Patent ID: 6100605
Filing Date: 2000-08-08
Classification: H02J

Abstract:
An uninterruptible power supply, comprising:an input with line, neutral and safety ground conductors connectable with a corresponding three line power supply of a power utility;an output with line, neutral and safety ground conductors connectable with a load;a first switch coupled in switching relationship with said line conductor at said input;a second switch coupled in switching relationship with said neutral conductor at said input;said first and second switches being responsive to a control input condition to open circuit said line conductor and said neutral conductor at said input;an inverter connected to said line conductor intermediate said first switch and said output and connected to said neutral conductor intermediate said second switch and said output;a battery power supply electrically connected to said invertor;a third switch coupled in switching relationship between said neutral conductor and said safety ground of said uninterruptible power supply and actuable into a closed circuit condition in response to a neutral bonding input condition; anda control circuit in electrical communication with said inverter having a standby mode providing for the delivery of power from said power supply of said power utility through said first and second switches to said load, and responsive to an anomaly in said power supply of said power utility to derive said control input condition and said neutral bonding input condition and enter into a backup mode to deliver battery derived power from said inverter to said load.