Siemens SINAMICS S120 Equipment Manual page 123

Example 1
u matching transformer = 3%,
k
S
K plant
S
K line
According to a)
S
n1
According to b)
S
n2
The matching transformer requires a rated power S
Example 2
u matching transformer = 1%,
k
S
K plant
S
K line
According to a)
S
n1
According to b)
S
n1
The matching transformer requires a rated power S
Example 3
If S
u matching transformer = 3%,
k
S
K plant
S
K line
According to a)
S
n1
According to b)
S
n2
The matching transformer requires a rated power S
Booksize power units
Manual, (GH2), 06/2008, 6SL3097-2AC00-0BP6
= 50,000 kVA
= 16 kW • 70 • 0.73 = 820 kVA
= 1.27 • 16 kW = 21 kVA
> S ⇒ S is decisive
n1 n2
= 50,000 kVA
= 16 kW • 70 • 0.73 = 820 kVA
= 1.27 • 16 kW = 21 kVA
> S ⇒ S is decisive
n2 n1
is smaller, the transformer must be stronger
K plant
= 3,000 kVA
= 16 kW • 70 • 0.73 = 820 kVA
= 1.27 • 16 kW = 21 kVA
> S ⇒ S is decisive
n1 n2
Line Connection Booksize
2.13 Line connection variants
of 25 kVA at a u of 3%.
n k
of 21 kVA at a u of 1%.
n k
of 34 kVA at a uk of 3%.
n
123