Eaton 93E UPS 15-80 kVA (380/400/415 V) Installation and Operation Manual
© Eaton Corporation plc 2015. All rights reserved. Revision: 001
Document ID: 614-01975-00
108 (133)
7.4 Multiple UPS parallel operation
This section provides operating instructions for a UPS system containing
multiple UPSs.
WARNING
Do not use the internal Maintenance Bypass Switch (MBS) in UPSes
that are installed as a parallel system.
NOTE: Refer to the External Battery Cabinet Installation Manual for the
EBC battery breaker location.
Start and control the system wide function from UPS 1.
7.4.1 Starting the parallel UPS in the bypass mode
If the inverter output of the parallel UPS is not available and the critical
load needs to be energized:
CAUTION
In the bypass mode, the critical load is not protected from commercial
power anomalies.
1. Make sure that the system maintenance bypass switch is open.
2. Close all UPS input feeder circuit breakers.
3. Close all module output breakers (MOBs).
4. If the UPSs are wired for dual input, close all of the UPS bypass
input feeder circuit breakers.
5. Make sure that all the rectifier input switches are closed.
6. Make sure that all the bypass input switches are closed.
7. Make sure that all the output switches are closed.
8. Close the internal and external battery breakers.
9. Wait until the UPS control panel display becomes active and
indicates logic power.
10. Check that there are no alarms active.
11. Select the
symbol in the main menu bar.
The System Control screen is displayed.
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