SYNCHRONOUS GENERATORS 



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nuts. The oil passes from the outside to the inside of the filter 

 units, then out through nozzles which project through the wall of 

 the filtering compartment to the clean oil compartment. The 

 nozzles on each unit fit into spring-actuated valves so that any 

 individual unit can be withdrawn and cleaned without interfering 

 with the continuous operation of the filter. When the filter unit 

 is withdrawn this valve closes and prevents unfiltered oil from 

 flowing into the clean oil compartment. 



In order to afford the operators complete control over the 

 operation of the oiling system and also to provide necessary plant 



FIG. 204. Oil Piping Arrangement, Showing Indicators. 



records it is customary to arrange the oil piping at the individual 

 units as shown in Fig. 204. Such equipments include sight- 

 flow indicators, oil meters and recording as well as indicating 

 thermometers. 



Instead of installing a central system, as described above, it is 

 occasionally found desirable to provide each generator with its 

 own individual oiling and filtering system. A plant equipped in 

 this manner is shown in Fig. 205. The filter is of the same general 



