Introduction
In this control circuit, the 3-phase pump turns on and
off automatically. These circuits are used in heavy industries like chemical
industries, cement industries, mixing industries etc.
Circuit Diagram
Explanation
When the three-phase supply is connected to the 3 phase pump
then the start / stop button remains in off condition if the tank is fully
filled. If the tank is not fully filled then the float switch senses and
connects the supply to the circuit and starts the pump.
The pressure switch is used to analyze pressure of pump
and if the pressure increases with respect to requirement then this switch
controls the pressure.
Advantages
These circuits are operated automatically.
By using this circuit, the tank will never be empty.
This circuit take less power and saves electricity.