EN 3475-807:2025

Overview

EN 3475-807:2025 is a European standard published by CEN, specifying test methods for measuring the transfer impedance of electrical cables designed for use in aircraft applications. As part of the broader EN 3475 series addressing aerospace electrical cables, this standard focuses specifically on evaluating a cable’s ability to resist electromagnetic interference and maintain signal integrity. It is intended to be used in conjunction with EN 3475-100 (general test methods) and IEC 62153-4-3 (triaxial test methods for surface transfer impedance).

Transfer impedance is a critical parameter for screening effectiveness in shielded cables, directly impacting electromagnetic compatibility (EMC) in demanding aerospace environments. This standard provides essential guidance for aerospace manufacturers, testing laboratories, and quality assurance teams working with aircraft electrical systems.

Key Topics

• Scope and Purpose
  • Defines the method for measuring cable transfer impedance in aerospace applications.
  • Aims to ensure consistent assessment of EMC characteristics in aircraft electrical cables.
• Test Methods
  • Identifies use of the triaxial method detailed in IEC 62153-4-3 as the primary test approach.
  • Specifies requirements for specimen preparation and reporting of test results.
• Normative References
  • Requires coordination with other standards, specifically EN 3475-100 and IEC 62153-4-3.
• Requirements
  • Ensures transfer impedance values meet the product-specific limits set in relevant aerospace cable standards.

Applications

EN 3475-807:2025 is widely applicable in settings where aircraft electrical cable performance can affect safety, compliance, and overall system reliability:

• Aircraft Manufacturing
  • Used during design verification and qualification testing of shielded cables to ensure electromagnetic compatibility within aircraft systems.
• Quality Assurance and Compliance
  • Supports compliance with international aerospace requirements for cable screening, essential for airworthiness certification.
• Testing Laboratories
  • Provides a standardized method for cable manufacturers and testing facilities to assess product specifications and address customer requirements.
• Maintenance and Upgrades
  • Assists maintenance organizations in evaluating aftermarket cables or verifying continued EMC performance during upgrades.

By standardizing the measurement of transfer impedance, EN 3475-807:2025 helps minimize the risk of electromagnetic interference, contributing to the reliable and safe operation of avionic and electrical equipment in aircraft.

Related Standards

• EN 3475-100 - Aerospace series - Cables, electrical, aircraft use - Test methods - Part 100: General
  • Outlines general test methods and requirements for aerospace electrical cables, providing a foundational reference for all subsequent EN 3475 parts.
• IEC 62153-4-3 - Metallic communication cable test methods - Electromagnetic compatibility (EMC) - Surface transfer impedance - Triaxial method
  • Specifies the triaxial testing technique adopted for transfer impedance measurement in EN 3475-807:2025, ensuring alignment with international EMC assessment practices.
• EN 3475 Series - Various parts covering a range of test methods for aerospace electrical cables, supporting comprehensive cable evaluation in the industry.

For organizations working within the aerospace sector, adherence to EN 3475-807:2025 ensures the implementation of best practices in cable selection, testing, and certification, directly addressing EMC challenges and enhancing aircraft safety and performance.