4.36
SEL-751 Relay Instruction Manual Date Code 20170927
Protection and Logic Functions
Group Settings (SET Command)
q From Figure 4.73; w From Figure 4.24; e to Figure 4.26 and Figure 4.37;
r to Figure 4.37 and Figure 4.38; t to Figure 4.25, Table 4.19, and Table 4.20.
Figure 4.23 Internal Enables (DIRQE and DIRQGE) Logic for Negative-
Sequence Voltage-Polarized Directional Elements
|3I
2
|
|I
2
|
a2 • |I
1
|
k2 • |I
0
|
|I
2
|
Settings
Settings
50QFP
50QRP
50QR
50QF
DIRVE
DIRIE
DIRQE
(Internal Enable
"Q" Listed in
Setting ORDER
Setting Enable
DIRQGE
(Internal Enable
(I
0
= I
G/3
)
LOP
Loss-of-Potential
Setting
VNOM = OFF
Relay
Word
Bits
Relay
Word
Bit
Relay
Word
Bits
1
2
3
4
5