Operating Modes; Double Conversion Mode - ABB DPA 250 S4 Operating Manual

4 O P E R AT I N G M O D E S
—

4 Operating modes

—

4.1 Double conversion mode

In double the conversion mode, the load is connected to the UPS Inverter (INV) and the Rectifier is sup-
—
4.1-1: "Double conver-
plied by the main utility supply (L1). The battery remains charged or is under charged. The double con-
sion" operating mode
version mode protect the load from any utility main disturbance or failure.
—
4.1-2: "Inverter Mode"
control panel mimic
When the UPS system is in a double conversion mode, the status of UPS module control panel is dis-
played as follow:
—
4.1-2
In the unlikely event of an inverter fault or overload condition the UPS will transfer the load - automati-
cally and without interruption to the static bypass (transfer time = 0).
—
4.1-1
LED Indicator
Rectifier
Bypass
Battery
Output
Breaker
MBS (Q1)
UPS Output switch (Q2)
27
Color
Green
Green
Green
Green
Status
Open
Closed