These are constructed of brick,
small doors for inspection and maintenance being provided opposite all
points where the bus bars are supported upon insulators. The
photographs on pages 95 and 96 are views of a part of the bus bar
and switch compartments.
[Illustration: TWO GROUPS OF TRANSFORMERS]
The oil switches and group bus bars are located upon the main floor
and extend along the 59th Street wall of the engine room a distance of
about 600 feet. The main bus bars are arranged in two lines of brick
compartments, which are placed below the engine-room floor. These bus
bars are arranged vertically and are placed directly beneath the rows
of oil switches located upon the main floor of the power house. Above
these rows of oil switches and the group bus bars, galleries are
constructed which extend the entire length of the power house, and
upon the first of these galleries at a point opposite the middle of
the power house are located the control board and instrument board, by
means of which the operator in charge regulates and directs the entire
output of the plant, maintaining a supply of power at all times
adequate to the demands of the transportation service.
[Illustration: MOTOR-GENERATORS AND BATTERY BOARD FOR CONTROL
CIRCUITS--SUB-STATION]
[Illustration: 1,500 K. W. ROTARY CONVERTER]
[Sidenote: _The Control
Board_]
The control board is shown in the photograph on page 97. Every
alternator switch, every selector switch, every group switch, and
every feeder switch upon the main floor is here represented by a small
switch.
Pages:
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127