2017-05-19

The SF6 qualitative leak detector generally uses the corona principle and the electronegative capture principle. The basic working mode of the corona principle is that there is a miniature sensor in the head of the detector hose, the sensor is made of alloy steel, and can produce a micro-current high voltage of about 2000V when working. The fluorine molecules entering the end of the hose produce different electrical signals at high pressure, with different concentrations and different electrical

2017-05-18

(1) Before the overhaul of SF6 circuit breaker, the circuit breaker should be opened first, cut off the operating power supply, release the energy of the operating mechanism, use HC series SF6 gas recovery and inflation device to recover the gas in the circuit breaker, and the residual gas must be extracted by vacuum pump, so that the vacuum degree in the circuit breaker is lower than 133.33Pa.

2017-05-18

(1) If the red and green lights are not on before the closing operation, the control circuit is broken or there is no control power supply (such as control safety). It can check whether the various components of the control power supply and the entire control circuit are normal, such as whether the operating voltage is normal, whether the fuse is blown, whether the anti-jump relay is normal, whether the auxiliary contact of the circuit breaker is good, and whether there is a pressure reduction l

2017-05-18

1. Strong breaking ability Sulfur hexafluoride circuit breaker is by blowing SF6 gas to complete the arc blowing, it has fast arc blowing speed, short arc burning time and large breaking current, which can effectively protect the safety of medium and high voltage circuits. Sulfur hexafluoride circuit breakers do not have the risk of reignition and reignition after disconnecting the capacitor or inductive current.

2017-05-18

If the pressure of sulfur hexafluoride gas is too low, the insulation and arc extinguishing capacity of sulfur hexafluoride equipment will be reduced, if the pressure is too high, the mechanical life of the circuit breaker will be shortened, and the circuit breaker gas may be easy to liquefy, and the insulation and arc extinguishing capacity will be reduced, so it is generally necessary to charge according to the rated pressure of each gas chamber.

2017-05-15

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 decomposition in the electrical equipment react with the electrode (CU-W alloy) and metal materials (AL, Cu) to produce some