ABB REB500 - End Fault Protection; Mode of Operation

Section 5 1MRK 505 350-UEN
Additional protection options
46 Technical Manual
Distributed busbar protection REB500
5.4 End fault protection
5.4.1 Mode of operation
The end fault protection detects faults between an open circuit-breaker and the CT,
which cannot be cleared by the busbar protection on its own.
Figure 15 Block diagram of EFP with CTs on the line side