Marine-Specific Application Conditions - Siemens SINAMICS G120 Applications Manual

Marine-specific application conditions

The converters discussed here are designed for indoor installation.
The ambient conditions / general conditions on marine vessels generally differ from those in
industrial plants/systems. This fact must be taken into consideration when engineering
orders.
Special attention must be given to the following:
● Temperature
The components discussed here involve built-in types that are integrated in control
cabinets.
On board marine vessels, generally ambient temperatures (outside the cabinet) of
0 ... 45 °C can be expected. Depending on the power loss in the cabinet, the
performance of the cooling equipment and the installation position in the cabinet, the
ambient temperature of a component in the cabinet is above the temperature of the
cooling air fed into the cabinet (outside of the cabinet)
This is to be carefully taken into consideration when engineering converter systems. It
may be necessary to reduce the power (derating) when dimensioning the drive.
Reference is made to derating notes in the underlying documentation (see "Referencing
the standard documentation of the components (Page 17)").
● Humidity/condensation
Generally, it should be assumed that condensation can occur on board marine vessels.
Condensation is not permissible for the built-in types considered here.
If necessary, technical measures must be applied inside the cabinet to ensure that
condensation does not occur (e.g. IP54 degree of protection, cabinet heating).
● Salt mist
The occurrence of salt mist is not permissible.
● Vibration stress
The onboard propulsion systems can transfer vibration to the converters installed
onboard. This vibration stress can occur over long periods of time, or occur repeatedly
and have a specific frequency/frequencies.
This necessitates a special, reinforced control cabinet design, see Chapter "Reinforced
control cabinet design (Page 26)".
For this reason it is generally necessary to install the Control Unit offset off the Power
Module.
A CU230P-2 or CU240E-2 can be plugged directly onto a PM240-2 Power Module of
frame size FSA, FSB, or FSC.
● EMC interference immunity
The converters considered here are suitable for applications in the 2nd environment
according to IEC 61800-3, and comply with marine-specific requirements relating to
interference immunity according to IEC 60533. The precondition here is that the devices
are installed in a control cabinet. An optional operator panel (BOP-2, IOP-2) must be
installed in the control cabinet doors.
Using SINAMICS G120 / G120C / S120 Blocksize converters in marine applications
Application Manual, 11/2019, A5E48346362A
7
23