Operating The Ups; Operation Modes; Ac Input Mode (Normal Operation) - Toshiba 1400 Series Operation Manual

TOSHIBA
5.0

Operating the UPS

5.1

Operation Modes

5.1.1

AC Input Mode (normal operation)

Power
input
plug
Fuse
5-15P
Power flow in AC input mode for 500, 600, 750, 800, 1000, and 1200
VA Models
Power
input
Circuit
plug
breaker
5-20P
UPS batteries
Power flow in AC input mode for 1500 and 2000 VA Models
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.
Bypass circuit
UPS
main
circuit
+
UPS batteries
_
Bypass circuit
UPS
main
circuit
+
_
5 - 1
receptacles
(rear panel)
Output Xfmr
(Plus Series)
= power flow
Fuse
Output Xfmr
(Plus Series)
= power flow
UPS
5-15R
UPS
receptacles
(rear panel)
5-15R