Multiple Ups Distributed Bypass Operation - Eaton Power Xpert 9395 Installation And Operation Manual

7.5

Multiple UPS Distributed Bypass Operation

This section provides operating instructions for a UPS system containing multiple UPSs in a Distributed Bypass
System configuration.
7.5.1 Starting the Distributed Bypass System in Online Mode
To start the distributed bypass system:
1. Unfasten the front door latches and swing the doors open on all of the UPSs.
2. If the UPSs contain input breakers (CB1), verify that all input breakers are open.
3. Close all Module Output Breakers (MOBs).
4. Close all UPS input feeder circuit breakers.
5. Close all UPS Bypass input feeder circuit breakers.
6. If the UPSs contain input breakers (CB1), close all input breakers.
7 . Close the doors and secure the latches.
8. Observe the UPS control panel displays becoming active, indicating logic power.
9. On any UPS, press the LOCK icon on the main screen. The Sign In screen is displayed. Use operator
password to log in (factory default password is 0101).
10. On the System Status screen, verify the UPS status is OK and the UPM status is OFFLINE.
11. Close all battery breakers.
12. Verify no alarms are active on the Events Log screen.
13. On the System Status screen, select the UPS Controls command.
14. Press the CONTROLS pushbutton on the System Status menu bar. The UPS Control Command screen is
displayed.
15. On the UPS Control Command screen, select GO ONLINE.
If Auto Bypass is enabled (factory default), the critical load is immediately supplied by the bypass source in
Bypass mode from all UPSs, until the inverter turns on and the UPSs transfer to Online mode. The status
indicator on the UPS control panel indicates the UPS is in Bypass mode. If Auto Bypass is not enabled, the
UPS outputs remain off until the UPSs turn on the inverter and close the inverter output contactors.
16. The UPS START UP screen is displayed.
The rectifier and inverter turn on. The inverter continues to ramp up to full voltage.
When the inverter reaches full voltage, the UPS output contactor K3 closes and the static switch turns off.
Power is now supplied to the critical load in Online mode. It takes approximately one minute for the UPS
to achieve Online mode.
The Online status indicator is illuminated. The UPS status indicates ONLINE on the header section of the
screen. The UPM status indicates ONLINE, CHARGING on the MIMIC Screen.
17 . To activate, enable, or disable any of the UPS operational modes, follow the online screen prompts.
® ®
Eaton Power Xpert 9395P-300 (300kVA, 300kW) UPS Installation and Operation Manual
NOTE A Field Installed UPM (FI-UPM) is always designated as UPM 4.
NOTE To obtain any system information, follow the on screen prompts to get to the proper
screen. The operator cannot inadvertently cause a system dump or disconnect
unless they override a warning pop-up. Value or information screens DO NOT affect
system operation
P-164000563—Rev 04 www.eaton.com/powerquality
UPS Operating Instructions
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