Grace's Guide To British Industrial History

Registered UK Charity (No. 115342)

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,919 pages of information and 233,587 images on early companies, their products and the people who designed and built them.

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,919 pages of information and 233,587 images on early companies, their products and the people who designed and built them.

Marcel Deprez

From Graces Guide

Marcel Deprez (December 12, 1843 – October 13, 1918) was a French electrical engineer. He was born in Aillant-sur-Milleron and died in Vincennes.

Born in Aillant-sur-Milleron in rural France and attended the School of Mines in Paris. He was not able to complete the course but he was employed as a secretary to the Director of the school, Charles Combes.

At Creil, from 1876 to 1886, Deprez conducted the first experiments to transmit electrical power over long distances. At the International Exposition of Electricity, Paris in 1881, Deprez undertook the task of presenting an electricity distribution system based on the long-distance transmission of direct current. The first successful attempt took place in 1882 from Miesbach to Munich at the occasion of the Exposition of Electricity in the Glaspalast organised by Oskar von Miller. There he transmitted 1.5 kW at 2kV over a distance of 35 miles.

Deprez conducted experiments in La Chapelle, Grenoble, Vizille, Paris, and Creil. He eventually attained transmission over thirty-five miles for industrial purposes.

In 1889, René Thury continued his approach of arranging generators in series, eventually developing commercial systems delivering 20 megawatts at 125 kV over 230 kilometres.

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