Best VFD for AC motor

The retrofit kit replaces the existing internal components of the SAMI STAR VFD. By reusing as much of the existing ancillary electrical and mechanical components such as cabinets and cabling, the retrofit kit typically costs less than replacing the complete VFD and cabinet.
The benefits of such a retrofit kit include lower capital expenses, reduced engineering costs, lower labor costs, no production losses and quick project execution.
Don`t forget the motor
The decision to replace, upgrade or retrofit a VFD will be usually the result of either: stricter production or process requirements calling for existing VFD replacement; a complete failure of the VFD, making it irreparable; or the original manufacturer unable to support the product with spares.
Whichever project type is being undertaken, getting payback on VFD installations is much easier now than it was when the sites were built, as energy prices have gone up while the prices of VFDs have fallen to about a quarter of what they used to be 20 years ago.
When replacing an VFD, the motor should also be considered. The typical life of a motor is 15 to 20 years, so if the VFD is due for renewal, so is the motor. New motors are more efficient than older ones and are better suited to working with VFDs.
In many countries, financial incentives are available to support the installation of VFDs where these are used for energy-saving purposes. Across Europe, governments are introducing tax incentives that enable companies to offset the entire cost against tax in the year of purchase. This has made VFDs more affordable and is a VFDr for change in the water and wastewater industry.