SIEMENS UAC:FN344045115E2FAJRX Schaffner Line Harmonic Filter 45 kW 400V 50 Hz

The SIEMENS UAC:FN344045115E2FAJRX Schaffner Line Harmonic Filter is a critical component for industrial power quality management, designed to mitigate harmonic distortion and ensure the reliable operation of motor drives and other sensitive equipment. This 45 kW, 400V, 50 Hz filter offers superior performance in reducing electromagnetic interference (EMI) and improving power factor, directly translating to enhanced system efficiency and extended equipment lifespan. Its robust design and advanced filtering technology make it an indispensable solution for industries facing stringent power quality standards and demanding operational environments.

Product Specifications

| Parameter                     | Value                                 |

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

| Manufacturer                  | SIEMENS / Schaffner                   |

| Model Number                  | UAC:FN344045115E2FAJRX                |

| Rated Power                   | 45 kW                                 |

| Rated Voltage                 | 400 V                                 |

| Rated Frequency               | 50 Hz                                 |

| Harmonic Attenuation          | Up to 45th harmonic                   |

| Current Rating                | Specified by application (typically ~90A for 45kW) |

| Protection Class              | IP20 (typical, consult datasheet)     |

| Operating Temperature Range   | Varies by model (e.g., -25°C to +55°C) |

| Dimensions (H x W x D)        | Varies by model                       |

| Weight                        | Varies by model                       |

| Connection Type               | Screw terminals or busbars            |

Core Features & Market Positioning

The Schaffner FN344045115E2FAJRX distinguishes itself through its high attenuation capabilities, effectively suppressing line harmonics generated by variable frequency drives (VFDs) and other non-linear loads. This advanced filtering minimizes current and voltage distortion, crucial for meeting international standards such as IEEE 519. Its market positioning is firmly rooted in providing reliable, high-performance power quality solutions for demanding industrial applications where uptime and efficiency are paramount. Unlike simpler filters, this unit offers a comprehensive approach to harmonic mitigation, safeguarding sensitive downstream equipment and reducing the risk of costly operational disruptions.

Key Application Scenarios

This SIEMENS Schaffner harmonic filter is extensively deployed in a variety of industrial settings. Its primary application is in conjunction with variable frequency drives (VFDs) or adjustable speed drives (ASDs) used in motor control applications across manufacturing, automation, and process industries. Sectors such as food and beverage processing, pharmaceuticals, and automotive manufacturing benefit significantly from the improved power quality it provides, ensuring stable operation of robotic arms, conveyor systems, and process machinery. Furthermore, it is vital in applications involving pumps, fans, and compressors where harmonic distortion can lead to overheating and reduced efficiency.

Practical System Integration Guidance

Integrating the SIEMENS UAC:FN344045115E2FAJRX Schaffner Line Harmonic Filter requires careful consideration of wiring and installation practices to ensure optimal performance and safety. The filter should be installed in close proximity to the VFD or load it is protecting, typically on the line side of the drive. Ensure all connections are made according to the terminal markings on the filter and the drive, paying close attention to torque specifications for screw terminals to prevent loose connections. Proper grounding of the filter chassis to the main electrical ground is essential for effective EMI suppression. Always consult the manufacturer's installation manual for detailed wiring diagrams and specific safety precautions relevant to the 400V, 50 Hz system.

Operation and Risk Mitigation

Safe and effective operation of the SIEMENS UAC:FN344045115E2FAJRX filter hinges on adhering to operational guidelines and understanding potential risks. Before performing any maintenance or inspection, always de-energize the system and verify that all capacitors within the filter have discharged; consult the product manual for specific discharge times. Overloading the filter beyond its rated 45 kW capacity can lead to premature failure and potential fire hazards. Regular visual inspections for signs of overheating or damaged insulation are recommended. While this filter significantly mitigates harmonic-related risks, it does not eliminate the need for proper VFD parameterization and system design.

Scalability & Long-Term Value

The SIEMENS UAC:FN344045115E2FAJRX offers significant long-term value through its robust construction and compatibility with evolving industrial automation systems. While this specific unit is rated for 45 kW, Schaffner offers a range of harmonic filters, allowing for scalability in larger or multi-drive installations by paralleling units or selecting higher-capacity models. Its passive filtering technology ensures reliability and minimal maintenance, contributing to a lower total cost of ownership. Integration with modern IIoT platforms is typically achieved through monitoring the input and output power quality parameters of the system where the filter is installed, providing data for predictive maintenance and overall operational optimization.

Frequently Asked Questions

What is the primary function of the SIEMENS Schaffner harmonic filter?

This filter's core purpose is to reduce harmonic distortion in electrical power systems. It safeguards sensitive equipment from the adverse effects of non-linear loads.

It significantly improves power quality by attenuating unwanted current and voltage waveforms. This leads to more reliable system operation and reduced energy waste.

The filter minimizes electromagnetic interference (EMI) and radio frequency interference (RFI). This is crucial for compliance with industry standards like IEEE 519.

How does the 45 kW rating affect the filter's application?

The 45 kW rating indicates the maximum continuous power throughput the filter can handle. It is designed for motor drives or other loads drawing up to this power level.

Exceeding the 45 kW rating can cause the filter to overheat, leading to premature failure and potential damage to connected equipment. Always select a filter with adequate capacity for your application.

This specific rating makes it suitable for medium-sized industrial machinery, pumps, fans, and HVAC systems operating on a 400V, 50Hz network.

What are the benefits of using a Schaffner harmonic filter in a 400V, 50 Hz system?

Using this filter significantly enhances system efficiency by reducing energy losses caused by harmonics. This translates to lower electricity bills and a reduced carbon footprint.

It protects valuable equipment, such as VFDs, motors, and control systems, from premature failure due to harmonic-induced overheating and stress. This minimizes downtime and maintenance costs.

Compliance with international power quality standards, like IEEE 519, is achieved, preventing penalties and ensuring smooth integration into the grid.

Is the SIEMENS UAC:FN344045115E2FAJRX compatible with all VFDs?

The filter is designed for compatibility with most VFDs operating at 400V and 50Hz that present non-linear load characteristics. Its passive design offers broad compatibility.

Ensure the VFD's current rating is within the filter's specifications for a 45 kW load, typically around 90A, to guarantee proper operation and longevity.

Always refer to the VFD manufacturer's guidelines and the filter's datasheet to confirm specific electrical compatibility and installation requirements.

What is harmonic distortion and why is it a problem?

Harmonic distortion refers to the presence of unwanted higher-frequency signals superimposed on the fundamental 50 Hz AC waveform. These are often generated by electronic devices like VFDs.

These harmonics cause equipment to overheat, reduce efficiency, lead to nuisance tripping of circuit breakers, and can interfere with communication systems. It's a form of power pollution.

Mitigating harmonics is essential for reliable operation of the electrical grid and all connected equipment, ensuring safety and compliance with power quality regulations.

How do I install the SIEMENS Schaffner harmonic filter?

Installation requires mounting the filter close to the load or VFD it serves, typically in a control panel or enclosure. Ensure adequate ventilation around the unit.

Connect the line input to the power source and the load output to the VFD or equipment. Secure all connections firmly and ensure proper grounding of the filter's chassis.

Always disconnect power before installation and follow the specific wiring diagrams and torque recommendations provided in the product's installation manual.

What maintenance is required for this type of filter?

Regular visual inspections for dust accumulation, loose connections, or signs of overheating are recommended. Keep the filter clean and ensure cooling vents are unobstructed.

Electrically, these passive filters generally require minimal maintenance beyond initial installation checks. However, periodic checks of connection integrity are prudent.

If you suspect the filter is malfunctioning, perform diagnostic checks as per the manual, but always ensure the system is de-energized and capacitors are discharged.

Can this filter be used for loads other than VFDs?

Yes, the filter is effective for any inductive or capacitive load that generates significant harmonic distortion. This includes SMPS, rectifiers, and other non-linear loads.

It helps to smooth the current waveform drawn from the supply, improving the power factor and reducing nuisance tripping of downstream protective devices.

The key is to ensure the load's power and current requirements do not exceed the filter's 45 kW rating and overall specifications.

What happens if I overload the 45 kW filter?

Overloading the filter will cause its internal components, particularly the inductors and capacitors, to overheat significantly. This can lead to a shortened lifespan or immediate failure.

Excessive heat can damage the insulation of the windings, potentially causing short circuits and posing a fire risk within the electrical enclosure.

The filter may also cease to provide effective harmonic attenuation, negating its intended purpose and potentially damaging connected equipment.

How does this filter contribute to IIoT integration and smart grids?

While the filter itself is a passive device, its presence optimizes power quality, which is a key metric for IIoT and smart grid operations. Stable power enables reliable data transmission.

The filter's performance can be indirectly monitored by measuring input and output power quality metrics on the system it protects. This data can feed into SCADA or IIoT platforms.

By ensuring compliance with grid codes and reducing reactive power, it contributes to the overall stability and efficiency required for modern smart grid infrastructure.