TRANSMISSION OF POWER HY A L 77://.Y ,1 TING CURRENT ;W!> 



number being clamped together in a stack, Fig. 362. Each 

 cone is about half filled with electrolyte. The entire stack is 

 immersed in oil, as the oil acts as an excellent insulator and also 

 absorbs the energy of the dischan 



Were the stack connected directly across the line, the charging 

 current to the stack would cause considerable heating in the cell 

 and would therefore reduce its capacity for absorbing the energy 



;( ,3. 37,000-volt aluminum 



itdoor service on 



, ungrounded 



of the discharge. Consequently, there is a small hum gap in 



with each arrester, as shown in I 



short in comparison with the arcing di>tanee of the circuit, so 

 that it does not ii, (tent wit h discharges occurring 



during abnormal voltage rises. The use of spli t he gape, 



which arc shown in I increases the speed ,,f the gape in 



discharging high-fn-qiH-ney impulses. 



