Inflation switch device with temperature rise current exceeding 4000 A

Abstract

The invention discloses an air inflation switch device with temperature rise current exceeding 4000 A. The air inflation switch device comprises a front cabinet, a middle cabinet, a rear cabinet and an air box, a first air inlet is formed in the top of the front cabinet, a second air inlet is formed in a rear end plate of the rear cabinet, and height differences exist between two side plates of the front cabinet, the middle cabinet and the rear cabinet and two side plates of the air box to form concave parts. Heat dissipation plates are arranged on two side plates and a top plate of the air box, a first opening is formed in the front side face of the concave portion, a first fan is installed on the rear side face of the concave portion, and an air outlet is formed in the position, higher than the top plate of the air box, of the front end plate of the rear cabinet and provided with a second fan. A cover plate for sealing the concave part is mounted at the edge of the concave part, so that a heat dissipation channel is formed in a space between the gas tank side plate and the cover plate; and a space above the gas tank top plate and between the front cabinet and the rear cabinet is an open space. According to the invention, the heat dissipation effect is improved, the safe and stable operation is still realized when the temperature rise current exceeds 4000 A, the service life is prolonged, the maintenance is convenient, and the device can be formed by transforming the existing gas-filled switch equipment, and is economical.

Description

technical field [0001] The invention relates to a gas-filled switch device, in particular to a gas-filled switch device with a temperature rise current exceeding 4000A. Background technique [0002] The series gas-insulated metal-enclosed switchgear (C-GIS) belongs to the power distribution equipment in the medium voltage field. It is welded, and the primary flow part is encapsulated in a closed air chamber. The relative air pressure inside the air chamber is 0.02 to 0.05 MPa. The gas is generally pure SF6 gas, compressed air, compressed N2, compressed CO2, CF4, C-C4F8, C3F8, C2F6, CF3I, and mixtures of SF6 and the above gases. [0003] The series of gas-insulated metal-enclosed switchgears are suitable for receiving and distributing electric energy in 7.2~40.5kV power transmission and distribution systems, realizing real-time control, protection, measurement, monitoring, communication and other functions of the power system under normal operation and fault conditions. It ...

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Problems solved by technology

Practice has proved that the problem of temperature rise seriously affects the stability and service life of the switchgear. Moreover, the problem of overheating is a continuous development process. If it is not controlled, the degree of overheating will continue to increase, and it will affect the performance of insulating parts and equipment life. Firstly, it will reduce the insulation of the insulating parts. Secondly, due to the large temperature change, the components in the cabinet will have different degrees of expansion. Unsynchronized expansion will cause cracking and deformation of components, or cause air chambers Leakage, etc., resulting in more serious consequences

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