![background image](http://html.mh-extra.com/html/eaton/power-xpert-c445/power-xpert-c445_user-manual_525145148.webp)
Chapter 6—Motor Protection
134
Power Xpert C445 Global Motor Management Relay
MN042003EN—January 2019
www.eaton.com
Undervoltage
The Undervoltage protection monitors the minimum phase
voltage of the motor and will trigger a fault if the voltage
drops below the set threshold. The Undervoltage protection
is active when the motor is in the Running state. When the
Low Voltage Start Inhibit Enable is set, the Undervoltage will
prevent a start into an under voltage condition as determined
by the Undervoltage Start Inhibit Level.
Table 41. Undervoltage
Overvoltage
The Overvoltage protection monitors the maximum phase
voltage of the motor and will trip the motor if the voltage
exceeds the set threshold. The Overvoltage protection is
active when the motor is in the Running state.
Table 42. Overvoltage
Fault
Code
Modbus
Fault Action
Delay (Seconds)
Protection
Action
Units
Min.
Max.
Default
Min.
Max.
Default
Modbus
1
Undervoltage
Fault Trip
1028
%
10
100
90
1
60
20
1031
Fault Warning
1029
%
10
100
90
0.2
5
2
1079
Start Trip Delay
Delay Fault Trip at Startup
0
60
20
1030
Fault
Code
Modbus
Fault Action
Delay (Seconds)
Protection
Action
Units
Min.
Max.
Default
Min.
Max.
Default
Modbus
2
Overvoltage
Fault Trip
1025
%
90
150
110
1
60
20
1027
Fault Warning
1026
%
90
150
110
0.2
5
2
1079