ABB RELION REB500 Technical Manual page 84

Section 5
Bay protection functions
Table 60: Signals POTT_REC
Signal
MEAS OR2
BIT_UNBL
HFREC
BIT_TBE
DELAY2
M_OWN
EXTBLK_HF
MEAS_BWD
UWEAK_L1
UWEAK_L2
UWEAK_L3
P_WEAK
TBA_POTT
TRIP_POTT
UWEAK_POTT
UWEAK_L1_POTT
UWEAK_L2_POTT
UWEAK_L3_POTT
Overreaching blocking scheme (BLOCK OR)
The BLOCK OR logic is divided into a receive logic (BLOC_REC) and a transmit logic
(BLOC_SEND).
The output signals from the receive logic (BLOC_REC) are transferred to the tripping logic,
while taking account of any transient blocking due to reversal of energy direction (TRANSBL).
The output signals from the transmit logic are transferred to the common transmit logic for
PUTT, POTT and BLOCK OR schemes. The tripping and transmit criteria can be seen from the
tabular overview below.
78
In Out
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
© Copyright 2019 ABB. All rights reserved
Source
Binary output: Meas Oreach
Internal logic signal (UNBLOCK)
Binary input: Com Rec
Internal logic signal TRANSBL
Binary output: Delay 2
Internal logic signal (TRIP2)
Binary input: Com Rec
Binary output: Meas Bward
UL1 < Umin
UL2 < Umin
UL3 < Umin
Setting: Weak
On = 1; Off = 0
Bay protection functions REB500
1MRK 505 406-UEN B
Drain
Internal logic signal
TRANSBL
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 signal to tripping
logic (TRIP1)
Internal signal to tripping
logic (TRIP1)
Internal signal to tripping
logic (TRIP1)
Internal signal to tripping
logic (TRIP1)
GUID-26BC59BE-2C94-4675-A3EA-E6724D37FEAC v1
Technical manual