Siemens SINAMICS DCM Manual page 560

10.26 Operation on a single-phase line supply
SINAMICS DCM converters with rated DC currents of up to 125 A and a rated armature
supply voltage of 575 V can also be operated on single-phase line supplies.
Areas of application for this operating mode include
● Replacement of older single-phase converters employing analog technology
● Plants and systems where there is no 3-phase line supply
● Presenting and demonstrating SINAMICS DCM in seminar hotels and demonstration
rooms where generally there is no three-phase line supply
Note
For single-phase operation, dynamic overload of the devices is not possible. The I
monitoring must be deactivated (p50075=0). If the I
phase operation, fault 60058 is output with fault value 4.
Connection
Figure 10-77 Connection to a single-phase line supply
The converter is connected to the line supply (one phase and the neutral conductor, e.g.
230 V or two phase conductors of a three-phase line supply, e.g. 400 V) via terminals 1U1
and 1V1. Connection 1W1 remains free.
It is mandatory that a single-phase line reactor or a transformer with 4% u
only supplies the DC converter involved.
Commutating reactor and transformer should be selected according to the rated motor
current of the armature circuit.
In this B2 circuit, the line current is equal to the DC current in the armature circuit. All of the
other line-side drive components should be dimensioned according to this. Further, due to
the higher current ripple when compared to six-pulse operation, a smoothing reactor must be
provided in the DC circuit. Please contact the motor manufacturer when dimensioning the
smoothing reactor.
SINAMICS DCM DC Converter
Operating Instructions, 02.2015, A5E34763375/RS-AA/001
10.26 Operation on a single-phase line supply
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Descriptions of functions
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