344 



ELECTRICAL EQUIPMENT 



design as described above and sets alongside of each generator. 

 Dirty oil from the bearings flows by gravity into the filter, while 

 the clean oil is pumped direct to the bearings by means of a rotary 

 pump, belt or chain driven from the governor shaft. The dis- 

 charge of this pump is provided with a relief valve with by-pass 

 leading back into the clean oil compartment of the filter. The 

 piping at these units is arranged practically the same as shown 

 in Fig. 204, that is, the inlet and outlet lines are provided with 

 thermometers, sight flow indicators, etc. 



Fig. 205 shows the installation at the plant of Columbia Mills, 

 Inc., Minetto, N. Y. This plant contains six 2000 H.P, units 



FIG. 205. Individual Oiling and Filtering Systems for each Generating Unit. 



Peterson System. 



and in order to insure continuous operation an auxiliary filter, 

 with necessary pumps, oil storage tanks, etc., is located at the end 

 of the generator room, with clean oil and dirty oil manifolds con- 

 necting with the individual filters on each machine. If, for any 

 reason, it is desired to cut out one of the individual oiling systems 



