Descriptions of functions
10.26 Automatic restart
SINAMICS DCM DC Converter
598 Operating Instructions, 12/2018, A5E34763375A
"Automatic restart" means:
When brief interruptions in the network (such as voltage dips) occur, the SINAMICS DC
MASTER does not enter the "FAULT" operating state immediately, but instead blocks the
armature firing pulses before automatically re-enabling them once the network returns to
normal.
"Brief" refers to a time that is: shorter than the time set at p50086 (= hot restart time)
During the brief pulse inhibit period that is initiated when faults occur in the network, the
SINAMICS DC MASTER waits in operating state o4.0 (for power system faults in the
armature circuit) or o5.1 (for power system faults in the field circuit).
If the network does not return to normal during the hot restart time, the relevant fault is
triggered as soon as it elapses.
The following faults relate to the "Automatic restart" function:
Armature circuit phase failure (1U1, 1V1, 1W1)
Field circuit phase failure (3U1, 3W1)
Undervoltage (armature current or field current)
Overvoltage (armature current or field current)
Line frequency too low (armature current or field current)
Line frequency too high (armature current or field current)
Note
There is no automatic restart when the electronics power supply fails.
Operation on a single-phase line supply
SINAMICS DCM converters can also be operated on single-phase line supplies.
Fields 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
-phase operation, dynamic overload of the devices is not possible. The I
2
t
monitoring must be deactivated (p50075=0). If the I
2
t monitoring is activated, for single-
phase operation, fault 60058 is output with fault value 4.
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