Chapter 6—Motor Protection
Power Xpert C445 Global Motor Management Relay
MN042003EN—January 2019
www.eaton.com
117
Overview of Protection Features
In general, motor protection features will be controlled by a
number of user settable parameters. The possible
parameters are as follows.
●
Fault Trip Enable—Any Fault Trip can be turned ON or OFF.
●
Fault Trip Level—Level of a measurement element that will
begin the timing of the delay (start or run).
●
Fault Trip Delay—These delays prevent momentary
disturbances in the system from causing nuisance trips by
allowing the C445 to “ride though” temporary Fault Trip
events.
●
Fault Warning Enable—Any trip warning can be turned ON
or OFF.
●
Fault Warning Level—Level of a measurement element
that will begin the timing of the delay (start or run).
●
Fault Warning Delay—This delay parameter prevents
momentary disturbances in the system from causing
nuisance Fault Warning messages. One parameter is used
for all Fault Warnings. Note that Fault Warnings will expire
when the fault condition(s) is no longer active.
●
Start Delay—An option on selected protection types that
will inhibit a fault trip condition during the motor starting
cycle.
The Fault Trip and Fault Warning protective functions are
organized into 4 categories:
●
Current Based
●
Voltage Based
●
Power Based
●
Advanced Protection and Monitoring Algorithms
●
Voltage Loss Restart
●
Motor Torque
●
Motor Efficiency
●
Energy Deviation
