How to Choose PBT Tube Optical Fiber Cable solution?
Is PBT Loose Tube or FIMT a Better Choice for OPGWs?
OPGW, which stands for "Optical Ground Wire," is employed in overhead power lines for both grounding and communication purposes. Conversely, OPPC refers to "Optical Phase Conductor"—a cable that serves the dual role of conveying phase and communication signals within the system. Both OPGW and OPPC are primarily utilized in the energy sector, providing telecommunication pathways for internal and external communications.
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Besides telecommunications, optical fibers have the capability to notify control centers about temperature variations through Distributed Temperature Sensing (DTS). This feature provides operators with accurate real-time data on the line's behavior and conditions. Access to real-time temperature information is essential in OPPC lines, as it enables operators to optimize power distribution along branches while maintaining safe temperature limits, effectively fostering a "smart" grid.
PBT Loose Tube and FIMT represent two distinct fiber optic configurations that can be integrated into ground wires and phase conductors. This article aims to examine the structures and characteristics of each type of cable in order to determine which solution is more effective in practical applications.
What is PBT Loose Tube?
Polybutylene Terephthalate (PBT) is recognized as a premium material for advanced engineering applications due to its impressive stain resistance, machining properties, and superior short-term mechanical qualities, including high strength, toughness, and stiffness. PBT also showcases excellent creep resistance, dimensional stability, and low moisture absorption. These properties are relatively stable even in high-temperature and humid conditions, making it an excellent choice for high-voltage applications, such as power lines.
The PBT Loose Tube is specifically designed for outdoor usage, serving in aerial, duct, and direct-buried applications. Within the tube, a gel surrounds the optical fibers, which are protected by multiple layers. The loose arrangement of fibers inside the protective jacket renders them less susceptible to external forces.
What is FIMT?
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In contrast, FIMT substitutes the traditional PBT protection layer with a metal covering that safeguards the optical fibers. There are numerous configurations for FIMT; however, the fundamental structure consists of a steel strip, gel, and optical fibers. An optional outer aluminum layer can be included to offer enhanced protection against environmental factors and to help prevent issues like galvanic corrosion.
How to Choose the Right Type of Fiber Optic Cable?
Optical fibers are commonly employed for long-distance transmissions in integrated wiring; however, many consumers lack a thorough understanding of how to choose them. In this section, we will guide you on selecting high-quality optical fiber products by considering aspects such as fiber structure, materials, and craftsmanship.
Tip 1: Choose Fiber Optic Cables Based on Material
The materials chosen for optical cables and the production processes are critical to their lifespan. A stable manufacturing process significantly impacts the overall quality, which affects the optical fiber's loss throughout production. A commonly used benchmark for production quality is optical loss of 0.01 dB/km. Key materials include the fiber core, fiber optic gel, sheath material, and PBT (Polybutylene Terephthalate), each with different quality demands. The fiber core must accommodate a large power capacity, possess a higher signal-to-noise ratio, and have a lower bit error rate for better performance.
Tip 2: Select Fiber Optic Cables According to Core Count
Fiber optic cables can be categorized based on the number of cores, including central beam tube type, layer twisted type, skeleton type, and ribbon type. Different structures serve various purposes, and user needs may dictate specific requirements based on line conditions. Central beam tube designs tend to be straightforward and cost-effective for core counts up to 12. For extensive core counts, such as 144, steel wire reinforcement with SZ continuous synthetic cables provides superior waterproofing and resilience.
Tip 3: Choose Fiber Optic Cables Based on Purpose
Optical cables must align with their intended use. They can be classified as overhead, direct buried, pipeline, submarine, or metal-free cables. Aerial optical cables require high strength and low temperature fluctuation limits; direct-buried cables must be moisture, pressure, and chemical-resistant. Pipeline and submarine cables must withstand significant water pressure and other environmental stresses. Metal optical cables can be safely installed alongside high-voltage lines, provided they maintain appropriate tensile strength.
In summary, purchasing optical fiber is a nuanced process that goes beyond merely considering the price or the number of cores. Buyers should comprehensively assess the optical cable's structure, materials, manufacturing techniques, and performance specifications to make an informed decision.
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