Siemens SINAMICS S220

8.3.6.4 Permissible output current at low frequencies
Technical data
The following diagram shows the permissible output current as a function of the output
frequency when operating with low output frequencies.
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Figure8-23 Output current at low frequencies
For applications with a constant load, e.g. in paper machines, rolling mills etc., the output
current can be reduced as a function of the output frequency. To do this, the pulse frequency
must be set to a frequency less than 4 kHz.
Additional conditions for operation at low output frequencies:
• The output current reduction does not apply to acceleration from zero speed if an output
frequency of >10Hz is reached within 100ms. A reduction of the output current must be
taken into consideration if, at frequencies <10 Hz, the operating time exceeds 2 % of the daily
operating time.
• The D type characteristic is only applicable for a pulse frequency ≤4 kHz. For 8/16 kHz, the C
type characteristic should be used taking into account the relevant reduction of the output
current.
• For drive systems with induction motors (with slip frequency), the permissible continuous
load at zero speed (e.g. suspended axis without counterweight or travel to 󹪝xed stop):
– 75% von I
rated
for D type
– 50% of I
n
for C type Motor Modules with a pulse frequency ≥4kHz
– 65% of I
n
for C type Motor Modules with a pulse frequency ≥2.5kHz
8.3.7 Mounting the Motor Module
Overview
Motor Modules are designed for installation in the control cabinet. They are 󹪝xed to the control
cabinet panel or a mounting panel.
Motor Modules
8.3Motor Modules 3 ... 30 A and 2x3 ... 2x18 A
Booksize power units
172 Equipment Manual, 09/2023, A5E53307519B AA