Schweitzer Engineering Laboratories SEL-311C - Figure 3.14 Ground and Phase Distance Speed Curves-Fast Hybrid Output

3.18
SEL-311C Relay Instruction Manual Date Code 20060320
Distance, Out-of-Step, Overcurrent, Voltage, Synchronism Check, and Frequency Elements
Distance Element Operating Time Curves at Nominal Frequency
Figure 3.14 Ground and Phase Distance Speed Curves—Fast Hybrid Output
0
0.25
0.5
0.75
1
1.25
1.5
1.75
2
0% 10% 20% 30% 40% 50% 60% 70% 80% 90%
100%
0
0.25
0.5
0.75
1
1.25
1.5
1.75
2
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Fault Location in Percent of Set Reach
Trip Time in Cycles
SEL-311C with Fast Hybrid Output Contacts
Phase Mho Operating Times
SIR = 0.1
SIR = 1.0
SIR = 10.0
SIR = 30.0
Fault Location in Percent of Set Reach
Trip Time in Cycles
SEL-311C with Fast Hybrid Output Contacts
Ground Mho Operating Times
SIR = 0.1
SIR = 1.0
SIR = 10.0
SIR = 30.0
0
0.25
0.5
0.75
1
1.25
1.5
1.75
2
2.25
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Fault Location (% of Relay Reach)
Time (Cycles)
SEL-311C with Fast Hybrid Output Contacts
Quadrilateral Ground Operating Times
SIR = 0.1
SIR = 1.0
SIR = 10.0
SIR = 30.0