1 Engineering SINAMICS S120 Booksize
1.3.5.3
Calculations
Supporting calculations
The rated apparent power of the Line Module is:
=
The specific conductance value of the medium-voltage cable is:
'
= 2 ∙ ∙ '
In turn, the reactance of the medium-voltage cable is calculated as follows:
= '
∙
The active resistance of the medium-voltage cable is calculated as follows:
=
∙
The specific conductance value of the low-voltage cable is:
'
= 2 ∙ ∙ '
In turn, the reactance of the low-voltage cable is calculated as follows:
= '
∙
The active resistance of the low-voltage cable is calculated as follows:
=
∙
The specific conductance value of the converter connecting cable is calculated to be:
'
= 2 ∙ ∙ '
In turn, the reactance of the converter connecting cable is calculated as follows:
= '
∙
The active resistance of the converter connecting cable is calculated as follows:
=
∙
Engineering manual S120 Booksize
Entry-ID: 109808992,
V1.0,
04/2022
© Siemens AG 2022 All rights reserved
∙
∙ √ 3
=
133.02
0.00032987
=
1.649335
=
=
1.225417
=
0.00008011
=
0.004406
0.000509
=
=
0.00008011
=
0.002804
=
0.008643
kVA
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
25