The four kinds of starting devices of submersible pump are discussed.
Submersible pump start-up device mainly include direct start device, Y type star triangle step-down starter, auto voltage step-down starter and frequency step-down starter four, here the author mainly of the four kinds of the functions and characteristics of the initiating device, a brief introduction.
1. Direct start device.
Directly start device is suitable for small power and submersible pumps submersible motor starting device is composed of contactor, relay and other components, on the submersible motor and in the operation of the submersible electric pump overload, open phase, locked-rotor and under-voltage abnormal running state, and can be equipped with the stator winding overheating protection, etc. Stainless steel chemical pump
2. Ya-c startup device.
The star Angle step-down actuator is also suitable for large submersible motors and submersible pumps. The starting device consists of two sets of contactors and relays, which can be used to start the submersible motor and submersible pump. It can also protect the abnormal operating conditions of the submersible motor and the submersible pump operation, such as overload, fault phase, plugging and underpressure. It can also automatically control the operation of submersible pump according to the change of liquid level or pressure. And can be equipped with stator winding overheating, bearing overheating, motor internal or oil indoor water and other special protection.
3. Self-coupling step-down startup device.
Auto voltage step-down starting device is suitable for large power and submersible pumps, submersible motor starter except by the contactor, relay and other components, and within the control panel is equipped with a self coupling transformer, step-down starting of submersible motor and submersible pump; It can protect the abnormal running state of the submersible motor and the submersible pump in operation, such as overload, fault phase, plugging and underpressure. It can automatically control the operation of the submersible pump according to the change of liquid level or pressure; The well can be equipped with stator winding overheat, bearing overheating, motor internal or oil indoor water inlet and other special protection.
4. Variable frequency energy saving control starting device.
The submersible pump is powered by a variable preset speed energy saving device, which has the following advantages:
(1) water supply system can be run automatically according to the need of water supply: after setting pressure of water supply, water supply system according to the set pressure automatically adjust the rotation speed and running the Numbers of submersible pumps, water supply system running in high efficiency and energy saving optimization condition.
(2) the water supply system can automatically adjust the water supply pressure of the system, keep the water supply pressure constant, and avoid the large fluctuation of water supply pressure.
(3) it adopts the soft starting of the frequency conversion device to eliminate the shock current at the starting time and extends the service life of the equipment.
(4) perfect protection function: control device with overload, over-current, locked-rotor, overvoltage and overheating protection, such as fault occurs in the operation of submersible pump, the control protection device will automatically stop submersible pump work, and alarm output; The system has the functions of self-check, fault diagnosis, fault memory, fault display and automatic starting backup pump.
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