EoW July 2013

Focus on

cables: high voltage. Water-blocking is generally required only in medium and high voltage cables that use cross linked polyethylene (XLPE) insulation. In copper cabling water can ingress into the cable by diffusion through the outer polyethylene sheath. This is a high risk occurrence due to the fact that such cabling is typically laid underground in areas likely to be damp and wet. The presence of water will degrade signal strength due to capacitance changes. an optical cable core is accomplished by surrounding it with a dry water-swellable tape and yarn that will stop the entry and migration of water should the cable’s outer jacket be breached. This protective measure is included primarily to maintain the mechanical integrity of the cable itself (eg prevent ice crush from within the cable, fungus growth, or corrosion of metallic cable members when present). The water-blocking protection is placed in the buffer tubes with the optical fibre during manufacture of the cable. Technical Absorbents – UK Website : www.techabsorbents.com low, medium and Water-blocking protection of

If the construction of the cable is two layer, with an inner insulating layer and an outer to provide the oil resistance, the inner layer can be without flame retardancy and SX554 is an ideal flexible choice. If the construction requires additional fire performance then SX-0612 is recommended, or SX559 for the highest fire performance. AEI Compounds Ltd – UK Website : www.aeicompounds.com Long-term stability It is almost one year since Anglia Metal began manufacturing plain and tin-plated copper wire in the UK for export worldwide, and the company continues to grow and is showing long-term stability within the copper market. Anglia Metal supports a wide and highly demanding range of industrial sectors such as automotive, data, power, defence, specialised cables and various other applications using copper wire. Quality requirements of these markets are ever increasing and the company is continuously developing systems and improving its processes, flexibility and knowledge. As a BSI-approved company, quality is a key factor to providing first class products to its customers. Anglia’s aim is to progress with its continued excellence in customer service and expand the business into other areas. Anglia Metal Ltd – UK Website : www.angliametal.com Leading SAF TM technology Technical Absorbents provides high levels of innovation and product development expertise to the global cable market with its Super Absorbent Fibre (SAF TM ) technology. The basic functionality of SAF TM is its ability to absorb up to 200 times its own weight in water, or 60 times its own weight in saline, at an extremely fast absorption rate. Being fibre-based, it can be precisely tailored into a diverse range ▲ ▲ Copper wire from Anglia Metal

of non-woven tape and yarn formats that offer the potential for enhanced design and performance. SAF TM is already a key component for spun yarns and non-woven tapes that provide optimum protection for internal and external cable applications. This dry active system of water-blocking protection for cable cores affords prevention of water passage along the cable from a joint or point of sheath damage. This is achieved by a water-swellable yarn or tape being placed within the cable during manufacture. In some instances, cables that suffer damage can start to take on water. If a SAF TM containing tape or yarn is in place, this will rapidly absorb the liquid at the point of entry and swell to form a gel, blocking any further water ingress. This ensures any damage is minimal, fully contained and is easy to locate and repair. This situation can occur in many different cable types, including telecoms, medium and high voltage, industrial and underwater. Without such water-blocking technology, the results of water ingress into the cable can be costly and very problematic.

There are three types of power

Features: • Improved bow strength (no holes) • Wire is out of the airstream • Bow shaped like a wing for improved aerodynamics and low cw factor • Wear strip eliminated and replaced by wear bushings with windows for easy inspection and dust cleaning • Wear bushings can be changed while bow is mounted on the rotor Advantages: • Lower power (amps) consumption and reduced noise • Higher TPM – maintaining wire quality • Reduced bow breakage • Increased life on wear surfaces reducing down- times andmaintenance • Wire breakds are contained within the bow – extending bow life

USPatent# 6,233,513 # 5,809,703 andOther PatentsPending

KEIRManufacturing Inc.

Phone:

+1. 828.885.8444 800.992.2402 +1. 828 884.7494 Sales@KEIRmfg.com

Phone USA

Fax:

E-mail:

Website:

www.BackBoneBows.com www.KEIRmfg.com

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September 2012 July 3