January 2022 Vol. 1

Cable News Alerts (CNA)- The Leading Source of Industry News on Power Cables and Cable Insulation

NEWSMAKERS: * Cable News Alerts * CNA * ExcelPlas * General Cables * Hellenic Cables * Ketraco * Leoni * Nexans * NKT * Prysmian * XLPE


German Cartel Authority Investigating Cable Manufacturers for Illegal Price Fixing
NKT, Nexans and Leoni Among Companies ‘Cooperating’ with Federal Officials


Nexans to Deliver Cables for New York’s First Offshore Wind Farm

Nexans to Build 110km Subsea Power Cable for U.S.

Prysmian Investing 200m for Submarine Cable Plant In US

Prysmian Group Finalizes EKSA Acquisition

Leader in Energy, Telecom Cable Systems, Prysmian Announces Merger with General Cable Industries

Leoni Wire Closing its Chicopee location in February 2022

China Firm Sues Ketraco over Sh2bn Transmission Contract

Hellenic Cables Completes Virginia Offshore Wind Project

Prysmian Group Secures a Landmark HVDC Submarine Cable Project in the Middle East

Hellenic Cables Delivers for Dominion Energy

Specialized Cable Testing Laboratory – NATA Accredited
Chemical / Physical / Durability / Mechanical Testing / Failure Analysis of Cable Products

Determination of End of Life of Cables
End of life (EOL) vary with the cable type, the installation and conditions under which the cable is operated, and vary from installation to installation. Cable life can be extended in most cases, depending on the condition of the cable.  The lifetime of a power cable depends on its ability to carry the rated current safely at the rated voltage without excessive loss or failures. Cable failure is a breakdown of the insulation surrounding the conductor and subsequent leakage of current to earth or between conductors. Insulation breakdown may be total, resulting in a high fault current, resulting in leakage current.  On the technical side, medium voltage cables fail due to a phenomenon called water trees. Water trees can grow from the inside of the cable out, from the outside of the cable in, or from defects within the insulation. As they grow, they look like trees or bushes. Water trees grow until they can no longer hold the voltage stress and an electric tree is formed. Once an electrical tree is formed, the cable usually fails within two weeks.
Failure results as partial discharges erode the wall of the void in which they occur. The erosion of each discharge in a void increases the size of the void and so decreases the partial discharge inception and extinction voltages for that void. This self-acceleration means that any PD occurring at operating voltages is likely to lead to rapid failure.


Detecting XLPE Cable Insulation Damage Based on Distributed Optical Fibre Temperature Sensing

Fabrication of Self-healable Thermoplastic Polyurethane by Masterbatch Technology for Cable Insulation

Enhanced Electrical Properties of Styrene-Grafted Polypropylene Insulation for Bulk Power Transmission HVDC Cables

MV Underground Distribution Network Failures and Correlation to Ambient Variables

Borealis Develop Highly Insulating Thermoplastic Blends Comprising a Styrenic Copolymer for Direct‐Current Power Cable Insulation

Study on the Molecular Structure Evolution of Long-Term-Operation XLPE Cable Insulation Materials

Electrical Tree Growth Structural Analysis of XLPE Cable Insulation under Different AC Voltage

An Investigation and locating Water tree degradation in Power Cable Insulation based on Pulse Voltage

Failure Analysis of Medium Voltage Single Bonded Cable System

Charge Transport in Full-Size HVDC Cable Joint with Modelling of XLPE/EPDM Interface

Enhanced Boron Nitride/Polyolefin Blends for High Voltage Applications

Polypropylene-Based Soft Ternary Blends for Power Cable Insulation at Low-to-High Temperature

Research on Aging Performance and Mechanism Analysis of Cross-linked Polyethylene Wire and Cable Materials

Radio-Oxidation Ageing of XLPE Containing Different Additives and Filler: Effect on the Gases Emission and Consumption

Fire Growth Rate Index as a Key Fire Characteristic of Electrical Cables

Study on Melting Characteristics of Crystals in Thermal Aged XLPE Cable Insulation at Elevated Temperature

Book Chapter on Thermoplastics for Cables


How to Get Noticed by More Than 48,000 People in the Wire & Cables Insulation Space Across the Globe
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This Newsletter is brought to you by the Australian Cable Material Testing Laboratory (NATA Certified)

ExcelPlas Cable Insulation Testing Laboratory Capabilities:
-DSC Thermal Analysis to identify melting point, Glass transition (Tg) and Thermal Stability (OIT)
-FTIR Infra-red Analysis for compositional analysis of polymers and additives
-TGA Thermogravimetric Analysis for weight loss with loss of additives, oils, polymer decomposition, filler levels
-X-Ray Analysis (EDS/XRD) to identify the crystalline phase and composition of inorganic additives
-Carbon Black Content (ASTM D1603, AS/NZS 2904 Clause 7.4.5 which uses AS 1463 Appendix B)
-Carbon Black Dispersion
-Oxidative Induction Time (OIT)
-Melt Flow Index (MFR)
-Stress Cracking Resistance Testing (ESCR testing)
-Failure Analysis (processing, water treeing, contamination ID, etc)

Examples of Polymer Materials Excelplas Can Test:
XLPE and HDPE Cable Insulation Testing (QA, QC, incoming raw materials)
* PVC (V-90) (Soft (plasticised) Polyvinyl Chloride compound)
* XLPE (X-90, X-HF-110) (Crosslinked Polyethylene)
* Rubber (R-EP-90, R-HF-90, R-HF-110) (Ethylene Propylene Rubber).

ExcelPlas Undertakes the Following Cable Testing as per AS/NZS 5000 and AS/NZS 3808:
* Measurement of thickness of insulation and sheath (sample test)
* Tensile strength and elongation of insulation and sheath material – before ageing (type test)
* Tensile strength and elongation of insulation and sheath material – after ageing (type test)
* Loss of mass of insulation and sheath (thermoplastic materials only) (type test)
* Pressure test at high temperature of insulation and sheath (thermoplastic materials only) (type test)
* Heat shock (thermoplastic materials only) (sample test)
* Hot set test (cross linked materials only) (type test)
* Exudation of plasticizer (thermoplastic materials only) (type test)
* Compatibility test of cables materials (type test)

Other Cable and Insulation Testing Offered by ExcelPlas NATA Labs:
• Shore A/D Hardness
• Density Determination
• Accelerated Weathering testing
• Charpy and Izod Tensile Tester
• Laboratory press for preparing samples
• Plasticizer extraction analysis apparatus
• Loss in Mass (volatility) analysis
• Limiting Oxygen Index (LOI) Analysis of Cables
• Wire Insulation Abrasion
• Testing Composition of Low Smoke Zero Halogen Cables
• Testing of %Crosslinking of XLPE Cables
• Testing of Tree Retardant XLPE Cables
• Identification of Contamination/Foreign Matter
• Determination of % Carbon Black in Cable Sheathing
• Determination of Filler Content/Composition in Cable Insulation
• Limiting Oxygen Index of Flame Retardant Cables
• Plasticizer Level and Content of PVC Insulated Cables
• Compliance Testing of Important Cable to Ensure it is Compliant with Australian Standards

Copyright 2020 Cable News

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