Pressure relief device capable of conforming to requirements of temperature rise and internal fault pressure relief of switch cabinet

Abstract

The invention relates to a pressure relief device. The pressure relief device is a rectangular basin, wherein the rectangular basin is provided with flanging edges arranged in the same plane, the basin bottom has two layers, a plurality of long rectangular through holes are formed in an inner side of a through hole, for fastening, of a long flanging edge, are arranged in a straight line and are parallel to the long flanging edge, the pressure relief device is connected onto an outlet of a pressure relief passage on a switch cabinet, the through hole, for fastening, formed with the long rectangular through holes is matched with a metal bolt, the through hole, for fastening, in the other long flanging edge is matched with a nylon bolt, and through holes are formed in a mesh plate and conform to IP4X protection grade requirement. By the pressure relief device, heat can be timely and effectively dissipated; meanwhile, the positions where the long rectangular through holes are located are bent under the impact of fault pressure, the pressure relief device is opened to one side connected with the metal bolt, the fault pressure is finally relieved, thus, the pressure relief device cannot be rushed to fly, and the requirements of temperature reduction and fault pressure relief of the switch cabinet can be met; and the pressure relief device is simple in structure and high in practicability.

Description

technical field [0001] The invention relates to a pressure relief device for a switch cabinet, which is suitable for indoor AC switch cabinets with a rated voltage of 3.6kV-40.5kV in a power system. Background technique [0002] According to the requirements of the national standard GB 3906-2006, 3.6kV-40.5kV switchgear must meet the type test requirements, among which the 1.1 times rated current temperature rise test and internal fault test are very harsh on the switchgear assessment. The 1.1 times rated current temperature rise test mainly assesses the ventilation and heat dissipation capabilities of the switchgear, and requires the switchgear enclosure to meet the IP4X protection level; the internal fault test mainly assesses the enclosure strength of the switchgear and the timeliness of pressure relief through the pressure release channel. Exceeding the temperature rise will directly affect the normal use of the switchgear. If it exceeds the limit that the switchgear can...

AI Technical Summary

Problems solved by technology

Exceeding the temperature rise will directly affect the normal use of the switchgear. If it exceeds the limit that the switchgear can withstand, unpredictable failures will occur (such as short circuits and other extreme conditions); when an internal failure occurs, it cannot be effectively prevented during the pressure relief process. The splash of particles, as well as arc light and high-temperature gas will also spray out of the cabinet in no direction, which will affect the life safety of maintenance personnel

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