We are approved as a contractor or have long term contracts with many prestigious companies.

including regional electricity companies such as Scottish and Southern Energy, SEC, Scottish Power, and EDF Energy Ltd, Thames Water Utilities, Engenica, Tate and Lyle Sugars, British Airways plc, BP Oil Refinery, and various MOD and NHS Trust sites.

Below are just a few of the many satisfied customers that Power Testing limited have worked with over the years.

Case Studies:

Thames Water Utilities

Provide and install a new wall mounted panel to house Transformer Pressure and Temperature (MVAA) relays relocated from 4 existing transformer feeder circuit breakers and current transducers relocated from all 6 existing circuit breakers, including all necessary panel wiring, terminals and labelling.

Alcatel Lucent / Banyard Hewitt

Following our request to carry out the new HV switchgear and cable installation at the Alcatel, Greenwich site listed is the requested scope of works with all additional requested solutions.

Capri Mechanical Service / E2V Technologies

11kV Switchgear feeding the two 11kV Oil Filled Transformers located at the E2V site Substation No.6 are to be replaced along with the two 800kVA 11kV/415V oil filled transformers. Also there is an additional cost for the supply and install of a new 8 way Schneider Electric Feeder Pillar. Included are the removal and disposal of the two transformers, oil filled switchgear and feeder pillar.

Coca Cola - Headquaters

Coca-Cola’s head office is based in Hammersmith in West London. The building’s electrical supplies are connected by mains cables fed by roof-mounted substations, which are housed in a fibreglass reinforced plastic (GRP) pod unit.

Britvic Soft Drinks

Power Testing Ltd were awarded a contract to upgrade the existing low voltage network that supplied the engineering workshop.Chelmsford Essex. New substation required a blast wall to protect glass-fronted building.

Citibank - Bahrain

Power Testing were contacted to resolve an issue that Citibank Bahrain were experiencing with spurious tripping. By discussing and identifying the problems our Client was facing we were able design a solution to meet their requirements and offer an alternative solution.

British Airways

Power Testing Ltd were employed to replace the existing LV infrastructure with a new low voltage distribution network, replacing a HV distribution system. The project value was £700k: working closely with Overbury PLC and the British Airways representative Power Testing Ltd successfully project managed and self delivered the upgrade of the Low voltage distribution network within technical block C, to time and budget minimising operational risks.

London Olympics 2012

Our electrical Distribution Network clients manage not only the regional and national networks that power major cities including London, but also the Private electrical Networks keeping the cities railways, airports and roads moving.

QinetiQ for Ministry Of Defence MoD

QinetiQ operates the Range at Shoeburyness on behalf of the MOD under what is known as the Long Term Partnering Agreement (LTPA). It provides defence Test and Evaluation (T & E), and training support services which help ensure the safety and effectiveness of munitions and skills used by the UK Armed Services.



We also support AMEC, Haden, Honeywell, Emcor, PFMS, Mitie and many other facilities management organisations and electrical contractors associated with large and small commercial clients.