52 



BELL SYSTEM TECHNICAL JOURNAL 



3 4 5 6 



MICROSECONDS 



Fig. 13 — Single sparkover of "B" transient, 

 with single arc (voltage). 



12 3 4 



MICROSECONDS 



Fig. 14 — Single sparkover of 

 "B" transient, with single arc 

 (current). 



3 4 5 6 



MICROSECONDS 



Fig. 15 — Single sparkover of "B" transient, with double arc (voltage). 



12 3 4 



MICROSECONDS 



Fig. 16 — Single sparkover of "B" transient, with double arc (current). 



