Pump Controls control electric motors that power mechanical pumps. A Pump Control Panel includes power components to control the pump motor, sensors to protect the pump, and pilot devices for operator control. Additional sensors are used to monitor the process for automatic pump operation.
- Some pump controls are simple and pre-packaged with the pump for retail purchase like sump pumps. Shop Google for Sump Pumps
- Others pump controls are more complicated and must be designed to meet specified process control and customer requirements.
Protecting the pump and the pump motor are priorities because a pump failure can have serious consequences. At a minimum make sure the motor and pump don’t overheat and the pump doesn’t run dry. Design the pump control panel based on the application and customer requirements.
A Pump Control Panel has to know the status of process variables required to control and protect the pump. This means it has to connect to devices that are monitoring the process.
- Motor Overloads – Pump Protection for when the pump motor current is above its Full Load Amp rating.
- Temperature Sensors – Pump Protection when the pump or motor are above their Temperature rating.
- Level Sensors – Pump control and protection to insure the pump doesn’t run dry
- Flow Sensors – Used to verify the pump is moving fluid
- Pressure Sensors – Used for pump control and to adjust speed
- Start and Stop pumps based on the following
- Level Sensors, or
- Pressure Sensors, or
- Flow Sensors
- Control pumps using the following
- Fixed Speed (Small) – Use an Across the Line Motor Starter
- Fixed Speed (Large) – Use a Solid State Soft Starter (Prevent Water Hammer)
- Variable Speed – Use a Variable Frequency Drive (Pressure or Flow control)
A Pump Control Panel has to give an Operator the ability to turn the power on and off, control the process, and monitor the process and status of all alarms as needed.
- Main Power
- Main Power Disconnect
- Pump Controls
- System Off-On Selector, and / or
- Manual-Off-Auto Selector, if used
- Level or Pressure Setpoint, if used
- Speed, if used
- Running Status light, and
- Alarm Status lights, and
- Level or Pressure, if used
- Speed, if used