{HEAD ~ The error voltage} represents {TAIL ~ the magnitude} and sign of the difference between the actual and the required common power component 
represents
{ HEAD ~ The error voltage } represents { TAIL ~ the magnitude } and sign of the difference between the actual and the required common power component
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH