3RK1207-1BQ40-0AA3 SIEMENS Filter Module

The SIEMENS Filter Module is an auxiliary component primarily designed to improve the power quality and Electromagnetic Compatibility (EMC) of industrial electrical systems, particularly those involving variable speed drives (VFDs) and power supplies. It functions as a critical element for noise suppression and compliance in harsh industrial environments.

Product Parameters

Product Advantages

1. EMC Compliance and Noise Suppression: Effectively suppresses conducted and radiated electromagnetic interference (EMI), ensuring that the system meets necessary EMC regulations (e.g., CE, UL) and prevents interference with nearby sensitive electronic and communication equipment.
2. Harmonic Reduction: Reduces harmonic distortion in the supply current, leading to lower energy consumption, reduced stress on upstream equipment (transformers, generators), and improved power quality.
3. Extended Motor and Cable Life (Output Filters): Output filters minimize voltage peaks and steep voltage gradients ($text{d}v/text{d}t$) applied to the motor windings, thereby reducing premature motor wear, preventing insulation breakdown, and allowing the use of longer motor cables.
4. System Reliability: By smoothing out power fluctuations and mitigating noise, the filter modules contribute to the overall stability and reliability of the automation and drive system.
5. Optimized Integration: Designed as modular components that seamlessly fit into the industrial cabinet or drive system architecture, simplifying installation and wiring.

Product Applications

• Variable Speed Drive (VFD) Systems: Essential for maintaining power quality and EMC compliance in applications using frequency converters (drives) for motor control.
• Power Supplies: Used to clean the input power for sensitive industrial power supply units, protecting the automation electronics (PLCs, HMIs) from line disturbances.
• Harmonics Mitigation: Applied in industrial facilities with a high density of non-linear loads (like VFDs and power rectifiers) to reduce the system’s total harmonic distortion (THD).
• Long Cable Runs: Output filters are crucial when the motor cable length exceeds the maximum specified by the drive system, protecting the motor insulation from reflected waves and overvoltages.

Important Considerations

• Correct Sizing: The filter module must be correctly rated for the voltage and current of the specific drive or power supply it is paired with. Undersizing can lead to overheating and failure, while oversizing is uneconomical.
• Earthing/Grounding: Proper earthing (grounding) is critical for the effectiveness of EMC/Line filters. The installation instructions regarding grounding points and cable shield connections must be strictly followed.
• Installation Location: Filters often generate heat and can be large. Adequate space and cooling in the electrical cabinet must be provided according to the technical specifications.
• Leakage Currents: Many high-performance filters, particularly EMC filters, generate high earth leakage currents. This must be considered when selecting residual current devices (RCDs) or designing the protective earth conductor.
• System Standards: The choice of filter (e.g., a “Class A” or “Class B” filter) must align with the specific electromagnetic compatibility standards (e.g., EN 61800-3) required for the installation environment.