Battery Backup Mode - Toshiba Black Gold TB Series Operation Manual

5.0 Operating the UPS
5.1 Operation Modes (Contd.)
5.1.2

Battery Backup Mode

MCCB1
Input
Power
Input
Xfmr
Power flow in battery backup mode for the 2000VA 120V BLACK GOLD TB
Model
MCCB1
Input
Power
Input
Xfmr
(230V)
Power flow in battery backup mode for the 2000VA 230V BLACK GOLD TB
Model
The above illustrations show power flow during the battery backup mode.
When commercial ac power failures occur, the UPS's batteries instantly begin
supplying dc voltage to the UPS's main inverter circuit. This circuit will change
(invert) the dc power into ac power. The ac power is available at the unit's
output receptacles. This back-up process will continue until the UPS battery
voltage drops below a specific minimum level. When this occurs, the batteries
will stop supplying power to the load. This minimum level is the rated minimum
voltage (Vmin). The rated battery voltage chart on pages 5-6 (See Section 5.7
for battery backup time) shows (Vmin). On the front panel, LED's labeled
"AC LINE" and "FAULT" should be off. The "INVERTER" LED should be on
(See Section 5.4 Front Panel Layout).
TOSHIBA
Bypass circuit
CHP INV
+
-
Batteries
Bypass circuit
CHP INV
+
-
Batteries
MCCB
2
3
4
Power
Flow
MCCB
2
3
Output
Xfmr
4
(230V)
Power
Flow
14