ABB RELION 670 Series Product Manual page 23

Bay control REC670 2.1 IEC
Single point generic control 8 signals SPC8GAPC
The Single point generic control 8 signals SPC8GAPC
function block is a collection of 8 single point
commands, designed to bring in commands from
REMOTE (SCADA) to those parts of the logic
configuration that do not need extensive command
receiving functionality (for example, SCSWI). In this way,
simple commands can be sent directly to the IED
outputs, without confirmation. Confirmation (status) of
the result of the commands is supposed to be achieved
by other means, such as binary inputs and SPGAPC
function blocks. The commands can be pulsed or steady
with a settable pulse time.
AutomationBits, command function for DNP3.0
AUTOBITS
AutomationBits 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. Differential protection
High impedance differential protection, single phase
HZPDIF
High impedance differential protection, single phase
(HZPDIF) functions can be used when the involved CT
cores have the same turns ratio and similar magnetizing
characteristics. It utilizes an external CT secondary
current summation by wiring. Actually all CT secondary
circuits which are involved in the differential scheme are
connected in parallel. External series resistor, and a
voltage dependent resistor which are both mounted
externally to the IED, are also required.
The external resistor unit shall be ordered under IED
accessories in the Product Guide.
HZPDIF can be used to protect tee-feeders or busbars,
reactors, motors, auto-transformers, capacitor banks
and so on. One such function block is used for a high-
impedance restricted earth fault protection. Three such
function blocks are used to form three-phase, phase-
segregated differential protection.
ABB
5. Current protection
SEMOD176462-4 v8
Instantaneous phase overcurrent protection PHPIOC
The instantaneous three phase overcurrent function has
a low transient overreach and short tripping time to
allow use as a high set short-circuit protection function.
Four-step phase overcurrent protection OC4PTOC
The four step three-phase overcurrent protection
function OC4PTOC has an inverse or definite time delay
independent for step 1 to 4 separately.
All IEC and ANSI inverse time characteristics are
available together with an optional user defined time
characteristic.
SEMOD158591-5 v7
The directional function needs voltage as it is voltage
polarized with memory. The function can be set to be
directional or non-directional independently for each of
the steps.
A second harmonic blocking level can be set for the
function and can be used to block each step individually.
Instantaneous residual overcurrent protection
M12446-6 v5
EFPIOC
The Instantaneous residual overcurrent protection
EFPIOC has a low transient overreach and short tripping
times to allow the use for instantaneous earth-fault
protection, with the reach limited to less than the
typical eighty percent of the line at minimum source
impedance. EFPIOC is configured to measure the
residual current from the three-phase current inputs and
can be configured to measure the current from a
separate current input.
Four step residual overcurrent protection, zero
sequence and negative sequence direction EF4PTOC
M13071-3 v13
The four step residual overcurrent protection EF4PTOC
has an inverse or definite time delay independent for
each step.
All IEC and ANSI time-delayed characteristics are
available together with an optional user defined
characteristic.
EF4PTOC can be set directional or non-directional
independently for each of the steps.
IDir, UPol and IPol can be independently selected to be
either zero sequence or negative sequence.
Second harmonic blocking can be set individually for
each step.
EF4PTOC can be used as main protection for phase-to-
earth faults.
1MRK 511 361-BEN D
M12910-3 v12
M12846-3 v16
M12701-3 v14
M13667-3 v18
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