How does VFD / VSD pump inverter protect water pump?

Variable frequency drives (VFD) / variable speed drives (VSD) Constant Pressure Booster Pump Inverter have a built-in circuit breaker that shuts down the motor if the amps get too high for the speed at which the motor is being run. This provides excellent (the best we know of) electrical protection for a motor and the machine it is driving.

It is best to have a Variable frequency drives (VFD) / variable speed drives (VSD) Constant Pressure Booster Pump Inverter that is rated for more horsepower than the motor being driven. This gives more flexibility. However, where electrical overload protection is deemed important, the rating of the actual motor being driven should be loaded into the VFD.

Basically, with a Variable frequency drives (VFD) / variable speed drives (VSD) Constant Pressure Booster Pump Inverter set below 60 Hz, the motor drops maximum horsepower output and instead holds constant torque. Above 60 Hz, the horsepower is limited to the motor nameplate maximum, which means there is a reduction in torque. Some Variable frequency drives (VFD) / variable speed drives (VSD) Constant Pressure Booster Pump Inverter can be set for overload trip on either amps or torque; set it on torque for the best overload protection.

Moreover, with advanced written-in detection logic, a Variable frequency drives (VFD) / variable speed drives (VSD) Constant Pressure Booster Pump Inverter could have All-Around protection as below:

  • Dry running protection
  • Over and low voltage protection

(Acceptable voltage range from 180V to 265V)

  • Over current protection
  • Over pressure protection
  • Excess temperature protection
  • Anti-freezing protection
  • Blocked rotor protection
  • Leakage warning

 

Reference source:

https://vincentcorp.com/content/inverter-vfds-dummies/

 

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VIFIDI Bullet VFD variable speed booster pump inverter