Characteristic Of Ups; Basic Operation - Sanyo Denki SANUPS E11A Series Instruction Manual

§ 1 7 . C h a r
§ 1 7 . C h a r
§ 1 7 . 1 B a s i c O
§ 1 7 . 1 B a s i c O
(1) Normal operation
In normal operation, the UPS switches automatically* between the three modes (a) to (c) depending on the state of the
power.
The UPS does not switch to the other mode from "Double Conversion" mode, when "UPS Operation Mode" in the
※
user setting is set to "Double Conversion".
(a) Active Filter mode
The UPS operates in Active Filter mode when the input
power voltage is within a certain range and the output power
factor is below a certain value. In Active Filter mode, the UPS
receives power from the utility power source and supplies it
to the load. At the same time, it compensates for high
frequencies in the input power at the inverter. The batteries
are kept continually charged and ready in case a problem
(outage or voltage drop) occurs in the utility supply.
(b) Double Conversion mode
The UPS switches to Double Conversion mode when the
input power voltage is outside a certain 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 input power source.
The batteries are kept continually charged and ready in case
a problem (outage or voltage drop) occurs in the utility
supply.
(c) Economy mode
The UPS switches to Economy mode when the input power
voltage is within a certain range and the output power factor
is above a certain value. In Economy mode, the UPS receives
power from the utility power source and supplies it to the
load. At the same time, the inverter is connected to the load
and ready to activate. The batteries are kept continually
charged and ready in case a problem (outage or voltage drop)
occurs in the utility supply.
(2) On failure of utility power
When a fault or an outage occurs in the utility power source,
the rectifier and charger cease 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 the
"Green INPUT" indicator starts blinking.
(3) Upon recovery of utility power
When normal utility power is restored, rectifier and charger operations resume automatically, returning to the normal
operating state described in §17.1 (1).
(4) When battery voltage declines
When low voltage or an outage in the utility power source continues, causing the
battery voltage to decline to about value (1.85 V/cell) in the right table, the "Red
BATT.LOW" indicator lights to indicate low battery voltage.
* When "Low Battery Voltage Warning Timing" in the user setting menu is set to "2
minutes" or "3 minutes", the alarm is issued at the point when the remaining battery
time drops to the specified level.
(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 automatically, operation is automatically resumed, returning to the normal operating state described in §17.1
(1).
* When "UPS Operation Upon Power Recovery" in the user setting menu is set to "OFF", inverter output remains
stopped. When it is set to "30%", "50%", or "80%", the UPS restarts operation once the batteries are charged to the
specified level and then returns to the normal operating state described in §17.1 (1).
a c t e r i s t i c
a c t e r i s t i c
p e r a t i o n
p e r a t i o n
o f U P S
o f U P S
Utility
power
Rectifier
Utility
power
Rectifier
Utility
power
Rectifier
Utility
power
Rectifier
Characteristics
Inverter
Converter
Charger
Batteries
Inverter
Converter
Charger
Batteries
Inverter
Converter
Charger
Batteries
Inverter
Converter
Charger
Batteries
Model Batter voltage
E11A102 approx.22V
E11A152 approx.33V
E11A202 approx.44V
E11A302 approx.55V
Output
Output
Output
Output
44