ABB Relion REC670 - 18.4 LON communication protocol

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.
IEC13000299-1-en.vsd
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.
IEC13000300-1-en.vsd
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 IEC 61850 identification Function description IEC 61850 identification
Accidental energizing
protection for
synchronous generator
AEGPVOC Two step overvoltage
protection
OV2PTOV
Broken conductor check BRCPTOC Four step single phase
overcurrent protection
PH4SPTOC
Capacitor bank
protection
CBPGAPC Radial feeder protection PAPGAPC
Pole discordance
protection
CCPDSC Instantaneous phase
overcurrent protection
PHPIOC
Breaker failure
protection
CCRBRF PoleSlip/Out-of-step
protection
PSPPPAM
Table continues on next page
Section 18 1MRK 511 358-UEN A
Station communication
414
Application manual