Cable Applications

Electrically semiconductive PRE-ELEC® plastics for cables

There are several global trends that impact cable markets and demand. Legislation in the Nordic countries and Europe is pushing to increase underground cable infrastructure to minimize storm damage.

Underground cabling has been an ongoing trend for several years now.​ In warm climates like Australia and California, the trend is towards covered overheadline cabling to avoid ground fires.

To reduce CO2 emissions, there is a huge need to invest in wind and solar farms. This will require a great amount of cabling in various green energy solutions. 

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Overhead line cables — Underground cables

Premix solutions

A cable with a conductor screen has a longer service life as the screen protects the outer structure from premature breaks caused by high electrical stress. Premix’s plastic compounds are produced by adding carbon black in the selected plastic formulations.  

Carbon black has established its position as the most widely used electrically conductive filler. Carbon black offers a superior price-performance ratio and stable properties over time.

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A cable with a Conductor Screen has a longer service age as the screen protects the outer structure from premature breaks caused by high electric stresses.

Solutions offered by the PRE-ELEC® portfolio​ 

In medium voltage cables, a semiconductive screen around the conductor and insulation is a must. Cross-linked Polyethylene (XLPE) is a commonly used thermoplastic in medium voltage cables, but it can be replaced with Premix's Polypropylene (PP) -based PRE-ELEC® compounds. 

Benefits of using polypropylene — The PP-based components are recyclable. Producing them creates lower CO2 emissions (up to -40%). The energy-intensive crosslinking stage can be skipped in production. Cables made with PP can be used in higher service temperatures. 

Cables with voltages of over 6 kV need to have a conductor (and insulation) screen made of semiconductive plastic. ​Without this semiconductive layer, too high electrical stresses may be directed to the insulation, and premature breaks can occur. 

Underground Cables

Underground cabling provides increased reliability for the transmission grid  as it is not prone to extreme weather conditions. 

Premix’s portfolio covers high-quality semiconductive Polypropylene (PP) and Polyethylene (PE) compounds, with stable product properties and materials free of impurities. Also, TPE- and TPU-based elastomers are included in the PRE-ELEC® portfolio. 

PRE-ELEC® PP18220 is the perfect match developed for PP semiconductive screen application. It matches the flexural modulus of XLPE, has excellent dispersion and conductivity, while also providing the benefits of PP plastics. Premix has state-of-the-art production equipment and decades of accumulated polymer know-how at your service. 

More information on suitable grades can be found in our Data Center.

Covered Overhead Line Cabling

The continuous supply of electricity is a critical factor in today’s society. However, the electricity supply has become even more fragile due to extreme weather conditions. Breakages in power cabling cause risk for electricity supply but can also cause forest fires and endanger wildlife. These risks can be reduced with covered overhead line cables.

Covered cables improve safety for the environment and installers. ​PRE-ELEC® compounds offer a high service temperature, an operating temperature even up from 90ºC of XLPE.​ Premix’s Polypropene (PP) -based solution is a perfect match for overhead line cabling.

PRE-ELEC® PP18220 is a perfect match developed for PP semiconductive screen application. It matches the flexural modulus of XLPE, has excellent dispersion and conductivity, while also providing the benefits of PP plastics. More information on PP18220 is available in our Data Center.

More information on suitable grades can be found in our Data Center.

Semiconductive Jackets

A jacket protects the cable from mechanical damage during and after installation. While also being semiconductive, the jacket removes the risk of charge build-up due to capacitance. The cable jacket is the first line of moisture, mechanical, chemical, UV and ozone defense for a cable.

Why use semiconductive High-density Polyethylene (HDPE) plastics for cable jacketing?​

  • HDPE provides the optimal balance of flexibility and abrasion resistance.
  • HDPE is a recyclable thermoplastic, unlike PVC, which is widely used in jacketing.
  • Premix's PRE-ELEC® PE18664 has high Environmental Stress Cracking Resistance (ESCR), even if HDPE typically has poor ESCR values.
  • PRE-ELEC® PE18664 is an optimized compound for semiconductive jacketing in HV and EHV cables.

More information on suitable grades can be found in our Data Center.

EMI Shielding

EMI Shielding is needed in the aviation industry, the automotive sector, and many other industries.

Why use PRE-ELEC® PP18147 for EMI shielding applications?​

  • Protects sensitive electronic components from electromagnetic interference (EMI).
  • EMI or EMC prevention has traditionally been pursued with metals such as copper or zinc, novel material solutions also include EMI shields made of conductive plastics.​
  • Semiconductive plastics are lightweight and enable corrosion resistance.​
  • Premix’s material solutions are isotropic semiconductive.

More information on suitable grades can be found in our Data Center.

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