ABB RELION REB500 Technical Manual page 86

Section 5
Bay protection functions
BLOCK receive logic (BLOC_REC)
P_BLOCK
HFFAIL
P_T1_BLOCK
HFREC
DELAY2
M_OWN
BIT_TBE
IEC19000434 V1 EN-US
Figure 30: BLOC_REC segment
Table 62: Signals BLOC_REC
Signal
P_BLOCK
HFFAIL
BIT_TBE
MEAS OR2
DELAY2
MEAS_BWD
EXTBLK_HF
P_T1_BLOCK
M_OWN
HFREC
TRIP_BLOCK
TBA_BLOCK
Reversal of power direction (TRANSBL)
This logic is only used in conjunction with a permissive over-reaching transfer tripping scheme
(POTT) or an overreaching blocking scheme (BLOCK OR) on double-circuit lines with in-feeds
from both ends and a high mutual zero-sequence impedance (both circuits on the same
pylons). A blocking scheme does not require this logic, providing the waiting time is set
sufficiently long.
80
AND
MEAS_OR2
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T1
OR
18000029-IEC19000434-1-en.vsdx
In Out Source
X Setting: Com Mode
BLOCK OR. P_BLOCK= 1
X Binary input Com Fail
X Internal logic signal TRANSBL
X Binary output: Meas Oreach
X Binary output: Delay 2
X Binary output: Meas Bward
X Binary input: Com Rec
Setting: t1Block
X Internal logic signal (TRIP2)
X Binary input: Com Rec
X
X
GUID-FF5B11F4-7F28-49B4-BBC1-C4C142D6D30F v1
AND
TRIP_BLOCK
TBA_BLOCK
AND
Drain
Internal signal to tripping
logic (TRIP2), where it is
compared with all the
tripping conditions to
generate the binary
signals Trip L1, Trip L2 etc.
Internal logic signal
TRANSBL
GUID-967B11E2-07FE-4A97-BAE5-7A1B47E5868E v1
Bay protection functions REB500
1MRK 505 406-UEN B
Technical manual