5-28 Applications Date Code 20011026
SEL-321/321-1 Instruction Manual
SETTINGS SHEET Page 2 OF 10
FOR THE SEL-321/321-1 RELAY Date
(5 A
NOMINAL RELAY)
Mho Ground Distance Settings
Impedance Reach: Zone 1: (0.05 - 64 Ω sec.) Z1MG = 6.24
Zone 2: (0.05 - 64 Ω sec.) Z2MG = 9.36
Zone 3: (0.05 - 64 Ω sec.) Z3MG = 1.87
Zone 4: (0.05 - 64 Ω sec.) Z4MG =
Quadrilateral Ground Distance Settings
Reactive Reach: Zone 1: (0.05 - 64 Ω sec.) XG1 = 6.24
Zone 2: (0.05 - 64 Ω sec.) XG2 = 9.36
Zone 3: (0.05 - 64 Ω sec.) XG3 = 1.87
Zone 4: (0.05 - 64 Ω sec.) XG4 =
Resistive Reach: Zone 1: (0.05 - 50 Ω sec.) RG1 = 2.50
Zone 2: (0.05 - 50 Ω sec.) RG2 = 5.00
Zone 3: (0.05 - 50 Ω sec.) RG3 = 6.00
Zone 4: (0.05 - 50 Ω sec.) RG4 =
Ground Distance Overcurrent Supervision Settings
Phase Overcurrent Supervision: Zone 1: (0.5 - 100 amps sec.) 50L1 = 0.90
Zone 2: (0.5 - 100 amps sec.) 50L2 = 0.90
Zone 3: (0.5 - 100 amps sec.) 50L3 = 1.30
Zone 4: (0.5 - 100 amps sec.) 50L4 =
Residual Overcurrent Supervision: Zone 1: (0.5 - 100 amps sec.) 50G1 = 0.90
Zone 2: (0.5 - 100 amps sec.) 50G2 = 0.60
Zone 3: (0.5 - 100 amps sec.) 50G3 = 0.50
Zone 4: (0.5 - 100 amps sec.) 50G4 =
Zero-Sequence Compensation Factor Settings
Zone 1 Zero-Sequence Comp. Factor 1 Magnitude: (0 - 4 unitless) k01M = 0.726
Zone 1 Zero-Sequence Comp. Factor 1 Angle: (±180°) k01A = -3.69
Zones 2, 3, & 4 Zero-Sequence Comp. Factor 2 Mag.: (0 - 4 unitless) k0M = 0.726
Zones 2, 3, & 4 Zero-Sequence Comp. Factor 2 Angle: (±180°) k0A = -3.69
Non-Homogeneous Correction Angle: (±20°) T = 0
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