Plateau type indoor high-voltage vacuum circuit breaker

Abstract

The invention discloses a plateau type indoor high-voltage vacuum circuit breaker. The top plate of a breaker shell is obliquely arranged at the upper edges of two side plates of the shell; embedded poles are arranged on the top plate of the shell; one end of a first contact arm is arranged at the upper wire outgoing end portions of the embedded poles, and the other end of the first contact arm isconnected with a first plum blossom contact; one end of a second contact arm is arranged at the lower wire outgoing end portions of the embedded poles, and the other end of the second contact arm isconnected with a second plum blossom contact; an arc extinguish chamber is arranged in the embedded poles, one end of an insulating pull rod is connected with a moving contact of the arc extinguish chamber, and the other end of the insulating pull rod is connected with the mechanism connecting rod through an insulating pull rod screw rod; the mechanism connecting rod is arranged on an operating mechanism main shaft through a three-phase crank arm; and a mechanism closing module and a mechanism opening module are both detachably arranged inside the shell. The circuit breaker can improve the insulating property, the process procedures of the shell and the operating mechanism can be simultaneously performed during production of products, and the production and manufacturing time is shortened.

Description

technical field [0001] The invention relates to the technical field of circuit breakers, in particular to a plateau type indoor high-voltage vacuum circuit breaker. Background technique [0002] Circuit breakers play a very important role in power systems. As protection and control units for power grid equipment and power equipment in industrial and mining enterprises, they are especially suitable for places where currents are frequently operated or short-circuit currents are broken many times. The distance between the solid-sealed poles of the existing conventional 40.5kV cabinet high-voltage vacuum circuit breaker is 300mm, and the distance between the upper contact arm and the lower contact arm of the solid-sealed pole is 400mm, which can meet the altitude of 1000 meters and below. [0003] When the altitude increases, as the air pressure decreases and the temperature difference between day and night increases, the insulation of the product begins to decline. The high-vol...

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Problems solved by technology

[0003] When the altitude increases, as the air pressure decreases and the temperature difference between day and night increases, the insulation of the product begins to decline. The high-voltage vacuum circuit breaker with switchgear cabinet operates in a plateau environment for a long time, and it will appear due to changes in air pressure, temperature, and humidity factors in the plateau area. Incoherent discharge phenomenon, unable to run stably

At present, users in plateau areas in China, such as Tibet, Qinghai, Xinjiang and other engineering projects, have power infrastructure construction altitudes above 4,000 meters, and the insulation level of the above-mentioned high-voltage vacuum circuit breakers cannot meet the normal use of distribution networks.

On this basis, some manufacturers have increased the distance between the embedded poles of ordinary high-voltage vacuum circuit breakers, the distance between the upper contact arm and the lower contact arm of the embedded pole, and the distance between the lower contact arm of the embedded pole and the sheet metal shell of the vacuum circuit breaker. Body distance, a total of three dimensions make the high-voltage vacuum circuit breaker suitable for areas with an altitude of 2500 meters to 3500 meters, but these technologies are still difficult to apply the high-voltage vacuum circuit breaker to an altitude of more than 4000 meters

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