. Development and electrical distribution of water power . h standard practice, but each ofthem is enclosed in a separate concrete room containing no addi-tional apparatus except lightning arresters. The control switchboard is mounted on a gallery overlookingthe machine-room. It is built of black slate and is a combination 296 DEVELOPMENT AND DISTRIBUTION OF WATER POWER bench and panel board, consisting of nine divisions. The firstpanel on the left controls the station auxiliaries, the feeder forwhich is taken off the two centre sections of the 2,300-volt busthrough solenoid-operated oil switc
. Development and electrical distribution of water power . h standard practice, but each ofthem is enclosed in a separate concrete room containing no addi-tional apparatus except lightning arresters. The control switchboard is mounted on a gallery overlookingthe machine-room. It is built of black slate and is a combination 296 DEVELOPMENT AND DISTRIBUTION OF WATER POWER bench and panel board, consisting of nine divisions. The firstpanel on the left controls the station auxiliaries, the feeder forwhich is taken off the two centre sections of the 2,300-volt busthrough solenoid-operated oil switches and then through two sole-noid-operated oil switches to the panel. The second and third panels are equipped for handling theexciter circuits, and each is provided with an ammeter, a voltmeter,and two single-pole, double-throw knife switches for connectingthe exciter to either of the two exciter buses. The panel also hastwo double-pole, double-throw switches for connecting the exciterbus to the station lighting circuit and to the operating buses which. Fig. 151.—Disconnecting Switch and Choke-coil. control the oil-switch motors, the lamps on the control board, andother auxiliaries. Panel No. 4 is blank, while Nos. 5, 6, 8, and 9 are generatorpanels. Each of the latter is equipped with three Thomson am-meters, a field astatic ammeter, a curve-drawing ammeter, a curve-drawing voltmeter, and a curve-drawing wattmeter. The seventh panel is the auxiliary feeder, bus-sectionalizingand station panel. It contains a synchronism indicator and twovoltmeters on the synchronizing bus, an ammeter on the groundcircuit, and an ammeter on the auxiliary feeders. The bench of the switchboard has controlling switches withred and green signal lamps for each of the four generators, andthere are also provided control switches for each of the two 2,300-volt feeder switches, for the switches on the 2,300-volt bus sections,and for the 75,000-volt outgoing line switches. The base of each KERN RIVER
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