Schweitzer Engineering Laboratories SEL-387E - Page 252

SEL-387E Relay Settings Sheet Page 10 of 28
Group Settings (SET Command) Example Date
Group
Date Code 20080110
51N3 Torque Control (SEL OGIC control equation)
51N3TC = 1
W
INDING 3 D EMAND M ETERING
Demand Ammeter Time Constant (OFF, 5–255 min) DATC3 = 15
Phase Demand Ammeter Threshold
(0.5–16.0 A secondary) (5 A) PDEM3P = 7.00
(0.1–3.2 A secondary) (1 A) 1.40
Neg.-Seq. Demand Ammeter Threshold
(0.5–16.0 A secondary) (5 A) QDEM3P = 1.00
(0.1–3.2 A secondary) (1 A) 0.20
Residual Demand Ammeter Threshold
(0.5–16.0 A secondary) (5 A) NDEM3P = 1.00
(0.1–3.2 A secondary) (1 A) 0.20
C OMBINED O/C E LEMENTS
Note: The combined overcurrent elements uses a normalization factor which scales the
secondary current magnitude to the larger of the two winding CT Ratios. See 51PC1 and 51NC1
Combined Overcurrent Elements in Section 3 for details and examples of the combined
overcurrent elements.
W1–W2 P
HASE O/C E LEMENT
W1–W2 Phase Inv.-Time O/C PU
(OFF, 0.5–16.0 A secondary) (5 A) 51PC1P = 4.00
(OFF, 0.1–3.2 A secondary) (1 A) 0.80
W1–W2 Phase Inv.-Time O/C Curve (U1–U5, C1–C5) 51PC1C = U2
W1–W2 Phase Inv.-Time O/C Time-Dial (US 0.5–15.0, IEC 0.05–1.00) 51PC1TD = 3.00
W1–W2 Phase Inv.-Time O/C EM Reset (Y, N) 51PC1RS = Y
W1–W2 R ESIDUAL O/C E LEMENT
W1–W2 Residual Inv.-Time O/C PU
(OFF, 0.5–16.0 A secondary) (5 A) 51NC1P = 1.00
(OFF, 0.1–3.2 A secondary) (1 A) 0.20
W1–W2 Residual Inv.-Time O/C Curve (U1–U5, C1–C5) 51NC1C = U2
W1–W2 Residual Inv.-Time O/C Time-Dial (US 0.5–15.0, IEC 0.05–1.00) 51NC1TD = 3.00
W1–W2 Residual Inv.-Time O/C EM Reset (Y, N) 51NC1RS = Y