Key facts
- Brand
- Siemens
- Model
- 3RW40
- Industry
- Industrial
- Documents
- 4
- Languages
- ZH · EN
- Last added
- 2026-10-14
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Siemens SIRIUS 3RW30/3RW40 Soft Starter Manual
This document is the official user manual for the Siemens SIRIUS 3RW30 and 3RW40 soft starters. It provides comprehensive instructions for qualified personnel regarding safety, product description, functional principles, and application planning. The guide details the installation and mounting procedures, including electrical connections and mechanical assembly requirements.
Read onlineSiemens 3RW40 specifications
| Document Date | 01/2010 |
|---|---|
| Document Order Number | 535 1995-02 DS01 |
| Copyright Year | 2009 |
All Siemens 3RW40 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
What are the tightening torque specifications for model 3RW40 5 and 3RW40 7?
The specified tightening torque is M6 ... 10 Nm for 3RW40 5 and M8 ... 15 Nm for 3RW40 7.
Who is qualified to operate the SIRIUS soft starters?
The product may be operated only by personnel qualified for the specific task in accordance with relevant documentation.
Can Siemens products be used with components from other manufacturers?
Yes, provided that components from other manufacturers are recommended or approved by Siemens.
What is the main advantage of using a soft starter over direct starting?
Soft starters reduce power loss and provide better protection for mechanical transmission devices compared to direct starting.
From: Siemens SIRIUS Soft Starters 3RW30 and 3RW40 Product Overview
How does the 3RW40 differ from the 3RW30 regarding stopping?
The 3RW40 provides soft stopping (0...20 seconds) and adjustable current limiting, whereas the 3RW30 focuses on starting.
From: Siemens SIRIUS Soft Starters 3RW30 and 3RW40 Product Overview
What is the rated control supply voltage range for the 3RW40 soft starter?
The 3RW40 can be powered from 24 V up to 230 V.