GE Industrial Solutions Entellisys System User Manual - Manual (Page 56)

Single point functions 56
5
There are two options configured at each Messenger for Ground Fault. The combinations of
Ground Fault options are listed in Table 5-5 below.
The parameters for the GF protection provided by the Entellisys CPU can be set in the HMI as
shown in Figure 5-3.
Figure 5-3 Event generated for IOC trip
Table 5-5 Ground Fault options
GF Option at
Messenger Switchable GF
Option at
Messenger Settings at CPU UL Listed as a
GF Device? Notes
Enabled Don’t Care NA – CPU must
have GF trip
function Yes Messenger and CPU perform GF; CPU at
user setting, Messenger at max
Disabled Enabled Ground Fault Trip No CPU performs GF at user setting. On
power up, Messenger does not perform
GF. CPU must tell Messenger to begin
performing GF (at max setting).
Disabled Enabled Ground Fault
Alarm Only No CPU performs GF alarm function at user
settings, Messenger does not perform GF
Disabled Enabled Ground Fault OFF No No GF at Messenger or CPU
Disabled Disabled Ground Fault OFF No No GF at Messenger or CPU