GE Industrial Solutions Entellisys 5.0 User Manual - Manual (Page 67)

Overcurrent protection 67
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 5-4.
Table 5-5 Ground Fault options
GF Option at
Messenger Switchable GF
Option at
Messenger GF Tripping
Priority
Optioned
(HRG
Systems) GF Trip function
available? Notes
Enabled N/A No Both CPU and
Messenger
• Messenger and CPU perform GF
• CPU at user setting, Messenger at
max
•
GF Alarm is available
•
UL Listed as a GF Device
Disabled Enabled No Both CPU and
Messenger
•
GF Trip must be enabled for GF trip to
operate
• If disabled, GF Trip will not operate at
either the CPU or Messenger
• If enabled, CPU will tell the
Messenger to begin performing GF
(at max setting) while the CPU
performs GF Trip at user settings.
• GF Alarm is available
N/A N/A Yes CPU only • GF protection is always disabled at
messenger for HRG system
• CPU does NOT set GF at the
messenger when GF Tripping Priority
function is optioned in the system
Disabled Disabled No No No GF at Messenger or CPU