Siemens SIRIUS 3RW52 Manual page 10

Description
1.3 Operating principle
Functions
● Soft starting with parameterizable starting voltage and starting ramp time
● Soft stopping with parameterizable ramp-down time
● Parameterizable current limiting function
● Soft torque for smooth ramp-up and ramp-down (avoiding torque peaks by means of
torque limitation)
● Integrated motor overload protection with adjustable trip class (Off, Class 10A, 10E, 20E)
● The intrinsic device protection protects the 3RW52 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 inline circuit or inside-delta 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 output of a measured value (alternative to thermistor motor
protection)
● Optional 3RW5 communication module for integration into bus systems
● Firmware updates upgrade the firmware of the respective device.
Further details can be found in Chapter Functions (Page 93).
10
SIRIUS 3RW52 Soft Starter
Manual, 01/2019, A5E35630451002A/RS-AD/004