11.2
SEL-421 Relay Instruction Manual Date Code 20171021
Relay Word Bits
Alphabetical List
276P2 Undervoltage Element 6, Level 2 asserted 386
27APO A-Phase undervoltage, pole-open 78
27AWI A-Phase undervoltage condition 58
27B81 Undervoltage supervision for frequency elements 392
27BPO B-Phase undervoltage, pole-open 78
27BWI B-Phase undervoltage condition 58
27CPO C-Phase undervoltage, pole-open 79
27CWI C-Phase undervoltage condition 58
27TC1 Undervoltage Element 1, torque control 384
27TC2 Undervoltage Element 2, torque control 384
27TC3 Undervoltage Element 3, torque control 385
27TC4 Undervoltage Element 4, torque control 385
27TC5 Undervoltage Element 5, torque control 386
27TC6 Undervoltage Element 6, torque control 386
2POBK1 Two poles open Circuit Breaker 1 48
2POBK2 Two poles open Circuit Breaker 2 48
32GF Forward ground directional element 30
32GR Reverse ground directional element 30
32IE 32I internal enable 29
32QE 32Q internal enable 29
32QF Forward negative-sequence overcurrent directional declaration 28
32QGE 32QG internal enable 29
32QR Reverse negative-sequence overcurrent directional declaration 28
32SPOF Forward open-pole directional declaration 28
32SPOR Reverse open-pole directional declaration 28
32VE 32V internal enable 29
3P1CLS Three-pole Circuit Breaker 1 reclose supervision (SEL
OGIC control equation) 45
3P2CLS Three-pole Circuit Breaker 2 reclose supervision (SEL
OGIC control equation) 45
3PARC Three-pole reclose initiate qualified 42
3PLSHT Three-pole reclose last shot 43
3PO All three poles open 78
3POBK1 Three-pole open Circuit Breaker 1 42
3POBK2 Three-pole open Circuit Breaker 2 43
3POI Three-pole open interval timing 50
3POISC Three-pole open interval supervision condition 50
3POLINE Three-pole open line 43
3PRCIP Three-pole reclaim in progress 48
3PRI Three-pole reclose initiation (SEL
OGIC control equation) 42
3PS Trip logic three-phase selected 54
3PSHOT0–3PSHOT4 Three-pole shot counter = 0–4 49
3PT Three-pole trip 55
Table 11.1 Alphabetic List of Relay Word Bits (Sheet 2 of 34)
Name Description Row
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