. Electrical world. into three sections which may be supplied with current ordisconnected at will from one or the other station. The equipmentof the cars is described in detail.—LEclairage Elec, March 5. Single-Phase Traction.—Eicheerg.—The conclusion of his paperon single-phase railroads. The author gives several diagrams incomparing the behavior of two 6oo-volt, direct-current motors withthat to two 6,000-volt, single-phase motors, based on the experi-mental runs with the Winter-Eichberg motor near Berlin. He con-cludes that the single-phase motor is able to fulfill the most rigidrequirement
. Electrical world. into three sections which may be supplied with current ordisconnected at will from one or the other station. The equipmentof the cars is described in detail.—LEclairage Elec, March 5. Single-Phase Traction.—Eicheerg.—The conclusion of his paperon single-phase railroads. The author gives several diagrams incomparing the behavior of two 6oo-volt, direct-current motors withthat to two 6,000-volt, single-phase motors, based on the experi-mental runs with the Winter-Eichberg motor near Berlin. He con-cludes that the single-phase motor is able to fulfill the most rigidrequirements of traction.—Zeit. f. Elek. (Vienna), March 6. Installations, Systems and Appliances. Voltage Regulation in Alternating-Current Systems.—Meyer.—The conclusion of his paper, the first parts of which have alreadybeen abstracted in the Digest. He discusses automatic voltage reg-ulation and compounding. The first method dealt with is by meansof mechanical influence on an exciter rheostat, which is shown in. FIG. I.—VOLTAGE REGULATION. Fig. I. A represents the alternator, AT the exciter, R is the rheostatin the exciter field. Its handle is viorked by means of a Worm gear-ing, from a magnetic clutch, A, which is controlled by the relay, latter device is shown as a solenoid acting against a accordance with a lower or higher supply voltage either thespring or the solenoid will be more powerful, thereby closing theenergizing circuit of Afj or M„, thus increasing or reducing theresistance, R. By adding a second coil, L„, wound in opposition toLj, and controlled from the secondary of a current transformer, V,the primary of which is in series with one of the main lines, over-compounding with increasing current can be obtained. This schemehas been successfully used in a number of plants where the natureof the load introduces only very gradual changes in load. For allother purposes it is not recommended, since the time lag betweenaction and reaction is too
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
