Charles Hesterman Merz
Charles Hesterman Merz (5 October 1874 – 14 or 15 October 1940) was a British electrical engineer who pioneered the use of high-voltage three-phase AC power distribution in the United Kingdom, building a system in the North East of England in the early 20th century that became the model for the country's National Grid.
Merz was the eldest son of industrial chemist John Theodore Merz (a Quaker from Germany) and Alice Mary Richardson, the sister of John Wigham Richardson the Tyneside ship builder. He was born in Newcastle upon Tyne and attended Bootham School, York. He attended Armstrong College in Newcastle, where his father was a part-time lecturer.
He then entered an apprenticeship at the Newcastle Electric Supply Company (NESCo), which had been founded by his father, in 1889. In 1898 Merz became the first Secretary and Chief Engineer of the Cork Electric Tramways and Lighting Company in Cork, Ireland. In 1899 Merz set up a consulting firm which, with the arrival of William McLellan in 1902, became Merz & McLellan. Merz and McLellan had first worked together in Cork. His next major project was the Neptune Bank Power Station in Wallsend near Newcastle. It was the first three-phase electricity supply system in Great Britain, and was opened by Lord Kelvin on 18 June 1901. In the same year he toured the USA and Canada. Together with Bernard Price, he developed and patented one of the earliest forms of automatic mains protection. This system was successful and became known as the Merz-Price system. When Price was succeeded by Philip Vassar Hunter, Merz worked with him to develop an improved version which became known as the Merz-Hunter system. He was known affectionately within the electricity industry as the "Grid King".
He was a consultant to a local tramway company on the electrification of their horse-drawn routes and, subsequently, to the Tyneside local lines of the North Eastern Railway, a pioneer of British mainline railway electrification, whose electric systems were turned on in 1904. As well passenger commuter lines, these included a 0.75 mi (1.21 km) freight line using the ES1 electric locomotive.
In 1905 he first attempted to influence Parliament to unify the variety of voltages and frequencies in the country's electricity supply industry, but it was not until World War I that Parliament began to take this idea seriously, then appointing him head of a Parliamentary Committee to address the problem. In the same war he was appointed Director of Experiments and Research on the Board of Invention and Research  an appointment that led to his nationality being questioned in the House of Commons.
From 1912 to 1915 he was Vice-President of the Institute of Electrical Engineers.
In 1916 Merz pointed out that the UK could use its small size to its advantage, by creating a dense distribution grid to feed its industries efficiently. His findings led to the Williamson Report of 1918, which in turn created the Electricity Supply Bill of 1919. The bill was the first step towards an integrated system. He also sat on the Weir Committee, which produced the more significant Electricity (Supply) Act of 1926, leading to the setting up of the National Grid.
Merz's own system ran at 40 hertz, 20,000 volts, but he was forced to convert it to 50 hertz to match the European system.
Merz received the Faraday Medal in 1931, was awarded an honorary D.Sc by the University of Durham in 1932, was a Member of the Institution of Civil Engineers and Fellow of the American Institution of Electrical Engineers.
In 1940 Merz designed the electric drive equipment for the TOG 1 tank. In the same year, aged 66, he was killed during an air raid, with his two children, at their house at 14 Melbury Road, Kensington, London, by a German bomb.
The Faculty of Engineering at the University of Cambridge manages a Charles Hesterman Merz Fund.
The School of Electrical and Electronic Engineering at the University of Newcastle upon Tyne is located in a building named Merz Court.
- Children of Light: How Electricity Changed Britain Forever Gavin Weightman ISBN 1848871171
- Bootham School Register. York, England: BOSA. 2011.
- Oxford Dictionary of National Biography
- Tram Tracks Through Cork, Walter McGrath, Tower Books, Cork, 1981
- Price Patent
- Robert Monro Black (January 1983). The History of Electric Wires and Cables. IET. pp. 101–. ISBN 978-0-86341-001-7.
- Earl Jellicoe (15 September 2010). The Crisis of the Naval War. pubOne info LLC. ISBN 978-2-8199-0022-1.
- Who Was Who, 1929–1940. A and C Black. 1947. p. 934.
-  CWGC Casualty Record, Metropolitan Borough of Kensington. His age is given as 65 although he had passed his 66th birthday up to ten days earlier.
- "The Second Industrial Revolution" on Making the Modern World
- Managing Change – Regional Power Systems, 1910–1930, Thomas Parke Hughes, University of Pennsylvania (PDF) – detailed essay on Metz's contribution to the UK electric supply industry
- Harold Winthrop Clapp and the Melbourne Railway
- John H. Lienhard (2000). "The Age of the Earth". The Engines of Our Ingenuity. Episode 1568http://www.uh.edu/engines/epi1568.htm
|transcripturl=missing title (help). NPR. KUHF-FM Houston. (transcript page contains photo of Merz with George Westinghouse and Lord Kelvin)
- Charles Merz – Lessons from Boston, IEE Archives
- Cambridge fund
- Sinclair Knight Merz – Celebrating 40 years
- Paxman History Pages (TOG 1 tank)
- R. A. S. Redmayne, Merz, Charles Hesterman (1874–1940), rev. Albert Snow, Oxford Dictionary of National Biography, Oxford University Press, 2004, accessed 11 January 2006
- Newcastle University (UK) Electrical Engineering Building named after Charles Merz