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