An electrical contactor including {HEAD ~ a control system} for regulating {TAIL ~ the voltage} applied to the contactors coil 
for regulating
An electrical contactor including { HEAD ~ a control system } for regulating { TAIL ~ the voltage } applied to the contactors coil
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH