Sel 411L - Page 974

P.16.46
SEL-411L Relay Protection Manual Date Code 20151029
Relay Word Bits
Row List
55 TRIP Trip A, Trip B, or Trip C
55 3PT Three-pole trip
55 SPT Single-pole trip
55 TPA1, TPB1 Circuit Breaker 1 Trip A, Trip B
56 TPC1, TPA2, TPB2, TPC2 Circuit Breaker 1 Trip C, Circuit Breaker 2 Trip A, Trip B, Trip C
56 TOP Trip during open pole timer is asserted
56 ULTR Unlatch all protection trips
56 ULMTR1, ULMTR2 Circuit Breaker 1–2 unlatch manual trip
57 ULTRA, ULTRB, ULTRC Unlatch Trip A, Trip B, Trip C
57 DTA, DTB, DTC Direct transfer trip A-phase, B-phase, C-phase (SEL
OGIC control equation)
Pilot Tripping Elements
58 PT Permissive trip received
58 Z3RB Current reversal guard asserted
58 KEY Transmit permissive trip signal
58 EKEY Echo received permissive trip signal
58 ECTT Echo conversion to trip signal
58 27AWI, 27BWI, 27CWI A-phase, B-phase, C-phase undervoltage condition
59 WFC Weak infeed condition detected
59 KEY1 Transmit general permissive trip
59 KEY3 Transmit three-phase permissive trip
59 UBB1 Blocks permissive trip Receiver 1
59 PTRX1 Permissive trip received Channel 1
59 UBB2 Blocks permissive trip Receiver 2
59 PTRX2 Permissive trip received Channel 2
59 UBB Block permissive trip received 1 or 2
60 PTRX Permissive trip received Channel 1 and Channel 2
60 Z3XT Current reversal guard timer picked up
60 Z2PGS Zone 2 phase and ground short delay element
60 67QG2S Negative-sequence and residual directional overcurrent short delay element
60 DSTRT Directional start element picked up
60 NSTRT Non-directional start element picked up
60 STOP Stop element picked up
60 BTX Block extension picked up
61 Z3RBA, Z3RBB, Z3RBC A-phase, B-phase, C-phase current reversal guard asserted (ECOMM = POTT3)
61 KEYA, KEYB, KEYC Transmit A-phase, B-phase, C-phase permissive trip (ECOMM = POTT3)
61 KEYD Transmit directional permissive trip (ECOMM = POTT, EPTDIR = Y)
62 EKEYA, EKEYB, EKEYC A-phase, B-phase, C-phase echo received permissive trip signal (ECOMM = POTT3)
62 ECTTA, ECTTB, ECTTC A-phase, B-phase, C-phase echo conversion to trip signal (ECOMM = POTT3)
63 PTA, PTB, PTC A-phase, B-phase, C-phase permissive trip received (ECOMM = POTT3)
63 PTDRX Directional permissive trip received (ECOMM = POTT, EPTDIR = Y)
Table 16.2 Row List of Relay Word Bits (Sheet 8 of 35)
Row Name Bit Description