ABB RELION REB500 Technical Manual page 80

Section 5
Bay protection functions
PUTT receive logic (PUTT_REC)
The receive logic (PUTT_REC) transfers its output signals to the tripping logic. Account is
taken of a weak infeed (Weak) [UWEAK_L1, L2, L3] or a short enable signal in the event of
failure of the communication channel (Unblock) [BIT_UNBL].
Provision is made for applying the tripping criterion to the entire underimpedance starting
characteristic (PUTT non-directional) [PUTT_NONDIR], starting in forwards direction (PUTT
Forwards) [PUTT_FWD] or the overreaching of 2nd zone (PUTT OR2) [PUTT_OR2].
IEC19000428 V1 EN-US
Figure 26: PUTT_REC segment
74
The transmission criteria are fulfilled when the local measuring unit trips, the
starters have picked up and the third time step has not started.
PUTT_NONDIR
AND
START_L1L2L3
AND
PUTT_FWD
UZ_FWD
PUTT_OR
AND
MEAS_OR2
DELAY2
OR
M_OWN
BIT_UNBL
HFREC
AND
P_WEAK
100
100
UWEAK_L1
UWEAK_L2
UWEAK_L3
OR
5000
© Copyright 2019 ABB. All rights reserved
OR
AND
OR
OR
AND
OR
UWEAK_L1_PUTT
AND
UWEAK_L2_PUTT
AND
UWEAK_L3_PUTT
18000025-IEC19000428-1-en.vsdx
1MRK 505 406-UEN B
GUID-DF78E9B4-5AED-4F54-BDB4-282C1DCFC704 v1
TRIP_PUTT
UWEAK_PUTT
Bay protection functions REB500
Technical manual