[Electric engineering.] . t similar to the AVurts arrester just described, S 17 ELECTRIC LIGHTING. 49 L ine except that fewer spark gaps are used and a non-inductiveresistance r is inserted in the circuit in order to limit thecurrent following the spark gaps a, a are between theheavy metal cylinders b, b, b, themiddle one of which is connectedto ground in the double-pole ar-rester shown. The makers claimthat the arcing is, suppressed bythe cooling effect of the heavycylinders. This arrester, like theprevious one, is not suitable foruse on direct-current 54 shows thi
[Electric engineering.] . t similar to the AVurts arrester just described, S 17 ELECTRIC LIGHTING. 49 L ine except that fewer spark gaps are used and a non-inductiveresistance r is inserted in the circuit in order to limit thecurrent following the spark gaps a, a are between theheavy metal cylinders b, b, b, themiddle one of which is connectedto ground in the double-pole ar-rester shown. The makers claimthat the arcing is, suppressed bythe cooling effect of the heavycylinders. This arrester, like theprevious one, is not suitable foruse on direct-current 54 shows this arrester con-nected on a 1,000-volt circuit. 41. The arresters just describedhave been shown as arranged forindoor use in the station. Theymay, however, be used on theline, in which case they should bemounted in a weather-proof box made of iron or wood. Awooden box will answer every purpose if it is substantiallymade and painted with weather-proof paint. Where-thepressure on the circuit is higher than that for which the. Pig. 53. To L/ne
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