Siemens SINAMICS S120 Engineering Manual page 16

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1 Engineering SINAMICS S120 Booksize

1.3.4.3

Calculations

Supporting calculations

The rated apparent power of the Line Module is:

��

= ��

��

The specific reactance value of the medium-voltage cable is obtained as follows:

��'

= 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 reactance of the low-voltage cable is calculated as follows:

��'

= 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 reactance value of the converter connecting cable is calculated as follows:

��'

= 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

∙ ��

∙ √ 3

133.02

��

0.00032987

1.649335

1.225417

0.00008011

0.002003

0.002315

0.00008011

0.002804

0.008643

kVA

��

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Siemens SINAMICS S120 Engineering Manual page 16

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