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GB
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Ru
24 | AQ450740142615en-000201
© Danfoss | Climate Solutions | 2023.07
For safe operation of the compressor, the frequency converter must be able to apply an overload of
at least 140% of the compressor's maximum current (I-max.) for at least 3 seconds.
When
using frequency converters
, the following things must also be observed:
1. The maximum permissible operating current of the compressor (I-max) (see type plate or
technical data) must not be exceeded.
2. If abnormal vibrations occur in the system, the affected frequency ranges in the frequency
converter must be blanked out accordingly.
3. The maximum output current of the frequency converter must be greater than the maximum
current of the compressor (I-max).
4. Carry out all designs and installations in accordance with the local safety regulations and
common rules (e.g. VDE) and regulations as well as in accordance with the specifications of the
frequency converter manufacturer
The permissible frequency range can be found in the technical data.
5.10
Selection and operation of compressors with frequency converters
f-min/f-max see chapter: Technical data: adjustable frequency range
Rotational speed
range
0 - f-min
f-min - f-max
Start-up time
< 1 s
ca. 4 s
Switch-off time
immediately
5
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Electrical connection
