A withdrawable switch cabinet

Abstract

The invention relates to the field of electrical equipment, and discloses a draw-out switch cabinet. The front cabinet opening of the cabinet body is used to put the corresponding drawer cabinet, and the cabinet openings of the cabinet body are connected to each other, and each cabinet opening is placed behind the corresponding drawer cabinet. Between the back panel of the cabinet body and the back panel of the drawer cabinet, a channel connecting each cabinet opening is formed; the top surface, back and side of the cabinet body are all sealed structures; the drawer cabinet at the bottom of the cabinet body is a pressure relief drawer cabinet; A dry powder fire extinguishing device filled with carbon dioxide gas and fire extinguishing dry powder is provided on the inner side of the backboard of the cabinet, and the body of the dry powder fire extinguishing device is sealed by hot melt adhesive. When a short-circuit accident occurs in the withdrawable switchgear, the temperature and pressure of the gas in the switchgear will rise, and the pressure relief drawer will slide out of the cabinet under the action of high temperature and high pressure gas, and the cabinet mouth will be opened to form a pressure relief channel. , The high-temperature and high-pressure gas accumulated due to a short-circuit accident will be quickly discharged to avoid deformation or even bursting.

Description

technical field [0001] The invention relates to the field of electrical equipment, in particular to a withdrawable switch cabinet. Background technique [0002] Switchgear is a kind of electrical equipment, its main function is to open and close, control and protect electrical equipment in the process of power generation, transmission, distribution and power conversion in the power system. The components in the switch cabinet are mainly composed of circuit breakers, isolating switches, load switches, operating mechanisms, transformers and various protection devices. There are many classification methods for switchgear. For example, the circuit breaker installation method can be divided into removable switchgear and fixed switchgear; or according to different cabinet structures, it can be divided into open switchgear, metal-enclosed switchgear, and metal switchgear. Closed armored switchgear; according to different voltage levels, it can be divided into high-voltage switchge...

AI Technical Summary

Problems solved by technology

However, this traditional pressure relief device is affected by the size of the cover plate. Due to the small pressure relief channel, the high temperature and high pressure gas cannot be discharged in time, causing the switchgear to deform or even explode; in addition, during the process of melting the nylon screw , the high-temperature and high-pressure gas in the switch cabinet further accumulates, and the nylon screws have not completely melted, but the switch cabinet can no longer withstand the pressure of the high-temperature and high-pressure gas inside and explodes

In addition, due to the need to ensure that the cover plate can effectively relieve pressure, it is impossible to install sealing measures at the frame of the cover plate, which makes it easier for dust to enter the high-voltage compartment and contaminate the high-voltage conductors, especially when it is used outdoors, rainwater will directly invade the inside of the switchgear , affecting the internal insulation strength and increasing the short-circuit fault

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