoltage protectors, but there are many potential safety hazards. When various types of overvoltage impact, because the internal zinc oxide or other voltage limiting components absorb a larg...

AI Technical Summary

Problems solved by technology

At present, many domestic manufacturers are also producing single surge arresters or combined overvoltage protectors, but there are many potential safety hazards. When various types of overvoltage impact, because the internal zinc oxide or other voltage limiting components absorb a large amount of energy and cannot be discharged, it will cause an explosion and expand the accident. On the contrary, the impact on the power system is greater. Facts have also proved that this type of equipment is in The probability of explosion during use is quite high, and such accidents often occur on site; in addition, if a single arrester cannot effectively protect the phase-to-phase overvoltage in the power system

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