Y-connection motor protection circuit

Published:2012/8/11 1:35:00 Author:Ecco | Keyword: Y-connection , motor , protection | From:SeekIC

In the circuit shown as the figure, pressing the ST will make KM coil get electric and pull in; loosening ST will allow the KM to get self-protection, then motor M runs. When one phase of three-phase alternating current circuit is dieconnected, then motor's midpoint will generate potential difference. The voltage will be rectified and stabilized to make relay K be energized, then the power of M is cut to to protect the motor stator windings from burning. The circuit is suitable for motors with power lowering than 7.5kW.



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