Current Protection - ABB Relion 670 Series Product Manual

ABB
Phasor measurement unit RES670
Pre-configured
Product version: 1.2
Protocol reporting via IEEE 1344 and C37.118
PMUREPORT
The phasor measurement reporting block moves
the phasor calculations into a C37.118 frame
which contains data about PMU configuration,
analog values, binary signal indications and
information about time synchronization quality.
The message generated by the PMUREPORT
function block is set in accordance with the
standard IEEE 1344 protocol for further process.
The phasor measurement reporting block has
settings that allows the user to use one phasor to
report the voltage or a current phasor. There are
also settings for positive or negative sequence
phasors, reporting rate and phasor representation
(polar or rectangular).
Phasor data can be reported to up to 8 phasor
data concentrators over TCP. It is also possible to
use UDP for multicast transmission of phasor
data.

4. Current protection

Four step phase overcurrent protection OC4PTOC
The four step phase overcurrent protection
function OC4PTOC has an inverse or definite time
delay independent for step 1 and 4 separately.
Step 2 and 3 are always definite time delayed.
All IEC and ANSI inverse time characteristics are
available together with an optional user defined
time characteristic.
The directional function is voltage polarized with
memory. The function can be set to be directional
or non-directional independently for each of the
steps.
A 2nd harmonic blocking can be set individually
for each step.
Four step residual overcurrent protection, zero
sequence and negative sequence direction
EF4PTOC
The four step residual overcurrent protection
EF4PTOC has an inverse or definite time delay
independent for each step separately.
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.
EF4PTOC can also be used to provide a system
back-up for example, in the case of the primary
protection being out of service due to
communication or voltage transformer circuit
failure.
Directional operation can be combined together
with corresponding communication logic in
permissive or blocking teleprotection scheme.
Current reversal and weak-end infeed functionality
are available as well.
EF4PTOC can be configured to measure the
residual current from the three-phase current
inputs or the current from a separate current input.
Four step negative sequence overcurrent
protection NS4PTOC
Four step negative sequence overcurrent
protection (NS4PTOC) has an inverse or definite
time delay independent for each step separately.
All IEC and ANSI time delayed characteristics are
available together with an optional user defined
characteristic.
The directional function is voltage polarized or
dual polarized.
NS4PTOC can be set directional or non-
directional independently for each of the steps.
NS4PTOC can be used as main protection for
unsymmetrical fault; phase-phase short circuits,
phase-phase-earth short circuits and single phase
earth faults.
NS4PTOC can also be used to provide a system
back-up for example, in the case of the primary
protection being out of service due to
1MRK 511 266-BEN -
11