Toshiba 5000 SERIES Installation And Operation Manual page 60

EPO (Emergency Power Off) Function
These units are equipped to accept a remote-mounted EPO switch only.
The remote EPO feature enables quick shutdown of the UPS AC output and battery circuits.
The EPO function is initiated by pressing the EPO switch. The effect of using the EPO switch is the same
whether the UPS is in the AC Input Mode, Battery Backup Mode, or the Bypass Mode.
The Figure 13-2 shows the UPS condition after application of the EPO switch. See Section 13.6
Restore System Power after an EPO Shutdown.
5000 UPS
AC Input
3Φ 4W
MCCB
TRIPPED
Ground
Wire
50
Bypass Thyristor
Contactor
SYNC
Fuse
OFF
Input
AC/DC
Contactor
Converter Inverter
OFF
DC/DC
Converter
FIGURE 12-3: EFFECT OF EPO ACTIVATION
5000 Series NEMA-3R 3-Phase UPS Installation and Operation Manual – 92975-000
Fuse
OFF
Output
DC/AC
Contactor
AC Output
3Φ 4W