Siemens SIRIUS 3RW55 Equipment Manual page 208

Functions
8.14 ATEX / IECEx
• 3RW55 soft starter from firmware version V2.0 and product version E02 or 3RW55 Failsafe
soft starter
• Micro SD card (Page 243)
• 3RW5 HMI High Feature
Menu "Parameters > Soft Starter > Ex operation"
If you are operating the motor in Class I and Class II Hazardous Locations:
• If an Ex motor is protected, only parameter set 1 is active even if another parameter set is
selected. Parameter sets 2 and 3 are not available in this case.
Temperatures on the motor
• Make sure that the limit temperature of the winding insulation is not exceeded.
• Make sure that the maximum temperature of the motor is below the locally critical minimum
ignition temperature.
• Make sure that the explosion protection is ensured for operation of motors in the hazardous
area.
Operating principle
The "Ex application" function supports you with parameterization of the 3RW55 or 3RW55
Failsafe soft starter if you are operating a motor in Class I and Class II Hazardous Locations. You
can choose which of the following motor protection functions is used to protect the motor:
• Complete motor protection
• Electronic motor overload protection
• Thermistor motor protection with temperature sensor
You must confirm each setting of Ex relevant parameters on the 3RW5 HMI High Feature. This
prevents settings relevant to explosion protection from being corrupted during transmission.
This also ensures that the parameter changes were set on the correct 3RW55 or 3RW55 Failsafe
soft starter and the requirements of common standards and regulations are met.
The 3RW55 and 3RW55 Failsafe soft starters continue to work with the parameters that were last
active until you confirm the newly set parameters.
Note
Appearance of the text file and the Ex relevant parameters on the 3RW5 HMI High Feature
Note that the text file for logging the new Ex parameters in the 3RW5 HMI High Feature is only
shown in English.
For simpler comparison of the parameter settings logged in the text file with the Ex relevant
parameters to be enabled, the Ex-relevant parameters are shown in English.
As soon as the Ex relevant parameters are enabled, these parameters will appear in the set
language of the 3RW5 HMI High Feature again.
208
SIRIUS 3RW55 and 3RW55 Failsafe Soft Starters
Equipment Manual, 02/2022, A5E35630887002A/RS-AF/006