Schweitzer Engineering Laboratories SEL-351 - Page 386

SETTINGS SHEET Page 6 of 24
FOR THE SEL-351 RELAY Date
RELAY SETTINGS (SERIAL PORT COMMAND SET AND FRONT PANEL)
Date Code 20001006
Residual Ground Time-Overcurrent Element (See Figure 3.19)
(Make the following settings if preceding enable setting E51G = Y)
Pickup (OFF, 0.50 - 16.00 A {5 A nom.}, 0.10 - 3.20 A {1 A nom.}) 51GP =
Curve (U1 - U5, C1 - C5; see Figures 9.1 through 9.10) 51GC =
Time-Dial (0.50 - 15.00 for curves U1-U5, 0.05 - 1.00 for curves C1-C5) 51GTD =
Electromechanical Reset (Y, N) 51GRS =
Negative-Sequence Time-Overcurrent Element (See Figure 3.20)*
(Make the following settings if preceding enable setting E51Q = Y)
Pickup (OFF, 0.50 - 16.00 A {5 A nom.}, 0.10 - 3.20 A {1 A nom.}) 51QP =
Curve (U1 - U5, C1 - C5; see Figures 9.1 through 9.10) 51QC =
Time-Dial (0.50 - 15.00 for curves U1-U5, 0.05 - 1.00 for curves C1-C5) 51QTD =
Electromechanical Reset (Y, N) 51QRS =
* IMPORTANT: See Appendix F for information on setting negative-sequence overcurrent elements.
Load-Encroachment Elements (See Figure 4.2)
(Make the following settings if preceding enable setting ELOAD = Y)
Forward load impedance
(0.05 - 64.00 W secondary {150 V voltage inputs; 5 A nom.})
(0.25 - 320.00 W secondary {150 V voltage inputs; 1 A nom.})
(0.10 - 128.00 W secondary {300 V voltage inputs; 5 A nom.})
(0.50 - 640.00 W secondary {300 V voltage inputs; 1 A nom.})
ZLF =
Reverse load impedance
(0.05 - 64.00 W secondary {150 V voltage inputs; 5 A nom.})
(0.25 - 320.00 W secondary {150 V voltage inputs; 1 A nom.})
(0.10 - 128.00 W secondary {300 V voltage inputs; 5 A nom.})
(0.50 - 640.00 W secondary {300 V voltage inputs; 1 A nom.})
ZLR =
Positive forward load angle (-90.00° to +90.00°) PLAF =
Negative forward load angle (-90.00° to +90.00°) NLAF =
Positive reverse load angle (+90.00° to +270.00°) PLAR =
Negative reverse load angle (+90.00° to +270.00°) NLAR =
Directional Elements (See Directional Control Settings in Section 4)
(Make settings DIR1 - DIR4 and ORDER if preceding enable setting E32 = Y or AUTO)
Level 1 direction: Forward, Reverse, None (F, R, N) DIR1 =
Level 2 direction: Forward, Reverse, None (F, R, N) DIR2 =
Level 3 direction: Forward, Reverse, None (F, R, N) DIR3 =
Level 4 direction: Forward, Reverse, None (F, R, N) DIR4 =
Ground directional element priority: combination of Q, V, I - or OFF ORDER =
Courtesy of NationalSwitchgear.com