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9. UPS CHARACTERISTICS
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(1) During normal operation
During normal operation, the UPS automatically switches* to the modes of (a) and (b) below according to the power supply status.
* When the “UPS Operation Mode” in the setting menu is set to “Fixed to Double Conversion”, the mode does not switch.
(a) Double Conversion mode
The UPS switches to Double Conversion mode when the power
supply voltage is outside a set range. In Double Conversion mode, 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 utility power source. The
batteries are kept continually charged by the charger and ready in
case a problem (power outage or voltage drop) occurs with the utility
supply.
(b) Economy mode
The UPS switches to Economy mode when the power supply voltage
is within a set range. In Economy mode, utility power is received and
supplied to the load. The batteries are kept continually charged by the
charger and ready in case a problem (power outage or voltage drop)
occurs with the utility supply.
(2) When utility power fails
When a failure or power outage occurs at the utility power source,
the rectifier and charger stop operating while inverter operation is
started, now using the batteries as a DC source, to ensure stable
power supply to the load without even a momentary power dropout.
At the same time, the buzzer sounds and [INPUT (green)] starts
blinking.
(3) When battery voltage drops
When a failure or power outage at the utility power source continues, the battery voltage drops to approximately 22 V or less*, and
[BATT.LOW (red)] is lit on the display.
*When “Setting the Timing of Low Battery Voltage Signal” in the setting menu is set to “1 minute” or “2 minutes”, a warning occurs
the moment that the remaining battery time reaches the set value.
(4) When utility power recovers
When normal utility power is restored, rectifier and charger operations resume, automatically returning to operation in the normal
operation state described in (1).
(5) Extended power outage
If a power outage persists and the battery voltage reaches the final discharge level, 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, operation is
automatically resumed*, returning to the normal operation state described (1).
*When “UPS Operation Upon Power Recovery” in the setting menu is set to “OFF”, inverter output remains stopped. Additionally,
when the value is set to “30%”, “50%”, or “80%”, operation resumes the moment that the batteries are charged to the set charge
level, and the mode automatically returns to the mode during normal operation indicated in (1) in accordance with conditions.
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(1) Overload protection
When the UPS is operating in Double Conversion mode, in the
unlikely event that 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. Subsequently, the UPS switches the source of power
to the inverter without interruption, and operation returns to the
normal operation state.
*When “Overload Recovery Operation” in the setting menu is set to
“Bypass”, the UPS switches to inverter power supply without
interruption when the overload condition is eliminated.
(2) UPS failure protection
In the unlikely event that the UPS malfunctions, the output selector automatically switches the source of power from the inverter to
the bypass circuit without interruption. [ALARM (red)] lights, and the buzzer sounds. The power supply path is the same as that
when overload occurs.
When a power outage occurs during bypass power supply due to a UPS malfunction, output stops. Contact your sales
representative or SANYO DENKI.
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電源
(商用)
出力
コンバータ
整流器
バッテリ
インバータ
充電器
電源
(商用)
出力
コンバータ
整流器
バッテリ
インバータ
充電器
電源
(商用)
出力
整流器
インバータ
充電器
コンバータ
バッテリ
電源
(商用)
出力
コンバータ
整流器
バッテリ
インバータ
充電器
Utility
power
source
Utility
power
source
Utility
power
source
Rectifier
Rectifier
Rectifier
Charger
Charger
Charger
Converter
Converter
Converter
Battery
Battery
Battery
Inverter
Inverter
Inverter
Output
Output
Output
Utility
power
source
Rectifier
Charger
Converter
Battery
Inverter
Output
