Installation of 400m of double circuit 400kV cable on behalf of Balfour Beatty for a new substation build in conjunction with Mitsubishi electric
Location
Stamford, UK
Client
Mitsubishi (National Grid)
Main Contractor
Balfour Beatty
Value
£1.1m
Challenges and Solutions:
The project involved the installation of a new 400kV cable circuit to support the future upgrade of the East Coast Mainline. The circuit, which is a two-phase, 104MVA, 400/27.5-0-7.5kV SGT1 circuit, was laid in both cable duct sections and on above-ground steelwork as it approached the cable terminations.
The work also included the provision of new XLPE 630mmÇ copper cable for the SGT2 circuit.
Balfour Beatty were to supply all necessary ducts and CSE (cable sealing end) structures. Additionally, all new circuits were terminated onto the newly supplied CSE structures.
Scope of the project:
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Duct installation
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Cable installation
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Joint Bays
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Associated civil works
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Scaffold installation
