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Minimum stress of ADSS optical cable

The minimum or long-term operational stress of ADSS optical cables, often called the equivalent daily stress (EDS), is generally 16–25% of the cable's rated tensile strength (RTS).Explanation

The minimum stress in ADSS cables refers to the tension the cable experiences under normal, windless, ice-free conditions at average annual temperatures. This is considered the average long-term operational stress, ensuring stable performance without additional strain or attenuation of the optical fibers .

  • Equivalent Daily Stress (EDS): Typically 16–25% of RTS, depending on cable design and environmental conditions .
  • Fiber Strain: Under this stress, the optical fibers experience negligible strain, meaning there is no additional attenuation, and the cable operates very stably over its lifetime .
  • Fatigue and Aging: EDS is also used as a fatigue aging parameter, guiding the design of vibration-proof and long-term durable ADSS cables .
Related Parameters
  • Rated Tensile Strength (RTS): The maximum tensile load the cable can withstand without permanent damage.
  • Maximum Allowable Tension (MAT): The tension under full design load conditions, usually around 40% of RTS, ensuring fiber strain remains within safe limits .
  • Ultimate Operating Tension (UES): Short-term overload capacity, typically >60% of RTS, allowing temporary stress without permanent fiber damage . Understanding the minimum stress (EDS) is crucial for sag-tension calculations, long-term reliability, and proper installation of ADSS cables in aerial networks. It ensures that the cable maintains its structural integrity and optical performance under normal operating conditions .
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