{HEAD ~ The control voltage} for the three wire configuration is {TAIL ~ the voltage} between the two neutral points 
is
{ HEAD ~ The control voltage } for the three wire configuration is { TAIL ~ the voltage } between the two neutral points
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH