Thus, the third or tertiary winding always presents a minimum load on {HEAD ~ the transformer} to positively ensure {TAIL ~ safety} at all times 
to positively ensure
Thus , the third or tertiary winding always presents a minimum load on { HEAD ~ the transformer } to positively ensure { TAIL ~ safety } at all times
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH