Identifier: electricrailway371911newy (find matches)
Title: Electric railway journal
Year: 1908 (1900s)
Authors:
Subjects: Electric railroads
Publisher: (New York) McGraw Hill Pub. Co
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
switch inserted between the transformer and thecircuit breaker. Current for the lights, compressor motor andcontrol is obtained from the secondary of an auxiliary trans-former which is wound to give 300 volts. Seven contactors are required for each pair of motors, andthe control is divided into five steps. A schematic diagram of London, Brighton & South Coast—Pressed Steel Motor Truck Deptford to the signal cabins at Queens Road and PeckhamRye Junction, where it is metered and fed to the overheaddistributing system. The Board of Trade fixed 20 volts as themaximum permissible drop in the return circuit, and this re-quirement made it necessary to install two-conductor boosterand distributer cables throughout the electric zone. The over-head line is sectionalized at each signal cabin, and series boostertransformers, with a ratio of 1:1, are located at every cabin.One side of these boosters is connected across the sectionbreak and the other is in series on the outer conductor of the
Text Appearing After Image:
Bow Collector with TwoContacts London, Brighton & South Coast—Four-Track OverheadConstruction at Balham Junction the control circuits is shown herewith. The taps from the sec-ondary of the main transformer give four voltages varyingfrom 450 volts to 750 volts, and the exciter transformer hastwo ratios. Combinations of these give five speeds, forward orreverse. Special precautions have been taken to prevent acciden-tal contact with any of the high-tension apparatus on the cars.All of the high-tension apparatus, with the exception of themain transformers, is mounted in cabinet built in the motor-mans compartment. The door to this cabinet is mechanically in- booster cable. The outer conductor of the distributer cableis bonded to the track rails and the. inner conductors of boththe booster and distributer cables are connected to the trolleyfeeder busbars in the signal cabins. The overhead trolley construction is especially interesting.For the most part the wires are supported by str

Note About Images