System Protection Features - Toshiba 1400 Series Operation Manual

5.0 Operating the UPS
5.2

System Protection Features

The schematic shown below depicts the electrical locations of the protection devices
on the 500, 600, 750, 800, 1000, and 1200 VA UPS models.
Power
Input
input
abnormal
plug
Fuse
5-15P
The next schematic shown below depicts the electrical locations of the protection
devices on the 1500 and 2000 VA UPS models.
Input
Power
abnormal
input
plug
Circuit
breaker
Battery
5-20P
Notes:
1) The UPS's RECT/CHOPPER and INVERTER, although separate electrical
circuits, are physically located on the same heat sink. This is applicable to all
models.
2) The two UPS rear panel output receptacles are supplied from the UPS inverter
section through separate 15A output fuses (applies to the 1500 and 2000 VA
model only). Thus, an overload on one of the receptacle sets can cause a loss
of power to it while the other receptacle set remains active. If all of the UPS
indicator lights appear normal and power is not available at one of the receptacle
sets, check the associated output fuse.
IGBT
+
Battery
-
Low
battery IGBT
level
IGBT
+
-
Low battery
level IGBT
5 - 4
Bypass
Current limit
Over-
Overload
IGBT
current
Capacitor
Overvoltage
Undervoltage
IGBT
Capacitor
Overheating
Bypass
Current limit
Over- Overload
IGBT
current
Capacitor
Overvoltage
Undervoltage
IGBT
Capacitor
Overheating
TOSHIBA
UPS
receptacles
(rear panel)
5-15R
UPS
receptacles
(rear panel)
Fuse
5-15R