Inputted to the control circuit 225 are output signals of current transformers 226 and 227 for detecting {HEAD ~ the currents} flowing to {TAIL ~ the terminals} P and A 
flowing to
Inputted to the control circuit 225 are output signals of current transformers 226 and 227 for detecting { HEAD ~ the currents } flowing to { TAIL ~ the terminals } P and A
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH