Battery Backup Mode - Toshiba 1400 Series Operation Manual

5.0 Operating the UPS
5.1 Operation Modes (Cont'd)
5.1.2

Battery Backup Mode

Power
input
plug
Fuse
5-15P
Power flow in battery backup mode for 500, 600, 750, 800, 1000, and 1200
VA Models
Power
input
Circuit
plug
breaker
5-20P
UPS batteries
Power flow in battery backup mode for 1500 and 2000 VA Models
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 changes
(inverts) 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's 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 page 5-6 (See Section 5.4
for battery backup time) shows (Vmin).
Bypass circuit
UPS
main
circuit
+
UPS batteries
_
Bypass circuit
UPS
main
circuit
+
-
5 - 2
receptacles
(rear panel)
Output Xfmr
(Plus Series)
= power flow
Fuse
Output Xfmr
(Plus Series)
= power flow
TOSHIBA
UPS
5-15R
UPS
receptacles
(rear panel)
5-15R