SIEMENS 6SL3730-6TG35-5AA3 SINAMICS S120 Cabinet NRLM 450kW 550A Efficient Power Supply Module 500V-690V Supply

The SIEMENS 6SL3730-6TG35-5AA3 SINAMICS S120 Cabinet NRLM is a high-performance, efficient power supply module designed for demanding industrial applications. Boasting a substantial 450kW power output and 550A current rating, this unit operates reliably within a 500V to 690V supply voltage range. Its advanced design prioritizes energy efficiency, robustness, and seamless integration into sophisticated automation systems, making it a cornerstone for modern manufacturing and process control.

Product Specifications

| Parameter                | Value                               |

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

| Product Type             | SINAMICS S120 Cabinet NRLM          |

| Model Number             | 6SL3730-6TG35-5AA3                  |

| Rated Power Output       | 450 kW                              |

| Rated Current            | 550 A                               |

| Supply Voltage           | 500 V - 690 V                       |

| Protection Rating        | IP20 (typical for cabinet modules)  |

| Communication Interface  | PROFINET/PROFIBUS DP (configurable) |

| Cooling                  | Integrated fan cooling              |

| Dimensions (H x W x D)   | Varies by cabinet configuration     |

| Ambient Operating Temp.  | 0°C to +45°C (derating may apply)    |

Core Features & Market Positioning

The SIEMENS 6SL3730-6TG35-5AA3 excels in providing a stable and efficient power backbone for complex drive systems. Its core strength lies in the SINAMICS S120 platform's inherent flexibility and high power density, enabling compact and energy-conscious solutions. This unit is positioned as a premium component for applications demanding precise motor control, high dynamic response, and superior reliability, setting it apart from standard inverter solutions. Siemens' established reputation for industrial automation quality further solidifies its market standing, offering peace of mind for critical operations.

Key Application Scenarios

This robust power supply module is ideally suited for heavy-duty industrial sectors such as material handling, including cranes and conveyor systems, where precise speed and torque control are paramount. It finds extensive use in the chemical and petrochemical industries for pumps and compressors requiring consistent, high-power operation. Furthermore, it is a critical component in the metals and mining sector for driving large machinery like mills and extruders, as well as in printing and paper manufacturing for high-speed, synchronized motion control.

Practical System Integration Guidance

Integrating the SIEMENS 6SL3730-6TG35-5AA3 into a SINAMICS S120 drive system involves careful consideration of power distribution and control networking. The module connects to the main power supply via heavy-duty terminals, requiring appropriate cable sizing and protection devices. For control, it interfaces with the Control Unit (CU) via a bus system, typically PROFINET or PROFIBUS DP, utilizing appropriate cabling and connectors. Commissioning is managed through Siemens' STARTER commissioning software, allowing for parameterization of motor data, control modes, and communication settings. Ensure proper grounding and ventilation within the control cabinet to maintain optimal operating conditions and system longevity.

Operation and Risk Mitigation

Safe operation of the SINAMICS S120 Cabinet NRLM necessitates adherence to electrical safety standards and proper handling procedures. Always ensure power is isolated before performing any maintenance or wiring. The module incorporates comprehensive internal protection against overcurrent, overvoltage, and undervoltage. Critical fault codes are typically displayed on the Control Unit's operator panel or communicated via the fieldbus, with common issues relating to motor connection faults, internal component errors, or power supply anomalies. Referencing the official Siemens SINAMICS S120 documentation for specific fault code interpretations and troubleshooting steps is crucial for effective risk mitigation.

Scalability & Long-Term Value

The SINAMICS S120 platform, including the 6SL3730-6TG35-5AA3, offers significant scalability. Additional drive modules or power units can be integrated into the same DC bus configuration, allowing for expansion as operational needs grow. Its compatibility with Siemens' broader industrial automation ecosystem, including PLCs like SIMATIC S7, facilitates seamless integration into advanced manufacturing environments and Industry 4.0 initiatives. This backward and forward compatibility ensures long-term value by protecting investment and enabling integration with emerging digital solutions.

Frequently Asked Questions

What is the primary function of the SIEMENS 6SL3730-6TG35-5AA3?

This module serves as a high-power, efficient power supply for SINAMICS S120 drive systems. It conditions incoming line voltage to provide a stable DC bus voltage for multiple motor inverters. Its robust design ensures reliable operation in demanding industrial settings.

The module's main purpose is to form the DC link for a drive system, supplying energy to the connected motor inverters. It efficiently converts incoming AC power to a regulated DC voltage, crucial for precise motor control. This unit is engineered for continuous high-load operation.

Its role is critical in complex machinery, providing the foundational electrical power required for sophisticated motion control applications. It acts as the central energy hub within the drive cabinet.

What are the typical voltage and current ratings for this power supply module?

The SIEMENS 6SL3730-6TG35-5AA3 operates with a supply voltage range of 500V to 690V AC. It is rated to deliver a continuous current of 550A. This allows it to support substantial motor loads.

The input voltage flexibility is a key advantage, accommodating various grid conditions within its specified range. The high current rating of 550A signifies its capability to power high-performance drives.

These specifications make it suitable for large industrial motors that require significant power. It ensures ample current is available for peak demand situations.

How does this module integrate into a SINAMICS S120 system?

It connects to the main AC power supply and is linked to the SINAMICS S120 Control Unit via a communication bus like PROFINET. It forms the DC bus that feeds individual motor modules. Proper wiring and configuration are essential.

The module's DC bus output feeds directly into the infeed terminals of other SINAMICS S120 drive components. This creates a unified power and control network for the entire drive system. STARTER software is used for setup.

Integration involves careful cable management, ensuring correct phase connections for the input power and secure bus connections to the Control Unit. It is a core component of the S120 cabinet lineup.