Load Protection; Table 49. Undercurrent; Table 50. Low Power - Eaton Power Xpert C445 User Manual

Chapter 6—Motor Protection

Load Protection

Power-based protections provide superior protection for load-
based conditions such as a dead-headed or starved pump.
Users can easily customize protection settings in the
protection menu of the Monitoring User Interface or of
Power Xpert inControl.
To enable/disable individual trip and warning protections,
navigate to Protections R General R Trip Enable / Warning
Enable.
To customize protection levels and delays for each protection
feature, navigate to the category of that protection in
Protections R Current / Voltage / Power / Frequency /
Ground Fault
Undercurrent
The Undercurrent protection monitors the average current of
the motor and will trip the motor if the unbalance drops
below the set threshold. The Undercurrent protection is
active when the motor is in the Running state.

Table 49. Undercurrent

Fault
Code Protection Action
14 Undercurrent Fault Trip
Fault Warning
Low Power
The Low Power protection monitors the kW consumed
(supply side) by the load and will trip the motor if the
measured value is lower than the set threshold. The Low
Power protection is active when the motor is in the Running
state. The rated power is calculated from the rated HP input
by the user.

Table 50. Low Power

Fault
Code Protection Action
16 Low Power Fault Trip
Fault Warning
138 Power Xpert C445 Global Motor Management Relay MN042003EN—January 2019 www.eaton.com
Fault Action
Modbus Units Min.
1021 % FLA 10
1022 % FLA 10
Fault Action
Modbus Units Min.
1049 % 0
1050 % 0
Delay (Seconds)
Max. Default Min.
90 50 1
90 50 1
Delay (Seconds)
Max. Default Min.
200 50 1
200 50 1
Max. Default Modbus
60 20 1023
60 2 1079
Max. Default Modbus
60 20 1051
60 2 1079