Show electrical EQUIPMENT for MINES WRITTEN FOR THE MINING REVIEW 11 the new power plant which witherbee sherman company are erecting on the lake champlain shore at port henry new york furnishes an interesting example of the growth of electricity in mining it is not generally known that the lower champlain lake region produces a goodly proportion of the united states annual supply of iron ore the various shafts of this company alone yield from to tons of iron ore yearly while with the new electrical equipment the ultimate output will be tons owing to the fact that the principal shafts of the mines are scattered over ove a considerable sid erable area electricity has been found to be the most flexible form of power transmission and is almost universally used power for this purpose is generated at present both by water and steam at mineville lineville Mi neville there is a steam plant with a kilowatt engine driven generator which supplies current at volts for local distribution this power is supplemented by two small water power plants a kilowatt water wheel driven generator unit is located at wadhams mills and a kilowatt unit at kingdom about eight miles from this point at wadhams mills a morgan smith water turbine is used operating under a 48 foot head power at the kingdom plant is furnished by a pelton impulse wheel under a head of feet water being carried through a 32 inch pipe a distance of 1 miles from the reservoir these stations are situated about eleven miles from neville mineville Mi and deliver current at mineville lineville Mi neville at a potential of volts this voltage made desirable because of the saving in transmission is stepped down to at neville mineville Mi and is used in conjunction with the kilowatt volt steam driven machine to supply power at the various shafts induction motors are used for driving hoists pumps air compressors etc operated at 25 cycles and volts the power house which is being built at port henry is some six miles from the mines and will be interconnected with the other sources to supply the increasing demand for power the station is to be thoroughly modern being built of monolithic re enforced concrete not only the building but the stack will be constructed of this material iron clad portland cement manufactured by the glenns falls portland cement company will be used mixed with tailings from the mines fireproof construction st will be employed throughout ana the station is to be a typical example of the use of this building material the structure is planned after the roman style of architecture and is of pleading design the main building containing the boilers is one hundred and sixteen feet by fifty four feet while the turbine gene generator r room measures thirty nine by fifty nine feet and extends at right angles from the center of the main structure by making use of the curtis turbine much floor space is saved and the building is very compactly constructed steam will be generated by four horsepower babcock and wilcox boilers arranged in pairs on either side of a foot stack which occupies about the center of the power house there is space for two more boilers of the same capacity one at the side of each pair the boilers are hand fired and coal is conveyed to each by a car on a track running the length of the building this car is filled from an overhead hopper through a hinged chute the hopper is filled by a vertical bucket converter which carries the coal from a pit filled directly from cars outside the building the generating equipment comprises an kilowatt curtis steam turbine generator which will deliver current directly to the line at a potential of volts and 25 cycles the compactness of the vertical unit has permitted a remarkably economical disposition of machinery in the generating room space is left for the installation of a second turbine which will probably be installed at once the switchboard is located in a gallery with a re enforced concrete floor on this floor is placed also the motor driven exciter sets and space is available for two frequency changer lighting sets A supplementary exciting unit is provided by a 25 kilowatt horizontal curtis steam turbine generator the entire electrical equipment for this power house will be furnished by the general electric company |