Agricultural submersible pump anti-theft alarm

Published:2011/8/9 0:05:00 Author:Felicity | Keyword: anti-theft alarm, agricultural submersible pump | From:SeekIC

When the switch Q turns and the pump havn’t been started,the power transformer T is on.And the induced current produced by the secondary winding goes through the normally open contact of the AC contactor KM, the start-up button,and the stator winding of motor m to form a circuit. And then relay K switches on ,and the normally open contact releases to cut off the power circuit of coil KM and alarm HA. When the line is cut because of the pump being stolen or somehow,the power circuit of relay K will be cut off and its normally close contact closes and HA send alarm.



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