Siemens 3RW5117-1XC14 SIRIUS 3RW51 Automation Soft Starter 38A 18.5kW

The Siemens 3RW5117-1XC14 SIRIUS 3RW51 Automation Soft Starter is engineered for smooth, controlled motor acceleration and deceleration, offering significant advantages in reducing mechanical stress and electrical load. This soft starter boasts a rated operational current of 38A and supports motor power up to 18.5kW at 400V, making it a robust solution for various industrial applications. Its integrated bypass functionality ensures efficient operation and minimal energy loss during continuous running, while advanced features like torque control and integrated overload protection enhance motor longevity and system reliability.

| Parameter                    | Specification                                  |

| :--------------------------- | :--------------------------------------------- |

| Product Type                 | Soft Starter                                   |

| Series                       | SIRIUS 3RW51                                   |

| Rated Operational Current    | 38 A                                           |

| Max Motor Power (400V)       | 18.5 kW                                        |

| Control Voltage              | 110-250 V AC/DC                                |

| Protection Class             | IP20                                           |

| Communication Interface      | Optional (e.g., PROFINET, PROFIBUS)            |

| Bypass Functionality         | Integrated                                     |

| Overload Protection          | Electronic                                     |

| Mounting Type                | Rail or screw mounting                         |

Core Features & Market Positioning

The Siemens 3RW5117-1XC14 differentiates itself through its advanced semiconductor-based switching technology, providing a smoother start than traditional methods and significantly reducing peak current draw. This inherent design minimizes mechanical shock on machinery, prolonging equipment life and reducing maintenance requirements. Its integrated bypass contactor not only saves space and wiring effort but also optimizes energy efficiency by eliminating continuous power dissipation through the semiconductors once full speed is achieved. Compared to direct-on-line (DOL) starters, the 3RW51 series offers superior control over starting torque, crucial for applications sensitive to mechanical stress. Its position in the market is solidified by Siemens' reputation for reliability, safety, and integration within the broader SIRIUS ecosystem, making it a preferred choice for demanding industrial automation tasks.

Key Application Scenarios

This Siemens 3RW5117-1XC14 soft starter is ideally suited for applications where controlled motor starting is paramount. Common use cases include pumps, fans, compressors, conveyors, and mixers across industries such as water treatment, food and beverage, material handling, and general manufacturing. For instance, in pump applications, it prevents water hammer, protecting piping systems from pressure surges. In fan systems, it enables gradual ramp-up, reducing noise and energy consumption. Conveyor systems benefit from smooth acceleration, preventing load slippage and damage to transported goods. The 38A rating and 18.5kW capability make it suitable for medium-sized industrial motors requiring precise motor control and protection.

Practical System Integration Guidance

Integrating the Siemens 3RW5117-1XC14 into existing control systems is streamlined due to its modular design and comprehensive connectivity options. The unit requires a 110-250V AC/DC control voltage supply. Power connections involve connecting the incoming three-phase power to the line terminals and the motor to the load terminals. The integrated bypass ensures that when the motor reaches its rated speed, the bypass contactor closes, allowing the motor to run directly off the line with minimal losses. For advanced control and diagnostics, optional communication modules can be integrated, enabling seamless data exchange with PLCs via protocols like PROFINET or PROFIBUS. Wiring should adhere to standard industrial practices, ensuring proper grounding and insulation for safety and reliable operation.

Operation and Risk Mitigation

Operating the Siemens 3RW5117-1XC14 involves configuring its start and stop ramp times, as well as overload protection settings, typically via its onboard interface or through a connected HMI or PLC. The electronic overload protection is adjustable and provides precise motor monitoring, tripping the starter in case of excessive current draw. Risk mitigation is inherent in its design, with features like soft start preventing sudden mechanical shocks and integrated overload protection guarding against motor burnout. In case of faults, the starter provides diagnostic information through status LEDs or via communication interfaces, aiding in quick troubleshooting. Common fault codes relate to overload conditions, phase imbalance, or internal device faults, which can be resolved by addressing the underlying issue, such as motor load or wiring problems.

Scalability & Long-Term Value

The Siemens 3RW5117-1XC14 offers significant long-term value through its integration capabilities and Siemens' commitment to backward and forward compatibility within the SIRIUS modular system. It can be easily incorporated into larger automation architectures, including those leveraging Siemens' Industrial Edge or MindSphere platforms for IIoT connectivity and data analytics. This allows for predictive maintenance, remote monitoring, and process optimization. The soft starter's robust construction and electronic protection features contribute to extended motor and equipment lifespan, reducing total cost of ownership. Furthermore, its ability to communicate with higher-level control systems facilitates future upgrades and the implementation of smart manufacturing initiatives without requiring a complete overhaul of motor control components.

Frequently Asked Questions

1. What is the primary function of the Siemens 3RW5117-1XC14?

The Siemens 3RW5117-1XC14 is an automation soft starter. It controls the acceleration and deceleration of electric motors. It prevents sudden mechanical shocks during startup.

2. What are the main benefits of using this soft starter?

It significantly reduces inrush current. This protects the motor and power supply. Mechanical stress on connected equipment is minimized.

3. How does the integrated bypass feature work?

The bypass activates once the motor reaches full speed. This bypasses the semiconductor elements. It reduces energy loss and heat generation.

4. What is the maximum motor power supported by this unit?

This soft starter supports motors up to 18.5 kW. This rating applies at a voltage of 400V. It is suitable for many industrial motor applications.

5. What is the rated operational current of the 3RW5117-1XC14?

The rated operational current is 38 Amperes. This indicates the maximum continuous current it can handle. Ensure motor current does not exceed this value.

6. Can this soft starter be integrated with a PLC?

Yes, it can be integrated with PLCs. Optional communication modules are available. These support protocols like PROFINET and PROFIBUS.

7. What type of overload protection does it offer?

It features electronic overload protection. This provides precise motor monitoring. It is adjustable to suit motor requirements.

8. Is installation of the Siemens 3RW5117-1XC14 complex?

Installation is designed to be straightforward. It supports rail or screw mounting. Standard wiring practices should be followed.

9. What is the protection class of this device?

The protection class is IP20. This means it is protected against solid objects over 12.5mm. It is not protected against water ingress.

10. How does this soft starter improve operational efficiency?

It optimizes motor start-up profiles. Reduced inrush current saves energy. The integrated bypass enhances efficiency during run time.