7.4.2
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
interruptions and anomalies.
1.
Open the front door by lifting the latch from the bottom and turning it to the
right (counterclockwise). Swing the door open.
2.
Make sure that all input and bypass input switches are open.
Note: This is only necessary for the 100/120 kVA units with the optional
MBS and input switches installed.
3.
If the UPSs contain a maintenance bypass switch (MBS), verify that the
MBS is open.
4.
Close all module output breakers (MOBs).
5.
Close all UPS input feeder circuit breakers.
6.
If the UPSs are wired for dual input, close all of the UPS bypass input
feeder circuit breakers.
7.
Close all input and bypass input switches.
8.
Close the neutral switches in 100/120 kVA units.
9.
Close the door and secure the latch.
10. Close the external battery breakers.
11. Wait until the UPS control panel display becomes active and indicates logic
power.
12. Verify that no alarms are active. Notices are not to be misinterpreted as
alarms.
13. Select the CONTROLS symbol in the main menu bar.
The System Control screen is displayed.
14. If not already selected, select UPS in the System Control screen.
15. In the UPS System Control screen, select the LOAD OFF → BYPASS
command and press the
push button.
The critical load is immediately supplied by the bypass source in the
bypass mode from all the UPSs.
The bypass status indicator is illuminated.
16. If the UPS contains an output switch, close the output switch.
Eaton 93E Generation 2 UPS 100-200 kVA
(380/400/415V)
User's and installation guide
©
Eaton Corporation plc 2019. All rights reserved.
Revision: 002
Document ID: P-164000848
97 (118)
