TOSHIBA
13
Input
Power
MCCB1
MCCB
2
3
4
CHP
INV
Batteries
Bypass circuit
Power
Flow
Input
Power
MCCB1
MCCB
2
3
4
CHP
INV
Batteries
Power
Flow
+
-
+
-
Bypass circuit
5.0
Operating the UPS
5.1
Operation Modes
5.1.1
AC Input Mode (normal operation)
Input
Xfmr
Power flow in AC input mode for the 2000VA 230V BLACK GOLD TB Model
Both of the above illustrations show circuit power flow in the ac-input mode.
The UPS unit’s rectifier, included in a boost chopper circuit, converts ac input
power to dc power. This dc power runs the unit’s transistor inverter and charges
the batteries. The boost chopper circuit maintains a constant voltage, with
current limiting, for charging the batteries and assures proper sine waveform
generation for the output current. The unit’s batteries are maintained in a
constantly charged state when the UPS is in the normal operation mode.
On the front panel, LED’s labeled “AC LINE” and “INVERTER” should be on and
the “FAULT” LED should be off (See Section 5.4 Front Panel Layout).
Input
Xfmr
(230V)
Output
Xfmr
(230V)
Power flow in AC input mode for the 2000VA 120V BLACK GOLD TB Model
