Sel 551 - Page 110

SET.4 of 12 Settings Sheets for the SEL-551 Relay
Relay Settings (SET Command)
SEL-551 Relay Instruction Manual Date Code 20110408
Date________________
Negative-Sequence Time Overcurrent Element 51Q1T (see Figure 3.12)
IMPORTANT: See Appendix F: Setting Negative-Sequence Overcurrent Elements for information on
setting negative-sequence overcurrent elements.
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)
51Q1P =
Curve (U1–U5, C1–C5; see Figure 4.1–Figure 4.10)
51Q1C =
Time Dial
0.50–15.00 for curves U1–U5
0.05–1.00 for curves C1–C5
51Q1TD =
Electromechanical Reset (Y, N)
51Q1RS =
Negative-Sequence Time Overcurrent Element 51Q2T (see Figure 3.12)
IMPORTANT: See Appendix F: Setting Negative-Sequence Overcurrent Elements for information on
setting negative-sequence overcurrent elements.
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)
51Q2P =
Curve (U1–U5, C1–C5; see Figure 4.1–Figure 4.10)
51Q2C =
Time Dial
0.50–15.00 for curves U1–U5
0.05–1.00 for curves C1–C5
51Q2TD =
Electromechanical Reset (Y, N)
51Q2RS =
Reclosing Relay Open Interval Timer (see Reclosing Relay on page 3.22)
Open Interval 1 Time
(0–54000 cycles in 0.125 cycle increments)
79OI1 =
Open Interval 2 Time
(0–54000 cycles in 0.125 cycle increments)
79O12 =
Open Interval 3 Time
(0–54000 cycles in 0.125 cycle increments)
79O13 =
Open Interval 4 Time
(0–54000 cycles in 0.125 cycle increments)
79O14 =
Reclosing Relay Reset Timer (see Reclosing Relay on page 3.22)
Reset Time from Reclose Cycle
(0–54000 cycles in 0.125 cycle increments)
79RSD =
Reset Time from Lockout
(0–54000 cycles in 0.125 cycle increments)
79RSLD =