Schweitzer Engineering Laboratories SEL-321 - Page 49

Date Code 20011026 Specifications 2-25
SEL-321/321-1 Instruction Manual
Element Comment
Z4GT
Z3GT
Z2GT
LOP
M4PT
M3PT
M2PT
OPA
Zone 4 Ground Distance, Time Delayed
Zone 3 Ground Distance, Time Delayed
Zone 2 Ground Distance, Time Delayed
Loss-of-Potential Condition Indication
Zone 4 Phase Distance, Time Delayed
Zone 3 Phase Distance, Time Delayed
Zone 2 Phase Distance, Time Delayed
Open Phase Alarm
67Q4
67Q3
67Q2
67Q1
67N4
67N3
67N2
67N1
Level 4 Directional Neg.-Seq. Overcurrent, Instantaneous
Level 3 Directional Neg.-Seq. Overcurrent, Instantaneous
Level 2 Directional Neg.-Seq. Overcurrent, Instantaneous
Level 1 Directional Neg.-Seq. Overcurrent
Level 4 Directional Residual Overcurrent, Instantaneous
Level 3 Directional Residual Overcurrent, Instantaneous
Level 2 Directional Residual Overcurrent, Instantaneous
Level 1 Directional Residual Overcurrent
67Q4T
67Q3T
67Q2T
OST
67N4T
67N3T
67N2T
OSB
Level 4 Directional Neg.-Seq. Overcurrent, Time Delayed
Level 3 Directional Neg.-Seq. Overcurrent, Time Delayed
Level 2 Directional Neg.-Seq. Overcurrent, Time Delayed
Out-of-Step Trip Condition Declaration
Level 4 Directional Residual Overcurrent, Time Delayed
Level 3 Directional Residual Overcurrent, Time Delayed
Level 2 Directional Residual Overcurrent, Time Delayed
Out-of-Step Block Condition Declaration
PD1
3P27
27L
50H
50MF
51NT
51QT
51PT
Breaker 1 Phase Discordance Declaration
Three-Phase Undervoltage Condition
Single-Phase Undervoltage Condition
High-Set Phase Overcurrent, Instantaneous
Medium-Set Phase Overcurrent Time Delayed by 50MF Timer
Residual Time-Overcurrent Timed Out
Negative-Sequence Time-Overcurrent Timed Out
Phase Time-Overcurrent Timed Out
ZLOAD
SOTFE
TCM
*
3PO
SPO
REJO
PD2
Load Element
Switch-Onto-Fault Logic Enabled
Trip Coil Monitor Alarm
Reserved for future use
Three Poles Open
Single-Pole Open
Remote End Just Opened Condition
Breaker 2 Phase Discordance Declaration