. Cassier's magazine. aving theteeth on the under side and meshingwith 36-degree sectors, keyed to rockshafts. These rock shafts are mountedon the under side of the I-beam sup-porting the head shafting, directly overthe centre of each wheel bay. Eachshaft carries two tumblers; one end ofeach tumbler is connected to the cupgates, and the other to counter make the governor or hand wheel an elevation on the hillside as to give apressure of 100 pounds at the powerhouse. This arrangement provides ex-cellent fire protection to the power house is equipped with twolines of 2-i
. Cassier's magazine. aving theteeth on the under side and meshingwith 36-degree sectors, keyed to rockshafts. These rock shafts are mountedon the under side of the I-beam sup-porting the head shafting, directly overthe centre of each wheel bay. Eachshaft carries two tumblers; one end ofeach tumbler is connected to the cupgates, and the other to counter make the governor or hand wheel an elevation on the hillside as to give apressure of 100 pounds at the powerhouse. This arrangement provides ex-cellent fire protection to the power house is equipped with twolines of 2-inch fire hose, allowing allparts to be quickly reached in case ofneed. The station equipment consists ofthree 300KW, alternating-current gen-erators, of the revolving-field are driven by 44-inch belts at aspeed of 514 revolutions per minute,delivering a two-phase current of 7200alternations per minute at 500 current is supplied from two15-KW, direct-current- generators at 27S CASSIERS MAGAZINE. FUSES OF THE HIGH-POTENTIAL CIRCUIT A MODEL ELECTRIC MINING PLANT 279 to the head shaft, the armatures revolv-ing at 600 revolutions per minute. The switchboard is simple, though ofcomplete and attractive design. Thereare several panels of blue Vermontmarble,—an exciter panel, three gen-erator panels, a load panel, containingthe instruments for indicating and re-cording the output, and two panels forcontrolling the feeders to the low-tensionends of the transformers. The wiringand bus-bars on the back of the boardare well supported, and the whole con-struction is firmly braced to the floor,there being no vibration to the generator field rheostats are of therailway type, mounted in iron frames,and are connected to the regulatingdials which are attached to the back ofthe generator panels. There are four raising transformers,each of 150 KW capacity, comprisingtwo banks connected according to theScott method; they transform from 500volts, two-phase to 22,0
Size: 1230px × 2032px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyork, booksubjec
