Ups Protection System; System Protection Features; System Protection Functions - Toshiba 1600XP SERIES Installation And Operation Manual

22. UPS Protection System

22.1 System Protection Features

The following schematic shows the electrical locations of the protection devices on the UPS.
MCCB
Input
Power
Surge
Absorber
Abnormal

22.2 System Protection Functions

The following charts show the built-in system fault protection functions on all the UPS models.
Protection Item Output Overvoltage
LCD Message
Control malfunction;
Cause
Operation Mode Bypass operation – Chopper and inverter are
After Fault
Audible Alarm
Visible Alarm
Relay Contact
Alarm
Auto-retransfer
46
Overheating
Bypass
Input
Fuse
Line Filter
Batteries
Low Battery
Input
Level
BUILT-IN UPS FAULT PROTECTION FUNCTIONS
Output Undervoltage
OUT-OV
Control malfunction;
EEPROM error Fuse opened; Load issue
stopped
Yes – Continuous buzzer
Red Fault LED on
Fault relay closed
Bypass relay closed
No
Overcurrent
*Static Switch
Output
Fuse
Rectifier/
Inverter
Chopper
+
* Switches are
–
solid state
Negative
devices.
Bus
Overvoltage/
Undervoltage
OUT-UV
Overload – Short circuit at load
Inverter OL: Transfer to bypass;
Bypass OL: Inverter, chopper
See Audible Alarm Functions on
Inverter OL: Fault lamp off
Bypass OL: Fault lamp on
Inverter OL: Bypass relay closed
Bypass OL: Bypass relay open
Inverter OL: Yes if bypass is OK
1600XP Series Installation and Operation Manual
Current Limit
Overload
Isolation
Transformer
Output
Power
Power Flow
Output Overload
OVERLOAD
stopped
page 33
Fault relay open;
Bypass OL: No