HEI-12/630-20 environmentally friendly gas-insulated AC gold-enclosed switchgear is a high-quality product provided by our company for my country's power distribution network based on our years of experience in field service and design and construction of power distribution networks. This equipment digests and absorbs advanced technologies and design concepts at home and abroad, and is an environmentally friendly dry air insulated nitrogen switchgear developed for the vast number of urban and rural power grid users in my country. It has excellent performances such as reasonable design, reliable power supply, compact structure, easy installation, flexible operation, small size, and high cost performance.