Description
1.3 Operating principle
SIRIUS 3RW50 soft starter
12 Manual, 09/2019, A5E35628455002A/RS-AA/001
Functions
● Soft starting with parameterizable starting voltage and ramp up time for a smooth starting
of the drive
● Soft stopping with parameterizable stopping time for a smooth run-down of the drive
● Parameterizable current limit for avoiding current peaks
● Soft torque for smooth ramp up and ramp-down
(avoiding torque peaks by means of torque limitation)
● Integrated electronic motor overload protection with adjustable tripping class
(Off, CLASS 10A, 10E, 20E)
● Intrinsic device protection protects the 3RW50 soft starter against overload
● Ramp-up detection
● Extended operating and diagnostic functions provided by the optional
3RW5 HMI Standard or 3RW5 HMI High Feature
● Connection to motor in standard circuit
● Adjustable RESET MODE (Manual RESET, Remote RESET, Auto RESET) for the
functions of motor protection
● Extended full motor protection via optional thermistor motor protection for connection of a
temperature switch (e.g. Thermoclick) or a thermistor (e.g. PTC type A)
(alternative to analog output)
● Optional analog output for displaying a measured value with the aid of an external display
device (alternative to the thermistor motor protection)
● Optional 3RW5 communication module for integration into bus systems
● Firmware updates upgrade the firmware of the respective device
● ATEX / IECEx certification
Further information
You can find an overview of all of the functions of the 3RW5 soft starter in the Catalog IC 10
(https://support.industry.siemens.com/cs/ww/en/view/109747945
).
Further details of the functions can be found in Chapter Functions (Page 119).
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