R.A.27
Date Code 20111215 Reference Manual SEL-421 Relay
Relay Word Bits
Row List
22 32GF Forward ground directional element
22 32GR Reverse ground directional element
Table A.7 Relay Word Bits: Overcurrent Elements (Sheet 1 of 2)
Row Name Description
23 50P1 Level 1 phase overcurrent element
23 50P2 Level 2 phase overcurrent element
23 50P3 Level 3 phase overcurrent element
23 50P4 Level 4 phase overcurrent element
23 67P1 Level 1 phase directional overcurrent element
23 67P2 Level 2 phase directional overcurrent element
23 67P3 Level 3 phase directional overcurrent element
23 67P4 Level 4 phase directional overcurrent element
24 67P1T Level 1 phase-delayed directional overcurrent element
24 67P2T Level 2 phase-delayed directional overcurrent element
24 67P3T Level 3 phase-delayed directional overcurrent element
24 67P4T Level 4 phase-delayed directional overcurrent element
24 50G1 Level 1 residual overcurrent element
24 50G2 Level 2 residual overcurrent element
24 50G3 Level 3 residual overcurrent element
24 50G4 Level 4 residual overcurrent element
25 67G1 Level 1 residual directional overcurrent element
25 67G2 Level 2 residual directional overcurrent element
25 67G3 Level 3 residual directional overcurrent element
25 67G4 Level 4 residual directional overcurrent element
25 67G1T Level 1 residual delayed directional overcurrent element
25 67G2T Level 2 residual delayed directional overcurrent element
25 67G3T Level 3 residual delayed directional overcurrent element
25 67G4T Level 4 residual delayed directional overcurrent element
26 50Q1 Level 1 negative-sequence overcurrent element
26 50Q2 Level 2 negative-sequence overcurrent element
26 50Q3 Level 3 negative-sequence overcurrent element
26 50Q4 Level 4 negative-sequence overcurrent element
26 67Q1 Level 1 negative-sequence directional overcurrent element
26 67Q2 Level 2 negative-sequence directional overcurrent element
26 67Q3 Level 3 negative-sequence directional overcurrent element
26 67Q4 Level 4 negative-sequence directional overcurrent element
27 67Q1T Level 1 negative sequence delayed directional overcurrent
element
27 67Q2T Level 2 negative-sequence delayed directional overcurrent
element
Table A.6 Relay Word Bits: Directional Elements (Sheet 2 of 2)
Row Name Description
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