Table Of Contents - Siemens SIRIUS 3RW30 Manual

Table of contents

1 Introduction ............................................................................................................................................. 11
1.1 Important notes.......................................................................................................................... 11
2 Safety information .................................................................................................................................. 13
2.1 Before commencing work: Isolating the equipment from the supply system and ensuring that it
cannot be reconnected. ............................................................................................................. 13
2.2 Five safety rules for work in or on electrical systems ................................................................ 13
3 Product description ................................................................................................................................ 15
3.1 Fields of application................................................................................................................... 15
3.2 Basic physical principles of a three-phase induction motor....................................................... 15
3.2.1 Three-phase induction motor ..................................................................................................... 15
3.3 Functional principle of the SIRIUS 3RW30 and 3RW40 soft starters........................................ 17
3.3.1 Method of operation of a two-phase controlled soft starter ....................................................... 20
3.3.2 Starting current asymmetry ....................................................................................................... 21
3.3.3 Applications and use ................................................................................................................. 22
3.4 Comparison of device functions ................................................................................................ 24
4 Product combinations ............................................................................................................................ 25
4.1 SIRIUS modular system ............................................................................................................ 25
5 Functions ................................................................................................................................................. 27
5.1 Start modes ............................................................................................................................... 27
5.1.1 Voltage ramp ............................................................................................................................. 27
5.1.2 Current limiting and ramp-up detection (3RW40 only) .............................................................. 29
5.2 Stop modes ............................................................................................................................... 30
5.2.1 Stop without load (3RW30 and 3RW40) .................................................................................... 31
5.2.2 Soft stop (3RW40 only) ............................................................................................................. 31
5.3 Motor protection / intrinsic device protection (3RW40 only) ...................................................... 32
5.3.1 Motor protection function ........................................................................................................... 32
5.3.2 Intrinsic device protection (3RW40 only) ................................................................................... 35
5.4 Functions of the RESET buttons ............................................................................................... 36
5.4.1 SIRIUS 3RW40 2, 3RW40 3, and 3RW40 4 soft starters .......................................................... 36
5.4.2 SIRIUS 3RW40 5 and 3RW40 7 soft starters ............................................................................ 38
5.4.3 Other functions of the RESET button ........................................................................................ 39
5.5 Functions of the inputs .............................................................................................................. 40
5.5.1 Start input (terminal 1) on 3RW30 and 3RW40 2 to 3RW40 4 .................................................. 40
5.5.2 Start input (terminal 3) on 3RW40 5 and 3RW40 7 ................................................................... 40
5.5.3 Thermistor input / connection on 3RW40 2 to 3RW40 4 ........................................................... 41
5.6 Functions of the outputs ............................................................................................................ 41
5.6.1 3RW30: Output terminal 13 / 14 ON .......................................................................................... 41
5.6.2 3RW40: Output terminals 13 / 14 ON / RUN and 23 / 24 BYPASSED ...................................... 42
SIRIUS 3RW30 / 3RW40
Manual 01/2010, 535 1995-02 DS01
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