Eaton Power Xpert C445 - Active Fault, Warning and Inhibit Values

Chapter 6—Motor Protection
130 Power Xpert C445 Global Motor Management Relay MN042003EN—January 2019 www.eaton.com
Motor Thermal Overload
The Overload function models the thermal characteristics of
a motor and generates a Fault Trip event that de-energizes
the motor before motor damage will occur. This is intended
to protect the motor and power wiring from excessive
current. Trip curves are defined by applicable agency
standards. The trip class for any particular Overload class is
user adjustable.
Table 33. Overload
Instantaneous Overcurrent
The Instantaneous Overcurrent protection monitors the
maximum phase current of the motor and will trip the motor
if the current exceeds the set threshold. The Instantaneous
Current protection is active when the motor is energized but
does have a separate Start delay to account for high starting
currents that are characteristic of high efficiency induction
motors.
Table 34. Instantaneous Overcurrent
Fault
Code
Default
Status
Fault Action Delay (Seconds)
Protection Action Units Note Min. Max. Default Min. Max. Default
19 Thermal Overload Fault Trip Enabled amps C445MA2P2… 0.3 2.4 0.3 Class 5 Class 40 Class 5
C445MA005… 151Class 5Class 40Class 5
C445MA032… 4 32 4 Class 5 Class 40 Class 5
C445MA045… 6 45 6 Class 5 Class 40 Class 5
C445MB072… 9 72 9 Class 5 Class 40 Class 5
C445MC090… 11 90 11 Class 5 Class 40 Class 5
C445MC136… 17 136 17 Class 5 Class 40 Class 5
C445…ext ext 800 ext Class 5 Class 40 Class 5
Fault Warning Disabled % 1 100 90
Overload Reset
Threshold
% C445… 1 99 75
Fault
Code Modbus
Fault Action Settings Delay (Seconds)
Protection Action Units Min. Max. Default Min. Max. Default Modbus
7 Instantaneous
Overcurrent
Fault Trip 1012 % FLA 50 400 400 1 2000 2000 1015
Fault Warning 1013 % FLA 50 400 400 200 5000 2000 1079
Fault Trip Delay At powerup 0 18000 0 1014