Key facts
- Brand
- Siemens
- Model
- 3RW30
- Industry
- Industrial
- Documents
- 3
- Languages
- ZH · EN
- Last added
- 2022-09-30
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Siemens 3RW30/31 Electronic Soft Starter User Manual
The Siemens 3RW30/31 electronic soft starter user manual describes the device’s safety requirements, regulatory approvals and physical description. It explains the operating principle, compares the 3RW3 series with other starters, and details the configuration options for the S00, S0, S2 and S3 variants.
Key sections cover application guidelines, assembly and connection procedures, wiring diagrams, dimension drawings, and a full set of technical parameters. The document also includes commissioning steps, diagnostic information, fault codes and recommended protective coordination with circuit breakers and fuses. This manual is written in Chinese.
Siemens 3RW30 specifications
| Starting Voltage Range (3RW30) | 40...100 % |
|---|---|
| Maximum Starting Time (3RW30) | 20 seconds |
| Overload Protection Class (3RW40) | Class 10, 15, 20 |
| Maximum Starting Frequency (3RW30) | 20 times per hour |
| Maximum Starting Current Limit (3RW40) | 300% of motor current Ie |
Source: Siemens SIRIUS Soft Starters 3RW30 and 3RW40 Product Overview
All Siemens 3RW30 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 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.
What is the standby current of the 3RW40 control supply?
The standby current is less than 150 mA.
What safety precautions must be taken before commissioning the soft starter?
Apply power first to set the bypass relay to a known state, then activate the main circuit; otherwise the motor may start unintentionally and cause injury or damage.
What configuration options are available for the 3RW30/31 soft starter?
The 3RW30 model is offered in four specifications (S00, S0, S2, S3) with different power and current ranges, while the 3RW31 model is available only in the S0 specification.