1 Engineering SINAMICS S120 Booksize
In the next step, you can define the selected apparent power of the transformer in order to determine the resulting RSC.
ℎ _
its impedance together with the selected u
=
ℎ
The short-circuit power at the connection point IPC is therefore obtained as:
''
=
_
+
With the selected matching transformer, a relative short-circuit power at the connection point IPC is therefore obtained as:
''
_
=
Further, the expected short-circuit currents at connection point IPC can be determined:
''
_
''
=
_
√3∙
√3
''
=
∙ ''
2_
_
2
Engineering manual S120 Booksize
Entry-ID: 109808992,
V1.0,
04/2022
=
480.0000
is obtained as:
k
_ℎ
=
8.333
ℎ _
1.1
+
+
+
−
−
ℎ
39
=
=
7.518
kA
=
6.511
kA
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kVA
%
=
5.209
+
−
MVA
19