Operating The Ups; Operation Modes; Ac Input Mode (Normal Operation) - Toshiba Black Gold TB Series Operation Manual

5.0

Operating the UPS

5.1

Operation Modes

5.1.1

AC Input Mode (normal operation)

MCCB1
Input
Power
Input
Xfmr
Power flow in AC input mode for the 2000VA 120V BLACK GOLD TB Model
MCCB1
Input
Power
Input
Xfmr
(230V)
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).
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
13