. Electrical world. s six-phase, has26 poles and operates at a speed of 115 Its normal full loadis 7,400 amp. at any voltage between 240 and 300. Its armature isnearly 13 ft. in diameter, its commutator 11 ft., and its collector ringsare 6 ft. Including the shaft, the revolving parts weigh approxi-mately 35 tons, and the machine complete, with base and two bear-ings, 93 tons. The overall dimensions are as follows: Height abovefloor line. 14 ft.: width, 17 ft; overall length. IS/^ ft. These converters are guaranteed for continuous operation at 7,400amp. and 270 volts without heating more
. Electrical world. s six-phase, has26 poles and operates at a speed of 115 Its normal full loadis 7,400 amp. at any voltage between 240 and 300. Its armature isnearly 13 ft. in diameter, its commutator 11 ft., and its collector ringsare 6 ft. Including the shaft, the revolving parts weigh approxi-mately 35 tons, and the machine complete, with base and two bear-ings, 93 tons. The overall dimensions are as follows: Height abovefloor line. 14 ft.: width, 17 ft; overall length. IS/^ ft. These converters are guaranteed for continuous operation at 7,400amp. and 270 volts without heating more than 35° C. on any part,and for continuous operation at 9,250 amp. and 270 volts (25 per centoverload) the temperature rise under this condition not to exceed45° C. on any part. Immediately following either of the above con-ditions, 11,100 amp. at 270 volts (50 per cent, overload) for twohours was guaranteed not to produce a temperature rise exceeding55° C. on any part. The converters have been thoroughly tested. KIG. 2.—ROTARY CONVERTER. at Schenectady under the normal and overload conditions, meetingthe heating guarantees by a liberal margin and commutating through-out the range with practically no sparking at the brushes. Inclusiveof all mechanical and electrical losses, the efficiencies were as fol-lows: i^ load, 9554; fu lo3d, 95^; ^ load, 95; 1-2 load, 93H. Four of these converters are to be used by the New York EdisonCompany on its lighting circuits. 45,000 KW Equipment for Niagara Falls Plant. The Toronto & Niagara Falls Power Company, of which Mr. Pellat, of Toronto, is president, and Mr. F. S. Pearson, NewYork, consulting engineer, has just placed a very interesting contractfor generators to be installed in its Niagara Falls plant. There will be six generators of 7,500-kw capacity each. The con-tract was secured by the Canadian General Electric Company. Thecontract for the turbines has not yet been determined on. Mr. W. P. Plummer, 29 Broadway, New York, wh
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
