ABB REC650 Product Manual page 18

Bay control REC650 2.2
Product version: 2.2
means, such as binary inputs and SPGAPC function blocks.
The commands can be pulsed or steady with a settable pulse
time.
Automation bits, command function for DNP3.0 AUTOBITS
Automation bits function for DNP3 (AUTOBITS) is used within
PCM600 to get into the configuration of the commands
coming through the DNP3 protocol. The AUTOBITS function
plays the same role as functions GOOSEBINRCV (for IEC
61850) and MULTICMDRCV (for LON).
Single command, 16 signals
The IEDs can receive commands either from a substation
automation system or from the local HMI. The command
function block has outputs that can be used, for example, to
control high voltage apparatuses or for other user defined
functionality.
4. Multipurpose protection
General current and voltage protection CVGAPC
The General current and voltage protection (CVGAPC) can be
utilized as a negative sequence current protection detecting
unsymmetrical conditions such as open phase or
unsymmetrical faults.
CVGAPC can also be used to improve phase selection for
high resistive earth faults, outside the distance protection
reach, for the transmission line. Three functions are used,
which measures the neutral current and each of the three
phase voltages. This will give an independence from load
currents and this phase selection will be used in conjunction
with the detection of the earth fault from the directional earth
fault protection function.
5. Secondary system supervision
Current circuit supervision CCSSPVC
Open or short circuited current transformer cores can cause
unwanted operation of many protection functions such as
differential, earth-fault current and negative-sequence current
functions.
Current circuit supervision (CCSSPVC) compares the residual
current from a three phase set of current transformer cores
with the neutral point current on a separate input taken from
another set of cores on the current transformer.
A detection of a difference indicates a fault in the circuit and
is used as alarm or to block protection functions expected to
give inadvertent tripping.
Fuse failure supervision FUFSPVC
The aim of the fuse failure supervision function (FUFSPVC) is
to block voltage measuring functions at failures in the
secondary circuits between the voltage transformer and the
IED in order to avoid inadvertent operations that otherwise
might occur.
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The fuse failure supervision function basically has three
different detection methods, negative sequence and zero
sequence based detection and an additional delta voltage
and delta current detection.
SEMOD158591-5 v8
The negative sequence detection algorithm is recommended
for IEDs used in isolated or high-impedance earthed
networks. It is based on the negative-sequence quantities.
The zero sequence detection is recommended for IEDs used
in directly or low impedance earthed networks. It is based on
the zero sequence measuring quantities.
M12446-6 v5
The selection of different operation modes is possible by a
setting parameter in order to take into account the particular
earthing of the network.
A criterion based on delta current and delta voltage
measurements can be added to the fuse failure supervision
function in order to detect a three phase fuse failure, which in
practice is more associated with voltage transformer
switching during station operations.
M13083-11 v9
6. Logic
Tripping logic SMPPTRC
A function block for protection tripping and general start
indication is always provided as a basic function for each
circuit breaker. It provides a settable pulse prolongation time
to ensure a trip pulse of sufficient length, as well as all
functionality necessary for correct co-operation with
autoreclosing functions.
The trip function block includes a settable latch function for
the trip signal and circuit breaker lockout.
The trip function can collect start and directional signals from
different application functions. The aggregated start and
directional signals are mapped to the IEC 61850 logical node
M12444-3 v10
data model.
General start matrix block SMAGAPC
The Start Matrix (SMAGAPC) merges start and directional
output signals from different application functions and creates
a common start and directional output signal (
connected to the Trip function.
The purpose of this functionality is to provide general start
and directional information for the IEC 61850 trip logic data
model SMPPTRC.
Trip matrix logic TMAGAPC
The trip matrix logic (TMAGAPC) function is used to route trip
signals and other logical output signals to different output
SEMOD113820-4 v12
contacts on the IED.
The trip matrix logic function has 3 output signals and these
outputs can be connected to physical tripping outputs
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