. The street railway review . was de-cided, however, in the interest of parallel operation to connect toeach alternator two engines, with cranks 90° aparl, rather than one,in order to obtain a more uniform turning moment. Flywheels 15ft. in diameter and weighing 60,000 lb. were used to assist paralleloperation and decrease the shock on engines when, as often occurs,SO per cent ovCTload is suddenly thrown on or off. In spite of the for delivery to the sub-stations where it is stepped down to 390 switching is done on the low tension side of the transformers are connect
. The street railway review . was de-cided, however, in the interest of parallel operation to connect toeach alternator two engines, with cranks 90° aparl, rather than one,in order to obtain a more uniform turning moment. Flywheels 15ft. in diameter and weighing 60,000 lb. were used to assist paralleloperation and decrease the shock on engines when, as often occurs,SO per cent ovCTload is suddenly thrown on or off. In spite of the for delivery to the sub-stations where it is stepped down to 390 switching is done on the low tension side of the transformers are connected permanently to the line, and maybe considered a part of the line, although each can be disconnect-ed by means of bayonet switches and flexible leads. In the districtwhere the road is located lightning discharges are very ends of the line are protected by choke coils and low equiva-lent arresters, and the transformers add a further protection to thegenerators and converters. The transmission line is made up of. COM. iKiisii ^^. lliree bare copper wires No. 4 B & S gage, forming a triangle with30-in. sides. The insulators are glass, with a double petticoat, ofwhich the larger one measures 7 in. in diameter. The insulatorsarc supported by locustwood pins 7 in. long above the cross-armand 2 in. in diameter in the shank. The pins are boiled in line has been thoroughly reliable and has never given theslightest trouble since it started in operation, nearly a year ago. Two permanent sub-slations are at present provided, one at thepower house and one at Nuangola, each equipped with one and foundations for one additional. These convertersdeliver current at 625 volts to the contact rail and are rompDundcd 894 STREET RAILWAY REVIEW. [Vol. XIII, No. ii. lo iiiaintaiii vollngc and unity power ( aildition to the permanent siil>-slations is a portable which is usnally located In the power house o
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
