Siemens SINAMICS S120 Manual page 145

Example 3:
If S
K factory
u matching transformer = 3 %
k
S
K factory
S
K line
According to a)
S
n1
According to b)
S
n2
The matching transformer requires a rated power S
of 3%.
Example 4:
If S
K factory
u matching transformer = 1%,
k
S
K factory
S
K line
According to a)
S
n1
According to b)
S
n1
The matching transformer requires a rated power S
of 1%.
Note
S
n2
power drawn from other loads has not been taken into account.
Booksize Power Units
Manual, (GH2), 07/2016, 6SL3097-4AC00-0BP8
is smaller, the transformer must be stronger.
= 3000 kVA
= 16 kW • 70 • 0.73 = 820 kVA
= 1.27 • 16 kW = 21 kVA
> S ⇒ S is decisive
n1 n2
is lower, you can use, alternatively to example 3, a transformer with a lower u
= 3000 kVA
= 16 kW • 70 • 0.73 = 820 kVA
= 1.27 • 16 kW = 21 kVA
> S ⇒ S is decisive
n2 n1
for the matching transformer can be reduced by reducing u
Line connection and line-side power components
3.11 Line connection variants
of 34 kVA for a short-circuit voltage u
n
of 21 kVA for a short-circuit voltage u
n
. In the examples above, the
k
k
.
k
k
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