Electrical news and engineering . turers products, but this is the long as a liattery can be charged at about this rate (in orderto compensate for the discharge), tlien it is tlie proper batteryto select. 1 might have said, A battery capable of maintaining1,400 for one hour would keep a steady generator load of GOOami)eres with a battery capable of being discharged at the aboverate and charged at 700 jimperes, becjuise 700 amjieres is a safecharging rate for :i battery cnp:ibb of discharging J,400 for onehour. CANADIAN RLECTftlCAL NEWS 5 in tlie load above or below this fixed geuo
Electrical news and engineering . turers products, but this is the long as a liattery can be charged at about this rate (in orderto compensate for the discharge), tlien it is tlie proper batteryto select. 1 might have said, A battery capable of maintaining1,400 for one hour would keep a steady generator load of GOOami)eres with a battery capable of being discharged at the aboverate and charged at 700 jimperes, becjuise 700 amjieres is a safecharging rate for :i battery cnp:ibb of discharging J,400 for onehour. CANADIAN RLECTftlCAL NEWS 5 in tlie load above or below this fixed geuorator will thereforechange the pressure on the carbon piles, resulting in wide varia-tion in their contact resistance. Advantage is taken of this resistance variation in the carbonpiles to control the field excitation of the booster through theintermediary of a small exciter, the field of which is the middlewire of a three wire system as shown in diagram in Fig. 2. Inexplanation of the diagram, if the pull exerted by the solenoid. desired amount by varying the tension of the spring at the endof the lever which regulates the pressure on the carbon adjustment is made by a small haudwheel and may bealtered from time to time to meet any considerable changes inthe nature of the load, so that the battery can be either floating,giving continuous pealc discharge, or being charged according tothe adjustment, while always automatically taking the moment-ary fluctuations of the load. The output of the exciter is almost infinitesimally small ascompared with the booster it controls. For a 500 booster itwould only be , and it is obviously a quicker operationto reverse a machine for than one of 500 In orderto eliminart;e any possibility oflag in reversing, the exciter isdesigned to give three times the excitation volts necessary togive the required boost across the booster armature, thus ensur-ing instantaneous response, the carbon regulator automaticall
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Keywords: ., bo, bookcentury1800, bookdecade1890, bookidelectricalnewsen20donm
