Nexans 33kv cables for onshore windfarm projects are now available with a conductive outer skin on the protective sheath, this innovative feature assists the installer in testing for sheath damage. This conductive outer skin feature represents one of Nexans "Windfarm Innovations Program" which covers a range of features for cables and associated services which can improve the overall efficiency of an onshore windfarm installation through reducing installation time and overall costs. The cables used to convey power between the wind turbines and the collector substations are laid directly in trenches which can often cross challenging terrain. A common problem on sites is that the cable sheaths are damaged by stones or other obstacles during laying but this damage is not discovered until the cable is buried and testing is being carried out. On standard cables, in order to make a "sheath test" (which measures the resistance between the cables metallic screen and the outer sheath layer), the outer sheath needs to be in contact with moist soil/sand to provide a return electrode for the test. This means the test can only be performed satisfactorily once the cable is buried in the ground. By supplying cables which have a very thin skin of conductive material, testing can be done without the need for the cables to be buried. An initial test can be made whilst the cable is still on the drum to establish whether the cable sheath is intact before beginning to lay it in the ground, the test can then be repeated as soon as the cable is laid in its’ final position before the cables are blinded with soil or sand. Any damage to the sheath can found from the test and repaired without the expense and lost time of having to excavate the surrounding soil /sand. A further feature is to have the sheath in a natural colour with the conductive skin as black. This assists in the identification of any sheath damage as the natural colour of the sheath is visible through the black layer at the site of damage. The semiconductive layer is also a perfect way to detect sheath errors of cables installed in ducts. Even if the duct is dry during installation; this may change during its’ lifetime. Once water has entered a duct it normally stays there and may damage a cable with an existing sheath error in this area. With a conductive layer the cables can be tested before and after installation into ducts to be sure no sheath error is present which could reduce the cables’ lifetime.

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Tel: +44 (0)191 490 1547
Fax: +44 (0)191 477 5371
Email: northernsales@thorneandderrick.co.uk
Website: www.cablejoints.co.uk
www.thorneanderrick.co.uk
Turnkey cable solutions
to better deploy your windfarm infrastructure

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expertise supports your network’s evolution
Both on land and offshore,
Nexans has the expertise
to interconnect large wind
turbines and complete
windparks to local or
distant grids. For medium
and high-voltage cables,
we are one of the few
companies who can
oversee complete
installation, from initial
pre-qualification, design,
customized production,
logistics, installation, testing
and pre-commissioning.
This includes all accessories
as well, a key element in
any failsafe energy network.
Offshore, we supply and
install the marine MV links
between wind turbines and
the transformer platform,
and also the MV or HV
transmission link to the
onshore substation.
Beyond this we have a full
range of transmission and
distribution cables for
bringing local power
production to the grids.
Not only do we provide
a full range of energy
cables and services,
we are also experts in
the telecommunications
infrastructure needed
to manage windparks,
including control and data
cables, copper and fiber
Local Area Networks.
Nexans expertise for a
revolutionary technology
• World supplier of underground
cables, submarine cables,
overhead conductors
and data/telecom systems
• Close partnership with
developers, power utilities,
installers and contractors
• Mastery of maritime
conditions based on oil
& gas submarine energy and
telecom cabling experience
• Unsurpassed onshore
and offshore installation
experience and design
capabilities, using advanced
equipment, special software
for overhead transmission
line and dynamic cable
applications
• Complete range of
accessories: purpose designed
joints, terminations, transition
joints between various types
of cable.

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Winds of change for the energy industry
The international wind industry
market is continuing to
achieve record growth. In fact,
despite occasional lulls, wind
power has held its position as
the world’s fastest growing
energy source, with over 30%
growth yearly. According to
experts, free, abundant and
inexhaustible wind has the
potential to be an 80 billion
Euro annual business by
2020! Even today, wind
produces enough electricity to
satisfy the needs of 50 million
people worldwide. At present,
73% of global wind energy is
produced and consumed in
Europe. By 2020, it is
estimated that 12% of the
world’s energy will be
produced by wind in some
50 countries. Some recent
trends include: a move from
onshore to offshore installations,
the steady upscaling of wind
turbine power output, and an
upswing in demand around
the world.
Power utilities and independent
power providers are turning
to windfarms as an alternative
to traditional fossil-fuel based
energy. This is also being driven
by continuously expanding power
demands and the concern of
many countries to fill the gap
with a certain percentage
of renewable energy.
The switch requires new kinds
of expertise. On land, the
steady upscaling of old
turbines, and ever-bigger
generators mean that the
network must have room for
added output, and be capable
of making multiple
connections and reliable links.
Since the available space for
land-based wind turbines is
limited in Europe, most recent
projects are offshore, and
some even far offshore
(50 to 200 km). This requires
submarine cables, maritime
installation expertise, and a
mastery of long-distance
transmission techniques.
Finally, there is the problem
of connecting variable energy
– with its sudden highs and lows
depending on wind velocity –
to a grid that demands,
above all, stable energy.
What wind park power
utilities expect from
cable manufacturers:
• Expertise and engineering
assistance at the design
stage, including feasibility
studies
• Onshore and offshore
turnkey capability for
transmission and
distribution. This includes
full mastery of installation,
both in remote land-based
and offshore sites,
including specialized
installation equipment.
• A comprehensive range
of high-quality windfarm
infrastructure cables and
accessories from one
supplier at competitive
prices
• Constant innovation to
meet evolving technologies
and standards

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provides a comprehensive range of cables for windfarm infrastructure…
Medium-voltage cables
• Onshore underground
single-core cables (typically
33 kV) connect the rows of wind
turbines and, in parallel, links
them to an onshore substation
• Offshore cost-efficient
submarine 3-core copper
cables with integrated fiber optic
elements and customized armor
designs to link the turbines.
For Horns Rev Offshore
Windfarm (Denmark) Nexans
supplied, laid and turnkey
installed all inter-turbine cables
and radial connections to the
transformer platform.
For Arklow Bank Offshore
Windfarm (Ireland) we
supplied inter-turbine cables,
as well as the 16.5 km exporting
cable leading to a cable-station
close to shore.
High-voltage cables
for transmission
• Onshore AC transmission:
cables ranging from 60 kV
to 500 kV, XLPE insulated,
are used for power transmission
from the onshore windpark
substation to the central grid.
• Offshore AC transmission:
submarine cables ranging
from 60 kV to 500 kV with
various designs available:
3-core XLPE cables (60-225 kV);
single core XLPE up to 400 kV.
• Onshore and offshore DC
transmission up to 500 kV
applicable for high transmission
requirements and long distances:
mass-impregnated cables with
an Integrated Return Conductor,
and Polymer-based insulated
DC cables.
For Horns Rev, Nexans
designed, manufactured
and successfully type-tested
a 21 km long 150 kV 3-core
submarine cable, which was
installed in three days between
land and an offshore substation,
using a special cable-laying ship.
Overhead MV
and HV conductors
Although most inter-turbine
connections (MV) are
underground for land-based
windparks, overhead aluminumalloy conductors are used to
move power from a distant
location to the domestic grid.
Nexans provides a wide range
of sizes and alloys according
to customer needs, with various
alloys adapted to each country’s
standards, climate and terrain.
All MV and
HV accessories
Normally, subsea cables should
not have joints. However,
Nexans supplies purposedesigned joints and terminations
for XLPE insulated cables,
as well as transition joints
between various cable types.
Fiber optic
data cables
Nexans manufactures
terminations and joints which
make splicing quick, easy
and long lasting.
Auxilliary equipment
and systems
Corrosion protection systems;
mechanical support and
protection systems (hang-off
and clamping systems,
protective shells⁄slabs⁄mattresses).
Nexans hang-offs securely
fasten heavy energy cables
on top of the J-tubes, well
above sea level. They are
easy to install, and fully
relieve any pulling force on
the sealing ends.
Local Area Networks
Medium-voltage
cables
Cable installation
software

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Auxilliary equipment
and systems
Special laying
vessels,
Capjet trenchers
and Spider dredger
All MV and HV
accessories
High-voltage cables
for transmission
offshore
Fiber optic
accessories
High-voltage cables
for transmission
onshore

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…to improve power output and performance
Fiber optic data cables
Whether onshore or offshore,
optical fiber cables are
increasingly being twinned
with MV and HV energy
cables to provide remote
control of rotor speed, blade
angle, braking, temperature,
hydraulic levels, etc. via
distant Programmable Logic
Controllers (PLCs) which
have now replaced sequential
relay circuits for machine
control.
Overhead MV and
HV conductors
24 optical fibers were integrated
into the submarine power
cable for the Arklow wind
turbines off Ireland, 12 optical
fibers into the submarine
cables for Horns Rev, and
12 optical fibers into the
submarine cable linking landbased wind turbines on the
island of Smøla (Norway) to
the mainland.
Fiber optic accessories
Nexans produces a full
range of fiber access routing
technologies, including splicing
and modular distribution
frames. Nexans’ FiberArt TM
splicing modules optimize
fiber routing in towers and
substations.
To make the connection
between submarine cables
and terrestrial networks,
Nexans has an entire range
of waterproof closures.
Local Area Networks
To assure high levels of windfarm and local infrastructure
security, Nexans has both
advanced fiber and copper
LAN solutions for complete
monitoring, control and
communications/surveillance
functions.
The kind of data speeds
previously available onshore
are now available offshore,
which means that power utilities
can now plan a decade ahead
without expensive retrofitting.
Cable installation
software
Power Line Systems (PLS)
software ideally positions
aerial conductors on the
terrain in terms of conductortype, terrain profile, spans,
length, etc.
For marine conditions, Nexans’
custom software determines
ideal cable design according
to wind tower behavior in
a dynamic environment.
Special laying vessels
and Capjet trenchers
and Spider dredger
To meet the submarine cable
challenge, Nexans operates
special cable laying vessels,
Capjet seabed trenchers and
the Spider dredging system.
Nexans’ family of Capjet
Remotely Operated Vehicles
have already buried more
than 3,500 km of cables and
pipelines worldwide, protecting
them from ship anchors
and trawling equipment.

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Nexans… integrating synergy throughout your network... and beyond...
To help you meet your
goals of efficient
installation, especially
offshore, and broad
network reliability,
Nexans goes beyond
cable to offer a number
of important services:
Expertise
Over many decades, Nexans
has accumulated expertise in
onshore, aerial and offshore
energy/telecom cables,
components and installations.
We also understand the
overall energy context, from
power generation,
to transmission and final
distribution within national
and international grids.
We are especially concerned
with finding the most suitable
cable solution to meet customer
expectations, though cable
types and standards vary
widely across the world.
Global presence
Being pre-qualified in many
countries around the world
for infrastructure, we are
well-positioned to take on
multi-supplier projects and
international joint ventures,
providing an offer that
goes both upstream and
downstream. With plants
on five continents and
representatives in over
65 countries, we can follow
them with ease. We can
even count on our local
production plants to provide
power utilities with needed
cable on the spot. Nexans
stands behind each of its
products, wherever it is
manufactured. Our name
is our guarantee. We are
key players on a host of
windfarm infrastructure
projects, both onshore and
offshore, worldwide.
Performance
We execute your projects
within strict deadlines, and
this includes installation
which can depend on
variable “weather windows”
using advanced surveying,
and laying equipment.
Since technical specifications
are often locally-determined,
we do our utmost to find
appropriate and
interconnective solutions.
Given the fluctuating nature
of wind power production,
at every point in the network,
we seek innovative ways to
reinforce the stability and
consistency of power
production, transmission
and distribution.
Our various tested and
durable accessories play
an important role, too.
`
Partnership
We are concerned with
developing solutions for
tomorrow’s low-carbon
environment in which wind
power will play a leading
role. Sometimes this is done
internally within the Nexans
research and development
resources. But this is also
carried on intensely with
outside firms who have
complementary skills and
products. By working
together, we aim at finding
cabling solutions which will
be beneficial to all parties
involved. The important
thing is to bring value to the
table for each and every
project, and develop
cooperative solutions which
will lay the foundations for
secure energy distribution in
the next quarter century.

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Global expert in cables and cabling systems
Nexans is the worldwide leader in the cable industry,
with an industrial presence in 29 countries and
commercial activities in 65. The Group employs
17,000 people. Its sales amount to 4 billion Euros.
Nexans brings an extensive range of advanced copper
and optical fiber cable solutions to the infrastructure,
industry and building markets. Its cables and systems
can be found in every area of people’s lives,
from telecommunications and energy networks,
to aeronautics, aerospace, automobiles, railways,
buildings, petrochemicals, medical applications, etc.
Tel: +44 (0)191 490 1547
Nexans S.A. - 16, rue de Monceau - 75008 Paris - France
Fax: +44 (0)191 477 5371
Tel: +33 (0)1 56 69 84 00 - Fax: +33 (0)1 56 69 84 northernsales@thorneandderrick.co.uk
Email: 84
www.nexans.com - www.nexans.com/e-service
Website: www.cablejoints.co.uk
marcom.info@nexans.com
www.thorneanderrick.co.uk
Photos: © Digitalvision - Nexans may make changes to the technical specifications of its products, in particular to make improvements thereto or to ensure compliance with applicable laws and regulations.
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