EN 6059-308:2014

Overview

EN 6059-308:2014 is a European Standard under the Aerospace series that defines a test method for rapid change of temperature on electrical cable protection sleeves and conduits used in aerospace installations. Developed by CEN and ASD-STAN, this standard aims to assess the behavior and durability of conductive protection sleeves when exposed to sudden temperature fluctuations. It must be applied in conjunction with EN 6059-100, which covers general test methods for protection sleeves.

This standard is essential for manufacturers, engineers, and quality assurance professionals involved in aerospace electrical cable installation, ensuring the reliability and safety of protection sleeves under extreme environmental conditions.

Key Topics

• Scope and Purpose
  EN 6059-308:2014 specifies a detailed method to evaluate how conductive protection sleeves or conduits behave after exposure to rapid temperature changes. This ensures their performance is consistent and safe for aerospace electrical systems.

• Specimen Preparation
  The standard requires specimens of at least 600 mm length, prepared with a maximum diameter cable bundle according to aerospace specifications. Twisting and tying procedures emulate real installation conditions to guarantee valid test results.

• Testing Apparatus
  The test utilizes two temperature-controlled chambers-one for low temperature, one for high-with rapid transfer times (under 1 minute) to simulate real-world thermal shocks. Precise temperature control within ±3% is mandatory to reproduce exact testing conditions.

• Test Cycles
  Specimens undergo 10 cycles of rapid temperature change according to a defined temperature-time profile, ensuring comprehensive evaluation of the sleeves’ thermal resistance and mechanical integrity during and after thermal shocks.

• Assessment Criteria
  Pass/fail requirements are defined according to each product’s specific standard but generally include maintaining electrical conductivity and physical integrity without degradation after testing.

Applications

EN 6059-308:2014 is critical in the aerospace industry for:

• Electrical cable protection design: Validating materials and constructions for sleeves and conduits that protect electrical wiring in aircraft.
• Quality assurance: Ensuring protection sleeves withstand rapid temperature variations that may occur in aerospace environments, such as altitude changes, engine operation, or weather exposure.
• Compliance and certification: Fulfilling regulatory requirements related to aircraft electrical system installation and maintenance.
• Product development: Guiding manufacturers in testing new protection sleeve materials and designs against harsh temperature cycling to optimize safety and performance.

Related Standards

• EN 6059-100: Aerospace series - Electrical cables, installation - Protection sleeves - General test methods. EN 6059-308 is designed to be used alongside this foundational standard.
• EN 3475-301: Aerospace electrical cables - Test method for ohmic resistance per unit length, referenced for resistance measurement during specimen testing.
• Other parts of the EN 6059 series that cover additional test methods and specifications for aerospace cable protection systems.

Keywords: EN 6059-308, aerospace protection sleeves, electrical cable installation, rapid temperature change test, electrical conduit testing, aerospace cable protection standards, thermal cycling test, conductive protection sleeves, cable sleeve durability, aerospace electrical safety standards.