4.113
Date Code 20170814
Instruction Manual
SEL-700G Relay
Protection and Logic Functions
Group Settings (SET Command)
Figure 4.80
Zero-Sequence Voltage-Polarized Directional Element for
Neutral-Ground Overcurrent Elements
q
From Table 4.28
w
To Figure 4.82
e
From Figure 4.76
IN
3V
0
Forward Threshold = 0.75 • Z0F — 0.25 •
Forward Threshold: Z0F = —0.10 ohm secondary
IN
3V
0
Reverse Threshold = 0.75 • Z0R + 0.25 •
Reverse Threshold: Z0R = 0.10 ohm secondary
Direction Element Characteristics
R0
X0
Forward Threshold
Reverse Threshold
Z0 PLANE
RDIRN
(Reverse)
FDIRN
(Forward)
Settings
ORDER = U
50NF
Enable
Forward
Threshold
DIRNE
Reverse
Threshold
50NR
Re[3V
0
•(IN•1
/
Z0MTA)*]
|IN|
2
Z0 =
IN
3V
0
Relay
Word
Bits
Relay
Word
Bit
Relay
Word
Bit
Relay
Word
Bit
(Neutral)
1
2
3
3
3
Summary of Contents for SEL-700G Series
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