TOSHIBA
16
5.0
Operating the UPS
5.2
System Protection Features
The schematic shown below depicts the electrical locations of the protection devices
on the 2000 VA 120V UPS model.
Input
Bypass
Rectifier/
Charger/
Chopper
Inverter
Input
Xfmr
Batteries
Output 2
Output 3
Output 4
MCCB
2
3
4
MCCB1
Overcurrent
Input
Abnormal
Overvoltage/
Undervoltage
Current Limit
Overload
Overheating
Low Battery
Level
The schematic shown below depicts the electrical locations of the protection
devices on the 2000VA 230V UPS model.
Input
Bypass
Rectifier/
Charger/
Chopper
Inverter
Input
Xfmr
230V
Batteries
Output 2
Output 3
Output 4
MCCB
2
3
4
MCCB1
Overcurrent
Input
Abnormal
Overvoltage/
Undervoltage
Current Limit
Overload
Overheating
Low Battery
Level
Note:
The three UPS rear panel output receptacles are supplied from the UPS inverter
section through separate 20A breakers (10A for the 230V model). Thus, an
overload on one of the receptacle sets can cause a loss of power to it while the
other receptacle sets remain 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 breaker.
Output
Xfmr
230V
Power flow
Power flow
+
-
+
-
