Date _______________
Date Code 20080213 Instruction Manual SEL-351A Relay
SET.7
of 32
SEL-351A Settings Sheets
Relay Settings (Serial Port Command SET and Front Panel)
Curve (U1–U5, C1–C5; see Figure 9.1–Figure 9.10) 51CC =
Time-Dial (0.50–15.00 for curves U1–U5,
0.05–1.00 for curves C1–C5)
51CTD =
Electromechanical Reset (Y, N)
51CRS =
Neutral-Ground Time-Overcurrent Element—Channel IN (See Figure 3.18)
(Make the following settings if preceding enable setting E51N = Y.)
Pickup (OFF, 0.500–16.000 A {5 A nom.},
0.100–3.200 A {1 A nom.}, 0.005–0.640 A {0.2 A nom.},
0.005–0.160 A {0.05 A nom.})
51NP =
Curve (U1–U5, C1–C5; see Figure 9.1–Figure 9.10)
51NC =
Time-Dial (0.50–15.00 for curves U1–U5,
0.05–1.00 for curves C1–C5)
51NTD =
Electromechanical Reset (Y, N)
51NRS =
Residual-Ground Time-Overcurrent Element #1 (See Figure 3.19)
(Make the following settings if preceding enable setting E51G = 1 or 2.)
Pickup (OFF, 0.10–16.00 A {5 A nom.},
0.02–3.20 A {1 A nom.})
51GP =
Curve (U1–U5, C1–C5; see Figure 9.1–Figure 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 =
Residual-Ground Time-Overcurrent Element #2 (See Figure 3.20)
(Make the following settings if preceding enable setting E51G = 2.)
Pickup (OFF, 0.10–16.00 A {5 A nom.},
0.02–3.20 A {1 A nom.})
51G2P =
Curve (U1–U5, C1–C5; see Figure 9.1–Figure 9.10)
51G2C =
Time-Dial (0.50–15.00 for curves U1–U5,
0.05–1.00 for curves C1–C5)
51G2TD =
Electromechanical Reset (Y, N)
51G2RS =
Negative-Sequence Time-Overcurrent Element (See Figure 3.21)
IMPORTANT: See Appendix F for information on setting negative-sequence overcurrent elements.
(Make the following settings if preceding enable setting E51Q = Y.)
Pickup (OFF, 0.25–16.00 A {5 A nom.},
0.05–3.20 A {1 A nom.})
51QP =
Curve (U1–U5, C1–C5; see Figure 9.1–Figure 9.10)
51QC =
Time-Dial (0.50–15.00 for curves U1–U5,
0.05–1.00 for curves C1–C5)
51QTD =
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