Siemens siprotec 7SJ63 - Page 461

Technical Data
10-157SJ63 Manual
C53000-G1140-C120-1
Trip Time Charac-
teristics As Per
ANSI
As per ANSI/IEEE (see also Figures 10-2 and 10-3)
The trip times for I/I
p
≥ 20 are identical to those for I/I
p
= 20.
Pickup Threshold approx. 1.10 · I
p
t
8.9341
II
p
⁄()
2.0938
1
–
---------------------------------------
0.17966
+



D⋅
=
,19(56(
9(5<,19(56(
(;75(0(/<,19(56(
For all Characteristics
t = Trip time in seconds
D = Setting value of the time multiplier
I = Fault Current
I
p
= Setting value of the pickup current
'(),1,7(,19(56(
6+257,19(56(
/21*,19(56(
02'(5$7(/<,19
t
0.2663
II
p
⁄()
1.2969
1
–
---------------------------------------
0.03393
+



D⋅
=
t
5.6143
II
p
⁄()1
–
------------------------
2.18592
+


D⋅
=
t
0.0103
II
p
⁄()
0.02
1
–
----------------------------------
0.0228
+



D⋅
=
t
3.922
II
p
⁄()
2
1
–
---------------------------
0.0982
+



D⋅
=
t
5.64
II
p
⁄()
2
1
–
---------------------------
0.02434
+



D⋅
=
t
0.4797
II
p
⁄()
1.5625
1
–
---------------------------------------
0.21359
+



D⋅
=
[s]
[s]
[s]
[s]
[s]
[s]
[s]
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