Siemens SIRIUS 3RW55 Equipment Manual page 27

• ATEX/IECEx certification (for 3RW55 soft starters from firmware version V2.0 and product
version E02, for 3RW55 Failsafe soft starters from firmware version V1.0 and product
version E01)
• "Ex application" function supported in parameterization of the 3RW55 and 3RW55 Failsafe
soft starters for operation of the motor in Class I and Class II Hazardous Locations (for 3RW55
soft starters from firmware version V2.0 and product version E02, for 3RW55 Failsafe soft
starters from firmware version V1.0 and product version E01)
• Current limit monitoring with 4 separate limit values
• Monitoring of switching frequency in order to comply with application-dependent waiting/
cooling times
• Condition monitoring for system monitoring
• Parameterizable digital inputs and outputs
• 3RW55 and 3RW55 Failsafe soft starters with trace functionality (evaluation via SIRIUS Soft
Starter ES (TIA Portal))
• Connection options of the motor in standard (inline) circuit or in inside-delta circuit
• The emergency start function allows the plant to continue to run in the event of a fault in
the plant
• Phase asymmetry monitoring protects the motor from asymmetrical current consumption
• Pump cleaning function for removing blockages and dirt from water pipes, filters, and
pump blades
• Pump stopping mode for reduced mechanical loads and optimum control of pump stopping
• Breakaway pulse for overcoming high stiction, e.g. in mills
• Access protection by PIN and user accounts
• Micro SD card for saving data
• Optional 3RW5 communication module for integration into bus systems
• PROFIenergy: Energy-saving functions due to stand-by mode and energy saving while
idle (for 3RW55 soft starters from firmware version V2.1 and 3RW55 Failsafe soft starters
from firmware version V1.0 combined with a 3RW5 PROFINET communication module
(accessory))
• Application wizard supports the commissioning of various applications
• Parameter set change for applications with different load conditions
• Cascade connection for connecting the output of a 3RW55 or 3RW55 Failsafe soft starter to
the input of further soft starters
• Serial starting can switch on and off as many as 3 different motors one after the other
• Web server (for 3RW55 soft starters from firmware version V2.1.1 and 3RW55 Failsafe soft
starters with firmware version higher than V1.0.0 combined with a 3RW5 PROFINET High
Feature communication module from firmware version V2.0 (accessory))
• OPC UA server (for 3RW55 soft starters from firmware version V2.1.1 and 3RW55 Failsafe
soft starters with firmware version higher than V1.0.0 combined with a 3RW5 PROFINET High
Feature communication module from firmware version V2.0 (accessory))
SIRIUS 3RW55 and 3RW55 Failsafe Soft Starters
Equipment Manual, 02/2022, A5E35630887002A/RS-AF/006
Description
3.3 Operating principle
27