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● The circuit breaker is controlled and enabled from the closed-loop control. If this has not
● To protect the converter transformer, ensure that overcurrent protection is in place.
3.5.10
Converter transformer
A two-winding transformer is required for each Active Line Module. When two complete drive
units are connected in parallel, a three-winding transformer with shifted windings can be used
for suppressing line harmonics.
Consider the following properties during the configuration:
● Transformer secondary voltage:
● Minimum leakage inductance: 1 mH
● Transformer taps for voltage adjustments: 2 x +/- 2.5%. The winding taps are usually located
Design the transformer for the following loads:
● Max. dU/dt stress at the converter input terminals: 6 kV/µS
● Peak voltage load phase-phase and phase-ground:
● Current load with DC component: approx. 4 A to 5 A
3.5.11
Actual value acquisition
Actual current and voltage values are recorded by the AVT combination module
combination module converts analog signals into digital signals and forwards them to the PSA.
The signals are transferred to the PSA via fiber-optic cables.
SINAMICS SM150 6SL3815-7NP41-0AA1
Operating Instructions Rev.201910281301 EXAMPLE
been enabled, under no circumstances should you close the circuit breaker using external
mechanical or electrical means.
– 3.3 kV
– 4.16 kV
u
(short-circuit voltage
This value includes all the inductance between the line and the converter: Line short-circuit
inductance, transformer inductance, reactor inductance.
on the high voltage side of the transformer.
– With 3.3 kV converters = 8.4 kV
– With 4.16 kV converters = 10.5 kV
≥ 15% depending on transformer output)
k
3.5 Description of the components
①
Description
. The AVT
37
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