/images/buttons/swirl_60.jpg/images/southwire_100x70.jpgSouthwire Thinks Small to Boost Urban Powersouthwire-thinks-small-to-boost-urban-power.htmDensFlex(TM) MV cables help utilities pack more power into existing city duct banks
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Southwire Thinks Small to Boost Urban Power

DensFlex™ MV cables help utilities pack more power into existing city duct banks.

Power demands in cities never go down, they only go up. Apartment dwellers add HD televisions. Businesses add computers. But adding urban power capacity can be a challenge for utilities. Existing conduits may be 70 – 80 years old, small in size, and deteriorating with age. Installing new duct banks in metropolitan areas can be prohibitively expensive. Southwire has solutions.

"When existing conduits are too small to allow capacity increases with conventional cable designs, Southwire can help with high-capacity, reduced-diameter cables from the DensFlex™ MV product line," says Joe McAuliffe, Senior Product Engineer for Southwire's Energy Division. "DensFlex MV cables help utilities avoid costly infrastructure upgrades."

Individual designs deliver maximum power capacity

DensFlex MV cable designs are individually engineered to provide maximum capacity for each application.

  • Southwire engineers work with allowable voltage stresses, fault-current estimates and expected operating conditions to design high-efficiency, reduced-diameter insulation systems. Available EPR insulations increase flexibility for easier installation.
  • Conductors are typically copper for maximum conductivity. Compact stranding reduces diameter by 9 – 10 percent over conventional stranding.
  • Shielding may use concentric flat-strap neutrals that deliver high fault-current capacity with minimum diameter.
  • Southwire matches outer cable jacket material and thickness to duct conditions and expected fault-condition temperatures. Materials include linear low-density polyethylene, polypropylene, and high-density polyethylene. Other options include Southwire PowerGlide® MV jackets that reduce pulling friction, and cross-linked polyethylene jackets that allow higher shield temperatures.

Choose conductor size, construction and delivery options

DensFlex MV cables are available in single-conductor or triplexed constructions, with conductors from 4/0 AWG to 1000 kcmil. Southwire can manufacture even larger sizes on request. "Utilities can order master reels or custom lengths that reduce waste," McAuliffe says. "Southwire inventory management programs can reduce warehouse and inventory costs."

For more information on DensFlex MV products, contact your Southwire sales representative or visit www.Southwire.com/densflexmv