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Regulator for providing the necessary variation in the Supply Voltage to meet the requirements of the Battery charging to be furnished.
(b)
One Motor Alternator Set comprising a 30 KW, Alternating Current Generator direct coupled to and driven by a Continuous Current Motor. The Alternator to supply single phase current at a pressure of 1000 volte and a fraquency of 300 cycles for feeding the primary circuit The Motor to furnish aufficient mechani- of a step up Transformer. cal power to drive the Alternator at full load with a surplus for driving the Disc Discharger described below, which is to be mounted on an extension of the bedplate carrying the machines and driven direct coupled in the set.
The Motor to be furnished with a suitable Starter fitted with no-load and over-load Safety Relasing Deviceo, and with a Regula- ting Resistance in the circuit of the Ercitation Coila to afford
The Alternator
the necessary regulation of the speed of the Set. to be provided with a Regulating Resistance in the Excitation Coils to afford the necessary variation of the Alternator pressure of
supply.
All the machines described above to be furnished with special non-laductive shunting resistances soroas the various rindings to protect them against injurious induced effects from the high fre-
quency cirouita.
ACCUMULATOR BATTERY.
To consist of a Battery of 60 Cells in lead lined wooden boxes and furnished with all necessary insulators, separators, cover rlates and connectors and the usual accessories in the share of
A Still for preparing the Hydrometere and Cell Testing Voltmeter. addi tional water required from time to time for filling up and a Set of Spares for replacing the amuller parts to be provided.
The Battery to have a capacity sufficient for running the Motor Alternator Set for three hours with the Alternator fully loaded. (This rating of the Battery ensures that the cells shall
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