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Chapter 8 Operation
UPS operating modes (continued)
Mode
Protection features:
Power surge
Under voltage
Over voltage
Line noise
Frequency variation
Switching transients
Harmonic distortion
Other features:
Frequency conversion
AC source
Note: In High Efficiency mode, the UPS is in Bypass mode and transfers to Battery mode in less than
10 microseconds (ms) when utility power fails. Transfers to High Efficiency (HE) mode will be
active after 5 minutes of Bypass voltage monitoring: if Bypass quality is not in tolerance, then
the UPS will remain in Online mode.
Transferring the UPS between modes
From Online or Battery to Bypass mode. Press any button to activate the menu options, then
select
and
Control
From Bypass to Online or Battery mode. Press any button to activate the menu options, then
select
and
Control
Setting High Efficiency mode
In High Efficiency mode, the UPS is in Bypass mode and transfers to Battery mode in less than
10 microseconds (ms) when utility power fails. Transfers to High Efficiency (HE) mode will be
active after 5 minutes of Bypass voltage monitoring: if Bypass quality is not in tolerance, then
the UPS will remain in Online mode.
Note: High Efficiency Mode is a mode of UPS operation that cuts energy usage and operating costs. In
HE Mode the UPS is running as a Line Interactive UPS – feeding the input to the output loads
and monitoring the input. If the input goes beyond the voltage or frequency ranges, the UPS
will revert back to Online double conversion.
6U Rack or Tower UPS RT8kVA and RT11kVA IUOMG
Online
(continued)
yes
yes
yes
yes
yes
yes
yes
yes
normal
Go to
Bypass.
Go back
normal.
Battery
Bypass
n/a
no
n/a
no
n/a
no
n/a
no
n/a
no
n/a
no
n/a
no
n/a
no
n/a
bypass
Standby
no
no
no
no
no
no
no
no
normal
107
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