Load Protection; Table 51. Undercurrent; Table 52. Low Power - Eaton Power Xpert C445 User Manual

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 51. 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 52. Low Power

Fault
Code Protection Action
16 Low Power Fault Trip
Fault Warning
Fault Action
Modbus Units
1021 % FLA
1022 % FLA
Fault Action
Modbus Units
1049 %
1050 %
Power Xpert C445 Global Motor Management Relay MN042003EN—October 2016 www.eaton.com
Min. Max. Default
10 90 50
10 90 50
Min. Max. Default
0 200 50
0 200 50
Chapter 6—Motor Protection
Delay (Seconds)
Min. Max. Default
1 60 20
1 60 2
Delay (Seconds)
Min. Max. Default
1 60 20
1 60 2
Modbus
1023
1079
Modbus
1051
1079
147