To reduce overvoltages during the turning off of the gate turn off thyristors, which overvoltages originate from stray inductances in the feed lines, {HEAD ~ an overvoltage capacitor} is connected in parallel with these thyristors via {TAIL ~ the reactor free wheeling diode} 
is connected via
To reduce overvoltages during the turning off of the gate turn off thyristors , which overvoltages originate from stray inductances in the feed lines , { HEAD ~ an overvoltage capacitor } is connected in parallel with these thyristors via { TAIL ~ the reactor free wheeling diode }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL