3RW44 soft starters
4
Manual, 03/2017, NEB535219502000/RS-AB/008
Table of contents
1
Important notes .......................................................................................................................................... 9
1.1
Security information ............................................................................................................... 11
2
Introduction .............................................................................................................................................. 12
2.1
Basic physical principles of the three-phase asynchronous motor and operating
principle of the soft starter ...................................................................................................... 12
2.1.1
Three-phase asynchronous motor ......................................................................................... 12
2.1.2
Principle of operation of the 3RW44 electronic soft starter ................................................... 14
2.2
Application and use ................................................................................................................ 17
2.3
Marginal conditions for storage and operation ....................................................................... 19
3
Configuration instructions ........................................................................................................................ 20
3.1
Configuration .......................................................................................................................... 20
3.1.1
RS 232 serial PC interface and Soft Starter ES parameterizing and operating software ...... 20
3.1.2
Simulation Tool for Soft Starters (STS) ................................................................................. 20
3.2
Startup class .......................................................................................................................... 21
3.2.1
Application examples for normal starting (CLASS 10)........................................................... 22
3.2.2
Application examples for heavy starting (CLASS 20) ............................................................ 23
3.2.3
Application examples for very heavy starting (CLASS 30) .................................................... 24
3.3
ON time and switching frequency .......................................................................................... 25
3.4
Installation altitude and ambient temperature ........................................................................ 26
3.5
Factory settings ...................................................................................................................... 27
3.6
Article number system for SIRIUS 3RW44 soft starters ........................................................ 28
4
Installation, connection and feeder configuration ..................................................................................... 29
4.1
Installing the soft starter ......................................................................................................... 29
4.1.1
Unpacking .............................................................................................................................. 29
4.1.2
Mounting position ................................................................................................................... 29
4.1.3
Installation requirements ........................................................................................................ 30
4.1.4
Mounting dimensions and clearances ................................................................................... 31
4.2
Design of the feeder ............................................................................................................... 32
4.2.1
General information ............................................................................................................... 32
4.2.2
Soft starters in standard circuits ............................................................................................. 33
4.2.3
Soft starters in inside-delta circuits ........................................................................................ 35
4.2.4
Soft starter with contactor disconnector (main contactor) ..................................................... 38
4.3
Protection of the soft starter against short-circuits (type of assignment 2) ............................ 40
4.4
Capacitors for improving the power factor ............................................................................. 41
4.5
Generator operation with three-phase asynchronous motor ................................................. 42
4.6
Electrical connection .............................................................................................................. 42
4.6.1
Control and auxiliary circuit connection ................................................................................. 42