SIEMENS
SINAMICS DCM
Engineering information
Dynamic overload capability
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Siemens D 23.1 · 2014
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Overview
(continued)
6RA8097-4KS22-0AA0 2600 A/two-quadrant operation 690 V, 6RA8097-4KV62-0AA0 2600 A/four-quadrant operation 690 V
6RA8098-4DS22-0AA0 3000 A/two-quadrant operation 400 V, 6RA8098-4DV62-0AA0 3000 A/four-quadrant operation 400 V
Load classes
In order to be able to adapt the SINAMICS DC MASTER as
simply as possible to the load profile of the driven machine,
in addition to the individual dimensioning using the limiting
characteristics of the dynamic overload capability, these can
also be dimensioned using pre-selected load cycles that are
simple to parameterize.
Note:
SINAMICS DC MASTER does not
monitor whether the load class
– set using parameters – is maintained. If the power section
permits it, the unit can operate for overload durations in excess
of those defined by the load class. This means that the driven
machine of the mechanical system is not protected against over-
load!
The overload duration that is actually permitted for the power
section in question is always longer than the duration defined by
the load class. SINAMICS DC MASTER monitors
whether the
overload duration that is actually permitted for the power section
is being maintained.
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More information
For further information, please go to the following website address:
300
200
250
100
150
50
0
50
40
30
20
10
0
100
%
90
80
70
60
x=1.1
x=1.2
x=1.3
x=1.4
x=1.5
x=1.8
296
168
109
74
53
23
x=1.1
x=1.2
x=1.3
x=1.4
x=1.5
x=1.8
Overload with x-times
rated DC current
(s)
an
(s) = 465
ab
Overload duration in s for 300 s cycle duration
Base-load current as a % of the rated DC current
G_D023_EN_00057
t
t
300
200
250
100
150
50
0
50
40
30
20
10
0
100
%
90
80
70
60
x=1.1
x=1.2
x=1.3
x=1.4
x=1.5
x=1.8
282
160
103
70
50
21
x=1.1
x=1.2
x=1.3
x=1.4
x=1.5
x=1.8
Overload with x-times
rated DC current
(s)
an
(s) = 465
ab
Overload duration in s for 300 s cycle duration
Base-load current as a % of the rated DC current
G_D023_EN_00058
t
t
© Siemens AG 2014