ABB BRC300 SPBRC300 Controller
• Three-phase current and three-phase voltage plausibility
Main 2 / back-up bay protection:
Line protection
• High-speed distance protection
• Directional sensitive earth fault protection
for grounded systems against high resistive faults in solidly grounded networks
• Directional sensitive earth fault protection
for ungrounded or compensated systems
• Autoreclosure for
- single-pole / three-pole reclosure
- up to four reclosure sequences
• Synchrocheck with
- measurement of amplitudes, phase
angles and frequency of two voltage
vectors
- checks for dead line, dead bus, dead
line and bus
Group 1 / back-up bay protection:
Transformer protection
• High-speed transformer differential protection for 2- and 3-winding and auto-transformers
• Thermal overload
• Peak value over- and undercurrent protection
• Peak value over- and undervoltage protection
• Overfluxing protection
• Rate of change frequency protection
• Frequency protection
• Independent T-Zone protection with transformer differential protection
• Power protection
Application REB500
The numerical busbar protection REB500 is
designed for the high-speed, selective protection of MV, HV and EHV busbar installations
at a nominal frequency of 50, 60 and 16.7 Hz.
The structure of both hardware and software
is modular enabling the protection to be easily
configured to suit the layout of the primary
system.
The flexibility of the system enables all configurations of busbars from single busbars to
quadruple busbars with transfer buses, ring
busbars and 1½ breaker schemes to be protected.
In 1½ breaker schemes the busbars and the
entire diameters, including Stub/T-Zone can
be protected. An integrated tripping scheme
allows to save external logics as well as wiring.
The capacity is sufficient for up to 60 feeders
(bay units) and a total of 32 busbar zones.
The numerical busbar protection REB500
detects all phase and earth faults in solidly
grounded and resistive-grounded power systems and phase faults in ungrounded systems
and systems with Petersen coils.
The main CTs supplying the currents to the
busbar protection have to fulfil only modest
performance requirements (see page 18). The
protection operates discriminatively for all
faults inside the zone of protection and
remains reliably stable for all faults outside the
zone of protection

The REB500sys is foreseen in MV, HV and
EHV substations with nominal frequencies of
16.7, 50 Hz or 60 Hz to protect the busbars
and their feeders. The bay protection func tions included in REB500sys are used as
Main 2 / Group 1 - or back-up protection.
The system REB500sys is foreseen for all sin gle or double busbar configurations (Line vari ants L-V1 to L-V7 and Transformer variant T V1 to T-V4). In 1½ breaker configurations,
variant L-V5 can be used for the bay level
functions autoreclosure and synchrocheck.
The capacity is sufficient for up to 60 feeders
(bay units) and a total of 32 busbar zones.
The REB500sys detects all bus faults in sol idly and low resistive-grounded power sys tems, all kind of phase faults in ungrounded
and compensated power systems as well as
feeder faults in solidly, low resistive-grounded,
compensated and ungrounded power sys tems.
The protection operates selectively for all
faults inside the zone of protection and
remains reliably stable for all faults outside the
zone of protection.
REB500sys is perfectly suited for retrofit con cepts and stepwise upgrades. The bay unit is
used as a stand-alone unit for bay protection
functions (e.g. line protection, autoreclosure
and synchrocheck or 2- and 3 winding trans former protection or autonomous T-zone pro tection). The central unit can be added at a
later stage for full busbar and breaker failure
protection functionality