The electrical contactor 8, wherein {HEAD ~ said controller} generates {TAIL ~ said pulse width modulated signal} at a frequency of approximately 2 KHz 
generates
The electrical contactor 8 , wherein { HEAD ~ said controller } generates { TAIL ~ said pulse width modulated signal } at a frequency of approximately 2 KHz
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH