Siemens SINAMICS S120 - Page 122

Line Connection Booksize
2.13 Line connection variants
Booksize power units
122 Manual, (GH2), 06/2008, 6SL3097-2AC00-0BP6
From S
K transformer
, the required rated power of the matching transformer can be calculated.
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Note
The system fault level (short-circuit power) at the plant connection S
K plant
plays a decisive
role in dimensioning/selecting the matching transformer.
From the rated power (S
n1
or S
n2
) calculated under a) and b), the higher value must be
used for the matching transformer.
Table 2-43 Transformer configuration instructions
Used
Active Line Module P
n
Required rated power Sn of
the isolating/autotransformer
Required short-circuit
voltage uk
Required system fault level
S
K line
16 kW Sn ≥ 21 kVA uk ≤ 3% S
K line
≥ 1.12 MVA
36 kW Sn ≥ 46 kVA uk ≤ 3% S
K line
≥ 2.52 MVA
55 kW Sn ≥ 70 kVA uk ≤ 3% S
K line
≥ 3.85 MVA
80 kW Sn ≥ 102 kVA uk ≤ 3% S
K line
≥ 5.6 MVA
120 kW Sn ≥ 153 kVA uk ≤ 3% S
K line
≥ 8.4 MVA
Used
Smart Line Module Pn
Required rated power Sn of
the isolating/autotransformer
Required short-circuit
voltage uk
Minimum system fault level
S
K line
required
5 kW Sn ≥ 6.4 kVA uk ≤ 3% S
K line
≥ 0.35 MVA
10 kW Sn ≥ 13 kVA uk ≤ 3% S
K line
≥ 0.7 MVA
16 kW Sn ≥ 21 kVA uk ≤ 3% S
K line
≥ 1.12 MVA
36 kW Sn ≥ 46 kVA uk ≤ 3% S
K line
≥ 2.52 MVA
Used Basic Line Module Required rated power Sn of
the isolating/autotransformer
Required short-circuit
voltage uk
Minimum system fault level
S
K line
required
20 kW Sn ≥ 26 kVA uk ≤ 10% S
K line
≥ 1.4 MVA
40 kW Sn ≥ 51 kVA uk ≤ 10% S
K line
≥ 2.8 MVA
100 kW Sn ≥ 127 kVA uk ≤ 10% S
K line
≥ 7.0 MVA
Note
Ask your relevant energy provider for the system fault level S
K line
.