Infrared temperature measurement windows are optical windows that allow the passage of infrared, ultraviolet, and visible light, installed on the casing of electrical cabinets. They are primarily used for internal temperature measurement in various high-voltage switch cabinets, metal-clad cabinets, urban ring cabinets, and GIS high-voltage equipment. By utilizing infrared thermal imagers and thermometers, widely used in the power system, in conjunction with the "Infrared Guidelines," they enable the identification of overheating faults. Through the infrared temperature measurement windows, various non-destructive inspections of the equipment inside the cabinet can be conveniently performed, allowing for the timely and effective detection of potential high-voltage accidents and preventing incidents from occurring.