2019-12-19

According to the ideal gas,equation of state pv=nRT It can be seen that the pressure p is a linear relationship of temperature. As shown in the figure below, when the gas temperature in the sulfur hexafluoride equipment changes, the value of the pressure gauge changes with it, and it is not ready to show the state of the equipment.

2019-11-13

1, sulfur hexafluoride can only remain gaseous when the temperature is above 45 ° C, and it has the possibility of liquefaction under normal conditions of use, so sulfur hexafluoride can not be used at too low temperature and too low pressure. The actual pressure of circuit breaker decreases after sulfur hexafluoride liquefaction, and the switch cannot work normally due to insufficient insulation distance.

2019-09-22

Contact with SF6 should be carried out in a well-ventilated environment, and the person should stand upwind when handling and using sulfur hexafluoride gas. 1) SF6 gas new gas quality should meet the standard requirements. 2) SF6 gas in high voltage electric due to the role of high temperature arc will decompose and produce some low fluorine compounds, when there is water and oxygen in the equipment will further react, resulting in a variety of derived products. Most of these products have

2019-09-22

As a widely used insulating medium, SF6 gas also has some problems in its use. SF6, as an insulating medium, is closely related to the humidity of the gas, that is, the moisture content. Under the action of arc corona, SF6 can chemically react with water to produce strong corrosive substances HF and highly toxic fluoride, endangering the safety of equipment and personnel, and may cause explosion accidents in serious cases. When the humidity of SF6 gas in the equipment is too high, and the water

2019-07-21

The insulation performance of SF6 gas is superior, but if it contains water or the surface of the solid medium is damp, the electrical strength will be significantly reduced, SF6 gas insulation performance is superior, if it contains water, the electrical strength will be significantly reduced. As early as the 1970s SF6 circuit breaker used in the early days of the power system, the United States has a number of causes of SF6 humidity exceeded and caused equipment explosion accidents, it can be

2019-07-13

Sulfur hexafluoride (SF6) gas is a non-toxic, colorless, tasteless, chemically stable substance with excellent arc extinguishing and insulation properties. Electrical equipment that replaces insulating oil with SF6 gas as an arc extinguishing and insulating medium is called SF6 electrical equipment. At present, SF6 electrical equipment has been used in the power grid on a large scale, and the types have been extended to current transformer (CT), voltage transformer (PT), capacitors, SF6 combined