GE Industrial Solutions Entellisys 4.0 System User Manual - Manual (Page 89)

Single Point Relay protection 89
5
Operational limitations
Location may not find the faulted feeder under the following conditions:
• Load Currents above 1X (Overload)
• High Z fault (insufficient pulse current)
• Multiple feeders faulted
• Other rapid transient currents (i.e. motors starting every fraction of a second)
• Network (parallel) applications may not locate for mains and ties
• Minimum pulse current not met
• Breaker is in a reverse power condition
Figure 5-12 HRGF Detection and Location process - w/ optional trip enabled
5.2.9.1 Hardware Requirements
The system must be a High Resistance grounded system with HRGF detection and have either
redundant or non-redundant discrete I/O