Patent ID: 11955833
Assignee: SCHNEIDER ELECTRIC IT CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 30:
31. A method for controlling an uninterruptible power supply (UPS) having an input coupled to and configured to receive input power from a circuit breaker, an output coupled to and configured to provide output power to a load, and an energy-storage-device interface coupled to and configured to receive back-up power from an energy-storage device, wherein the circuit breaker is a main circuit breaker configured to provide a first portion of a current through the circuit breaker to the input and a second portion of the current through the circuit breaker to at least one branch circuit breaker, the method comprising:
determining whether the current through the circuit breaker meets at least one over-current criterion;
controlling, responsive to determining that the current through the circuit breaker meets the at least one over-current criterion, the uninterruptible power supply to provide the output power to the load, the output power being derived from the input power and the back-up power;
determining whether a current through the at least one branch circuit breaker meets at least one second over-current criterion; and
controlling, responsive to determining that the current through the at least one branch circuit breaker meets the at least one second over-current criterion, the uninterruptible power supply to provide the output power to the load, the output power being derived from the input power and the back-up power.