SF6 Load Break Switch SF6 LBS 35KV VCB For RMU Panel

SF6 Load Break Switch SF6 LBS 35KV VCB For RMU Panel

Product Introduction

The SF6 load switch is a switchgear with a rated voltage of 12KV. It uses SF6 gas as the arc extinguishing and insulating medium. There are three positions for closing, opening and grounding inside the switch. It has small size, easy installation and use, and strong environmental adaptability.

Electrical characteristics

SF6 is a medium with high dielectric strength. Under a uniform electric field, the dielectric strength of SF6 is about 2,5~3 times that of air at the same pressure, and its dielectric strength is equivalent to that of transformer oil at 3 atmospheres. Practice has proved that mixing a small amount of sulfur hexafluoride gas in the air significantly increases the insulation strength of the air; on the contrary, adding a small amount of air to the sulfur hexafluoride gas will significantly reduce the insulation strength of the sulfur hexafluoride gas. Due to the high dielectric strength of SF6, for circuit breakers with the same voltage level and similar breaking current, the number of SF6 series fractures is less. For example, the LR-220 SF6 circuit breaker developed in my country has a single fracture voltage of 220KV. ; Another example is the 500KV oil-less circuit breaker with 6 to 8 fractures, while the SF6 circuit breaker has only 3 to 4 fractures. The corona onset voltage of SF6 is much higher than that of air, and the dielectric strength has nothing to do with the frequency of the applied voltage. However, attention should be paid to the uniformity of the electric field, impurities, the shape and irregularity of the electrode, etc., and the dielectric strength of SF6 The intensity has a certain intensity. The moisture in SF6 gas will affect the insulation. When the water content in SF6 exceeds a certain concentration, SF6 may decompose at a temperature above 200°C. The decomposition product contains hydrofluoric acid, which is a highly corrosive and highly toxic acid. In addition, moisture condensation is also harmful to edge insulation. Therefore, in SF6 electrical equipment, the moisture content should be strictly controlled.

Knkong Electric Co., Ltd (Zhengzhou Knkong Mechanical And Electrical Co., Ltd)was established in 2012. A wholly-owned subsidiary of Henan Sanhe Electric Group. We are mainly responsible for overseas market exporting, electronic components, and technology import.

Relying on a high-quality technical R&D team and continuous updating of product structure, the company's products have been classified into 10 categories, 30 varieties and more than 100 kinds of specifications from 35kV to low-voltage terminal electrical products. Product coverage: power transformers, indoor (outdoor) High-voltage vacuum circuit breakers, high and low voltage switchgear, integrated distribution boxes, energy metering boxes, power distribution terminals (DTU, FTU), fault indicators, cable branch boxes, smart power distribution systems, power automation equipment, and instrumentation. The company has first-class production equipment, advanced manufacturing technology, a strict production quality management system, sophisticated testing equipment and a perfect after-sales service system. A strong product application and technical support team can provide customers with the most comprehensive and secure product application and technical support.