In 1900 the British Westinghouse Electrical & Manufacturing Co Ltd bought land in Trafford Park and built a factory which went into production in 1902 for the manufacture of mechanical and electrical equipment for the generation, transmission and use of electricity. In 1919, Trafford Park Works became owned by British Westinghouse’s successor, Metropolitan-Vickers Electrical Company (MV). The main shops, in common with factory construction throughout Trafford Park, were single floor type, with bays 1,000 feet in length, and had direct railway communication with the docks and trunk systems of the country. The main office block was a copy of the Westinghouse building in Pittsburgh, USA and the factory was to the American design and used imported steelwork for construction. Products manufactured at the Works included gas engines, stationary steam engines, electric generators, transformers, switchgear, meters, motors, control gear, and arc lamps. During the First World War, British Westinghouse built some small petrol-electric locomotives for the War Department Light Railways. In 1928 the Works were taken over by Associated Electrical Industries (AEI), which merged Metropolitan-Vickers and British Thomson-Houston, though these two companies continued their own trading names. Traction design and manufacture was always a minority of the workload at Trafford Park with the largest operations generally turbine manufacture. Very few vehicles were built there, and traction machines (i.e. motors, inductors and generators) were largely built in other places – notably at Sheffield or Rugby. Trafford Park traction manufacture was largely that of assembling control gear – contactors, switches, drivers’ controllers, camshaft controllers, relays etc. and building these into frames or equipment boxes for installation in vehicles made elsewhere. An important part of the Trafford Park Works site was the general switchgear operation, mainly for generation or distribution installations. The on-site Switchgear Testing Company was a “testing house” for these products and contributed to testing and development of traction circuit breakers and switchgear. During the Second World War MV acting for the Ministry of Aircraft Production produced more than a thousand Lancaster Bombers in the adjacent Mosley Road building. The company also manufactured war munitions and in the laboratories developed what became known as Radar. In 1959 the newly formed AEI Traction Division established its headquarters at Trafford Park, with a product range that included electric and diesel-electric locomotives; electrical equipment for tram-cars, trolley buses and trolley mining locomotives and traction motors. AEI was taken over by the General Electric Company (GEC) in 1967 whose Witton Works closed in 1969, with the design office and traction manufacture transferred to Trafford Park, as a result of the GEC reorganisation and mergers. GEC Traction Ltd took over the Works in 1972. In 1990 the former Low Voltage Switchgear site at Trafford Park (West Works) was renovated to be the new manufacturing facility for GEC Alsthom Traction, with an electronics workshop, machine shop and plating baths, and an assembly shop for switchgear, equipment cases and power modules. This building was vacated in 1998 when power modules and switchgear was moved to Tarbes in south west France. The Works housed the administrative, commercial and accounting functions, the majority of the design departments and the development section with its associated workshops and laboratories. The manufacturing area was devoted primarily to the production of components of traction control and railway signalling equipment. In 1993, as part of the rationalisation of the equipment group, it was announced that the headquarters of GEC Alsthom Traction would move to Preston, leaving only Power Module design and manufacture at Manchester, with the eventual closing of all activities at Trafford Park in 1998. The iconic original Westinghouse building was demolished and the site is now (2015) largely devoted to container handling and logistics operations.

In 1988 a joint-venture was formed between the General Electric Company (GEC) with Compagnie Générale d’Electricité (CGE) that led to the establishment of an Anglo-French company, GEC Alsthom in 1989. This company encompassed the Power Generation and Transmission, Rail Transport (25%) businesses from the constituent companies of GEC and CGE. The GEC Alsthom company headquarters were based at Rugby, Warwickshire and the headquarters for Transport were based at Trafford Park in Manchester. GEC Alsthom purchased train builder Metro-Cammell based at Washwood Heath, Birmingham from the Laird Group in 1989, bringing into the group a company which had a long association with GEC Traction and its predecessors as a vehicle builder. In 1998 GEC Alsthom was re-formed and became Alstom with Transport / Alstom Transport one of its major divisions.

Richard Bevan is a railway engineering consultant born on 13 March 1953 at Leigh, Lancashire. He was educated at Redruth Grammar School and then studied Physics with Electronics at Manchester University. After graduating in 1974 he worked at UMIST in the Control System Centre designing digital and analogue models for use in teaching post-graduate students the principles of advanced control techniques. In 1978 he moved to GEC Traction at Trafford Park to initiate the design of microprocessor electronic systems. The first application of a microprocessor by GEC was used to replace the conventional relay and contactor logic on two Class 6E1 locomotives for South African Railways (SAR). With the success of these locomotives, he directed a team of engineers in the design of a standard range of microprocessor control electronics for both ac and dc traction systems. These included the Class 90 and 91 locomotives and Class 319 multiple units for British rail, and the Class 10E1 locomotives for SAR. As a consequence of these contracts, GEC Traction was conferred with the Queen's Award for Technological Achievement in the field of electronic railway propulsion equipment in 1989. After the merger of GEC and Alsthom to form GEC Alsthom, he became Assistant Chief Engineer for the Systems Engineering Department in 1990 and embarked on the design of a train control and monitoring system (TCMS) for the 4000 series metro trains for Seoul. In 1995, after becoming the Design Cell Manager for the electronics production area in Trafford Park, he moved to Preston to join the standardisation team to aid production of the latest ac drive traction systems being supplied from the UK. In 1997 he moved into the tender engineering section, being responsible initially for the preliminary design on bidding projects in the USA and then the Far East. This enabled the first of many metro vehicle contracts for the French-Anglo company in China. Another notable success was the design for Melbourne Metro in Australia, which has resulted in many repeat orders. With a further change of company name to Alstom and the moving of the metro business to Belgium, Richard moved to Interfleet Technology in Derby as a Principal Engineer, and is currently working on various projects in the UK and abroad, including some for Alstom. He is still regularly contacted for advice relating to past projects at Alstom.