Accurexhomevoltageprotector.com

https://www.accurexhomevoltageprotector.com/product-page/accurex-cx-6010-three-phase-automatic-changeover-with-voltage-protection

This scenario with one of our clients, it's a commercial space about 1500 feet... A wine store.
There was 100 volts continuously in one of the phases for two days, our unit Accurex CX 6010 model promptly cut off that abnormal phase and fed power supply from healthy phase.
In absence of this unit they Would have had to run the generator continuously for two days to run nearly ten refrigerators.
It saved them nearly thousands of rupees on Genset fuel