GYFTS53 FRP Strength Member Double CST Armor Underground Buried Fiber Optic Cable

GYFTS53 Outdoor Stranded Loose Tube FRP Strength Member Double Steel Tape Armored Underground Direct Buried Fiber Optic Cable

Description:

GYFTS53 Stranded Loose Tube Double Corrugated Steel Tape Armored Cable is a specialized outdoor underground direct-buried fiber optic cable designed to withstand harsh underground environments, ensuring stable and long-term optical signal transmission. It integrates multiple structural layers to balance mechanical protection, environmental resistance, and signal integrity, making it widely used in backbone, access, and industrial communication networks.

Model Definition:

• GY : indicates outdoor fiber optic cable

• F :  non-metallic central strength member (FRP)

• T : loose tube filled with thixotropic gel

• S : steel tape armor (first steel tape layer for basic mechanical protection)

• 53 : Code for "second steel tape armored + polyethylene (PE) outer sheath" (the 53 structure is a classic choice for direct burial)
  

Structural Composition of GYFTS53 Double Armored Direct Burial Fiber Optic Cable:

GYFTS53 Direct Buried Cable

GYFTS53 Cable Structure

Characteristics of GYFTS53 Direct Burial Fiber Cable:

(1) Excellent Mechanical Protection

• Double Steel Tape Armor: The dual steel tape layers provide superior resistance to lateral pressure (withstands up to 10-15 kN/m² of soil pressure) and impact (e.g., accidental hits from shovels or construction equipment). It also effectively deters rodent bites (a common threat to underground cables).

• FRP Strength Member: FRP offers high tensile strength (comparable to steel) while being lightweight and corrosion-resistant. It avoids the "rust expansion" issue of steel strength members, which can damage the cable over time in moist soil.

(2) Superior Environmental Resistance

• Water Blocking: The combination of loose-tube gel, water-blocking yarn, and MDPE/HDPE sheaths achieves full water blocking (both radial and longitudinal). This prevents moisture from entering the cable and damaging the optical fibers (moisture causes signal attenuation and fiber degradation).

• Corrosion Resistance: FRP (no rust) and corrugated steel tapes (resist soil corrosion) ensure the cable operates stably in acidic, alkaline, or saline soils (e.g., coastal areas or industrial zones).

• Temperature Adaptability: The loose-tube structure allows fibers to expand/contract freely, enabling the cable to work in a wide temperature range (typically -40°C to +70°C), suitable for cold northern regions and hot southern climates.

(3) Stable Signal Transmission

• Low Attenuation: The loose-tube design minimizes stress on the optical fibers (no tension or bending during temperature changes), ensuring low signal attenuation (e.g., ≤0.36 dB/km at 1310 nm for single-mode fibers).

• High Bandwidth: Supports both single-mode (for long-distance transmission, up to 100 km+) and multi-mode (for short-distance, high-bandwidth applications, e.g., 10 Gbps at 550 m) fibers, meeting the needs of backbone, metro, and access networks.

(4) Easy Installation & Long Service Life

• Flexibility: The stranded loose-tube structure makes the cable flexible, facilitating pulling and laying in narrow trenches or around obstacles.

• Longevity: Corrosion-resistant materials (FRP, galvanized steel, MDPE) and robust protection layers extend the cable's service life to 25-30 years (far exceeding unarmored or single-armored cables).

Applications:

(1) Telecommunication Backbone & Access Networks

• Deployed in underground trenches between telecom exchanges, base stations, or data centers to form the "backbone" of communication networks.

• Used in "last-mile" access networks (e.g., FTTx, Fiber-to-the-Home) to connect central offices to residential/commercial buildings, where direct burial avoids aerial cable obstacles (e.g., trees, power lines).

(2) Power System Communication (Smart Grid)

• Laid alongside underground power cables (e.g., 110kV/220kV distribution lines) to transmit monitoring data (e.g., current, voltage) and control signals for smart grid operations. Its armor resists electromagnetic interference (EMI) from high-voltage power lines.

(3) Industrial & Mining Networks

• Used in underground mines, industrial parks, or chemical plants, where the cable must withstand harsh environments (corrosive soil, heavy machinery impact, or high humidity). For example, it connects sensors and control systems in mining operations.

(4) Municipal & Infrastructure Projects

• Integrated into municipal construction (e.g., road expansion, subway construction) or urban renewal projects, where direct burial ensures the cable is hidden and protected from surface damage.

• Used in campus networks (universities, industrial parks) to connect buildings without aerial cables, maintaining a neat landscape.

(5) Rural & Remote Area Communication

• Deployed in rural broadband projects, where direct burial is more cost-effective than aerial cables (avoiding pole installation) and better resists extreme weather (e.g., strong winds, ice) common in remote areas.