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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

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