Multiple Ups Distributed Bypass Operation; Starting The Distributed Bypass System In Online Mode - Eaton Power Xpert Plus 1 Installation And Operation Manual

UPS OPERATING INSTRUCTIONS
7.4

Multiple UPS Distributed Bypass Operation

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Power Xpert 9395 UPS (450–550 kVA) Installation and Operation Manual
The paragraphs in this section provide operating instructions for a UPS system
containing multiple UPSs.
NOTE A Field Installed UPM (FI-UPM) is always designated as UPM 4.
7.4.1

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 (see
Figure 4‐2 on page 4-4).
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
Status screen is displayed.
10. On the System Status screen, verify the UPS status is SHUTDOWN and the UPM
status is SHUTDOWN.
11. Close all battery breakers.
12. Verify no alarms are active.
13. On the System Status screen, select the
14. Press the
CONTROLS
Control Command screen is displayed.
15. On the UPS Control Command screen, select
16. Press the
SELECT
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 transfer to Online mode.
pushbutton on the main menu bar. The System
CONTROLS
UPS
pushbutton on the System Status menu bar. The UPS
pushbutton on the UPS Command menu bar.
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command.
.
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