Chapter 6—Motor Protection
Power Xpert C445 Global Motor Management Relay
MN042003EN—January 2019
www.eaton.com
129
Motor Protection
The motor protections functions that are listed in this section
monitor motor current (average, minimum, or maximum
phase currents) to detect various motor running faults.
These protections functions may be disabled during a start.
These protections are also disabled if the maximum phase
current is less that 50% of the Motor FLA set-point.
Note:
For protections functions to operate appropriately, the
motor FLA must be configured for the application.
Users can easily customize protection settings in the
protection menu of the Monitoring User Interface or of
Power Xpert
in
Control.
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.
Fault Warnings
Fault Warnings in many cases react to the same parameter
values as Fault trips. Fault Warning events display the fault
information but do not trip the controlled device. Similar to
Fault Trips, Fault Warnings are subject to delay times noted
in Modbus register 1079. This register sets the delay times
for all Fault Warnings in all fault warnings protections.
Table 32. Fault Warnings
Fault Action
Protection
Action
Modbus
Units
Min.
Max.
Default
Fault Warning
Alarm Delay
1079
ms
20
5000
2000
