P.16.10
SEL-411L Relay Protection Manual Date Code 20151029
Relay Word Bits
Alphabetic
87R09P1–87R16P1 Received bit 9–16 from Remote Peer 1 420
87R17P1–87R24P1 Received bit 17 from Remote Peer 1 421
87R25P1–87R32P1 Received bit 25–32 from Remote Peer 1 422
87R01P2–87R08P2 Received bit 1–8 from Remote Peer 2 402
87R09P2–87R16P2 Received bit 9–16 from Remote Peer 2 424
87R17P2–87R24P2 Received bit 17 from Remote Peer 2 425
87R25P2–87R32P2 Received bit 25–32 from Remote Peer 2 426
87R01P3–87R08P3 Received bit 1–8 from Remote Peer 3 403
87R09P3–87R16P3 Received bit 9–16 from Remote Peer 3 428
87R17P3–87R24P3 Received bit 17–24 from Remote Peer 3 429
87R25P3–87R32P3 Received bit 25–32 from Remote Peer 3 430
87ROCT Open circuit CT not suspected in any phase 118
87ROCTA Open circuit CT not suspected in phase A 118
87ROCTB Open circuit CT not suspected in phase B 119
87ROCTC Open circuit CT not suspected in phase C 119
87ROCTU Open circuit CT not suspected, system appears balanced 117
87SLV The 87L function is in the slave mode; the differential current is not calculated, but the 87L func-
tion is operational owing to the 87 DTT
98
87SPTS Differential element single-pole trip selected 116
87STAG Differential element single-pole trip, A-phase 116
87STBG Differential element single-pole trip, B-phase 116
87STCG Differential element single-pole trip, C-phase 116
87SYNH The 87L system synchronized with high precision 98
87SYNL Synchronization of the 87L system potentially degraded 98
87T01E–87T08E Bit 1–8 transmitted over Ethernet 400
87T09E–87T16E Bit 9–16 transmitted over Ethernet 416
87T17E–87T24E Bit 17–24 transmitted over Ethernet 417
87T25E–87T32E Bit 25–32 transmitted over Ethernet 418
87T1P1–87T4P1 Bit 1–4 transmitted on Serial Port 1 398
87T1P2–87T4P2 Bit 1–4 transmitted on Serial Port 2 398
87TEST 87L function in a test mode. 99
87TESTL The 87L test has been initiated in the local relay 117
87TESTR The 87L test has been initiated in a remote relay 117
87TMSUP Test Mode Supervision (SEL
OGIC Eqn) 118
87TOK Internal Time suitable for 87L time-based synchronization 116
87TOUT Monitor 87L element response during 87L testing 119
87TST1–87TST3 Received TEST bit from Channel 1–3 packet 118
87USAFE Unreliable differential element input quantities. 93
87XBK2 Cross-phase second harmonic (second harmonic in any phase) 121
89AL Any Disconnect Alarm 356
89AL01 Disconnect 1 Alarm 356
Table 16.1 Alphabetical List of Relay Word Bits (Sheet 10 of 39)
Name Bit Description Row
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