Operation
7.11 Closed-loop control
SINAMICS DCP
330 Operating Instructions, 09/2019, A5E34382853K
Note
The rated current depends on the specific device, and is specified in Chapter "
Device data
427)".
the following diagrams, the reactor current and/or the current is always shown on the side
For the overload capability of the SI
NAMICS DCP, other load cycles are assumed than for
Using parameter p55080, 3 overload profiles and "no overload" (factory setting) can be
selected:
●
Load profile "increased current" (p55080 = 1)
This load profile is available for the 30 kW and the 120 kW devices.
For the "Increased current" load profile, a continuously higher current up to 120 % of the
rated current is permitted.
The required current increase is set in p55081 (dynamic overload current increase).
In so doing, it is not permissible that the rated device power is exceeded.
However, the temperature-dependent derating (see Chapter "Derating (Page 357)") starts
at a lower ambient temperature than for operation without increased current.
Figure 7-60 Current derating example - internal air intake temperature, p55080 = 1, p55081 = 20 %
Figure 7-61 Current derating example - power unit temperature, p55080 = 1, p55081 = 20 %
As a consequence, this load profile is especially useful for lower ambient temperatures.
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