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Gas Insulated Switchgear Monitoring

  • Detection limit (3 sigma) < 0,1 Vol.% 
  • Linearity error < 0,5 % FS (Fullscale) 
  • Including Temperature-compensation 5 - 45 °C 
  • Including pressure compensation 600 - 1200 mbar 
  • Ready to use module 
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INFRA.sens® AK2/μP compact // INFRA.sens® AK20G compact 

To save the atmosphere – for quality and leakage measurement

In gas-insulated high- and medium-voltage switchgear, sulfur hexafluride (SF6) is used as an insulating and quenching gas. 

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Due to its structure, the gas is chemically inert and has a relative density about five times that of air. SF6 is capable of switching off high short-circuit currents within milliseconds and extinguishing the resulting arcs. For qualitative control and monitoring of SF6 the INFRA.sens® SF6 – AK2 / P can be used which detects concentrations up to 100 Vol.% SF6. Due to the density of the gas, a special procedure for linearization with associated pressure, zero point temperature and end point temperature compensation is performed. Due to its greenhouse potential, leak detection is an important application in which Wi.Tec’s INFRA.sens® SF6 – AK20G / P can be used. This measures down in the ppm range and is also zero and end point temperature compensated, as well as pressure compensated. 

Since SF6 has a high GWP, alternative insulating gases will be used in the future. These are e.g. CO2, NOVEC 4710 etc. These gases can also be measured with the INFRA.sens® technology. 

Furthermore, we can measure the reaction products, such as CO, H2S and SO2 in the insulating gas. 

Features & Benefits

  • Detection limit (3 sigma) < 0,1 Vol.% 
  • Linearity error < 0,5 % FS (Fullscale) 
  • Including Temperature-compensation 5 - 45 °C 
  • Including pressure compensation 600 - 1200 mbar 
  • Ready to use module