Siemens siprotec 7SJ63 - Page 470

Technical Data
10-24 7SJ63 Manual
C53000-G1140-C120-1
Trip Time Charac-
teristics As Per
IEC 60255–3
See also Figure10-4
Trip Time Charac-
teristics As Per
ANSI
See Also Figure10-5
The trip times for I
2
/I
2p
≥ 20 are identical to those for I
2
/I
2p
= 20.
Pickup Threshold approx. 1.10 · I
2p
Tolerances Pickup Current I
2p
3% of set value or 50 mA
Time for 2 ≤ I
2
/I
2p
≤ 20 5% of reference (calculated) value + 2 %
current tolerance, or 30 ms
1
) For I
N
= 1 A, divide all limits and increments by 5.
t
0.14
I
2
I
2p
⁄()
0.02
1
–
----------------------------------------
T
I2p
⋅
=
,(&1250$/,19(56(
t
13.5
I
2
I
2p
⁄()
1
1
–
---------------------------------
T
I2p
⋅
=
,(&9(5<,19(56(
t
80
I
2
I
2p
⁄()
2
1
–
---------------------------------
T
I2p
⋅
=
,(&(;75(0(/<,19(56(
Where:
t trip time in seconds
T
I2p
setting value of the time multiplier
I
2
negative sequence currents
I
2p
setting value of the pickup current
for 1.1 < (I
2
/I
2p
) ≤ 20
[s]
[s]
[s]
t
8.9341
I
2
I
2p
⁄()
2.0938
1
–
---------------------------------------------
0.17966
+



D
I2p
⋅
=
$16,,19(56(
t
0.0103
I
2
I
2p
⁄()
0.02
1
–
----------------------------------------
0.0228
+



D
I2p
⋅
=
$16,02'(5$7(/<
t
5.64
I
2
I
2p
⁄()
2
1
–
---------------------------------
0.02434
+



D
I2p
⋅
=
$16,(;75(0(/<
Where:
t trip time in seconds
D
I2p
setting value of the time multiplier
I
2
negative sequence currents
I
2p
setting value of the pickup current
for 1.1 < (I
2
/I
2p
) ≤ 20
t
3.922
I
2
I
2p
⁄()
2
1
–
---------------------------------
0.0982
+



D
I2p
⋅
=
$16,9(5<,19(56(
,19(56(
,19(56(
[s]
[s]
[s]
[s]
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