Undervoltage and overvoltage protection for pump controllers- Taizhou Soyue Electronic Technology Co.Ltd

Undervoltage and overvoltage protection for pump controllers

2022-06-16

1. What is the pump underpressure and overpressure?

All electrical equipment has a rated voltage, but is not actually guaranteed to work at the rated voltage. It is close to the rated voltage range, which is generally required to be ±15%. To protect electrical equipment and workmanship, if the voltage is lower than -15%, it is "undervoltage". When the working voltage is lower than the voltage, the protection action will be taken and the power will be cut off. Conversely, if the voltage exceeds 15%, the voltage is "overvoltage". "Overvoltage" is a non-fatal failure of electrical equipment.

2. What are the consequences of undervoltage and overvoltage?

The insulation of the motor is mainly realized by insulating materials, and the insulation size is limited by the geometric space. When the motor exceeds the dielectric strength and voltage value of the electrical appliance, it is easy to cause insulation breakdown. Appliances can heat up, get punctured, burn out, catch fire, and even cause accidents. When the voltage is too low, the output torque of the motor is reduced by a square factor. It may cause the motor to stall and overheat, or even burn. Therefore, the working voltage range of the motor is very narrow, and overvoltage and undervoltage protection must be installed.

3. How does the dominant controller protect the pump when the pump is under undervoltage protection and overvoltage protection?

In the dominant controller, when the actual operating voltage is lower or higher than the calibration voltage, the pump is in under/over voltage protection. In this case, the Pump Controller will try to restart the pump every 5 minutes (programmable time) until the line voltage returns to normal.