Pump Controls control the electric motors that power mechanical pumps. Pump controls include electric components to power the motor, sensors to protect the motor and pump, and field sensors to monitor the process to control pump operation.
- Some pump controls are simple and pre-packaged with the pump for retail purchase like sump pumps. Find these here Shop Google for Sump Pumps
- Others are more complicated and must be designed to meet specified process control and customer packaging requirements.
Pump Controls • the Basics
Pump protection and motor protection are pump controls priorities because a pump failure can have serious consequences. At a minimum make sure the motor and pump don’t overheat and the pump does not run dry. The design and cost of a pump control panel is based on the application and customer specification.
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 – Control and protection insurance the pump is moving fluid
- Pressure Sensors – Used for pump control and to adjust speed
- Start and Stop the pump based on
- Level Sensors, or
- Pressure Sensors, or
- Flow Sensors
- When pumps are designed to operate at one speed
- Use a Motor Starter to control the Pump
- When a pump is designed to operate within a defined speed range.
- Use a Variable Speed Drive for speed control
Pump Control Panels have 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 Disconnect
- 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