Deep well water pumps commonly used in three start and control circuits

Submersible pumps commonly used in the three start and control circuits, Deep well water pump motor control and protection of common lines and start as follows.
(1) With the autotransformer step-down start control protection circuit (Figure 2-1) Start, close the power switch, turn on the power, press the start button, contactor 3KM power, its contacts will autotransformer When the time relay delay time, through the middle relay 2KB disconnect the contactor 3KM and 2KM, while making the contactor 1KM (1KM), the contactor 2KM and the time relay K energized, the motor starts to start, Power, the rated voltage to the normal operation of the motor, then start the signal light 2HL off, running lights 1HL light.
For oil-filled wells with submersible motors, when the oil pressure in the pressure-holding device is exhausted, the signal contact of the lean-oil protection is actuated and the oil-lean signal is issued, and the contactor is interrupted by the intermediate relay 1 KB. Oil-type motor stops working, at this time, lights 3HL light.
The use of autotransformer step-down start control protection circuit for any connection with the wells with submersible motors, use a wide range.
(2) start using a star-delta protection control circuit (Figure 2-2) start, close the power switch, turn on the power, lights HLG. Press the start button S. , The contactor KM energizes and makes the contactor K2 and the time relay K3 energize, the main contact of the contactor K2 connects the starter with the submarine motor stator winding, the electric motor starts the depressurization to start, starts the signal lamp HLY to be bright at the same time; When the time relay extends , The contactor K2 is disconnected and the contactor K1 is energized. At this time, the main contact of the contactor K2 is opened first, and then the main contact of the contactor K1 is closed to transfer the stator windings of the submersible motor into triangles Normal operation under the connection, lights HLY, HLG off, running lights HLR light.
When the submersible motor is overloaded, the control switch FR is closed and the control power is cut off by the intermediate relay K. The contactors KM and Ki are de-energized and the main power is turned off. The motor is stopped and the signal lamp HLR is off. The signal lights HLY, HLG light.
Star-delta control of the start of a protective control device easy to control, low cost, for delta connection, power larger, with double cable leads to the wells with submersible motor.
(3) wells with submersible motors commonly used control and protection devices for oil-filled wells with submersible motor, with the oil-poor signal action circuit commonly used control and protection devices are GKD type and XKD type, XKQ type. Applicable to water-filled or dry well submersible motor, and has a water level automatic control function of the common control and protection devices are JBXQ type.