Home » English riddles » Wiring and Cabling » Wiring Riddle No.3 – Auto-transfer switching control diagram » Reply To: Wiring Riddle No.3 – Auto-transfer switching control diagram Reply To: Wiring Riddle No.3 – Auto-transfer switching control diagram 2021-08-03 at 11:08 am #2976 Hamid Yes, Q11 and Q12 in above circuit diagrm are contactor.
