ABB EHV 275kV Cable Sealing Ends & GIS Cable Terminations

Published 02 Dec 2019

ABB EHV 275kV Cable Sealing Ends & GIS Cable Terminations

Images Courtesy: Richard Mason – EHV Jointer for Onshore & Offshore work up to 245kV (SMSTS) – Global Cabling Services Ltd

GCS Jointing

GCS Jointing is a trading name of Global Cabling Services Ltd and was founded in 2015 when Richard Mason (Director GCS Jointing – Global Cabling Services Ltd), decided to leave a major power utilities contractor after many years of quality service. Richard is an EHV Jointer with over 25 years of experience  – with a practical approach to HV EHV projects the work GCS undertake is often installed and supervised on site by Richard personally. GCS Jointing is recognised as a specialist HV and EHV Cable Jointing and Cable Installation Sub-Contractor within the onshore and offshore utilities, oil-gas and clean energy industries.

ABB

Cable Sealing Ends

Cable Sealing Ends

Cable Sealing Ends

The cable termination consists of an insulator installed on a box body made of aluminium castings. The box body consists partly of insulating material, which provides an insulated installation for high voltage power cables. The base part is to be installed on a supporting bracket. For 420kV a corona shield and a post insulator kit PIU 420 B/G are included with the cable sealing end. The elecrical stress control component is a premolded rubber stress cone. The insulator has sheds of short-long type and is filled with synthetic insulating oil.

The composite insulator design includes grey silicone rubber sheds and a fiberglass reinforced epoxy resin hollow core. It is light-weight and less sensitive for outer damages. The porcelain insulators are available in brown on request. A bolt clamp in the top fitting is used to connect the conductor to the top bolt. Top bolt and bolt clamp are included in the kit. For the maximum permitted diameter over the cable oversheath and the diameter over prepared XLPE cable insulation – the cable sealing end provides a fixed connection point once lifted into place to secure the cable termination.

Skilled Cable Jointers

Workmanship and Competency in the installation of MV HV cable accessories, including Joints and Terminations, is regarded as critical to the performance and reliable of power cable systems – skilled workmanship during installation by the Jointer is very important when considering and reducing the risk of future cable failures. When preparing HV cable several layers need to be removed or treated without damaging other layers, this requires the highest levels of skills, training and knowledge about how to handle specialist Jointers tools for this application. Knowledge about the critical steps in cable accessory assembling provides the best foundation for successful and safe installation.

ABB

ABB pioneered high voltage gas-insulated switchgear (GIS) more than 50 years ago and is a global leader offering a full-range product portfolio with voltage levels from 72.5kV to 1200kV matching current and future requirements for modern switchgears and power grids.

As a market leader in high voltage GIS technology, ABB has a global installed base of more than 35,000 bays. In a power system, switchgear controls, protects and isolates electrical equipment to boost the reliability of power supply.

GIS is a compact metal encapsulated switchgear consisting of high voltage components such as circuit-breakers and disconnectors.

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Further Reading