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

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4.101
Date Code 20170814 Instruction Manual SEL-700G Relay
Protection and Logic Functions
Group Settings (SET Command)
Directional Elements
The directional control for overcurrent elements is enabled by making
directional control enable setting EDIRX and EDIRY for X and Y sides,
respectively. For simplicity, the following descriptions do not necessarily
show X and Y in various settings, Relay Word bits, and figures. X and Y sides
are explicitly shown in the Relay Word bits and figures wherever necessary.
Setting EDIR and other directional control settings are described in
Directional Control Settings on page 4.121.
Directional Control for Residual and Neutral Overcurrent Elements
Three directional elements (items 1, 2 and 3 listed below) are available to
control the residual-ground overcurrent elements and one directional element
(item 4 listed below) to control the neutral-ground overcurrent (IN) elements.
Not all are available simultaneously. These four directional elements are:
1. Negative-sequence voltage-polarized directional element
2. Zero-sequence voltage-polarized directional element (with IG
as operate quantity)
3. Channel
IN
current-polarized directional element
4. Zero-sequence voltage-polarized directional element (with
IN
as operate quantity)
See Figure 4.72 and Figure 4.73 for an overview of how these directional
elements are enabled and routed to control the residual-ground overcurrent
elements and neutral-ground overcurrent elements respectively. Note in
Figure 4.72 and Figure 4.73 that the ORDER setting enables the directional
Figure 4.70 IEC Long-Time Inverse Curve: C4 Figure 4.71 IEC Short-Time Inverse Curve: C5
0.20
0.10
0.05
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
.7 .6 .5
.1
.9 .8 1
.4
.2
.3
.5
.6
.8
.7
.9
1
2
3
4
5
7
6
4 2 3 7 6 5 10 9 8
40 20 30 70 50 60 80 90 100
50
9
8
10
20
30
40
300
200
100
80
60
70
90
1000
900
800
700
600
500
400
Time in Seconds
Multiples of Pickup
Time in Cycles 60 Hz (50Hz)
30 (25)
60 (50)
150 (125)
300 (250)
3000 (2500)
600 (500)
1500 (1250)
6000 (5000)
15000 (12500)
30000 (25000)
60000 (50000)
10
20
30
40
50
60
70
80
90
100
1
2
3
4
5
6
7
8
9
.1
.2
.3
.4
.5
.6
.7
.8
.9
.01
.02
.03
.04
.05
.06
.07
.08
.09
100
1 2 3 4 5 6 7 8 9 .5 .6 .7 .8 .9
90 80
70
60 50 40
30 20
10
Time in S
ec
onds
Time in C
ycle
s 60 Hz (50 Hz
)
6000 (5000)
3000 (2500)
1500 (1250)
600 (500)
300 (250)
150 (125)
60 (50)
30 (25)
15 (12.5)
6 (5)
3 (2.5)
Multiples of Pickup
0.05
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.90
1.00