Sel SEL-421 - A.6 Relay Word Bits: Directional Elements

R.A.26
SEL-421 Relay Reference Manual Date Code 20111215
Relay Word Bits
Row List
18 OSB Out-of-step block
18 OSTI Incoming out-of-step tripping
18 OSTO Outgoing out-of-step tripping
18 OST Out-of-step tripping
19 67QUBF Forward direction supervised output from 50QUBP
19 67QUBR Reverse direction supervised output from 50QUBP
19 OOSDET Out-of-step condition detected
19 * Reserved
19 * Reserved
19 * Reserved
19 * Reserved
19 * Reserved
Table A.6 Relay Word Bits: Directional Elements (Sheet 1 of 2)
Row Name Description
20 F32P Forward phase directional declaration
20 R32P Reverse phase directional declaration
20 F32Q Forward negative-sequence phase directional declaration
20 R32Q Reverse negative-sequence phase directional declaration
20 32QF Forward negative-sequence overcurrent directional
declaration
20 32QR Reverse negative-sequence overcurrent directional
declaration
20 32SPOF Forward open-pole directional declaration
20 32SPOR Reverse open-pole directional declaration
21 50QF Forward negative-sequence supervisory current element
21 50QR Reverse negative-sequence supervisory current element
21 50GF Forward zero-sequence supervisory current element
21 50GR Reverse zero-sequence supervisory current element
21 32QE 32Q internal enable
21 32QGE 32QG internal enable
21 32VE 32V internal enable
21 32IE 32I internal enable
22 F32I Forward current polarized zero-sequence directional
element
22 R32I Reverse current polarized zero-sequence directional
element
22 F32V Forward voltage polarized zero-sequence directional
element
22 R32V Reverse voltage polarized zero-sequence directional
element
22 F32QG Forward negative-sequence ground directional element
22 R32QG Reverse negative-sequence ground directional element
Table A.5 Relay Word Bits: Out-of-Step Elements (Sheet 2 of 2)
Row Name Description