. Electric railway gazette . ide from this it isdoubtfulif the motors would stand such hard The difficulty of unequal distribution of voltage has beensuccessfully met by the Edison three-wire system, and hasreduced the impracticable system, just described, to athoroughly practical one, presenting many points of van-tage. It is shown in Fig. 48. Two dynamos of the required voltage are connected inseries, thus producing the necessary voltage at their twofree terminals,-^ and B. The cars, or other translatingdevices, are connected in precisely the same way as before,with the important exc
. Electric railway gazette . ide from this it isdoubtfulif the motors would stand such hard The difficulty of unequal distribution of voltage has beensuccessfully met by the Edison three-wire system, and hasreduced the impracticable system, just described, to athoroughly practical one, presenting many points of van-tage. It is shown in Fig. 48. Two dynamos of the required voltage are connected inseries, thus producing the necessary voltage at their twofree terminals,-^ and B. The cars, or other translatingdevices, are connected in precisely the same way as before,with the important exception that a third wire, called theneutral wire, connects the middle of the two translatingdevices to the wire connecting the two generators. Thiseffects a perfect balance of voltage between the twosystems. Wherever there are more devices on one side of the sys-tem than on the other, the dynamo on the side having themore devices is more heavily loaded. Although it is anadvantage to have both dynamos equally loaded, by prop-. erly wiring up a system it is possible to reduce this unbal-ancing to a negligible amount. In a railway system the application would be as follows:There would be two distinct sets of feeders, one for eachside of the three-wire system. The area of these feederswould be of sufficient capacity to carry just one half of thecurrent the cars require. The neutral or third wire wouldbe the ground. As a usual thing the current will pass outof one feeder down the trolleys of one set of cars and intothe ground; whence it would pass into the wheels of theother set of cars, up to their trolleys and into the secondset of feeders, back to the station. If there should be onthe positive side of the system more cars than on the nega-tive side, these cars would return their current to thestation via the neutral wire, or, in this case, the there be more cars on the negative side, the extra carswill receive their current from the neutral wire, and notfrom the positiv
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1895
