Sel 551 - Page 108

SET.2 of 12 Settings Sheets for the SEL-551 Relay
Relay Settings (SET Command)
SEL-551 Relay Instruction Manual Date Code 20110408
Date________________
Single-Phase Instantaneous Overcurrent Elements 50A, 50B, 50C
(see Figure 3.5)
Pickup
(OFF, 0.5–80.0 A in 0.1 A increments) (5 A nominal)
(OFF, 0.1–16.0 A in 0.1 A increments) (1 A nominal)
50ABCP =
Phase Time-Overcurrent Element 51P1T (see Figure 3.9)
Pickup
(OFF, 0.5–16.0 A in 0.1 A increments) (5 A nominal)
(OFF, 0.1–3.2 A in 0.1 A increments) (1 A nominal)
51P1P =
Curve (U1–U5, C1–C5; see Figure 4.1–Figure 4.10)
51P1C =
Time Dial
0.50–15.00 for curves U1–U5
0.05–1.00 for curves C1–C5
51P1TD =
Electromechanical Reset (Y, N)
51P1RS =
Phase Time-Overcurrent Element 51P2T (see Figure 3.9)
Pickup
(OFF, 0.5–16.0 A in 0.1 A increments) (5 A nominal)
(OFF, 0.1–3.2 A in 0.1 A increments) (1 A nominal)
51P2P =
Curve (U1–U5, C1–C5; see Figure 4.1–Figure 4.10)
51P2C =
Time Dial
0.50–15.00 for curves U1–U5
0.05–1.00 for curves C1–C5
51P2TD =
Electromechanical Reset (Y, N)
51P2RS =
Neutral Ground Instantaneous Overcurrent Elements 50N1, 50N2
(see Figure 3.6)
Pickup
(OFF, 0.5–80.0 A in 0.1 A increments) (5 A nominal)
(OFF, 0.1–16.0 A in 0.1 A increments) (1 A nominal)
50N1P =
Pickup
(OFF, 0.5–80.0 A in 0.1 A increments) (5 A nominal)
(OFF, 0.1–16.0 A in 0.1 A increments) (1 A nominal)
50N2P =
Neutral Ground Time-Overcurrent Elements 51N1T (see Figure 3.10)
Pickup
(OFF, 0.5–16.0 A in 0.1 A increments) (5 A nominal)
(OFF, 0.1–3.2 A in 0.1 A increments) (1 A nominal)
51N1P =