All the partners who have used sulfur hexafluoride know that sulfur hexafluoride is very important for water control. If the water is high, it will cause corrosion damage to sulfur hexafluoride equipment and affect the work effect. So why should we put forward specific requirements for environmental humidity when filling gas? What should be paid attention to when filling?

Moisture is a condition for SF6 equipment to produce toxic substances. If sulfur hexafluoride gas contains more than the specified moisture, when its humidity changes, it may condense on the solid insulation surface to make the surface become damp, and then the surface discharge voltage of the equipment will drop significantly. The low fluoride compound gas generated by SF6 gas decomposition under the action of arc and corona will not generate SO2, HF and other harmful substances if there is no water molecule, thus avoiding equipment corrosion caused by them.

(1) Before the work starts, the relative humidity of the ambient air around the site shall be determined to be ≤ 80%. That is, the percentage value of the density ratio of water vapor in air and saturated water vapor at the same temperature, which is the specific indicator of water content in * * * air. If the measurement is unqualified, take measures or reselect the dry and sunny weather for filling.

(2) In order to timely discharge and replace the leaked sulfur hexafluoride gas, the main tip shall start the ventilator while filling, and carefully observe the regulation that the SF6 content in the air shall not exceed 1000ppm. The inspection shall be carried out within a certain time after the work starts, and the inspection shall be carried out midway as the case may be. When the content of SF6 gas increases or exceeds the standard, the components shall be checked in detail immediately to find out the causes and eliminate them.

Therefore, when the equipment is filled with high-purity sulfur hexafluoride gas, strict measures must be taken to prevent water from entering. If you have any questions, please feel free to ask.

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