1-16
Introduction and Specifications
Date Code 20011112
SEL-311L Instruction Manual
Zones 1–4 Phase and Residual Current Fault Detectors (FD)
Setting Range:
0.5–100.0 A secondary, 0.01 A steps (5 A nominal)
0.1–20.0 A secondary, 0.01 A steps (1 A nominal)
Accuracy:
±
0.05 A and ±3% of setting (5 A nominal)
±
0.01 A and ±3% of setting (1 A nominal)
Transient Overreach:
< 5% of pickup
Max. Operating Time:
See pickup and reset time curves in Figure 3.43 and Figure 3.44.
Instantaneous/Definite-Time Overcurrent Elements
Pickup Range:
OFF, 0.25–100.00 A, 0.01 A steps (5 A nominal)
OFF, 0.05–20.00 A, 0.01 A steps (1 A nominal)
Steady-State Pickup Accuracy:
±0.05 A and ±3% of setting (5 A nominal)
±0.01 A and ±3% of setting (1 A nominal)
Transient Overreach:
< 5% of pickup
Time Delay:
0.00–16,000.00 cycles, 0.25-cycle steps
Timer Accuracy:
±0.25 cycle and ±0.1% of setting
Max. Operating Time:
See pickup and reset time curves in Figure 3.43 and Figure 3.44.
Time-Overcurrent Elements
Pickup Range:
OFF, 0.50–16.00 A, 0.01 A steps (5 A nominal)
OFF, 0.10–3.20 A, 0.01 A steps (1 A nominal)
Steady-State Pickup Accuracy:
±
0.05 A and ±3% of setting (5 A nominal)
±
0.01 A and ±3% of setting (1 A nominal)
Time Dial Range:
0.50–15.00, 0.01 steps (US)
0.05–1.00, 0.01 steps (IEC)
Curve Timing Accuracy:
±1.50 cycles and ±4% of curve time for current between 2 and 30
multiples of pickup
Under---- and Overvoltage Elements
Pickup Range:
OFF, 0.00–150.00 V, 0.01 V steps (various elements)
OFF, 0.00–260.00 V, 0.01 V steps (phase-to-phase elements)
Steady-State Pickup Accuracy:
±1 V and ±5% of setting
Transient Overreach:
< 5% of pickup
Summary of Contents for SEL-311L
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