SIEMENS 6SL3725-1TG38-0AA3 SINAMICS S120 Liquid Cooled Motor Module 800kW 810A High Pulse Frequency 1.25kHz 690V

The SIEMENS 6SL3725-1TG38-0AA3 SINAMICS S120 Liquid Cooled Motor Module stands as a pinnacle of performance and efficiency in industrial motor control. This 800kW, 810A unit, operating at a high pulse frequency of 1.25kHz and a voltage of 690V, delivers exceptional power density and precise motion control. Its liquid-cooled design is a key advantage, enabling sustained high performance and a compact footprint, crucial for demanding applications where thermal management is paramount. The SINAMICS S120 platform's inherent flexibility and advanced features make this module a superior choice for complex automation tasks, offering robust reliability and optimized energy consumption.

Product Specifications

| Feature                 | Specification                               |

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

| Product Number          | 6SL3725-1TG38-0AA3                          |

| Series                  | SINAMICS S120                               |

| Type                    | Liquid Cooled Motor Module                  |

| Power                   | 800 kW                                      |

| Continuous Current (I_c) | 810 A                                       |

| Pulse Frequency         | 1.25 kHz                                    |

| Voltage                 | 690 V                                       |

| Cooling Method          | Liquid Cooling                              |

| Protection Class        | IP20                                        |

| Communication Interface | DRIVE-CLiQ                                  |

Core Features & Market Positioning

The SIEMENS 6SL3725-1TG38-0AA3 SINAMICS S120 module differentiates itself through its advanced liquid-cooling technology, which significantly enhances thermal dissipation, allowing for higher power output in a smaller frame size compared to air-cooled equivalents. This robust thermal management is critical for applications demanding continuous high-power operation without performance degradation, positioning it as a premium solution for heavy-duty industrial automation. The integration with the broader SINAMICS S120 family ensures seamless compatibility with a wide range of Siemens automation components, offering a cohesive and powerful drive system. Its high pulse frequency capability of 1.25kHz contributes to superior motor dynamics, enabling smoother operation and enhanced precision in dynamic motion control scenarios.

Key Application Scenarios

This high-performance motor module is ideally suited for demanding industrial applications requiring substantial power and precise control. It excels in heavy machinery, such as large rolling mills, extruders, and complex material handling systems, where sustained high torque and dynamic response are essential. Furthermore, its liquid-cooled design makes it a strong candidate for applications with limited ventilation or in environments where space is at a premium, like advanced manufacturing facilities and large-scale process automation. The module's capability to handle high pulse frequencies also makes it suitable for applications requiring extremely fast and accurate motor movements, such as in high-speed robotics or precision positioning systems.

Practical System Integration Guidance

Integrating the SIEMENS 6SL3725-1TG38-0AA3 SINAMICS S120 module into an existing system requires careful attention to its liquid-cooling setup and DRIVE-CLiQ communication. The module must be connected to a suitable liquid cooling loop, ensuring proper flow rates and coolant temperature are maintained for optimal performance and longevity. For communication, it utilizes the DRIVE-CLiQ interface, which allows for high-speed, reliable data exchange with the SINAMICS S120 control unit. Proper parameterization via Siemens' engineering software, such as SIMOTION or STARTER, is crucial for defining motor data, control modes, and safety functions to match the specific application requirements.

Operation and Risk Mitigation

Operating the SIEMENS 6SL3725-1TG38-0AA3 SINAMICS S120 module requires adherence to safety protocols, especially concerning its high voltage and liquid cooling system. Ensure all safety interlocks are functional and that personnel are trained in high-voltage equipment operation. Regular monitoring of coolant temperature and flow is essential to prevent overheating, which can lead to module derating or failure. Common fault codes, such as those related to overcurrent, overvoltage, or cooling system issues, should be readily understood by operators. Promptly addressing these faults according to the SINAMICS S120 troubleshooting guide will mitigate operational downtime and prevent potential equipment damage.

Scalability & Long-Term Value

The SIEMENS 6SL3725-1TG38-0AA3 SINAMICS S120 module offers significant scalability and long-term value due to its integration within the Siemens Digital Industries portfolio. Its modular design allows for expansion and adaptation to evolving automation needs, and compatibility with various SINAMICS S120 components ensures a flexible system architecture. Furthermore, its ability to connect to Industrial IoT (IIoT) platforms through standard communication protocols facilitates data acquisition for predictive maintenance and process optimization, enhancing operational efficiency and return on investment over the product's lifecycle.

Frequently Asked Questions (FAQs)

What are the primary benefits of liquid cooling for this motor module?

Liquid cooling offers superior heat dissipation compared to air cooling. This allows for higher power density in a compact design. It ensures sustained peak performance under heavy loads.

How does the high pulse frequency of 1.25kHz benefit motor performance?

A high pulse frequency leads to better motor dynamics and control. It enables smoother operation and reduced torque ripple. This results in enhanced precision for dynamic applications.

What are the essential components for integrating the 6SL3725-1TG38-0AA3 module into a SINAMICS S120 system?

A compatible SINAMICS S120 control unit is essential for system operation. You will need a suitable liquid cooling unit and associated piping. Appropriate power cables and DRIVE-CLiQ cables are also required.

What voltage and current ratings are crucial for this module's operation?

The module operates at a nominal voltage of 690V. Its continuous current rating is 810A. These parameters are critical for power supply and motor selection.

Can this module be used with different types of industrial motors?

Yes, the SINAMICS S120 platform supports a wide range of AC motors. It is crucial to correctly parameterize the motor data in the drive. This ensures optimal performance and protection.

What are common causes of faults or errors with SINAMICS S120 liquid-cooled modules?

Overheating due to inadequate coolant flow is a common issue. Incorrect motor parameterization can also lead to faults. Power supply disturbances can trigger overvoltage or undervoltage errors.

How is system commissioning typically performed for this module?

Commissioning involves mechanical mounting and electrical connections. Liquid cooling loop setup and initial fill are critical steps. Drive parameterization using Siemens software is then performed.

What safety considerations are paramount when working with this high-power module?

Always de-energize the system before maintenance. Ensure proper grounding and insulation of all components. Follow lockout/tagout procedures rigorously.

How does the DRIVE-CLiQ interface enhance system integration?

DRIVE-CLiQ provides high-speed, digital communication between components. It simplifies wiring compared to analog systems. This interface ensures reliable data transfer for control and diagnostics.

What are the long-term maintenance requirements for this liquid-cooled motor module?

Regular checks of the liquid cooling system are vital. Monitor coolant levels and quality periodically. Software updates for the control unit should also be considered.