|Project||400kV Substation Earthing Assessment and Design|
The site is a 400kV substation with two L2 double-circuit overhead lines and four 400/132kV transformers that feed an adjacent 132kV substation. The existing perimeter fence and security system were to be upgraded as part of the security upgrade works. ERM was engaged to provide an earthing design for the new fence and security systems and ensure the site earthing system was in good condition prior to work commencement. On completion of the survey, a report and CAD drawing were provided, detailing the investigation, remedial action / repairs for the earthing system and the fence earthing design.
ERM’s expertise and experience of earthing condition surveys at large sites was instrumental in providing a detailed report on the condition of the earthing system and an earthing design for the new fence line. ERM was able to liaise effectively with the client, providing detailed methods statements and risk assessments and managing high levels of on-site safety. The survey required minimal client planning input. Where possible ERM will carry out further investigations to pinpoint the cause of any problems or issues found, to enable a swift and cost effective solution.
Earthing condition assessments on live high voltage sites can be challenging.
The factors below were important in successfully completing the project: