UNINTERRUPTIBLE POWER SUPPLY APPARATUS FOR RECEIVING POWER FROM DIFFERENT ELECTRICAL UTILITY CONFIGURATIONS

摘要

PROBLEM TO BE SOLVED: To provide an uninterruptible power supply (UPS) apparatus that can receive power from different electrical utility configurations.SOLUTION: The input stage of the UPS includes a three-phase rectifier bridge design having three legs configured for connection to the different electrical utility configurations. An advantage that may be realized in the practice of some disclosed embodiments of the UPS input stage is that a single UPS can have the flexibility to be used with different electrical utility configurations having different voltages and phases.