Transactions . alternating-current coal-cutting machines. On the same feeder cable isconnected a 300-kw. 2300/220-volt motor-generator set supplying directcurrent for the main haulage trolley. This motor-generator set alsosupplies current to twelve stations for charging the storage batterylocomotives. The other switch and cable supphes power to a 100 motor-generator set for the main haulage direct-currenttrolley and also connects to twentj-^ underground substations for supply-ing 220-volt alternating current to the coal-cutting machines. The 75-kw. underground substations are
Transactions . alternating-current coal-cutting machines. On the same feeder cable isconnected a 300-kw. 2300/220-volt motor-generator set supplying directcurrent for the main haulage trolley. This motor-generator set alsosupplies current to twelve stations for charging the storage batterylocomotives. The other switch and cable supphes power to a 100 motor-generator set for the main haulage direct-currenttrolley and also connects to twentj-^ underground substations for supply-ing 220-volt alternating current to the coal-cutting machines. The 75-kw. underground substations are at more or less temporarylocations so that equipment can be moved as the work progresses, thusavoiding long secondary runs and giving full voltage to the of the 1350-horsepower hoist motor will be secured from theunderground substation located near the base of the shaft. The operator,by means of switches and indicating devices, has positive control of the VOL. LXIII. 10. ()26 OUTDOOR SUBSTATIONS. II. W. YOUNG 627
Size: 1170px × 2137px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
