Date Code 20011026 Specifications 2-35
SEL-321/321-1 Instruction Manual
Element Comment
50CL4
50CL3
50CL2
50CL1
50BL4
50BL3
50BL2
50BL1
C-phase Supervisory Overcurrent, Zone 4
C-phase Supervisory Overcurrent, Zone 3
C-phase Supervisory Overcurrent, Zone 2
C-phase Supervisory Overcurrent, Zone 1
B-phase Supervisory Overcurrent, Zone 4
B-phase Supervisory Overcurrent, Zone 3
B-phase Supervisory Overcurrent, Zone 2
B-phase Supervisory Overcurrent, Zone 1
50G4
50G3
50G2
50G1
50CL
50BL
50AL
*
Residual Overcurrent Supervision, Zone 4
Residual Overcurrent Supervision, Zone 3
Residual Overcurrent Supervision, Zone 2
Residual Overcurrent Supervision, Zone 1
Any C-phase Overcurrent Supervision Element Picked Up
Any B-phase Overcurrent Supervision Element Picked Up
Any A-phase Overcurrent Supervision Element Picked Up
Reserved For Future Use
OSB4
OSB3
OSB2
OSB1
50PP4
50PP3
50PP2
50PP1
Out-of-Step Block, Zone 4
Out-of-Step Block, Zone 3
Out-of-Step Block, Zone 2
Out-of-Step Block, Zone 1
Phase-to-Phase Supervisory Overcurrent, Zone 4
Phase-to-Phase Supervisory Overcurrent, Zone 3
Phase-to-Phase Supervisory Overcurrent, Zone 2
Phase-to-Phase Supervisory Overcurrent, Zone 1
TS
TC
TB
TA
ZLOUT
ZLIN
ILOP
50P
Trip Suspicion Condition
C-phase Trip
B-phase Trip
A-phase Trip
Load Element - Load Out
Load Element - Load In
Internal Loss-of-Potential Condition
Single-Phase REJO Overcurrent Element
SPT_EN
*
*
*
*
52AC
52AB
52AA
SPTE asserted or ESPT = Y or Y1
Reserved For Future Use
Reserved For Future Use
Reserved For Future Use
Reserved For Future Use
Breaker(s) Auxiliary Contact Pole C
Breaker(s) Auxiliary Contact Pole B
Breaker(s) Auxiliary Contact Pole A
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