Offshore Substation High Voltage Cable Re-alignment
Published 26 Mar 2021
HV Cable Re-alignment
High Voltage Cable Re-alignment
Offshore Substations
- Special thanks to Geoff Briggs MIET from MGL Cable Services for the kind permission to republish this short case study in Wind Energy Network
When substation high voltage cable routing design and installation specifications do not align, MGL Cable Services bring expertise and professionalism to maintain cable integrity during the re-alignment process.
One of MGL Cable services teams recently stepped up to this challenge by demonstrating those qualities, they successfully delivered a project to re-align previously installed cables on offshore windfarm substations.
Process Preparation
As the cables were required to be removed from the high voltage switchgear this required the removal of the terminations from the switchgear, the terminations were then cleaned and protected from exposure to the harsh offshore elements.
Following the termination protection, the cables protective cable transit blocks and cable cleats were removed, this enabled the team to expertly manoeuvre the cables from the switchgear and safely suspend the cables away from the existing cable containment structure, paying careful attention to keep the cable within the manufacturer bend radius limit and protecting the cable from any sheath damage when manoeuvring to maintain cable integrity.
High Voltage Cable Re-alignment
Once the cable was safely suspended, the cables and containment structure were then modified to re-align the cable routing design and installation specifications.
The process involved manipulating the cable into the realigned cable containment structure whilst maintaining cable integrity and ensuring all terminations aligned with their respective switch gear bushings.
Once the team had effectively accomplished the re-alignment, the terminations were re-greased and re-attached to the switchgear and all fastening torque tightened to required specification. The cables were cleated into final position.
Each cable was the sheath tested to verify the cables integrity had been maintained throughout the process. The team delivered progress reports on a daily basis and sheath testing reports to ensure the client was confident MGL were delivering the high standard and workmanship required to execute the re-alignment process.
Client FeedbackÂ
Feedback from client’s representative commented on ‘genuine experts, real professionals and they were impressed with how the team handled the extreme pressures effortlessly. The team earned my highest recommendations.’
ABOUT MGL Cable Services
MGL Cable Services is a cabling focused electrical engineering company based in the North East of England. Part of the MGL Group of Companies, we have the expertise to fulfil the full scope of a large project or deliver a single service as part of a smaller scope within a large project. Our processes and procedures enable us to deliver consistent outcomes and we share our knowledge and lessons learned with clients and delivery partners.
MGL Cable Services work to high quality standards embodied within our SHEQ management systems, endorsing our Zero Harm policy to provide every client with complete peace of mind. We ensure that customer service and satisfaction are our priority and as a service provider, we work closely with the client to ensure the smooth delivery of services and projects, to specification, on time, and on budget.
Specific expertise includes High Voltage Cable Jointing up to 400kV, High Voltage Cable Testing, Fibre Optic Cable Splicing, Fibre Optic Cable Testing, Offshore Termination & Testing, Project Management, Project Support, Technical Documentation Drafting, Client Witnessing, Civil Construction and Plant, High Voltage Cable Fitters and Specialist Engineering Consultancy.
Thorne & Derrick are Specialist Distributors to the UK and international Offshore Wind & Renewable industry to provide safe and reliable
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