Sanyo SANUPS A11J, Instruction Manual

Page: 46 / 52

UPS Characteristics
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(1) When normal operation
During normal operation, the UPS converts AC power from
the utility power source into DC power through the rectifier,
and reconverts this DC power back into AC power through
the inverter and supplies it to the load. The output power is
stable AC power synchronized with the input power source.
The batteries are kept continually charged and ready in case
a problem (power outage or voltage drop) occurs with the
utility supply.
When the UPS is in the normal operation state, (DOUBLE
CONVERSION Mode) is displayed on the main screen of the
power management software.
(2) When failure of utility power
When a failure or a power outage occurs at the utility power
source, the rectifier and charger stop operating while
inverter operation continues, now using the batteries as a
DC source to produce AC voltage, to ensure stable power
supply to the load without even a momentary power dropout.
At the same time, the buzzer sounds the battery operation
alarm, and “Green INPUT” starts blinking.
(3) When battery voltage drops
When a failure or a power outage at the utility power source continues, the battery voltage drops to approximately
178 V or less, the buzzer sounds, and “
Batt Vol Low
” is displayed on the LCD screen.
(4) When recovery of utility power
When normal utility power is restored, rectifier and charger operations resume, automatically returning to the
normal operation state described in §14.1 (1).
(5) Extended power outage
If a power outage persists and the battery voltage reaches the final discharge level of approximately 168 V, a
protective circuit shuts off the inverter to prevent over-discharging of the batteries. When normal utility power
recovers after the inverter has been stopped automatically, operation is automatically resumed*, returning to the
normal operation state described in §14.1 (1).
* When “UPS Operation Upon Power Recovery” in the LCD panel setting menu is set to “STOP,” inverter output
remains stopped.
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(1) Overload protection
If the UPS output is overloaded by the current capacity of the
inverter being exceeded, such as when a computer system
boots up, the output selector automatically switches the
source of power from the inverter to bypass circuit without
interruption. Once the overload state is resolved, the source
of power is switched to the inverter, and operation returns to
the normal operation state.
* When “Overload Recovery Operation” in the LCD panel
setting menu is set to “
Auto Ret BYP,
” the UPS switches the
source of power to the inverter without interruption when
the overload is resolved, and operation returns to the
normal operation state.
(2) UPS failure protection
If a failure occurs in the UPS, the output selector automatically switches the source of power from the inverter to
the bypass circuit without interruption. At the same time, “Red ALARM” lights and the buzzer sounds. The power
supply route is the same as for an overload.
Output from the UPS will stop if a power outage occurs during bypass operation due to a UPS failure. Contact your
supplier or SANYO DENKI.
Utility
power
Output
O
u
tput
s
e
le
ct
or
sw
itch
Rectifier
(converter)
Charger
Inverter
Batteries
Utility
power
Output
O
u
tput
s
e
le
ct
or
sw
itch
Rectifier
(converter)
Charger
Inverter
Batteries
Utility
power
Output
Out
put
s
e
le
ct
or
swi
tc
h
Rectifier
(converter)
Charger
Inverter
Batteries