{HEAD ~ The current} in the inductor is measured, and, by applying {TAIL ~ an appropriate constant} of proportionality, the exciting current of the current transformer is determined 
is measured by applying
{ HEAD ~ The current } in the inductor is measured , and , by applying { TAIL ~ an appropriate constant } of proportionality , the exciting current of the current transformer is determined
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH