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