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UPS Protection System
System Protection Features
The following schematic shows the electrical locations of the protection devices on the
1600EP models.
M CCB
Input
power
Surge
absorber
Input
Abnormal
System Protection Functions
The following charts show the built-in UPS system fault protection functions on all the
1600EP models.
Protection Item
LCD Message
Cause
Operation
Mode After
Fault
Audible Alarm
Visible Alarm
Relay Contact
Alarm
Auto-retransfer
TOSHIBA
Bypass
Input
fuse
Rectifier/
Line Filter
Chopper
Batteries
Low Battery
Level
Built-In UPS Fault Protection Functions
Output overvoltage
Output undervoltage
OUT-OV
Control malfunction;
Control malfunction;
chip error
Bypass operation;
Chopper and inverter are stopped
Yes; continuous buzzer
Red Fault LED "on"
Faulty relay closed;
Bypass relay closed
No
Overcurrent
*Static
switch
Output
fuse
Inverter
+
*Switches are
solid state
_
devices
Overheating
OUT-UV
wire disconnected
Inverter OL: Transfer to bypass;
See 'Audible Alarm Functions' on
Inverter OL: Bypass relay closed
Bypass OL: Bypass relay open
Inverter OL: Yes if bypass is OK
Bypass OL: No
43
Current Limit
Overload
Isolation
Transform er
Line Filter
Power flow
Overvoltage/
Undervoltage
Output overload
OVER LOAD
Overload;Short circuit at load
inverter stopped
Bypass OL: inverter, chopper
and bypass stopped
page 24
Inverter OL: no fault lamp
Bypass OL: fault lamp "on"
Fault relay open;
Output
power
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