Rules for Installing a Frequency Converter on a Pump
When installing a frequency converter on a pump motor, it is necessary to adjust the drive to gradually accelerate the motor from zero RPM to the maximum necessary over a certain period. This allows for a smooth start of water movement in the pipes and also a smooth stop during the shutdown of the pump. Furthermore, the operation of the pumps can be automatically restored after power outages, and they can also be started remotely using the frequency converter or a radio signal from a PLC.
Key Concepts When Using Pumps
Several key points to remember:
- Starting and Stopping the Pump: it is always necessary to perform this with the valve closed;
- Efficient Operation: the pump should operate at the point that corresponds to its maximum efficiency on the characteristic curve;
- Motor Power: it must be properly matched to avoid overloading the pump impeller;
Installing a Check Valve
A check valve should be installed on the discharge side of the pump after the main valve. This will help reduce the back pressure of water that may occur due to a sudden shutdown of the pump as quickly as possible. Do not allow uncontrolled water pressure to create a load on the pipes or the pump's spiral casing.