SIEMENS UAC:FN344030115E2FAJRX Schaffner Line Harmonic Filter 30 kW 400V 50 Hz

The SIEMENS UAC:FN344030115E2FAJRX, a Schaffner line harmonic filter, is a critical component for modern industrial power systems, rated at 30 kW and operating at 400V and 50 Hz. This advanced filter is engineered to significantly reduce harmonic distortion in electrical networks, ensuring compliance with stringent power quality standards and protecting sensitive equipment from detrimental effects. Its primary advantages lie in its superior harmonic mitigation capabilities, robust construction for demanding industrial environments, and seamless integration into existing Siemens control architectures. The core of its performance is its ability to attenuate harmonics generated by variable speed drives (VSDs) and other non-linear loads, thereby preventing overheating, premature component failure, and operational inefficiencies. Key technical parameters include its rated power of 30 kW, operational voltage of 400V, and frequency of 50 Hz, making it suitable for a wide range of heavy-duty applications.

Product Specifications

| Parameter              | Value                               |

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

| Product Number         | UAC:FN344030115E2FAJRX              |

| Manufacturer           | Schaffner (Siemens)                 |

| Type                   | Line Harmonic Filter                |

| Rated Power            | 30 kW                               |

| Rated Voltage          | 400 V                               |

| Rated Frequency        | 50 Hz                               |

| Application            | Harmonic Mitigation                 |

| System Compatibility   | Designed for VSDs and non-linear loads |

Core Features & Market Positioning

The SIEMENS UAC:FN344030115E2FAJRX Schaffner line harmonic filter distinguishes itself through its exceptionally high attenuation of characteristic harmonics, particularly those emanating from Pulse Width Modulation (PWM) inverters used in variable speed drives. Its sophisticated design employs advanced inductive and capacitive elements, precisely tuned to create a low-impedance path for harmonic currents, effectively diverting them away from the main power supply. This results in a significantly cleaner sinusoidal waveform, which is crucial for extending the lifespan of motors, transformers, and other connected electrical equipment. Positioned as a premium solution for industrial power quality management, it offers a compelling alternative to active filters or over-specced transformers, providing a cost-effective and reliable method for achieving compliance with standards like IEEE 519. The Schaffner brand, under Siemens, signifies a commitment to robust engineering and industrial-grade performance, making this filter a preferred choice for applications where uptime and equipment longevity are paramount.

Key Application Scenarios

This 30 kW, 400V, 50 Hz Schaffner line harmonic filter is ideally suited for a variety of industrial settings where non-linear loads are prevalent. It is a vital component in manufacturing plants utilizing multiple variable speed drives for conveyor systems, pumps, and fans, where harmonic distortion can lead to significant energy loss and equipment malfunction. In the process industry, such as chemical or food and beverage production, where precise motor control is essential, this filter ensures stable operation and prevents interference with sensitive control systems. Furthermore, it is commonly deployed in renewable energy installations, like wind or solar farms, to mitigate harmonics generated by inverters connected to the grid. Its application extends to large commercial buildings with extensive HVAC systems, data centers requiring stable power for critical IT infrastructure, and any environment where compliance with international power quality standards is a non-negotiable requirement.

Practical System Integration Guidance

Integrating the SIEMENS UAC:FN344030115E2FAJRX into an existing power system is a straightforward process, designed for minimal disruption. The filter is typically installed in series with the variable speed drive, either directly at the drive's input terminals or at the main distribution board feeding multiple VSDs. Ensure the installation location provides adequate ventilation to dissipate heat generated during operation. Wiring connections should be made in strict accordance with the provided schematic and local electrical codes, paying close attention to the correct termination of phase (L1, L2, L3) and ground connections. For optimal performance, it is crucial to ensure that the cables connecting the filter to the VSD are as short as possible to minimize any residual inductance. Grounding must be robust and directly connected to the system's ground point. While the filter itself does not require programming, its inclusion will affect the VSD's internal parameter settings related to input impedance; consult the VSD manufacturer's documentation for any necessary adjustments to ensure compatibility and optimal harmonic reduction.

Operation and Risk Mitigation

The SIEMENS UAC:FN344030115E2FAJRX operates passively, requiring no external power source and minimal maintenance. Its robust design ensures a long operational life under typical industrial conditions. However, like any electrical component, adherence to safety protocols is paramount. Always ensure that the power supply to the circuit where the filter is installed is completely de-energized and locked out before performing any inspection or maintenance. Avoid operating the filter outside its specified voltage, frequency, or current ratings, as this can lead to premature failure or damage to connected equipment. Overheating is a primary concern, so ensure the filter is installed in a well-ventilated area and that cooling vents are not obstructed. While specific fault codes are not typically generated by passive filters, anomalies in system performance, such as increased motor temperature or audible noise from the filter itself, may indicate an issue. In such cases, a qualified electrician should inspect the system for harmonic resonance, loose connections, or potential overload conditions.

Scalability & Long-Term Value

The SIEMENS UAC:FN344030115E2FAJRX offers significant long-term value through its role in enhancing system reliability and reducing operational costs. By effectively mitigating harmonics, it extends the service life of connected electrical assets, thereby reducing costly repairs and premature replacements. Its compatibility with a wide range of Siemens variable speed drives and other industrial automation components ensures seamless integration into existing or future upgraded systems. While this specific filter model is rated for 30 kW, scalability in terms of power quality management can be achieved by installing multiple units in parallel for larger loads or by selecting higher-rated Schaffner filters from the Siemens portfolio. The increasing demand for energy efficiency and grid compliance means that investing in effective harmonic mitigation is not just about meeting regulations but also about future-proofing industrial operations and potentially enabling access to grid incentives for superior power quality.

Frequently Asked Questions

What is the primary function of the SIEMENS UAC:FN344030115E2FAJRX?

This Schaffner harmonic filter is designed to significantly reduce harmonic distortion in AC power systems. It protects sensitive equipment from the damaging effects of non-linear loads like VSDs. The filter ensures cleaner power, improving system efficiency and reliability.

How does this filter improve power quality?

It attenuates harmonic currents generated by variable frequency drives and other non-linear loads. By creating a low-impedance path for these harmonics, it prevents them from entering the main power grid. This results in a more sinusoidal voltage and current waveform.

Can this filter be used with any VSD?

It is designed to work with most standard VSDs operating at 400V and 50Hz. Always verify compatibility with your specific VSD model. Check the VSD's manual for any recommended input impedance settings.

What are the benefits of using this harmonic filter?

Using this filter enhances equipment longevity by reducing overheating and stress. It ensures compliance with power quality standards like IEEE 519. This leads to improved system efficiency and reduced energy waste.

What is the rated power and voltage for this model?

The SIEMENS UAC:FN344030115E2FAJRX has a rated power of 30 kW. Its operational voltage is 400V. It is designed for a standard frequency of 50 Hz.

Where is the best place to install this harmonic filter?

Install the filter in series with the VSD, as close as possible to the drive's input terminals. Ensure adequate ventilation in the installation location. Proper grounding is essential for safety and performance.

What maintenance is required for this filter?

As a passive filter, it requires minimal maintenance. Regular visual inspections for any signs of damage or overheating are recommended. Ensure ventilation paths remain clear.

What happens if the filter is not installed correctly?

Incorrect installation can lead to reduced harmonic mitigation effectiveness. It may also cause overheating or damage to the filter or connected equipment. Proper wiring and grounding are critical.

Can I connect multiple VSDs to one filter?

Yes, if the combined load of the VSDs does not exceed the filter's 30 kW rating. For larger systems, consider a higher-rated filter or multiple filters. Consult the product datasheet for specific guidelines.

What safety precautions should I take when working with this filter?

Always de-energize and lock out the power supply before installation or maintenance. Follow all local electrical codes and safety standards. Wear appropriate personal protective equipment (PPE).