2017-02-20

The SF6 gas density relay can accurately measure the SF6 gas density value only when the circuit breaker is out of operation and the temperature inside and outside the circuit breaker reaches the balance. When the circuit breaker is running, if the circuit breaker leaks SF6 gas, due to the effect of temperature rise, more SF6 gas should be leaked than when the circuit breaker exits the operation, so that the electrical contact of the density relay can be closed.

2017-02-18

(1) SF6 gas density relay can only compensate for the pressure change caused by the change of ambient temperature, but can not compensate for the load current through the conductor resistance and contact resistance when the equipment is running with electricity, all the electrical power consumed is converted into heat energy, so that the conductor heating causes the pressure change caused by the internal temperature rise of the equipment, especially in the case of high temperature and large load

2017-02-15

SF6 gas has a century-old history, it is two French chemists Moissan and Lebeau synthetic artificial inert gas in 1900, around 1940, the United States military used it for the Manhattan Project (nuclear military). Since the mid-1960s, SF6 has been widely used as an insulating medium for high-voltage electrical equipment. SF6 gas-insulated switchgear covers a much smaller area than conventional open-type high-voltage distribution devices, and its operation is not affected by external meteorolo

2017-02-13

In case of a large amount of gas leakage due to the failure of indoor SF6 equipment, the staff should turn on the indoor ventilation device before leaving the accident site. Within 4 hours after the accident, any personnel entering the room must wear SF6 special protective clothing, SF6 special SF6 full cover, gloves, anti-static and anti-chemical safety shoes and SF6 positive pressure air breathing apparatus. After the accident, when cleaning the solid decomposition products inside the equipmen

2017-02-11

Sulfur hexafluoride gas in electrical equipment through corona, spark and arc discharge, but also produce a variety of toxic, corrosive gases and solid decomposition products. These gases mainly include thionyl fluoride (SOF2), sulfuryl fluoride (SO2F2), sulfur tetrafluoride (SF4), sulfuryl tetrafluoride (SOF4), sulfur dioxide (SO2), disulfide decafluoride (S2F10), disulfide oxydecafluoride (S2F10O), etc. The main solid decomposition products are copper fluoride (CuF2), difluorodimethylsilicon [

2017-02-10

Pure sulfur hexafluoride gas is non-toxic, but becomes toxic when sulfur hexafluoride is impure or decomposes. The toxicity of sulfur hexafluoride gas mainly comes from five aspects. 1, some toxic products of sulfur hexafluoride gas in electrical equipment when the high-temperature arc occurs. 2, sulfur hexafluoride products are not pure, containing highly toxic low sulfur fluoride, hydrogen fluoride and other toxic gases when leaving the factory. 3, the sulfur hexafluoride gas and decomposi