Schweitzer Engineering Laboratories SEL-700G Series, Инструкция по эксплуатации

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4.121
Date Code 20170814 Instruction Manual SEL-700G Relay
Protection and Logic Functions
Group Settings (SET Command)
Figure 4.90 Direction Forward/Reverse Logic for Phase Overcurrent Elements
Directional Control Settings
The directional control for overcurrent elements is enabled by making
directional control enable setting EDIR. Setting EDIR has setting choices:
If directional control enable setting EDIR := N, directional control is disabled
and no directional control settings are made. All level direction settings are set
internally as:
With these settings, the directional control outputs in Figure 4.83, Figure 4.84,
Figure 4.89, and Figure 4.90 assert to logical 1. The overcurrent elements
referenced in Figure 4.83, Figure 4.84, Figure 4.89, and Figure 4.90 are then
not controlled by the directional control logic.
q
From Figure 4.88
w
Figure 4.58
e
Figure 4.54
Directional
Control
Level
Direction
Settings
DIRPF
DIR1 = F
DIR1 = N
Relay
Word
Bit
Relay
Word
Bit
to Phase
Time-0vercurrent
Elements
to Phase
Instantaneous/
Definite-TIme
Overcurrent
Elements
Forward
Forward
DIRPR
Reverse
Level 1
DIR1 = R
Reverse
DIR2 = F
DIR2 = N
Forward
Level 2
DIR2 = R
Reverse
1
2
3
1
PY1DIR
PY2DIR
Y Enable directional control
N Disable directional control
AUTO Enable directional control and set many of the directional
element settings automatically
DIR1 := N (no directional control for Level 1 overcurrent elements)
DIR2 := N (no directional control for Level 2 overcurrent elements)
Table 4.31 Directional Element Settings for X Side and Y Side (Sheet 1 of 3)
Setting Prompt Setting Range
Setting Name :=
Factory Default
X Side
DIR CONTROL ENBL Y, AUTO
a
, N EDIRX := N
FWD DIR ON LOP Y, N EFWDLOPX := Y
POS SQ LN Z MAG 0.10–510.00 ohm
b
Z1MAGX := 2.14
POS SQ LN Z ANG 50.00–90.00 deg Z1ANGX := 68.86