. Electrical world. ades at sharper angles ofthe inner or fifth row are for high or low water. A sliding jacketof steel plate construction operated from a mechanical servo-motorby means of bevel, screw and nut. regulates the admission of Piccard governing system is in use on each turbine. The dynamo shaft is connected with the turbine shaft by anelastic insulating coupling of the Raffard system. The dynamos ofthe Oerlikon three-phase alternating inductor type, develop with a phase voltage of 4,330. since the armature winding isstar-connected. The current strength is 50 amp
. Electrical world. ades at sharper angles ofthe inner or fifth row are for high or low water. A sliding jacketof steel plate construction operated from a mechanical servo-motorby means of bevel, screw and nut. regulates the admission of Piccard governing system is in use on each turbine. The dynamo shaft is connected with the turbine shaft by anelastic insulating coupling of the Raffard system. The dynamos ofthe Oerlikon three-phase alternating inductor type, develop with a phase voltage of 4,330. since the armature winding isstar-connected. The current strength is 50 amp. per phase. .At250 , with 20 poles, the frequency is 50 per second. Themagnet wheel frame is of cast steel and is bolted to a cast-iron hubof six spokes. The outside diameter of the wheel frame is ft.,its width is 3 ft., and its thickness 5 in. Twelve laminated poles arebolted by dove-tailing to the circumference of the magnet frame, ora total of 24. the members of each pair being placed oppo-^ite and 17. ftG. 3.—VIEW OF D.^M AND SUPPLY CANAL. in. apart. The height of each pole is 5J4 in., the width 9 in. and thethickness 8J4 in. The outside diameter of the magnet field is ft. In the space between the opposite poles are built up in two partsthe magnet coils, connected in series, in copper bars 2jX in. x 3/32 in.,to a total number of 166. The weight of the entire revolving portionof the dynamo is tons, while the weight of the magnet copperis I^i tons. The dynamo frame which carries the inductive windings, is intwo parts, a bottom and an upper section, and twelve large openingsare provided in the outside periphery, as shown in the illustrations,for ventilation. This frame is in cross-section a trapezoid of athickness of 12 in. and a width of base of ft. The outsidediameter is ft. Like the magnet wheel, the armature is arranged in correspond-ing parts. The segments of each part are held together by bolts and two cast-iron rings, one of which is remo
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
