Siemens SIRIUS 3RW55 Manual page 12

Description
1.2 Operating principle
Functions
● Parameterizable soft starting for a smooth drive startup
● Parameterizable soft stopping for a smooth drive stop
● Parameterizable current limiting for avoiding current peaks
● Integrated electronic motor overload protection with adjustable trip class
(OFF, CLASS 10A, 10E, 20E, 30E)
● Universal intrinsic device protection protects the 3RW55 soft starter against overload
● Extended full motor protection by means of thermistor motor protection for connection of
a temperature sensor
● Analog output for displaying a set measured value using an external display device
● Automatic parameterization simplifies the system commissioning
● Current limit monitoring with 4 separate limit values
● Monitoring of switching frequency in order to comply with application-dependent wait /
cooling times
● Condition Monitoring for plant monitoring
● Parameterizable digital inputs and outputs
● Basic unit with trace functionality (evaluation via Soft Starter ES)
● Connection options of motor in inline circuit or in inside-delta circuit
● The emergency start function allows the system to continue being operated in the event
of a system fault
● Phase asymmetry monitoring protects the motor from asymmetrical current consumption
● Motor heating for minimizing condensation inside the motor for drives outdoors
● Pump cleaning function for removing blockages and dirt from water pipes, filters, and
pump blades
● Breakaway pulse for overcoming high stiction, e.g. in mills
● Access protection by PIN and user accounts
● Micro SD card for saving data
● Optional communication module
● Creep speed function in applications with a low counter-torque, e.g. positioning of
machine tools
● 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 to the input of further soft
starters
● Serial switch-on can switch on and off as many as 3 different motors one after the other
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SIRIUS 3RW55 soft starter
Manual, 08/2018, A5E35630887002A/RS-AB/002