240 H. W. BUCK 



The switchboard arrangements arc different and in accord- 

 ance with the most approved modern methods of construction. 



In addition to power house No. 2, the Niagara Falls 

 Power company is developing, through its allied company, 

 the Canadian Niagara Power company, 110,000 horsepower 

 on the Canadian side of the falls. The hydraulic features of 

 this development are very similar to those on the American 

 side, which have proved so successful in operation. A wheel 

 pit has been excavated in Victoria park at a place about 

 1,700 feet above the Horse Shoe falls. Into this pit the water 

 is discharged from a short intake canal and forebay, and car- 

 ried off through a tunnel to the lower river. 



The essential difference involved in this plant is in the 

 size of the generating unit. The installation will consist of 

 eleven units of 10,000 horsepower each. When the power 

 development was first started on the American side, a unit 

 of 5,000 horsepower was selected as being a convenient sub- 

 division of the total power development then contemplated, 

 viz., 100,000 horsepower. Now that more than 200,000 

 horsepower is to be developed, a 10,000 horsepower unit can 

 be installed and its relation to the capacity of the whole system 

 will remain the same. Furthermore, great economy in cost 

 of construction results in the use of this larger unit. A 

 10,000 horsepower turbine and dynamo occupy only slightly 

 more space than one of 5,000 horsepower capacity. This 

 effects a considerable saving in length of power house, forebay, 

 wheel pit, etc., for a given plant outfit. Also the cost of one 

 10,000 horsepower turbine and dynamo is less than the cost 

 of two 5,000 horsepower units. The advance in the art of 

 turbine and dynamo manufacture in the last ten years has 

 been such that the construction of 10,000 horsepower ma- 

 chines now is not as difficult a problem as was that of the 

 5,000 horsepower size when the first American power house 

 was built. 



The electric generators in the Canadian plant are wound 

 for 11,000 volts, three phase. This voltage, which is fi-ve 

 times as high as that of the American plant dynamos, was 

 selected for reasons of economy in power distribution. This 

 is about the highest voltage which is considered safe for under- 



