ABB RELION REB500 Technical Manual page 81

1MRK 505 406-UEN B
Table 58: Signals PUTT_REC (see above diagram)
Signal
PUTT_NONDIR
PUTT_FWD
PUTT_OR
DELAY2
M_OWN
START_L1L2L3
UZ_FWD
MEAS OR2
BIT_UNBL
HFREC
P_WEAK
UWEAK_L1
UWEAK_L2
UWEAK_L3
TRIP_PUTT
UWEAK_PUTT
UWEAK_L1_PUTT
UWEAK_L2_PUTT
UWEAK_L3_PUTT
Permissive overreaching transfer tripping (POTT)
The POTT logic is divided into a receive logic (POTT_REC) and a transmit logic (POTT_SEND).
The receive logic (POTT_REC) transfers its output signals to the tripping logic. Account is
taken of any weak infeed (Weak) [UWEAK_L1, L2, L3], a short enable signal in the event of
failure of the communication channel (Unblock) [BIT_UNBL] or transient blocking (Transbl)
[BIT_TBE] signal.
The logic (POTT_SEND) transfers its output signals to a com-mon transmit logic for PUTT,
POTT and BLOCK OR schemes, while taking account of any echo signal received in the event of
a weak infeed. The criteria for tripping [TRIP_POTT] and transmission [SEND_POTT] of a
transfer trip signal by the distance protection function in a POTT scheme are given in the
tabular overview below:
Bay protection functions REB500
Technical manual
In Out
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
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Source
Setting: Com Mode
PUTT non-directional:
PUTT_NONDIR = 1
PUTT Forwards:
PUTT_FWD = 1
PUTT OR2:
PUTT_BWD = 1
Binary output: Delay 2
Internal logic signal (TRIP2)
Binary output: Start L1+L2+L3
Binary output: Meas Fward
Binary output: Meas Oreach
Internal logic signal (UNBLOCK)
Binary input: Com Rec
Setting: Weak
On = 1; Off = 0
UL1 < Umin
UL2 < Umin
UL3 < Umin
Section 5
Bay protection functions
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 signal to
tripping logic (TRIP1)
Internal signal to
tripping logic (TRIP1)
Internal signal to
tripping logic (TRIP1)
Internal signal to
tripping logic (TRIP1)
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