ABB Relion REB500 Product Manual page 11

ABB
Distributed busbar protection REB500
Product version: 8.2
MOSFET technology and offer an improved trip-time
performance.
A software logic enables the input and output channels to
be assigned to the various functions. A time stamp is
attached to all the data such as currents, voltages, binary
inputs, events and diagnostic information acquired by a
bay unit.
Where more analog and binary inputs are needed, several
bay units can be combined to form a feeder/bus coupler
bay (e.g. a bus coupler bay with CTs on both sides of the
bus-tie breaker requires two bay units).
The bay unit is provided with local intelligence and
performs local protection (e.g. breaker failure, end fault,
breaker pole discrepancy) as well as the event and
disturbance recording.
In the event that the central unit is out of operation or the
optical fiber communication is disrupted an alarm is
generated. The bay unit will continue to operate and all
local protection as well as the recorders (event and
disturbance) will remain fully functional (stand-alone
operation).
The hardware structure is based on a closed, monolithic
casing and presented in two mounting solutions:
· Without LHMI: ideal solution if convenient access to all
information via the central unit or by an existing
substation automation system is sufficient.
· With LHMI and 15 programmable LEDs (Figure 7): ideal
solution for distributed and kiosk mounting (AIS), since
all information is available in the bay.
For this option it is possible to have the LHMI either
built in or connected via a flexible cable to a fixed
mounting position.
Additional plug-and-play functionality
Bay units can be added to an existing REB500 system in
a simple way. Due to the modular and flexible architecture
of the software, integration of new units is easily achieved.
In the event of a failure, a bay unit can be easily replaced.
During system startup the new bay unit requests its
address, this can be entered directly via its LHMI. The
necessary setting values and configuration data are then
downloaded automatically.
Figure 7. Bay Unit
Central unit (500CU04)
The hardware structure is based on a closed, monolithic
casing.
The central unit is the system manager, i.e. it configures
the system, contains the busbar replica, assigns bays
within the system, manages the sets of operating
parameters, acts as REB500 process bus controller,
assures synchronization of the system and communicates
with the station control and monitoring system.
The variables for the busbar protection function are
derived dynamically from the process data provided by the
bay units.
The process data is transferred to the central processor
via the REB500 process bus interface. The central unit is
able to handle data from up to 60 bay units and evaluate
up to 32 bus zones.
In addition to processing the protection zone data, the
central unit provides a disturbance recorder for all 32 bus
zones, recording the main data of the busbar protection to
facilitate quick fault analysis.
The central unit offers 9 binary inputs and 19 binary
outputs for central commands and signals (e.g. external
bus zone trip, trip-reset etc.). Additional 9 binary inputs
and 9 binary outputs are optional available.
The central unit comprises a local HMI with 15
programmable LEDs (Figure 8) including a front Ethernet
port for HMI connection within the local area network.
Figure 8. Central Unit
1MRK 505 352-BEN
Issued: 2016-03-01
Revision: -
11