14
Residual Ground Fault
Safety Manual
MN042004EN March 2017 www.eaton.com
Residual Ground Fault
The Residual Ground Fault protection monitors the ground
current of the motor and will trip the motor if the ground cur-
rent exceeds the set threshold. The Ground Fault protection is
always active.
Protections —> Ground Fault —> Residual GF
Ground Fault
Fault
Code
Fault
Action Units
Delay (Seconds)
Protection
Action
Modbus
Frame
Min.
Max.
Default Min.
Max.
Default
Modbus
4
Ground Fault
(earth)
Fautl Trip
1060
amps
C445MA2P4... 0.12
2.4
1
1
60
5
1063
C445MA005... 0.25
5
3
C445MA032... 1
9.6
3
C445MA045... 1
13.5
3
C445MB072...
3
21.6
3
C445MC090...
3
27
3
C445MC136...
34
40.8
34
C445M...EXT
30%
of CT
Primary
50%
of CT
Primary
50%
of CT
Primary
Fault
Warning
1061
2
1079
Fault Trip
Delay
At
powerup
0
5
0
1062
Use Fault
Trip Inhibit
1064
Disable
Enable
Disable
Fault Trip
Inhibit Run 1065
%
25
100
50
0
0
0
Ú
If the C445 relay is commissioned to monitor an
AC motor, the current must be fed on all three
poles in order to prevent early tripping. DC motors
cannot be monitored.
WARNING
IMPROPER FAULT DETECTION
Residual Ground fault will not protect people from harm
caused by ground current .
Ground fault thresholds must be set to protect the
motor and related equipment .
Ground fault settings must conform to national and
local safety regulations and codes .
Failure to follow these instructions can result in death
or serious injury .