Table 2. Bay protection functions of line variant L-V2 (optional)
Bay protection function Line variant
Main functionality IEEE REB500 IEC61850 L-V2 L-V4
Distance protection 21 DIST PDIS ● ●
Definite time over and undercurrent protection 51 OCDT PTOC ● ●
Inverse time overcurrent protection 51 OCINV PTOC ● ●
Directional overcurrent definite time protection 67 DIROCDT PTOC ● ●
Directional overcurrent inverse time protection 67 DIROCINV PTOC ● ●
Definite time over and undervoltage protection 59/27 OVDT PTOV ● ●
Synchrocheck 25 SYNC RSYN ○ ●
Autoreclosure 79 AR RREC ○ ●
Direct. sensitive EF prot. for grounded systems 67N DIREFGND PTOC ● ●
Inverse time earthfault overcurrent protection 51N I0INV PTOC ● ●
Three-phase current plausibility 46 CHKI3PH PTOC ● ●
Three-phase voltage plausibility 47 CHKU3PH PTOV ● ●
Peak value over and undercurrent protection 50 OCINST PTOC ● ●
(● included, ○ not included)
2. Main features
Low-impedance busbar protection
GUID-DF357102-9D61-4A95-8EF1-D9C8CF30389D v1
• High functional reliability due to two independent
measurement criteria:
– stabilized differential current algorithm
– directional current comparison algorithm
• Short tripping times independent of the plant’s size or
busbar configuration
• Phase Segregated measurement
• Stub and T-zone protection
• Reduced CT performance requirements
– High through-fault stability even in case of CT
saturation
– No switching of CT circuits
Modular and flexible architecture
GUID-7E40CABA-17B1-40E8-ABE7-2FF61A7C5256 v2
• Multiple modes of installation
– Centralized layout:
Installation of bay units and central unit in one or
several cubicles
– Distributed layout:
Bay units distributed with short connections to CTs,
isolators, circuit breakers, and so on.
• Interference-proof connections between bay units and
central unit by fiber-optic cables (max. 2000 m)
• Replacement of existing busbar protection schemes
without restrictions, for example, in case of
substation extensions
• Easily extensible
• Only one hardware version for
– Settable 1 A and 5 A rated current inputs
– Nominal frequencies of 50 Hz and 60 Hz
• Minimum number of spare parts needed due to
standardization and low number of varying units
Seamless substation automation integration
GUID-002CFE05-C550-40AE-BFDF-91B150C04295 v2
• User-friendly, PC-based interface (HMI)
• Operator integration into PCM600 for readout of
configuration, events and disturbance records
• Communication with substation monitoring and
control system
– via IEC61850-8-1 Edition 1 or Edition 2
– via IEC60870-5-103
• Local HMI with comprehensive system information on
every unit
Distributed busbar protection REB500
1MRK 505 402-BEN B
ABB 7
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