Summary

Sulfur hexafluoride gas, owing to its superior insulation and arc-quenching properties, is widely used in high-voltage electrical equipment. Globally, 50% of the sulfur hexafluoride gas produced is utilized in the power industry, with 80% of it used in high-voltage switchgear. In China, over 90% of fully sealed loop network cabinets in operation rely on sulfur hexafluoride gas as the insulating medium.

However, the inevitable leakage of this gas during inflation, operation and recovery leads to emission, which is an important source of air pollution and seriously damages the living environment of human beings. The Kyoto Protocol clearly stipulates that SF6 gas is one of the six greenhouse gases.

In 1998, China promulgated and implemented the National Hazardous Waste List, which has listed SF6 gas as hazardous waste.

SF6 The global warming coefficient of gas molecules is 24,000 to 26,000 times that of CO₂. According to statistics, the power distribution system consumes more than 4,500 tons of SF6 gas every year, which is equivalent to 120 million tons of CO₂ emissions.

SF6 The life span of gas molecules in the atmosphere is 3400 years, and its impact on human living environment reaches hundreds of generations, far exceeding the adverse impact of CO₂ gas. In recent years, the concentration of SF6 gas in the atmosphere has been rising steadily, especially in the Northern Hemisphere, which has attracted more and more attention from the international community.

Therefore, it has become the consensus of people with insight in the production and use of high pressure switches to use less or no SF6 gas and vigorously promote new technologies and alternative products.

The exposed surfaces of the insulators of the main components can be coated with a semiconductor shielding layer as required, grounding them to eliminate static induction. This significantly enhances safety. The operating mechanism of the high-voltage circuit breaker uses either a spring or permanent magnet mechanism, with a mechanical life of 10,000 cycles. All operational data and equipment status can be remotely monitored, allowing for unattended operation, making it a highly efficient distribution device.

This intelligent system features a simple structure, flexible operation, reliable interlocking, and easy installation. It offers satisfactory technical solutions for various applications and users. By integrating sensor technology, automatic control technology, and information technology, along with advanced technical performance and a simple, flexible assembly solution, it can meet the evolving market demands and is well-suited for the requirements of smart grids.

The ring network cabinet is suitable for 50Hz, 12 kV power system, widely used in industrial and civil cable ring network and distribution network terminal engineering.

As the use of electric energy reception and distribution, especially suitable for urban residential areas power distribution, small secondary substations, switch stations, cable branch boxes, box-type substations, industrial and mining enterprises, shopping malls, airports, subways, wind power generation, hospitals, stadiums, railways, tunnels and other places.

Because of the advantages of full insulation, full sealing and full shielding, this product is especially suitable for use in harsh environments such as high altitude, high temperature, hot and humid, severe cold and serious pollution.

 Function and features

environmental protection

All the materials selected in the manufacturing of products are non-toxic and harmless substances, and no toxic and harmful substances will be discharged during use. The materials can be recycled after the life cycle, which determines the environmental protection used.

The fully insulated, sealed, and shielded epoxy resin switch body and fuse body are made from epoxy resin, which has excellent electrical, mechanical, and thermal properties. Epoxy resin has been widely used in electrical equipment for a long time, achieving excellent performance. The switch body and fuse body are formed using the epoxy resin APG process. The insulating body is a critical component of solid insulation switches, serving both as an insulator and a load-bearing component. It must meet technical requirements such as heat resistance, weather resistance, crack resistance, high mechanical strength, and good insulation strength. The switch body is large in volume, with many embedded parts and various shapes, making its manufacturing challenging. Our company has extensive experience in designing and manufacturing insulators, ensuring high-quality batch production through meticulous design of the cylinder, material formulation, and process flow. Based on customer requirements, we can provide a cylinder with external shielding and groundingOur company follows the principle of using less or no SF6 gas. On the basis of system research, learning and drawing lessons from similar foreign products, we independently developed XGN-12 type solid insulation ring network cabinet.

The use of shielding measures on the touchable parts prevents electric shock accidents, enhancing safety. A comprehensive interlocking system ensures clear visibility of the three-phase isolation breaks, preventing misoperation accidents. The complete elimination of SF6 gas usage avoids the decrease in insulation and arc-quenching capabilities due to insufficient gas pressure, which could lead to explosions in SF6 loop network cabinets. The interphase isolation structure is reinforced to prevent phase-to-phase or multi-circuit short circuits that could cause or exacerbate explosions. An explosion-proof vacuum interrupter is used, with the switch sleeve providing additional protection for the switch. In load switch-fuse combination electrical equipment, the auxiliary grounding switch uses a vacuum switch tube sealed within the fuse body.

safety ：

The use of shielding measures on the touchable parts has eliminated the risk of electric shock, enhancing safety. A comprehensive interlocking system ensures clear visibility of the three-phase isolation breaks, preventing misoperation accidents. The complete elimination of SF6 gas usage prevents SF6 ring main units from experiencing a decrease in insulation and arc-quenching capabilities due to insufficient gas pressure, which could lead to explosions. The interphase isolation structure is reinforced to prevent phase-to-phase or multi-circuit short circuits that could cause or exacerbate explosions. An explosion-proof vacuum interrupter is used, with the switch sleeve providing additional protection for the switch. In load switch-fuse combination electrical equipment, the auxiliary grounding switch uses a vacuum switch tube sealed within the fuse body.

Easy to operate:

The isolating switch grounding switch has only one operating handle, eliminating the need for identification and reducing the risk of errors. When the circuit breaker is in operation, the operating handle of the isolating switch grounding switch cannot be operated. The operating procedure is straightforward, making it easy for anyone with basic electrical knowledge to operate, thus avoiding the need for complex technical training. This simplifies the operation process and prevents operational errors. Intelligent:

The switch cabinet has intelligent interface and sensor installation position, which can meet the requirements of smart grid after being equipped with intelligent equipment.

Multiple operating mechanisms:

The switch can be equipped with spring and permanent magnet two kinds of operating mechanism, so that users can choose.

 Service condition

◆ Ambient temperature: -45℃~+45℃

◆ Humidity: maximum average relative humidity, daily average less than or equal to 95%, monthly average less than or equal to 90%

◆ Altitude: less than 4000 meters

◆ Seismic resistance: 8 degrees

◆ Protection level: live body sealed IP67, fuse cylinder IP67, switch cabinet shell IP3X