ABB REG670 - Synchronization

Function description IEC 61850 identification Function description IEC 61850 identification
Thermal overload
protection, one time
constant
LFPTTR
Fullscheme distance
protection,
quadrilateral for earth
faults
ZMMAPDIS
Loss of voltage check LOVPTUV Fullscheme distance
protection,
quadrilateral for earth
faults
ZMMPDIS
Line differential
protection 3 CT sets,
with inzone
transformers, 2-3 line
ends
LT3CPDIF
Distance protection
zone, quadrilateral
characteristic
ZMQAPDIS
Line differential
protection 6 CT sets,
with inzone
transformers, 3-5 line
ends
LT6CPDIF
Distance protection
zone, quadrilateral
characteristic
ZMQPDIS
Negativ sequence time
overcurrent protection
for machines
NS2PTOC
Distance protection
zone, quadrilateral
characteristic, separate
settings
ZMRAPDIS
Four step directional
negative phase
sequence overcurrent
protection
NS4PTOC
Distance protection
zone, quadrilateral
characteristic, separate
settings
ZMRPDIS
Four step phase
overcurrent protection
OC4PTOC Power swing detection ZMRPSB
Overexcitation
protection
OEXPVPH Mho Impedance
supervision logic
ZSMGAPC
Out-of-step protection OOSPPAM Transformer tank
overcurrent protection
TPPIOC
20.3.2.3 Setting examples for IEC/UCA 61850-9-2LE and time synchronization
The IED and the Merging Units (MU) should use the same time reference especially
if analog data is used from several sources, for example from an internal TRM and an
MU, or if several physical MUs are used. Having the same time reference is important
to correlate data so that channels from different sources refer to the correct phase
angle.
When only one MU is used as an analog source, it is theoretically possible to do
without time synchronization. However, this would mean that timestamps for analog
and binary data/events become uncorrelated. If the IED has no time synchronization
source configured, then the binary data/events will be synchronized with the merging
unit. However, the global/complete time might not be correct. Disturbance recordings
then appear incorrect since analog data is timestamped by MU, and binary events use
the internal IED time. It is thus recommended to use time synchronization also when
analog data emanate from only one MU.
Section 20 1MRK 502 071-UEN -
Station communication
692 Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
Application manual