Siemens SIRIUS 3RW30 User Manual (English)

Other manuals for Siemens SIRIUS 3RW30

Operating Instructions22 pages

Assembly Instructions8 pages

Questions and Answers:

R
Rhonda EstesAug 2, 2025
What to do if there is missing load voltage or phase failure in my Siemens SIRIUS 3RW30?
- T
  Taylor MunozAug 3, 2025
  If you're experiencing a missing load voltage or phase failure with your Siemens Controller, it could be due to several reasons. First, check if phase L1, L2, or L3 is missing or collapsing during motor operation. This can be caused by voltage dips. To resolve this, connect L1, L2, and L3 properly or correct the voltage dip. Another cause might be a motor that's too small, leading to a fault when switching to bypass mode. If the motor is using less than 10% of the soft starter's rated current, it can't be operated with the soft starter; consider using a different soft starter. Lastly, ensure that the motor phase T1, T2, and T3 are correctly connected, checking for issues like jumpers in the motor terminal box or a closed repair switch.
C
Cassandra HartAug 8, 2025
Why is my Siemens Controller showing a bypass overload?
- D
  dmaxwellAug 8, 2025
  If your Siemens Controller is experiencing a bypass overload, it means a current greater than 3.5 times the soft starter's current (Ie) is occurring for more than 60 milliseconds in bypass mode. This can happen if the motor is blocked. To solve this, check the motor and load, and also verify the soft starter's dimensions.
I
ireyesAug 14, 2025
How to fix impermissible electronics supply voltage on a Siemens SIRIUS 3RW30 Controller?
- R
  Ryan AdamsAug 14, 2025
  If your Siemens Controller is showing an impermissible electronics supply voltage, it's likely because the control supply voltage doesn't match the soft starter's rated voltage. Check the control supply voltage, as a power failure or voltage dip could be the cause.
M
Michael CarrAug 20, 2025
What to do if Siemens SIRIUS 3RW30 has a missing load voltage or phase failure?
- M
  Maurice LeeAug 20, 2025
  If your Siemens Controller experiences a missing load voltage or phase failure, several issues could be the cause. First, check if phase L1, L2, or L3 is missing at the start of soft starting or fails during motor operation; if so, connect L1, L2, or L3, or correct any voltage dips. Second, ensure that the connected motor has sufficient power; if not, connect a motor with a higher rated operational current or select a different soft starter. Finally, verify that motor phase T1, T2, or T3 is properly connected, ensuring jumpers in the motor terminal box are correctly configured and any repair switches are closed.
L
Lance MasonAug 27, 2025
What to do if my Siemens SIRIUS 3RW30 shows impermissible electronics supply voltage?
- C
  Cindy OrrAug 27, 2025
  If your Siemens Controller displays an impermissible electronics supply voltage, it means the control supply voltage does not match the soft starter's rated voltage. You should check the control supply voltage, as the incorrect voltage could stem from a power failure or a voltage dip.

Siemens SIRIUS 3RW30 Specifications

General

Type	Soft starter
Operating frequency	50 ... 60 Hz
Operating frequency rated value	50 ... 60 Hz
Adjustable rated motor current minimum	7.5 A
Adjustable rated motor current maximum	12.5 A
Maximum control supply voltage at AC	230 V
Type of voltage of the control supply voltage	AC
Control supply voltage frequency	50 ... 60 Hz
Ambient temperature range	-25 ... +60 °C
Standards	IEC 60947-4-2

Summary

Introduction

1.1 Important notes

Provides fundamental information and practical tips for using SIRIUS soft starters.

1.2 Additional documentation

Lists further manuals and operating instructions available for download.

1.3 Siemens Industry Online Support

Provides up-to-date information, support, and services for Siemens products.

1.4 Technical Assistance

Details contact information for technical support via phone, email, and internet.

1.5 Siemens Industry Online Support app

Information on accessing device-specific data via a mobile application.

Safety information

2.1 ESD Guidelines

Provides guidelines for handling electrostatic sensitive devices to prevent damage.

2.2 Reactive power compensation

Details precautions for connecting capacitors for power factor correction.

2.3 Electromagnetic compatibility (EMC) according to IEC 60947-4-1

Specifies EMC requirements and potential interference in domestic environments.

2.4 Security information

Discusses industrial security functions and customer responsibilities for cyber threat protection.

2.6 Before commencing work: Isolating the equipment from the supply system and ensuring that it cannot be reconnected.

Details critical safety steps for electrical work, including isolation procedures.

2.7 Five safety rules for work in or on electrical systems

Outlines the five essential safety rules for electrical work, emphasizing order of application.

Product description

3.1 Fields of application

Describes the use of soft starters for reducing torque and starting current in motors.

3.2 Functional principle of the SIRIUS 3RW30 and 3RW40 soft starters

Explains how thyristors and phase angle control manage motor voltage and current.

3.3 Comparison of device functions

Compares the functionalities of SIRIUS 3RW30, 3RW40, and 3RW44 soft starters.

Functions

5.1 Start modes

Details different startup functions to adapt the motor start to specific applications.

5.1.1 Voltage ramp

Explains how voltage ramp achieves soft starting by increasing voltage over time.

5.1.2 Current limiting and ramp-up detection (3RW40 only)

Explains current limiting and ramp-up detection features specific to the 3RW40.

5.2 Stop modes

Details different stop modes to adapt motor stopping to specific applications.

5.3 Motor protection / intrinsic device protection (3RW40 only)

Details motor protection and intrinsic device protection features available for 3RW40.

5.4 Functions of the RESET buttons

Explains the functionality of the RESET buttons for fault handling and mode selection.

5.5 Functions of the inputs

Details how the soft starter inputs are used for control signals.

5.6 Functions of the outputs

Describes the functions of the output terminals for status indication.

Messages and diagnosis

6.1 3RW30: LEDs

Provides a table showing LED indicators and their meanings for the 3RW30.

6.2 3RW30: Troubleshooting

Lists common faults, their causes, and remedies for the 3RW30.

6.5 3RW40: Troubleshooting

Lists common faults, causes, and remedies for the 3RW40.

Application planning

7.1 Application examples

Provides examples of soft starter applications in industrial settings.

7.1.1 Roller conveyor application

Details the application of 3RW30 soft starters for roller conveyor systems.

7.1.2 Hydraulic pump application

Describes the use of 3RW40 soft starters for hydraulic pump applications.

Installation

8.1 Installing the soft starter

Provides instructions for the physical installation of the soft starter.

8.1.2 Permissible mounting position

Illustrates and describes the allowed vertical and horizontal mounting positions.

8.1.3 Mounting dimensions, clearances, and assembly type

Specifies minimum clearances, dimensions, and assembly types for cooling.

8.1.5 Installation requirements

Details installation requirements, including degree of protection and ambient conditions.

Installation / mounting

9.1 General information

Describes the components of a motor feeder and protection requirements.

9.2 General feeder assembly (type of coordination 1)

Shows a block diagram for a general feeder assembly with type of coordination 1.

9.4 Soft starter assembly with type of coordination 2

Explains type of coordination 2 using semiconductor fuses for short-circuit protection.

9.5 Capacitors to improve the power factor

Warns against connecting capacitors to output terminals and provides connection guidelines.

Connecting

10.1 Electrical connection

Details the electrical connection methods for control and main circuits.

10.1.1 Control and auxiliary terminals

Describes the two available connection technologies for control terminals.

10.1.2 Main circuit connection

Explains the main circuit connection design for specific soft starter sizes.

Operation

11.1 Operator controls, displays, and connections on the 3RW30

Identifies and explains the operator controls, displays, and terminals on the 3RW30.

11.2 Operator controls, displays, and connections on the 3RW40

Identifies and explains the operator controls, displays, and terminals on the 3RW40.

11.3 Effects on changing the potentiometer settings

Summarizes how changes to potentiometer settings affect startup, bypass, and run-down behavior.

Configuration

12.1 Configuration in general

Provides general guidelines for configuring soft starters for normal and heavy-duty starting.

12.1.1 Configuration procedure

Outlines the steps for configuring the soft starter based on application requirements.

12.1.2 Selecting the optimum soft starter

Presents a selection aid table for choosing the right soft starter for various applications.

12.2 Startup class

Explains startup classes and their impact on soft starter selection and thermal load.

12.5 Dimensioning of soft starters for motors with high starting current conditions

Provides guidance on selecting soft starters for motors with high starting current.

12.6 Installation altitude and ambient temperature

Explains how altitude and temperature affect soft starter performance and ratings.

12.7 Calculating the permissible switching frequency

Explains how mounting position and assembly type affect switching frequency.

12.9 Article number system for the 3RW30

Details the structure of article numbers for the SIRIUS 3RW30 soft starter.

12.10 Article number system for the 3RW40

Details the structure of article numbers for the SIRIUS 3RW40 soft starter.

Commissioning

13.1 Commissioning the 3RW30

Provides steps for commissioning the SIRIUS 3RW30 soft starter.

13.1.2 Quick commissioning of the 3RW30 and optimization of the parameters

Offers a quick commissioning guide and parameter optimization steps for the 3RW30.

13.2 Commissioning the 3RW40

Provides steps for commissioning the SIRIUS 3RW40 soft starter.

13.2.2 Quick commissioning of the 3RW40 and optimization of the parameters

Offers a quick commissioning guide and parameter optimization steps for the 3RW40.

13.4 Setting the motor protection function

Explains how to set up the motor overload protection function.

13.7 Functions of the outputs

Describes the functions of the output terminals for status indication.

Technical data

14.1 Technical data in Siemens Industry Online Support

Provides instructions on how to find technical data via Siemens Industry Online Support.

14.2 3RW30

Provides an overview of the SIRIUS 3RW30 soft starter's features and applications.

14.3 3RW40

Overview of SIRIUS 3RW40 soft starter features, advantages, and design.

14.3.12 3RW40 2., 3., 4. main conductor cross-sections

Specifies main conductor cross-sections for 3RW40 2, 3, 4 models.

14.3.15 Electromagnetic compatibility according to EN 60947-4-2

Details EMC data for 3RW40 according to EN 60947-4-2.

14.3.17 Types of coordination

Explains types of coordination (1 and 2) for 3RW40 based on application requirements.

14.3.22 Motor protection tripping characteristics for 3RW40 (with symmetry)

Motor protection tripping characteristics (with symmetry) for 3RW40.

Typical circuit diagrams

16.1 Typical circuit for the optional thermistor motor protection evaluation

Shows the typical circuit for optional thermistor motor protection evaluation.

16.2 Control by pushbutton

Illustrates control circuits using pushbuttons for 3RW30 and 3RW40.

16.3 Control by switch

Illustrates control circuits using switches for 3RW30 and 3RW40.

16.4 Control in automatic mode

Illustrates control circuits for automatic mode operation of 3RW30 and 3RW40.

16.5 Control by PLC

Illustrates control circuits for PLC integration with 3RW30 and 3RW40.

16.6 Control with an optional main / line contactor

Illustrates control circuits with an optional main or line contactor for 3RW30 and 3RW40.

16.7 Reversing circuit

Illustrates reversing circuits for 3RW30 and 3RW40 motors.

16.9 EMERGENCY STOP

Illustrates EMERGENCY STOP circuits using safety relays.

16.11 Dahlander / multispeed motor

Illustrates circuits for Dahlander and multispeed motors.

Appendix

A.1 Configuration data

Contains contact information for Siemens AG Technical Support and motor data fields.

A.2 Table of parameters used

A table for documenting parameter settings for 3RW40/3RW30 soft starters.

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