Sel 411L - Figure 3.54 Zero-Sequence Elements Operating Times-Serial Communication; Figure 3.55 Phase Elements Operating Times-Ethernet Communication; Table 3.41 Current Line Differential Operating Times (Cycles)-Ethernet Communication

P.3.101
Date Code 20151029 Protection Manual SEL-411L Relay
Protection Functions
87L Differential Elements
Figure 3.54 Zero-Sequence Elements Operating Times—Serial Communication
Figure 3.55 Phase Elements Operating Times—Ethernet Communication
Table 3.41 Current Line Differential Operating Times (Cycles)—Ethernet
Communication
Multiples of Pickup Phase Negative-sequence Zero-sequence
1 1.79 1.92 1.92
2 1.28 1.61 1.61
4 1.03 1.26 1.26
8 0.82 1.04 1.04
10 0.83 1.07 1.07
15 0.8 0.99 0.99
20 0.76 0.91 0.91
0.6
0.8
1
1.2
1.4
1.6
1.8
2
0 2 4 6 8 10 12 14 16 18 20
Multiples of Pickup
Time (cycles)
Zero-Sequence Elements
2
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
0 5 10 15 20 25
Multiples of Pickup
Time (cycles)
Phase Elements