Deve loped measurements system for evaluation of gas pressure value in direct
vicinity of switching arc plasma was described in this paper. The system is
resistant to heavy duty conditions present inside the MV switch quenching
chamber and its functionality was verified during large scale functional tests.
In this paper results of gas pressure measurements performed for a current
interrupter equipped with an arc quenching system based on combination of
forced air flow and gassing material ablation were presented. Gas pressure was
measured by means of developed system, for several values of capacitive load
current at 12/24 kV supplying voltage.