SET.2
of 32
SEL-351A Settings Sheets
Relay Settings (Serial Port Command SET and Front Panel)
SEL-351A Relay Instruction Manual Date Code 20080213
Date________________
(Make settings Z0SMAG and Z0SANG when global settings PTCONN = DELTA and VSCONN = VS.)
Zero-sequence source impedance magnitude (delta-connected
voltages)
(0.10–510.00 Ω secondary {5 A nom.})
(0.50–2550.00 Ω secondary {1 A nom.})
Z0SMAG =
Zero-sequence source impedance angle (delta-connected
voltages)
(0.00–90.00 degrees)
Z0SANG =
Line length (0.10–999.00, unitless)
LL =
Instantaneous/Definite-Time Overcurrent Enable Settings
Phase element levels (N, 1–6) (see Figure 3.1, Figure 3.2,
Figure 3.3, and Figure 3.7)
E50P =
Neutral-ground element levels—channel IN (N, 1–6)
(see Figure 3.8 and Figure 3.9)
E50N =
Residual-ground element levels (N, 1–6) (see Figure 3.10 and
Figure 3.11)
E50G =
Negative-sequence element levels (N, 1–6) (see Figure 3.12 and
Figure 3.13)
E50Q =
Time-Overcurrent Enable Settings
Phase elements (N, 1, 2) (see Table 3.1, Figure 3.14,
Figure 3.15, Figure 3.16, and Figure 3.17)
E51P =
Neutral-ground elements—channel IN (Y, N) (see Figure 3.18)
E51N =
Residual-ground elements (N, 1, 2) (see Figure 3.19 and
Figure 3.20)
E51G =
Negative-sequence elements (Y, N) (see Figure 3.21)
E51Q =
Other Enable Settings
(When VNOM = OFF, and the relay has a 0.2 or 0.05 A nominal neutral rating, and global setting VSCONN = VS, setting
E32 can only be set to “N.”)
Directional control (Y, AUTO, N) (see Directional Control
Settings (Not in SEL-351A-1) on page 4.38)
E32 =
(When VNOM = OFF, setting ELOAD can only be set to “N.”)
Load encroachment (Y, N) (see Figure 4.2) ELOAD =
Switch-onto-fault (Y, N) (see Figure 5.3)
ESOTF =
Voltage elements (Y, N) (see Figure 3.22, Figure 3.23,
Figure 3.24, Figure 3.25, and Figure 3.26)
EVOLT =
(When global setting VSCONN = 3V0, setting E25 can only be set to “N.”)
Synchronism check (Y, N) (see Figure 3.27 and Figure 3.28) E25 =
Courtesy of NationalSwitchgear.com
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