ABB Relion REC670 Applications Manual page 420

Section 18
Station communication
Failure of the MU (sample lost) blocks the sending of binary signals through LDCM. The
received binary signals are not blocked and processd normally.
→DTT from the remote end is still processed.
IEC13000299 V1 EN-US
Figure 203: MU failed, mixed system
Case 3:
Failure of one MU (sample lost) blocks the sending and receiving of binary signals through
LDCM.
→DTT from the remote end is not working.
IEC13000300 V1 EN-US
Figure 204: MU failed, 9-2 system
Table 45: Blocked protection functions if IEC 61850-9-2LE communication is interrupted.
Function description
Accidental energizing
protection for
synchronous generator
Broken conductor check
Capacitor bank
protection
Pole discordance
protection
Breaker failure
protection
Table continues on next page
414
IEC13000299-1-en.vsd
IEC13000300-1-en.vsd
IEC 61850 identification
AEGPVOC
BRCPTOC
CBPGAPC
CCPDSC
CCRBRF
Function description
Two step overvoltage
protection
Four step single phase
overcurrent protection
Radial feeder protection
Instantaneous phase
overcurrent protection
PoleSlip/Out-of-step
protection
1MRK 511 358-UEN A
IEC 61850 identification
OV2PTOV
PH4SPTOC
PAPGAPC
PHPIOC
PSPPPAM
Application manual