Date Code 20011112
Introduction and Specifications
1-17
SEL-311L Instruction Manual
Synchronism-Check Elements
Slip Frequency Pickup Range:
0.005–0.500 Hz, 0.001 Hz steps
Slip Frequency Pickup Accuracy:
±0.003 Hz
Phase Angle Range:
0–80°, 1° steps
Phase Angle Accuracy:
±
4°
Definite-Time Over- or Underfrequency (81) Elements
Pickup Range:
41.00–65.00 Hz, 0.01 Hz steps
Pickup Time:
32 ms at 60 Hz (Max)
Time Delays:
2.00–16,000.00 cycles, 0.25-cycle steps
Maximum Definite-Time Delay
Accuracy:
±
0.25 cycles,
±
1% of setting at 60 Hz
Steady-State
plus
Transient
Overshoot:
±
0.01 Hz
Supervisory 27:
20.0–150.0 V,
±
5%,
±
0.1 V
Summary of Contents for SEL-311L
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