Electrical news and engineering . nd Section main control gate, located in rock section of canal junction with Chippawa creek ofil) rated capacity and of the vertical spiral case, siriKlcrunner Francis type and will operate at a speed of 18 This gives a specific speed of .ifi. The niaximuniguaranteed efficiency is 90 per cent, although in view of re-cent practice it is expected that this efficiency will be ex-ceeded. On model runners of homologous design tested atHolyoke 91 per cent was obtained. The inlet diameter ofthe scroll case is 10 feet and the diameter of the runner is10
Electrical news and engineering . nd Section main control gate, located in rock section of canal junction with Chippawa creek ofil) rated capacity and of the vertical spiral case, siriKlcrunner Francis type and will operate at a speed of 18 This gives a specific speed of .ifi. The niaximuniguaranteed efficiency is 90 per cent, although in view of re-cent practice it is expected that this efficiency will be ex-ceeded. On model runners of homologous design tested atHolyoke 91 per cent was obtained. The inlet diameter ofthe scroll case is 10 feet and the diameter of the runner is10 ft. 5 in. at the inlet. An open space has been left in thepower house foundations below the runner, so that by re-moving a section of the draft tube can be takenout from below, thus obviating the necessity of dismantling SSJ!^.^iSWIip(*ii(w*. the generator when a renewal of the runner is runner is designed for a capacity of 61,000 and isgated back to a maximum capacity of .).5,000 Thereason for this is that the turbines, which will normally op-erate at or near full rated load, will also therefore operate altheir maximum efficiency. Governor SystemThe centrifugal head, relay valves, and hand control foreach governor arc located on the generator lloor whilethe main automatic valve control is located directly under the governor stand at the level of the turbine regulatingcylinders. The advantages of this arrangement are theshort piping between the main valve and the regulating cyl-inders and the separation of the two main parts of the gov-ernors, giving freer access for repairs and maintenance. Thepressure fluid is water, treated with soluble oil. which will pre-
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Keywords: ., bo, bookcentury1800, bookdecade1890, bookidelectricalnewsen31donm
