Sealed electrical cabinet for dust environment

The utility model relates to the technical field of power equipment, in particular to a sealed electrical cabinet for a dust environment, which comprises a cabinet body with internal air pressure larger than external air pressure, a filter screen and a dustproof air inlet are arranged on the cabinet body, the filter screen is communicated with the inside and the outside, and the dustproof air inlet is communicated with a compressed dry air source through an air inlet pipeline. A valve is arranged in the middle section of the air inlet pipeline, two dust concentration detection devices are arranged in the cabinet body and connected with a monitoring system, the monitoring system receives output data of the dust concentration detection devices and adds the output data to obtain an average value, and the filter screen comprises a vertically-arranged rectangular outer frame. A grid layer, an activated carbon layer and an asbestosed wire gauze layer are sequentially arranged on the inner periphery of the rectangul