“…Recent theoretical and experimental work on current interruption in gas-blast breakers has emphasised the role of turbulence as a critical energy-dissipating mechanism shortly before and during the recovery process (Swanson et al 1971, Hermann et al 1976, Howatson and Topham 1976, El Akkari and Tuma 1977, Hermann and Ragaller 1977, Jones 1977, Swanson 1977. As a general result of this work the turbulent exchange between arc and flow in the downstream nozzle section has been assigned a very important role.…”