Imperial College

Client’s Challenge

The client required an old 11 kV substation to be relocated and install new 11 kV cabling, associated switchgear, 11 kV / 400 v transformer and new LV distribution cabinet.


London, UK


11 kV


Start Date

September 2018


Completion Date

August 2019

H&MV Solution

• Design drawings such as a single line diagram, substation layout drawing and site layout drawing showing the position of the substation, HV joint bay/joints, earthing and auxiliary systems for UKPN approval.

• Civil Installation including joint bay in the public highway.

• Cable Procurement and Install at HV and LV.

• Design, Install, Procurement and Commissioning of 11 kV Switchboard and associated equipment.

Project Scope

• Ring Main Unit with TLF protection to UKPN SAP Code 14032P

• 500kVA ONAN 11000/433V ECO1 Transformer

• 800A LV Cabinet with 4 outgoing ways

• High voltage and Low voltage earthing design studies

• Design covering installation of earth pits rods bentonite and aux ducting earthing design studies and submission power design submission earthing site surveys and reports for UKPN.

• Commissioning and testing of all installed switchgear and HV cabling.

• Project management and site supervision.

• Termination of 2no. 1C 11kV Triplex cables at the new UKPN substation

• Termination of 3no. 3/4C 600/1000V Waveform cables at the new UKPN substation

• Installation of 1 new light fitting, Distribution Board, and 240V socket outlet to UKPN adoptable and relevant BS standards.

• New earth mat mesh including 2-off earth rod assemblies, earth bar, and connection to earth mat, installed in the new UKPN substation, including 50mm screed of the existing floor.

• Supply and install maximum 180m of 3/4C 600/1000V Waveform Cable from the POC to the new UKPN Brick Built substation

• Supply and install maximum 140m of 11kV 3C 185mm2 Al Triplex cable from the proposed POC to the new UKPN Brick Built substation.

• Project Management and Commissioning of electrical installation.

• Produce a complete set of electrical as built drawings and a safety handover file.

• Responsible for issuing the Integrated Test Plans (ITPs), Construction Management Plans, Quality Plans, Safety Management Plan and Temporary Works Register

• Daily toolbox talks, weekly progress and safety meetings, issue and risk management along with regular status reporting.

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