[Electric engineering.] . hat the tension on the belt may be adjusted. The ordi-nary incandescent-lighting alternator of the type shown isusually wound for either 1,100 volts or 2,200 volts, as thesepressures are high enough for economical distribution unlessthe distances are longer than are usually met with in thecommon run of towns or medium-sized cities. 96. Fig. 52 shows a General Electric alternator of therevolving-field belt-driven type. This machine is of 300 kilo-watts capacity and is wound to deliver three-phase cur-rents at a frequency of 60 cycles. The revolving field isseen at A, b
[Electric engineering.] . hat the tension on the belt may be adjusted. The ordi-nary incandescent-lighting alternator of the type shown isusually wound for either 1,100 volts or 2,200 volts, as thesepressures are high enough for economical distribution unlessthe distances are longer than are usually met with in thecommon run of towns or medium-sized cities. 96. Fig. 52 shows a General Electric alternator of therevolving-field belt-driven type. This machine is of 300 kilo-watts capacity and is wound to deliver three-phase cur-rents at a frequency of 60 cycles. The revolving field isseen at A, but a better idea as to the construction of themachine will be obtained by referring to Fig. 53. Therevolving field consists of a steel ring B supported by thespider c c. The ring B carries the laminated pole pieces D,which are dovetailed into the ring as shown at e. In thelarger machines the pole pieces are bolted to the ring. Eachpole piece is provided with a field coil d, which, in the larger § 10 ELECTRIC LIGHTING. 89. Fig. 52. machines, is wound with copper strip placed on edge. Thesecoils are connected in series and their terminals brought to
Size: 1992px × 1255px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookidelectricengi, bookyear1902
