Date Code 20011026 Applications 5-27
SEL-321/321-1 Instruction Manual
SETTINGS SHEET Page 1 OF 10
FOR THE SEL-321/321-1 RELAY Date
(5 A
NOMINAL RELAY)
Line Terminal Settings
Relay Identifier: (17 Characters) RELID = SEL-321 POTT
Terminal Identifier: (39 Characters) TRMID = EXAMPLE: BUS B, BREAKER 3
Positive-Seq. Line Impedance Magnitude: (0.05 - 255 Ω sec.) Z1MAG = 7.80
Positive-Seq. Line Impedance Angle: (5° - 90°) Z1ANG = 83.97
Zero-Seq. Line Impedance Magnitude: (0.05 - 255 Ω sec.) Z0MAG = 24.79
Zero-Seq. Line Impedance Angle: (5° - 90°) Z0ANG = 81.46
Fault Location Enable: (Y, R, N) LOCAT = Y
Line Length: (0.1 - 999 unitless) LL = 100.00
Current Transformer Ratio: (1 - 6000) CTR = 200
Potential Transformer Ratio: (1 - 10000) PTR = 2000
Enable Zones of Distance Settings
Number Distance Zones: Mho Phase: (N, 1, 2, 3, 4) PMHOZ = 3
Mho Ground: (N, 1, 2, 3, 4) GMHOZ = 3
Quad. Ground: (N, 1, 2, 3, 4) QUADZ = 3
Distance Zones and Overcurrent Levels Direction Settings
Distance Zone 1/Overcurrent Level 1 Direction: (F/R) DIR1 = F
Distance Zone 2/Overcurrent Level 2 Direction: (F/R) DIR2 = F
Distance Zone 3/Overcurrent Level 3 Direction: (F/R) DIR3 = R
Distance Zone 4/Overcurrent Level 4 Direction: (F/R) DIR4 = F
Mho Phase Distance Settings
Impedance Reach: Zone 1: (0.05 - 64 Ω sec.) Z1P = 6.24
Zone 2: (0.05 - 64 Ω sec.) Z2P = 9.36
Zone 3: (0.05 - 64 Ω sec.) Z3P = 1.87
Zone 4: (0.05 - 64 Ω sec.) Z4P =
Mho Phase Distance Overcurrent Supervision Settings
Phase-to-Phase Overcurrent: Zone 1: (1 - 170 amps sec.) 50PP1 = 2.55
Zone 2: (1 - 170 amps sec.) 50PP2 = 2.22
Zone 3: (1 - 170 amps sec.) 50PP3 = 2.45
Zone 4: (1 - 170 amps sec.) 50PP4 =
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