The photographs on
page 98 illustrates the construction of this cable.
[Sidenote: _Sub-Station_]
The tri-phase alternating current generated at the power house is
conveyed through the high potential cable system to eight sub-stations
containing the necessary transforming and converting machinery. These
sub-stations are designed and located as follows:
[Illustration: DIAGRAMS OF DIRECT CURRENT FEEDER AND RETURN CIRCUITS]
Sub-station No. 11--29-33 City Hall Place.
Sub-station No. 12--108-110 East 19th Street.
Sub-station No. 13--225-227 West 53d Street.
Sub-station No. 14--264-266 West 96th Street.
Sub-station No. 15--606-608 West 143d Street.
Sub-station No. 16--73-77 West 132d Street.
Sub-station No. 17--Hillside Avenue, 301 feet West of
Eleventh Avenue.
Sub-station No. 18--South side of Fox Street (Simpson
Street), 60 feet north of Westchester Avenue.
[Illustration: SWITCH CONNECTING FEEDER TO CONTACT RAIL]
[Illustration: CONTACT RAIL JOINT WITH FISH PLATE]
The converter unit selected to receive the alternating current and
deliver direct current to the track, etc., has an output of 1,500
kilowatts with ability to carry 50 per cent. overload for three hours.
The average area of a city lot is 25 x 100 feet, and a sub-station
site comprising two adjacent lots of this approximate size permits the
installation of a maximum of eight 1,500 kilowatts converters with
necessary transformers, switchboard and other auxiliary apparatus.
Pages:
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134