As a circuit breaker, sulfur hexafluoride is widely used in the field of electric power and is one of the indispensable equipment. Today, compared with traditional circuit breakers, high-purity sulfur hexafluoride circuit breakers have the following significant advantages.

1. High purity sulfur hexafluoride can give full play to the arc blowing effect of gas flow. The arc extinguishing chamber has small volume, simple structure, large breaking current, short arcing time, no reignition or reignition of breaking capacitive or inductive current, and low over-voltage.

2. Long electrical life. Under 50kA full capacity, the high-purity sulfur hexafluoride can be continuously broken for 19 times, and the cumulative breaking current can reach 4200kA, which is suitable for frequent operation.

3. High insulation level. The high-purity sulfur hexafluoride gas has passed various insulation tests at 0.3MPa and has a large margin. After the accumulated breaking current is 3000kA, each fracture can withstand the power frequency voltage of 250kV up to 1? At 0.3MPa? Min, reduce sulfur hexafluoride gas to zero gauge pressure and still withstand power frequency voltage of 166.4kV for 5min.?

4. Good sealing performance. The water content of sulfur hexafluoride gas is low. The arc extinguishing chamber, resistance and pillar are divided into independent gas compartments, which do not need to be opened during on-site installation. After installation, they are connected with automatic connectors. The installation and maintenance are convenient, and dirt and water can be prevented from entering the circuit breaker.

5. Self protection and monitoring system is complete. The signal cylinder in the circuit breaker can protect the circuit breaker itself, the density relay can monitor the leakage of sulfur hexafluoride gas at Liming, and the pressure switch and safety valve can monitor the pressure of the hydraulic mechanism to protect the safety of the hydraulic system. In addition, the hydraulic mechanism is also equipped with a "preventable" hydraulic system? The valve system of "pressure loss slow opening" can be locked on the body to ensure safe operation.

The content of the article comes from sulfur hexafluoride: http://www.feiliergas.com