Patent ID: 6977446
Filing Date: 2005-12-20
Classification: H02J

Abstract:
1. A method of supplying uninterruptible electrical power to a critical load and electrical power to a non-critical load, comprising: providing a critical inverter for the critical load; providing a functionally separate non-critical inverter for the non-critical load; during normal operation, supplying electrical power from a generator set to both said critical inverter and said non-critical inverter through a rectifying power supply, and supplying electrical power from a utility grid to said non-critical load; during utility grid failure, disconnecting the non-critical inverter from the rectifying power supply so as to provide the entire power output from the generator set to the critical inverter through the rectifying power supply; and during generator set shut down, providing utility grid power to said non-critical inverter to supply power to said critical inverter for the critical load.