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

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4.98
SEL-700G Relay Instruction Manual Date Code 20170814
Protection and Logic Functions
Group Settings (SET Command)
conform to IEEE C37.112-1996, IEEE Standard Inverse-Time Characteristic
Equations for Overcurrent Relays.
Relay Word Bit ORED51T
Relay Word bit ORED51T is asserted if any of the Relay Word bits 51PXT,
51QXT, 51GXT, 51PYT, 51QYT, 51GYT, OR 51NT are asserted.
Table 4.25 Equations Associated With U.S. Curves
Curve Type Operating Time Reset Time Figure
U1 (Moderately Inverse) Figure 4.62
U2 (Inverse) Figure 4.63
U3 (Very Inverse) Figure 4.64
U4 (Extremely Inverse) Figure 4.65
U5 (Short-Time Inverse) Figure 4.66
Table 4.26 Equations Associated With IEC Curves
Curve Type Operating Time Reset Time Figure
C1 (Standard Inverse) Figure 4.67
C2 (Very Inverse) Figure 4.68
C3 (Extremely Inverse) Figure 4.69
C4 (Long-Time Inverse) Figure 4.70
C5 (Short-Time Inverse) Figure 4.71
t
p
TD 0.0226
0.0104
M
0.02
1 –
---------------------- +
 
 
• = t
r
TD
1.08
1 M
2
–
----------------
 
 
• =
t
p
TD 0.180
5.95
M
2
1 –
---------------- +
 
 
• =
t
r
TD
5.95
1 M
2
–
----------------
 
 
• =
t
p
TD 0.0963
3.88
M
2
1 –
---------------- +
 
 
• =
t
r
TD
3.88
1 M
2
–
----------------
 
 
• =
t
p
TD 0.0352
5.67
M
2
1 –
---------------- +
 
 
• = t
r
TD
5.67
1 M
2
–
----------------
 
 
• =
t
p
TD 0.00262
0.00342
M
0.02
1 –
---------------------- +
 
 
• =
t
r
TD
0.323
1 M
2
–
----------------
 
 
• =
where:
t
p
=
t
r
=
TD =
M =
operating time in seconds
electromechanical induction-disk emulation reset time in seconds (if you select electromechanical reset setting)
time-dial setting
applied multiples of pickup current [for operating time (t
p
), M>1; for reset time (t
r
), M

1]
t
p
TD
0.14
M
0.02
1 –
----------------------
 
 
• = t
r
TD
13.5
1 M
2
–
----------------
 
 
• =
t
p
TD
13.5
M 1 –
--------------
 
 
• = t
r
TD
47.3
1 M
2
–
----------------
 
 
• =
t
p
TD
80
M
2
1 –
----------------
 
 
• = t
r
TD
80
1 M
2
–
----------------
 
 
• =
t
p
TD
120
M 1 –
--------------
 
 
• =
t
r
TD
120
1 M –
--------------
 
 
• =
t
p
TD
0.05
M
0.04
1 –
----------------------
 
 
• = t
r
TD
4.85
1 M
2
–
----------------
 
 
• =
where:
t
p
=
t
r
=
TD =
M =
operating time in seconds
electromechanical induction-disk emulation reset time in seconds (if you select electromechanical reset setting)
time-dial setting
applied multiples of pickup current [for operating time (t
p
), M>1; for reset time (t
r
), M

1]