. Electric railway journal . Rochester Power Plants—Interior of Substation No. 33,Showing Transformers and High-Tension BusConstruction Near the Ceiling it is also sent on to Syracuse. From Mortimer the energyis brought over two separate transmission lines to thesubstation referred to, which is known as Station No. Niagara, Lockport & Ontario Companys switchingstation is located about 4 miles outside the city and 50-ft. steel towers and aluminum cables run on a privateright of way adjacent to the Lehigh Valley Railroad tracks, between both stations. The transmission line carrie
. Electric railway journal . Rochester Power Plants—Interior of Substation No. 33,Showing Transformers and High-Tension BusConstruction Near the Ceiling it is also sent on to Syracuse. From Mortimer the energyis brought over two separate transmission lines to thesubstation referred to, which is known as Station No. Niagara, Lockport & Ontario Companys switchingstation is located about 4 miles outside the city and 50-ft. steel towers and aluminum cables run on a privateright of way adjacent to the Lehigh Valley Railroad tracks, between both stations. The transmission line carries 60,000-volt, three-phase, 25-cycle current and before entering thetransformer station the lines pass through protective ap-paratus carried on some 40 wooden poles. These polescontain three series of horn lightning arresters with air-gaps and resistance. The shortest path consists of a car-borundum resistance; the next consists of a concrete col-umn and the longest path comprises about 15 ft. of thin. Rochester Power Plants—Exterior of Substation No. 33,Showing Incoming Niagara Transmission Lines copper wire acting as a fuse. The lightning arresters areof a type specially designed for the Niagara, Lockport &Ontario system. The theory on which these arresters areinstalled is that for ordinary slight static disturbances inthe line, the arrester having the lower striking willdischarge, and since it has in series with it a compara-tively high resistance, the resultant disturbance due to thecurrent which follows the discharge will be comparativelyslight. A more severe static disturbance causes the arresterhaving the lowest gap and the arrester having the nexthigher gap to discharge simultaneously, thus affording twopaths to earth, the combined resistance and inductance ofwhich is much lower than that of the first path. Whenboth arresters discharge the disturbing effect on the system,due to the generated current which follows, is much severerthan that in the first instanc
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