GGD AC low-voltage distribution cabinet is high and low voltage distribution cabinet in one, is the development of a distribution cabinet earlier, as early as 1991, research began to GGD AC low-voltage distribution cabinet, has been on the market widespread use. While enabling developers to use relatively early, but the early awareness and understanding of its not comprehensive, and today we come back its in-depth understanding Here we were from GGD AC low-voltage distribution cabinet uses, use conditions and the structural characteristics of three re-discussed research. Usage GGD AC low-voltage power distribution equipment for power plants, substations, industrial enterprises and other power users of AC 50Hz, rated working voltage 380V, rated current up to 3150A power distribution system, as power, lighting and power distribution equipment power conversion, distribution and control purposes. GGD AC low with piezoelectric cabinet is based on the requirements of the Department of Energy in charge of the higher level, the majority of electricity users and design department, in a safe, economic, rational and reliable design principles of new low-voltage power distribution equipment. Products with high breaking capacity, dynamic thermal stability, electrical program flexible combination of convenience, family, practical, novel structure, high level of protection. Low-voltage switchgear as the replacement product. GGD AC low-voltage distribution cabinet meet IEC439 "Low-voltage switchgear and control equipment", GB7251 "Low-voltage switch equipment" and other standards. Conditions of Use 1, ambient air temperature does not exceed + 40oC, not less than -5oC, the average temperature within 24h not exceed + 35oC. 2, the indoor installation altitude place of use shall not exceed 2000M. 3, ambient air relative humidity at the highest temperature is + 40oC does not exceed 50% in the lower temperature allows a greater relative humidity. (For example, 90% at + 20oC) should take into account changes in temperature may occasionally produce condensation effects. 4, equipment installation and the vertical gradient of not more than 50%. 5, the device should be installed in my place severe vibration and shock, as well as inadequate electrical components are corrosion sites. 6, users have special requirements can be resolved through consultation with the manufacturer. Structural features 1, GGD AC low-voltage distribution cabinet cabinet in the form of universal cabinet, cold-formed steel frame with 8MF local welding assembled, the frame parts and special fittings supporting sentinel plants by the steel supplier to ensure cabinet accuracy and quality of the body. General principles of cabinet components by module design and module mounting hole 20, the common factor. Factory production can be realized. Only shorten the production cycle, but also improve work efficiency. 2, GGD cabinet designed to fully take into account the cabinet to run the heat. The upper and lower ends of the cabinet have a different number of cooling slots when the electrical components inside the heat, the heat does not rise, is discharged through the top slot, while the cold wind constantly added into the cabinet from the bottom of the slot, the sealing of the cabinet form a natural ventilation path from bottom to top, for cooling purposes. 3, GGD cabinet according to the modern industrial product design requirements, using methods designed golden ratio cabinet shape and size of each part of the split, so that the entire cabinet nice, new look.