Protective spark-gaps

R-10 Spark voltage, kV 1,35-1,65 R-12 Spark voltage, kV 0,128-0,192 R-18 R-18-1 R-21 Spark voltage, kV 1,05-2,0 R-22 Spark voltage, kV 1,9-2,5 R-23 Spark voltage, kV 0,06-0,24 R-24 Spark voltage, kV 2,0-5,5 R-26 Spark voltage, kV 2,6-3,1 R-27 Spark voltage, kV 0,31-0,39 R-28 R-29 Spark voltage, kV 1,9-2,9 R-2M Spark voltage, kV 1,3-2,35 R-3 Spark voltage, kV 0,6 R-30 Spark voltage, kV 6,7-8,2 R-34 Spark voltage, kV 0,7-1,3 R-35 Spark voltage, kV 0,32-0,38 R-350 Spark voltage, kV 0,31-0,39 R-37 Spark voltage, kV 0,8-2,0 R-38 R-4 Spark voltage, kV 0,07-0,08 R-41 Spark voltage, kV 16-27 R-42 Spark voltage, kV 2,2-3,4 R-43 Spark voltage, kV 140-170 R-44 Spark voltage, kV 2,6-3,4 R-45 Spark voltage, kV 0,3-0,6 R-46 Spark voltage, kV 0,08-0,125 R-460 Spark voltage, kV 0,46 R-47 Spark voltage, kV 6,0-16,0 R-48 Spark voltage, kV 90-110