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1600XP/XPi Series Installation and Operation Manual – 60616-012
23. UPS Protection System
23.1 UPS Protection Devices
The following schematic shows the electrical locations of the protection devices on the UPS.
23.2 UPS Protection Devices Fault Response
The following charts show the UPS response to common faults.
UPS FAULT PROTECTION FUNCTIONS
Protection Item
Output Overvoltage Output Undervoltage
Output Overload
LCD Message
VOOV
VOUV
OL110
Cause
Control malfunction;
EEPROM error
Control malfunction;
Fuse opened; Load issue
Loading that exceeds design
parameters
Operation Mode
After Fault
Bypass operation – Chopper and inverter are
stopped
Inverter OL: Transfer to bypass;
Bypass OL: Inverter, chopper
stopped
Audible Alarm
Yes – Continuous buzzer
See Audible Alarm Functions on
page 33
Visible Alarm
Red Fault LED on
Inverter OL: Fault lamp off
Bypass OL: Fault lamp on
Relay Contact
Alarm
Fault relay closed
Bypass relay closed
Fault relay open;
Inverter OL: Bypass relay closed
Bypass OL: Bypass relay open
Auto-retransfer
No
Inverter OL: Yes if bypass is OK
Bypass OL: No
Input
Abnormal
Low Battery
Level
Overheating
Overcurrent
Current Limit
Overload
Overvoltage/
Undervoltage
Output
Power
Line Filter
Inverter
*Static Switch
Isolation
Transformer
Input
Power
Input
Fuse
Power Flow
Bypass
* Switches are
solid state
devices.
MCCB
Output
Fuse
Surge
Absorber
Batteries
+
–
Rectifier/
Chopper
Negative
Bus
Optional
TVSS
Summary of Contents for 1600XP SERIES
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