[Electric engineering.] . amperes, although thecurrent used on the system rises to about 20,500 the battery were not used, it is evident that sufficientmachinery would have to be installed to handle 20,500amperes. The single-shaded areas represent the intervalswhen the battery is charging. By using a battery in thisway, a station can, in very many cases, provide for anincreased output without installing any additional dynamos,engines, or boilers, and at the same time it can work theexisting machinery to the best advantage at or near its fullcapacity. Not only this, but the battery l
[Electric engineering.] . amperes, although thecurrent used on the system rises to about 20,500 the battery were not used, it is evident that sufficientmachinery would have to be installed to handle 20,500amperes. The single-shaded areas represent the intervalswhen the battery is charging. By using a battery in thisway, a station can, in very many cases, provide for anincreased output without installing any additional dynamos,engines, or boilers, and at the same time it can work theexisting machinery to the best advantage at or near its fullcapacity. Not only this, but the battery largely avoids thedanger of overloads on the machinery, thus reducing thedanger of breakdowns. /. III.—23 . 70 Amperes21000- 20000- 19000- 14000 13000- 12000- 8000-7000- 4000-3000- ELECTRIC LIGHTING. §17 2000- , B mi .;.;:. ?/ :?: - \ B Wk , ,/ —4^J \ \ -: * • \ 1 12 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 Fig. 67. Amperes17000- 16000- 150001400013000-12000110001Q0009000800070006000-5000-. FiG. 68. §17 ELECTRIC LIGHTING. 71 (>0. Battery Carrying Whole Tjoad on Station.—The curve, Fig. 68, shows the load curve for the same station asthat shown in Fig. 67. This curve represents the load on aSunday, and the load is very light compared with thatshown in Fig. 67, because this station supplies a businessdistrict. It is seen that the generating plant is shut downaltogether from a. m. to 2 p. m., thus giving an oppor-tunity for inspection or repair and allowing the station to berun with a small force of men. When the generators arestarted up at 2 p. m., the batteries are charged, as shown bythe single-shaded area, thus allowing the generators in useto be run at more nearly their capacity, instead of on a lightload only. 61. Battery Supplying Current From Substations. The use of storage batteries in this connection will be under-stood by referring to Fig. 69, where A represents the
Size: 3437px × 727px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookidelectricengi, bookyear1902
