What is the three-level control in the turnout starting circuit?
Hierarchical control of turnout control circuit. The first level control is the excitation circuit of 1DQJ, the second level control is the pole-turning circuit of 2DQJ, and the third level control is the excitation circuit of DCJ or FCJ. Through these three-level control circuits, the control and monitoring of turnout action can be realized. In which 1DQJ is pulled up, and the switching action circuit is turned on after 2DQJ turns the pole. The front contact of 1DQJ is connected in series in the action circuit of its 1-2 coil, and the circuit automatically shuts down after checking the normal operation of the motor. After the switch is turned to the bottom, the action circuit is cut off through the action contact of the automatic switch in the switch machine, so that the action circuit is restored and 1DQJ drops.