Consultation on variable frequency pumps

Regarding variable-frequency pumps, I have a few questions: 1. Is the inverter for the variable-frequency pump built into the motor, or is it installed separately in the power distribution room? 2. Is the voltage of the separate fan provided by the variable frequency pump manufacturer to cool the motor 220V or 380V? How to choose? 3. How is the power of an independent fan generally determined? Should I consult the manufacturer? 4. Does the inverter require a separate power supply? 220V or 380V? ———————————————————————————————————— 1. The frequency converter is located in the power distribution room. 2/220V is available, 380V is also available; choose whichever suits you best. 3. Consult the manufacturer; for motors with low power, the fan power is also very low. 4. Of course, an inverter requires a power supply. Well, it’s usually 380V, right? There are also those with 220V input and 380V output, but those are rare.

If the motor voltage is 380V, should the separate fan be powered by 220V or 380V? What is the difference between choosing the two?

There isn’t much difference. You can choose together with the manufacturer based on your own requirements and the power supply conditions on site. Generally, a fan with a power rating of a few hundred watts is already quite good, as the load is very low