Eaton Powerware 9390 Installation And Operation Manual

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Contents

UPS Operating Instructions10-9EATON Powerware® 9390 UPS (20–80 kVA) Installation and Operation Manual S 164201603 Rev 1 www.powerware.com10.2.2 Starting the Parallel System in Bypass ModeIf the inverter output of the UPMs is not available and the critical load needs to beenergized, perform the following procedure:C A U T I O NIn Bypass mode, the critical load is not protected from commercial power interruptions andabnormalities.1. Close all UPM input feeder circuit breakers.2. If the UPMs are dual feed, close all UPM Bypass input feeder circuit breakers.3. Observe all UPM control panel displays becoming active, indicating logic power.4. Press the CONTROLS pushbutton on the main menu bar of any UPM. The SystemControls screen appears on each UPM.5. On the System Controls screen of each UPM, the power module (PM) statusshould indicate SHUTDOWN.6. Press the BYPASS pushbutton on the System Controls menu bar of any UPM.The critical load is immediately supplied by the bypass source, in Bypass mode.7. The UPMs are now operating in Bypass mode and the BYPASS status indicator oneach UPM is illuminated.