DEAR SIRS,

We are Looking for COST-EFFECTIVE, 3-PHASE, 200-kVA, UPS Solution combining:

ONLINE/DOUBLE-CONVERSION and DESIGN FOR HEAVY INDUCTIVE LOADS

APPLICATION:
AVOIDING BIG WATER PUMP 3-PHASE MOTORS ( Typically 150HP @ 440VAC ) TO STOP DURING MOMENTARY GRID FAILURES ( FROM FEW SECONDS TO FEW MINUTES )
As short as five (5) Minutes back-up time could solve 90% of the stopping issues.

TO REDUCE EXPENSIVE SHIPPING COST:
1. -BATTERIES: MUST BE EXTERNALLY INSTALLED, >COMMERCIALLY AVAILABLE< AGM, LiFePO4, OR Li-ion BATTERIES.
2. -ISOLATION TRANSFORMER: WHENEVER FEASIBLE, WE PREFER TO BUY AND INSTALL LOCALLY.

WHICH TOPOLOGY DO YOU RECOMMEND?

COULD HIGH-FREQUENCY, MODULAR UPS BE SUITABLE FOR SUCH APPLICATION?

IS BOOSTING SUPPLY/CHARGER REQUIRED IN THE FIRST CONVERSION ( AC to DC )
TO GET A HIGHER SUITABLE VOLTAGE IN THE DC-BUS?

SHOULD WE BUY >QUITE< EXTRA kVA CAPACITY TO WITHSTAND INDUCTIVE LOADS INRUSH CURRENTS?

IF LOW-FREQUENCY UPS: ANY CHANCE TO LOCALLY BUY AND INSTALL THE ISOLATION TRANSFORMER?

THANK YOU IN ADVANCE FOR ANY SUGGESTIONS AND QUOTES

Best regards,