SIEMENS 6SL3725-1TG41-0AA3 SINAMICS S120 Liquid Cooled Single Motor Module 1000kW 1025A High Performance 690V Unit

The SIEMENS 6SL3725-1TG41-0AA3 SINAMICS S120 is a high-performance, liquid-cooled single motor module engineered for demanding industrial applications. This unit boasts a formidable 1000kW power output, a continuous current rating of 1025A, and operates at 690V, making it ideal for heavy-duty machinery and complex drive systems. Its liquid cooling design ensures superior thermal management, enabling sustained peak performance and enhanced reliability under extreme operating conditions. The SINAMICS S120 platform is recognized for its advanced control capabilities, energy efficiency, and seamless integration into sophisticated automation architectures.

Product Specifications

| Parameter               | Value                                    |

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

| Product Number          | 6SL3725-1TG41-0AA3                       |

| Series                  | SINAMICS S120                            |

| Type                    | Single Motor Module, Liquid Cooled       |

| Rated Power             | 1000 kW                                  |

| Rated Continuous Current| 1025 A                                   |

| Rated Voltage           | 690 V                                    |

| Cooling                 | Liquid Cooled                            |

| Protection Class        | IP20                                     |

| Dimensions (H x W x D)  | 550 mm x 410 mm x 300 mm (approximate)   |

| Weight                  | 60 kg (approximate)                      |

Core Features & Market Positioning

The SIEMENS 6SL3725-1TG41-0AA3 SINAMICS S120 stands out in the high-power drive market due to its robust liquid-cooling system, which offers significantly better heat dissipation compared to air-cooled alternatives. This advanced thermal management allows for higher power density and more consistent performance, especially in applications with continuous high loads or confined installation spaces. Its integration into the broader SINAMICS S120 family means access to a comprehensive ecosystem of control units, I/O modules, and accessories, facilitating tailored solutions. Siemens positions the SINAMICS S120 series as a premium, high-performance drive platform for complex motion control tasks, emphasizing precision, efficiency, and reliability in critical industrial processes.

Key Application Scenarios

This 1000kW SINAMICS S120 motor module is exceptionally suited for heavy industrial drives where maximum power and precise control are paramount. Key applications include large industrial pumps and fans in sectors like water treatment and power generation, compressors in the petrochemical industry, and heavy-duty rolling mills and extruders in metal processing. Its high current rating (1025A) and 690V operation make it ideal for powering large-scale machinery requiring substantial torque and consistent speed regulation, such as those found in mining operations and large material handling systems. The liquid cooling feature is particularly advantageous in environments where ambient temperatures are high or where space constraints limit airflow for air-cooled units.

Practical System Integration Guidance

Integrating the SIEMENS 6SL3725-1TG41-0AA3 SINAMICS S120 liquid-cooled module requires careful planning, particularly regarding the cooling circuit. A dedicated liquid cooling loop, typically utilizing a water-glycol mixture, must be established. This involves connecting the module's integrated coolant connections to a suitable heat exchanger or chiller system, ensuring adequate flow rate and temperature control as per Siemens' recommendations. For system control, the module interfaces with a SINAMICS S120 Control Unit via a c-link or similar bus system. Parameterization is typically performed using Siemens' STARTER or TIA Portal engineering software, where drive functions, safety settings, and communication protocols are configured. Electrical connections should adhere to the high-voltage and high-current safety regulations, with appropriate cable sizing and protection devices installed.

Operation and Risk Mitigation

Safe operation of the SIEMENS 6SL3725-1TG41-0AA3 SINAMICS S120 is governed by strict adherence to operating manuals and safety directives. Prior to commissioning, ensure all cooling circuit parameters are stable and within specified limits to prevent thermal overload. Users must be trained in high-voltage equipment handling. Common fault codes relate to thermal protection (e.g., F30000 series for temperature monitoring), communication errors, or motor feedback issues. Regular inspection of the liquid cooling system for leaks, pump operation, and coolant quality is crucial. Implementing appropriate safety interlocks and emergency stop functions integrated with the drive's safety features is vital for risk mitigation.

Scalability & Long-Term Value

The SINAMICS S120 platform, including the 6SL3725-1TG41-0AA3, offers significant scalability and long-term value through its modular design. Additional motor modules can be paralleled or interconnected to create multi-axis systems, allowing for expansion as application demands grow. Its compatibility with Siemens' TIA Portal facilitates seamless integration into larger automation projects, including those leveraging Industrial Internet of Things (IIoT) capabilities for predictive maintenance and remote diagnostics. The inherent robustness and advanced features of the S120 series ensure a long service life and maintain high performance levels, protecting the investment in demanding industrial environments.

Frequently Asked Questions (FAQs)

What is the primary advantage of liquid cooling in the SIEMENS 6SL3725-1TG41-0AA3?

Liquid cooling offers superior heat dissipation compared to air cooling. This allows for higher power density and sustained peak performance.

It enables operation in challenging environments with high ambient temperatures. The system ensures greater reliability under continuous heavy loads.

Reduced fan noise and a more compact footprint can also be advantages. Liquid cooling contributes to a longer operational lifespan for the module.

How do I connect the SIEMENS 6SL3725-1TG41-0AA3 to a cooling system?

Connect the module's coolant ports to a dedicated liquid circulation loop. Ensure proper sealing to prevent leaks and maintain system integrity.

The loop must include a pump, heat exchanger or chiller, and possibly a reservoir. Follow Siemens' specified flow rates and coolant types.

Regularly monitor coolant temperature, level, and quality. Maintain the cooling circuit according to operational and safety guidelines.

What type of motor can be driven by the 6SL3725-1TG41-0AA3?

This module is designed for high-performance AC induction and synchronous motors. It supports a wide range of motor types with appropriate feedback.

Ensure the motor's rated power, voltage, and current are within the module's capabilities. Consult motor datasheets for compatibility.

Encoder or resolver feedback is essential for precise motion control. Select feedback devices compatible with the SINAMICS S120 Control Unit.

Can I use the 6SL3725-1TG41-0AA3 in a multi-axis system?

Yes, the SINAMICS S120 platform is designed for multi-axis configurations. Multiple S120 motor modules can be linked together.

These modules share a common DC bus and are controlled by a single Control Unit. This allows for coordinated motion across several axes.

Integration requires careful planning of the DC bus coupling and communication links between modules. Use appropriate connection kits.

What are the typical fault codes for thermal issues on this unit?

Thermal faults are often indicated by codes in the F30000 range. These monitor internal module temperatures and motor temperatures.

Specific codes like F30001 might indicate overheating of the power unit. F30002 could relate to motor overheating if a thermal probe is connected.

Always refer to the SINAMICS S120 fault code list for precise interpretation. Address the root cause of overheating, such as inadequate cooling or overload.

What software is used for configuring the 6SL3725-1TG41-0AA3?

Siemens STARTER is a common engineering software for SINAMICS drives. It allows for commissioning, parameterization, and diagnostics.

TIA Portal offers a more integrated environment for automation projects. It combines PLC, HMI, and drive configuration.

Both software packages provide comprehensive tools for setting up motor parameters, control modes, and communication.

What is the protection class of this module?

The SIEMENS 6SL3725-1TG41-0AA3 has an IP20 protection class. This means it is protected against solid objects greater than 12.5 mm.

It offers no protection against water ingress. Therefore, it must be installed in a control cabinet or a protected environment.

Ensure the installation location prevents dust accumulation and moisture exposure to maintain operational integrity.

What is the voltage rating and its implications?

The module operates at 690V. This high voltage rating is suitable for very large industrial motors and high-power applications.

Higher voltage systems can reduce current requirements for the same power. This can lead to smaller cable sizes and lower resistive losses.

Operation at 690V requires specific safety precautions and compliance with high-voltage electrical standards. Ensure qualified personnel handle installation and maintenance.

How is the power module controlled?

The 6SL3725-1TG41-0AA3 is a power module, not a standalone controller. It requires a SINAMICS S120 Control Unit for operation.

The Control Unit handles the complex motion control algorithms and communicates with the power module. This allows for precise speed, torque, and position control.

Communication between the Control Unit and the power module typically occurs via a digital interface like c-link.

What are the main industries that use this product?

This high-power module serves heavy industries requiring robust drive solutions. Key sectors include chemical, petrochemical, and oil and gas.

It is also prevalent in manufacturing for large machinery like extruders and presses. Water treatment plants and power generation facilities utilize it for large pumps and fans.

Mining and heavy material handling operations are also significant users of this equipment.