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 5