Schweitzer Engineering Laboratories SEL-311C - Figure 4.8 Best Choice Ground Directional Logic

4.13
Date Code 20060320 Instruction Manual SEL-311C Relay
Loss-of-Potential, CCVT Transient Detection, Load-Encroachment, and Directional Element Logic
Directional Control for Ground Distance and Residual Ground Overcurrent Elements
f
q From Figure 4.6; w from Figure 4.7; e Figure 4.9; r Figure 4.10; t Figure 4.11.
Figure 4.8 Best Choice Ground Directional Logic
ORDER
Directional Element
Priority (setting)
Directional
Element Enables
(Relay Word Bits)
32QGE
(q)
32VE
32IE
w
position 1
internal enable
asserted?
ORDER
= 1 2 or
1 2 3?
position 2
internal enable
asserted?
position 3
internal enable
asserted?
ORDER
= 1 2 3 ?
N
Y
N
Y
N
NY
N
Y
Y
no ground
directional
element
enabled
ORDER = 1,
1 2,
or 1 2 3
where any
combination
of Q, V, and I
is set in positions
1, 2, or 3 for ground
directional element priority
Q: 32QGE
V: 32VE
I: 32IE
Best Choice Ground
Directional enable output
Enable ground directional
element that corresponds
to position 1 internal enable
32QGE
32VE
32IE
e
r
t
Best Choice Ground
Directional enable output
Enable ground directional
element that corresponds
to position 3 internal enable
32QGE
32VE
32IE
e
r
t
Best Choice Ground
Directional enable output
Enable ground directional
element that corresponds
to position 2 internal enable
32QGE
32VE
32IE
e
r
t