Toshiba 4200FA Manual De Usuario
TOSHIBA
59
6.0 UPS Protection System
6.1
System Protection Features
The preceding one-line schematic illustrates the electrical locations of the protection devices
on all UPS models.
on all UPS models.
6.2
System Protection Functions
The following chart shows the built-in UPS fault protection functions on all models.
Built-in UPS Fault Protection Functions
Protection Item
Inverter Over-voltage
(IVOV)
Inverter Under-voltage
(IVUV)
UPS Overload
LCD Message
INVERTER
OVERVOLTAGE
INVERTER
UNDERVOLTAGE
OUTPUT OVERLOAD
Cause
Control Malfunction; Feedback Error
Overload or short circuit at the load.
Operation Mode
after Fault
Bypass Operation; Chopper and Inverter Stopped
Inverter Overload: Transfer to bypass; Inverter
stopped.
Bypass Overload: Inverter, Chopper, and Bypass
stopped.
stopped.
Bypass Overload: Inverter, Chopper, and Bypass
stopped.
Audible Alarm
Yes: See Audible Alarm Functions
Visible Alarm
Red Fault Lamp “on”
Inverter OL: No Fault Lamp
Bypass OL: Fault Lamp “on”
Relay Contact
Alarm
Fault Relay closed; Bypass Relay closed
Inverter OL: Bypass Relay closed
Bypass OL: Bypass Relay open and Fault relay
closed
Auto-Retransfer
No
Inverter OL: Yes, if bypass ok
Bypass OL: No
Protection Item
Low Battery Voltage
(Level-1)
Low Battery Voltage
(Level-2)
Inverter Output Current Limit
LCD Message
Line-4 will read
“BATTERY LOW”
DC UNDERVOLTAGE
OUTPUT OVERLOAD
Cause
Battery Discharge
Battery Shutdown Level
reached
Load Inrush current
Operation Mode
after Fault
Battery Discharge
Shutdown:
No Output
If Bypass ok, transfer to bypass; if not, current-limit
mode
mode
Audible Alarm
Yes: See Audible Alarm Functions
Visible Alarm
Battery Lamp Flickers
NO
NO
Relay Contact
Alarm
Low Battery Relay
closed
Bypass Relay closed
Auto-Retransfer
No
Yes, if bypass ok
Input
Power
Power
Isolation
Transformer
Model
Transformer
Model
MCCB
Converter
Inverter
Output
Power
Power
Bypass
MBS
Chopper
Batteries
Input
Abnormal
Abnormal
Overcurrent
Low Battery
Overheat
Overload
Over-voltage/
Under-voltage
Under-voltage