Safety information
2.6 ATEX / IECEx
SIRIUS 3RW50 soft starter
Manual, 09/2019, A5E35628455002A/RS-AA/001
45
2.6
ATEX / IECEx
2.6.1
Use in hazardous areas
The components of the 3RW50 soft starters are not suitable for installation in hazardous
areas.
Use the device only in a control cabinet with at least degree of protection IP 4x.
If you have any questions, ask your ATEX / IECEx expert.
2.6.2
ATEX / IECEx-certified motor overload protection
Environmental conditions
Comply with the ambient conditions for which the 3RW50 soft starter is approved.
Note
Ambient temperature during operation.
Note that the 3RW50 soft starters are approved for operation in a temperature range of
-25 °C to +60 °C.
In ambient temperatures higher than 40 °C, take the derating of the rated operational current
into consideration.
You can find further information on derating in the Technical specifications (Page 193) in the
section "Power electronics" or in Catalog IC 10
https://support.industry.siemens.com/cs/ww/en/view/109747945
Note
Temperature sensor
For ATEX / IECEx-certified motor protection, use of the PTC type A sensor only is approved.
Note
Simulation Tool for Soft Starters
Note that the Simulation Tool for Soft Starters (Page 23) already takes into account the
derating for certain ambient temperatures when selecting a suitable 3RW5 soft starter.
Parameterizing the soft starter
The parameters for ATEX / IECEx applications are to be set using the setting elements of
the 3RW50 soft starter.