EW January 2011

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EuroWire – January 2011 38
technology news
True sequential footage
gives precision
Cerro Wire LLC, a manufacturer of copper electrical building wire and cable, has
introduced True Sequential Footage™, a sequentially printed cable reel that provides
accurate wire length with each cut.
True Sequential Footage prevents the need to carry excess cable inventory, providing
precision length, accurate footage and cost control. True Sequential Footage uses a
footage mark to document remaining wire, beginning with zero at the bottom of the
reel and ending with the finished length at the top. The accurate footage mark allows
for quick identification of the re-order point, guaranteeing the full purchased wire
length and reducing random lengths. This better controls end-of-reel scrap. The need to
carry excess inventory is reduced with the precision cutting allowed by True Sequential
Footage.
Wire normally lost on each cut made with less accurate cutting systems (3 to 8%) is said
to be saved when True Sequential Footage’s precision footage marking system is used.
CerroWire LLC – USA Website:
Spiral cables
Spiral cables are intended for applications that necessitate repetitive actions of
extension and recoiling. Spiral cables from Galaxy Enterprises have complete
retracement and recoiling qualities, even after stretching up to three times the cable’s
closed spiral length.
The spiral cable can be screened with copper braid or Mylar, or left unscreened.
The conductor diameter range is from 0.2mm2 to 4mm2 of between 2 and 37 cores.
A stretched length from 1,000mm to 10,000mm can be specified, as can the length of
straight ends on both sides of the spiral – usually 100mm. The closed length may be
specified or not. Custom-design cables are available.
Spiral cables are used in a variety of applications, including CNC machines, conveyors
and agricultural equipment.
Galaxy Enterprises – India Fax : +91 22 22085790 Email:
Renewable power
subsea cable
Draka Offshore has fulfilled an order for
11,000m of 20kV subsea cable for the
European Marine Energy Centre (EMEC).
Produced at Draka’s production facility in
Drammen, Norway, the 11,000m of power
cable, weighing more than 300 metric
tonnes, was directly loaded from the
factory to the CS Sovereign vessel owned
by Global Marine Services.
“Because the Draka factory is adjacent to
a deepwater port, load out and logistics
for these large projects is very simple,”
explained Martin Dale, subsea product
manager for Draka. “The cable was taken
directly from the factory and installed in
the field.”
EMEC provides test facilities for a wide
range of technologies that can tap into
the huge potential of wave and tidal
renewable energy.
Wave power alone has an estimated
global potential of approximately
1,000–10,000 GW, in the same order
of magnitude as the world’s electricity
consumption. Located in the Orkney
Islands of Northern Scotland, the wave
and tidal sites are designed to test a
range of machines located down to a
depth of 50m and up to two kilometres
from shore.
Draka Offshore – Norway
Fax: +47 32 24 90 80
Email:
Website:
Crosshead for foamed RF cable
The Rosendahl Crosshead RX 25T for foamed RF cable cores is designed to manufacture the complete RF cable range from ¼" SF to
2¼" F. The basic design comprises an oil heated crosshead with skin application, equipped with an optimised temperature control
to cover expansion rates of up to 86%. Two heating/cooling zones on the crosshead – one for the main body, the second for the
die holder – provide excellent temperature control and even
temperature distribution in the polymer gas melt.
Full natural balancing minimises the shear rates and provides
smooth melt flow for perfect roundness, concentricity and
mechanical stability. Superior manifold technology enables
small formed cells and an homogenous cell distribution at
this high foaming degree.
Temperature control, shear stress, pressure drop and flow
speed optimisation in the crosshead are significant factors
for achieving foam expansion rates on the final cable of up to
86%. This new design is said to enable RF cable manufacturers
to surpass the limitations currently experienced with standard
equipment.
Rosendahl Maschinen GmbH – Austria
Fax: +43 3113 5100 51
Email:
Website:
Crosshead RX 25T covers the ▲ ▲
entire RF cable range