However, if, as a result of an increase or {TAIL ~ decrease} in {HEAD ~ the load requirement} of load 78, the frequency of the voltage from frequency sensor 80 differs from the reference frequency, an error voltage from summer 82 is provided 
However , if , as a result of an increase or { TAIL ~ decrease } in { HEAD ~ the load requirement } of load 78 , the frequency of the voltage from frequency sensor 80 differs from the reference frequency , an error voltage from summer 82 is provided
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH