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