Investigation of Methods of Railway Train Lighting
Investigation of Methods of Railway Train Lighting
Wray, Edward
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_ Gen. Output "~" The average battery discharge equals 1.86 K. W. Hr. In order to compensate for battery efficiency of 50%, there should have been 3.7 K. W. Hr. charge. Instead of this it is seen that there was about 7.5 K. W. Hr. (av. of two trips). This leaves 3.8 K. W. Hr. of destructive overcharge which might be eliminated. 3.8 K. W. Hr. at 40 volts = 95. amp. hrs. Since the generator was operating for about 11 hrs. this would represent an excess of 8.6 amperes in the regulator setting, and... the generator might be set at about 33J4 amperes with all lamps on instead of 42 amperes as at time of test. DISCUSSION OF RESULTS The most striking of the results observed, and one which is of critical importance to the life of the equipment, is that; the [74] Digitized by VjOOQIC WRAY — METHODS OP RAILWAY LIGHTING 75 batteries are tremendously overcharged on both outgoing and return trips, as is shown by a comparison of the values of en- ergies of battery charge and battery discharge as shown on page 74.
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