Bypass mode
In the event of a UPS overload or internal failure, the UPS powers your equipment
directly from utility power. Battery mode is not available and your equipment is
not protected; however, the utility power continues to be passively filtered by the
UPS. The
indicator illuminates.
Depending on overload conditions, the UPS remains in Bypass mode for at least 5
seconds and will stay in this mode if three transfers to Bypass occur within 20
minutes.
The UPS transfers to Bypass mode when:
v
the user activates Bypass mode through the front panel
v
the UPS detects an internal failure
v
the UPS has an overtemperature condition
v
the UPS has an overload condition listed in the
Specifications
section
Note:
The UPS stops operating after a specified delay for overload conditions
listed in the
Specifications
section. However, the UPS remains on to alarm the fault.
Standby mode
When the UPS is turned off and remains connected to the AC source, the UPS is in
Standby mode (
indicator). Depending if Bypass Standby setting is enabled, the
output is powered but not protected. The battery packs recharge when necessary
and the communication ports are powered.
Operating modes: summary
The following table summarizes the characteristics of your UPS unit in each
operating mode.
Table 1. Operating modes
Mode
Online
Battery
Bypass
Standby
Load
powered
powered
powered
no power
Batteries
charging
discharging
charging
charging
Protection features:
Power failure
yes
n/a
no
no
Power sag
yes
n/a
no
no
Power surge
yes
n/a
no
no
Under voltage
yes
n/a
no
no
Over voltage
yes
n/a
no
no
Line noise
yes
n/a
no
no
Frequency variation
yes
n/a
no
no
Switching transients
yes
n/a
no
no
Harmonic distortion
yes
n/a
no
no
Other features:
Frequency conversion
yes
n/a
no
no
Chapter 5. Operation
29
Summary of Contents for 5594-5KX
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