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 {TAIL ~ parallel} with these thyristors via the reactor free wheeling diode 
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 { TAIL ~ parallel } with these thyristors via 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 REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH