A VFD is a device used to change the frequency of the alternating:
In which of the following circumstances should a VFD be used?
Which of the following pump performance regulation approaches does not allow for manual nor automatic flow/pressure adjustments?
When a VFD is installed with a pump, what happens if the valve for one irrigation zone is closed and other is open?
To achieve high irrigation efficiency in all types of irrigation, it is important to be able to control the:
A VFD provides soft start and soft stop that helps:
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Q: A VFD is a device used to change the frequency of the alternating:
A: Current
Q: A VFD is a device used to change the frequency of the alternating:
A: Energy
Q: A VFD is a device used to change the frequency of the alternating:
A: Efficiency
Q: In which of the following circumstances should a VFD be used?
A: If an irrigation system has unchanged flow and pressure requirements.
Q: In which of the following circumstances should a VFD be used?
A: If an irrigation system has more than one zone.
Q: In which of the following circumstances should a VFD be used?
A: Most common flood irrigation systems.
Q: Which of the following pump performance regulation approaches does not allow for manual nor automatic flow/pressure adjustments?
A: Throttle control
Q: Which of the following pump performance regulation approaches does not allow for manual nor automatic flow/pressure adjustments?
A: Modifying impeller diameter
Q: Which of the following pump performance regulation approaches does not allow for manual nor automatic flow/pressure adjustments?
A: Speed control
Q: When a VFD is installed with a pump, what happens if the valve for one irrigation zone is closed and other is open?
A: A pressure sensor notifies the VFD to reduce the pressure, and thereby speed of the pump.
Q: When a VFD is installed with a pump, what happens if the valve for one irrigation zone is closed and other is open?
A: The pressure decreases in the zone that is open.
Q: When a VFD is installed with a pump, what happens if the valve for one irrigation zone is closed and other is open?
A: The power consumption increases by almost 50% compared with both zones open.
Q: To achieve high irrigation efficiency in all types of irrigation, it is important to be able to control the:
A: Energy and pressure
Q: To achieve high irrigation efficiency in all types of irrigation, it is important to be able to control the:
A: Flow and energy
Q: To achieve high irrigation efficiency in all types of irrigation, it is important to be able to control the:
A: Flow and pressure
Q: A VFD provides soft start and soft stop that helps:
A: Reduce water consumption.
Q: A VFD provides soft start and soft stop that helps:
A: Eliminate risk of water hammer.
Q: A VFD provides soft start and soft stop that helps:
A: Save up to 20% energy.