Dear,
We have a Variable speed pump located in an underground pit, the purpose is to perform the following
1- When the level is high, the pump will need to run at a maximum allowable frequency
2- When the level is low, the pump will need to run at the minimum frequency
However, we have flow constrain in order frequent start/stopping of the pumps. flow should vary between 2.7 LPS and 4.2 LPS.
I was thinking of controlling the VFD based on level using a PI loop and at the same time measure the flow in order not to allow it to go below 2.7 LPS or above 4.2 LPS.
What kind of control shall use in order to maintain the pump running within the needed flow range
thank you!!!
We have a Variable speed pump located in an underground pit, the purpose is to perform the following
1- When the level is high, the pump will need to run at a maximum allowable frequency
2- When the level is low, the pump will need to run at the minimum frequency
However, we have flow constrain in order frequent start/stopping of the pumps. flow should vary between 2.7 LPS and 4.2 LPS.
I was thinking of controlling the VFD based on level using a PI loop and at the same time measure the flow in order not to allow it to go below 2.7 LPS or above 4.2 LPS.
What kind of control shall use in order to maintain the pump running within the needed flow range
thank you!!!