Hitachi Relion 670 Series Applications Manual page 376

Section 18
Station communication
Table 47:
Function description
Overcurrent protection with binary release
Breaker failure protection
Current harmonic monitoring, 2 phase
Two steps directional phase overcurrent protection
Real delta supervision, real
Two step residual overcurrent protection
Instantaneous residual overcurrent protection
Fault current and voltage monitoring
Fuse failure supervision
Two step overvoltage protection
Restricted earth fault protection, low impedance
Insulation gas monitoring
Insulation liquid monitoring
Transformer differential protection, two winding
Transformer tank overcurrent protection
Two step undervoltage protection
Voltage harmonic monitoring, 2 phase
Transformer energization control
Underimpedance protection for generators and
transformers
Fault locator, multi section
Distance protection, quadrilateral characteristic
Catenary distance protection, quadrilateral characteristic
18.3.4.2 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.
An external time source can be used to synchronize both the IED and the MU. It is also possible to
use the MU as a clock master to synchronize the IED from the MU. When using an external clock, it
is possible to set the IED to be synchronized via PPS,IRIG-B or PTP. It is also possible to use an
internal GPS receiver in the IED (if the external clock is using GPS).
370
Blocked protection functions if IEC/UCA 61850-9-2LE communication is interrupted and functions are
connected to specific MUs
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IEC 61850 identification
BRPTOC
CCRWRBRF
CHMMHAN
D2PTOC
DELSPVC
EF2PTOC
EFRWPIOC
FLTMMXU
FRWSPVC
O2RWPTOV
REFPDIF
SSIMG
SSIML
T1PPDIF
TPPIOC
U2RWPTUV
VHMMHAN
XENCPOW
ZGTPDIS
RWRFLO
ZRWPDIS
ZRCPDIS
Railway application RER670
1MRK506375-UEN Rev. N
GUID-CEDD520A-8A13-41DF-BFF1-8A3B4C00E098 v5
Application manual