Since the 1950s, medium-voltage switchgear has evolved through stages of open-type, box-type, and metal-enclosed designs, and now faces no issues in meeting the functional requirements of equipment. The products have long been serialized and cover a comprehensive range of applications. The rapid development of compact, maintenance-free, highly modular, safe, and reliable environmentally friendly gas-insulated ring main units enables remote monitoring, control, and management of the distribution network of power systems, fulfilling the needs of grid optimization, electrical safety, power management, and energy conservation. The system is also widely applicable in intelligent power distribution areas such as transportation, factories, hospitals, schools, buildings, residential communities, and commercial office buildings.

Sulfur hexafluoride gas, owing to its excellent insulation and arc-extinguishing properties, is widely utilized in high-voltage electrical equipment. Globally, 50% of the produced sulfur hexafluoride is used in the power industry, with 80% of it being employed in high-voltage switchgear. In China, over 90% of the fully sealed ring main units in operation rely on sulfur hexafluoride gas as the insulating medium.

The LPHB7-12 environmentally friendly gas-insulated AC metal-enclosed switchgear is a new green and eco-friendly switchgear, characterized by its compact size, high modularity, multifunctional combination, high reliability, compact structure, and maintenance-free features. It is primarily used in distribution stations and box-type substations at load centers such as urban residential communities, high-rise buildings, large public buildings, and industrial enterprises, providing control, protection, and monitoring of electrical energy for the supplied areas.

The LPC-12 series fully insulated and enclosed ring main switchgear is a metal-enclosed switchgear insulated with SF6 gas. This equipment can be composed of modules such as load switch units, load switch-fuse combination units, vacuum circuit breaker units, and bus incoming line units. It employs a series of technologies and materials, offering excellent electrical and mechanical performance, minimal impact from environmental and climatic conditions, compact size, easy installation, convenient operation, maintenance-free, and flexible combination options. The clear and intuitive design ensures simple and straightforward operation. With a large feeder connection capacity, it is suitable for various wiring systems.

The XGN66-12 fixed-type enclosed switchgear (hereinafter referred to as the switchgear) is our company's high-voltage electrical equipment product, compliant with the national standard GB3906 "AC Metal-enclosed Switchgear for 3-35kV" and the Ministry of Electric Power's DL/T404 "Technical Conditions for Ordering Indoor AC High-voltage Switchgear," and also meets the standard 60298 "AC Metal-enclosed Switchgear and Controlgear for Voltages above 1kV and up to 52kV."

The XGN15-12(SF6) unitized AC metal-enclosed ring main switchgear (hereinafter referred to as the ring main unit) is a high-voltage electrical product independently designed and developed by us, based on the introduction of foreign technology and in accordance with the requirements of domestic rural power and urban network transformation. All technical performance indicators fully comply with the IEC 62271-200:2003 and GB3906 standards.

The HXGN17-12 box-type fixed metal-enclosed switchgear (referred to as the ring main unit) is an AC high-voltage electrical installation with a rated voltage of 12kV and a rated frequency of 50Hz, primarily used in three-phase AC ring main terminal distribution networks and industrial power equipment for receiving and distributing electrical energy. It is also suitable for installation in box-type substations.

This intelligent solid insulated switchgear features a simple structure, flexible operation, reliable interlocking, and convenient installation, providing satisfactory technical solutions for various application scenarios and different users. The adoption of sensing technology, automatic control technology, and information technology, along with superior technical performance and easy, flexible assembly solutions, can meet the ever-changing market demands and is suitable for the intelligent requirements of power grids.

The XGN15-12 unitized AC metal-enclosed ring main switchgear (hereinafter referred to as the ring main unit) is a high-voltage electrical product independently designed and developed by us, based on the introduction of foreign technology and in accordance with the requirements of domestic rural power and urban network transformation. All technical performance indicators fully comply with the IEC 62271-200:2003 and GB3906 standards. The main switch, operating mechanism, and components of the ring main unit use original equipment from the company or domestically assembled SFL-12/24 type switchgear, and can also be equipped with the company's original HAD/US type SF6 circuit breaker or VD4-S type vacuum circuit breaker according to user needs. Its operation mode is divided into manual and electric types.

The XGN12-12 series solid fully insulated enclosed ring main switchgear is a maintenance-free, fully insulated, and sealed solid insulated vacuum switchgear. The high-voltage live parts are molded with epoxy resin material with excellent insulation properties, integrating the vacuum interrupter, main conductive circuit, and insulation support into a single unit. Functional units are connected through fully insulated solid busbars. Consequently, the entire switchgear is unaffected by external environmental conditions, ensuring the reliability of equipment operation and the safety of operating personnel.