GE Industrial Solutions Entellisys 4.0 System User Manual - Manual (Page 134)

Reduced Energy Let-Thru Mode 134
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8.3.2 User settings for Multi-Source Ground-Fault
The minimum settings for Multi-Source Ground-Fault zones for both Alarm-Only and Trip
Relays for Topology 0 are:
Pickup Setting
= 30 Amps
Time Delay = BAND 1
Curve I 2 T = DISABLED
Backup Function (For Trip Relay only) = ENABLED
Backup Time Delta (For Trip Relay only) = Trip Immediately
For all MSGF summation zones for both Alarm-Only & Trip Relays for Topology 0
Pickup Setting
= 30Amps
Time Delay = BAND 1
Curve I 2 T = DISABLED
Figure 8-6 Reduced Energy Let-Thru Mode settings for Multi-Source Ground-Fault Relay
NOTE: Although the Pickup is set to 30 Amps, Entellisys automatically enforces a “Zone
Minimum Pickup Setting” for Multi-Source Ground-Fault. The “Zone Minimum Pickup Setting” is
20% of the largest CT rating in the corresponding zone.