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