The self-coupled step-down starting circuit of avoid main contactor wielding accidents

Published:2011/7/5 20:47:00 Author:Borg | Keyword: self-coupled, step-down, wielding accidents | From:SeekIC

In the circuit, the additional mixed contactors of KM1 and KM2 and the time delay contactor of KT are serially connected as a OR logic circuit. When it is the starting time, KT is taking action, the KM1 and KM2 coil circuit are cut off, KM1 and KM2 additional contactors are reset. Meanwhile, if the main contactors of KM1 and KM2 are wielded, the contactors which are cut off by KM1 and KM2 can cut off the current that cross the transformer coil, so the accident of serious heat or break of TA duo to contactor wielding can be avoided.



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