Schweitzer Engineering Laboratories SEL-751 - Table 4.24 Directional Control Settings Not Made for Particular Conditions; Table 4.25 Overcurrent Elements Controlled by Level Direction Settings DIR1 through DIR4 (Corresponding Overcurrent Element Figure Numbers in Parentheses)

4.56
SEL-751 Relay Instruction Manual Date Code 20170927
Protection and Logic Functions
Group Settings (SET Command)
Not all these directional control settings (set automatically or by the user) are
used in every application. The following are directional control settings that
are hidden/not made for particular conditions:
Settings
DIR1—Level 1 Overcurrent Element Direction Setting
DIR2—Level 2 Overcurrent Element Direction Setting
DIR3—Level 3 Overcurrent Element Direction Setting
DIR4—Level 4 Overcurrent Element Direction Setting
Setting Range:
F = Direction Forward
R = Direction Reverse
N = Nondirectional
Table 4.25 shows the overcurrent elements that are controlled by each level
direction setting. Note in Table 4.25 that all the time-overcurrent elements
(51_T elements) are controlled by the DIR1 level direction setting.
Figure 4.34, Figure 4.35, Figure 4.40, and Figure 4.41 show the logic imple-
mentation of the control listed in Table 4.25.
Table 4.24 Directional Control Settings Not Made for Particular Conditions
Settings hidden/not made: for condition:
50PDIRP setting ELOAD := Y
50GFP, 50GRP, a0 setting ORDER does not contain V or I
Z0F, Z0R, Z0MTA setting ORDER does not contain V or S
59RES, DIRWFP, DIRWRP,
DIRWD
setting ORDER does not contain P
50NFP, 50NRP, a0N setting ORDER does not contain S or U
KGN, INMTA setting ORDER does not contain I or EDIR := AUTO
INMTA setting KGN := OFF
Table 4.25 Overcurrent Elements Controlled by Level Direction Settings DIR1 Through DIR4 (Corresponding
Overcurrent Element Figure Numbers in Parentheses)
Level
Direction
Settings
Phase Neutral Ground Residual Ground Negative-Sequence
DIR1 67P1P (Figure 4.2)
67P1T (Figure 4.2)
51P1P (Figure 4.6)
51P1T (Figure 4.6)
51P2P (Figure 4.6)
51P2T (Figure 4.6)
67N1P (Figure 4.2)
67N1T (Figure 4.2)
51N1P (Figure 4.8)
51N1T (Figure 4.8)
51N2P (Figure 4.8)
51N2T (Figure 4.8)
67G1P (Figure 4.2)
67G1T (Figure 4.2)
51G1P (Figure 4.9)
51G1T (Figure 4.9)
51G2P (Figure 4.9)
51G2T (Figure 4.9)
67Q1P (Figure 4.2)
67Q1T (Figure 4.2)
51QP (Figure 4.7)
51QT (Figure 4.7)
DIR2 67P2P (Figure 4.2)
67P2T (Figure 4.2
67N2P (Figure 4.2)
67N2T (Figure 4.2)
67G2P (Figure 4.2)
67G2T (Figure 4.2)
67Q2P (Figure 4.2)
67Q2T (Figure 4.2)
DIR3 67P3P (Figure 4.2)
67P3T (Figure 4.2)
67N3P (Figure 4.2)
67N3T (Figure 4.2)
67G3P (Figure 4.2)
67G3T (Figure 4.2)
67Q3P (Figure 4.2)
67Q3T (Figure 4.2)
DIR4 67P4P (Figure 4.2)
67P4T (FFigure 4.2)
67N4P (Figure 4.2)
67N4T (Figure 4.2)
67G4P (Figure 4.2)
67G4T (Figure 4.2)
67Q4P (Figure 4.2)
67Q4T (Figure 4.2)