3.31
Date Code 20060320 Instruction Manual SEL-311C Relay
Distance, Out-of-Step, Overcurrent, Voltage, Synchronism Check, and Frequency Elements
Instantaneous/Definite-Time Overcurrent Elements
Settings Ranges
Accuracy
Pickup and Reset Time Curves
See Figure 3.20 and Figure 3.21.
Settings Range Description
Pickup Settings 50Q1P–50Q4P
OFF, 0.25–100.00 A secondary 5 A nominal phase current inputs, IA, IB, IC
OFF, 0.05–20.00 A secondary 1 A nominal phase current inputs, IA, IB, IC
Definite-Time Settings 67Q1D–67Q4D
0.00–16000.00 cycles, in 0.25-cycle steps
Pickup
±0.05 A secondary and ±3% of setting
(5 A nominal phase current inputs, IA, IB, IC)
±0.01 A secondary and ±3% of setting
(1 A nominal phase current inputs, IA, IB, IC)
Timer
±0.25 cycles and ±0.1% of setting
Transient Overreach
<5% of setting
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