August 2005

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Dow Wire & Cable is committed to working across the entire industry value chain to better understand the needs and interests of all involved. We are increasing our efforts to work with End Users of our products and support their initiatives with research, design, engineering and new materials. We value your time and appreciate your cooperation in this initiative. We believe that it benefits the industry as a whole and I encourage you to register at no cost to receive upcoming issues of Point-To-Point directly by e-mail.

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The Performance of XLPE Water Tree Resistant Insulation Systems Against the Requirements of DIN VDE 0276-605/A3

by M. Aarts, J. Kjellqvist, A. Mendelsohn and K. Vaterrodt

Polyethylene was introduced as an insulation material for electric power cable more than 40 years ago. Its inherent characteristics of toughness, resistance to chemicals and moisture, low temperature flexibility and excellent electrical properties, along with low cost and easy processability, make it a very desirable material for insulating low, medium and high voltage electric cables. There have been a number of significant advances in materials technology that have contributed to polyethylene's continued worldwide position as the material of choice for insulating cables.

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Increasing use of laminated copper sheaths in MV, HV cables

In both medium voltage (MV) and high voltage (HV) cables, a 0.15 mm (6 mils) thick copper coated (on one side) laminate sheath can be used as a moisture and chemical barrier over the cable core. The copper sheaths offer a viable alternative to other metallic sheaths, for instance, lead and pipe type cable with oil-filled paper insulation, and are gaining increased acceptance.

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Global Industry Events

CIRED: 18th International Conference and Exhibition on Electrical Distribution (CIRED) June 2005, Turin, Italy

Wire Russia 2005: June 2005, Moscow, Russia

ICC 2005: April 2005, St. Petersburg, Florida USA

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Meeting the new CENELEC standards

The German requirements of the harmonized standard CENELEC HD605 S1, named DIN VDE0276-620/A3 are now in place. The requirements are the toughest of the different European requirements for two-year aging in water. Dow recently completed a series of two-year tests with the three different types of insulation materials sold. The best performance was achieved by water tree resistant products such as HFDB/K-4202 EC.

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High voltage and extra high voltage cable usage grows

Extruded high voltage (HV) and extra high voltage (EHV) dielectric cables are an important factor in HV transmission and their usage is growing around the world. Because the insulation is made from specially designed polyethylene, these cables have very low dielectric losses. And, because they are crosslinked, they have excellent thermal and mechanical aging characteristics and higher permissible operating temperatures than paper-oil cables.

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Dow Wire & Cable is at your service

Dow Wire & Cable has led the industry for more than 60 years with products and technology for power, communications and specialty applications. Our goal is to provide the broadest range of materials and expertise you need to add longer life, better performance and consistency to your systems. And we continue to set industry standards worldwide for cleanliness, consistency, reliability, performance and quality.

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