User:Lars Bache Nielsen/sandbox

Jacobsen Elektro AS (JEL) is a Norwegian company delivering equipment and services to the international electrical grid. JEL was established in 1987 to take over N. Jacobsens Elektriske Verksted (NJEV), that had serious problems caused by electric power market changes in Norway. It was decided to cancel the main factory production. JEL started power engineering and consulting on power-system protection. The main activities were at electric power transmission, electric power distribution and power stations in Europe, Africa and Asia.

History
Johannes Nicolai Jacobsen Established the electromechanical workshop N. Jacobsens Elektriske Verksted on 21 April 1891.

The first years NJEV developed telephone systems, fire alarm systems, x-ray machines, measuring instruments and batteries. The Illustrated Product Catalogue no. 1 contain most of the products produced at 1901.

In 1901 two prototypes to Kristian Birkelands coilgun were developed by NJEV. A large arcing failure during the gun test resulted in the Birkeland-Eyde process for production of nitrogen oxide and the start of Norsk Hydro.

The current limiter was made by NJEV from 1913 for most Norwegian households. If more than a few lamps were turned on, the light would be blinking to limit the power consumption. Later on the current limiters were replaced by electricity meters.

1923-1931 NJEV developed a crystal radio for the Norwegian market.

1931-1939 different versions of the "People Receiver" with Vacuum tubes and batteries was developed.

In 1933 NJEV startet the development of advanced protective relays that were used to trip electric power transmission lines by faults. During the following 80 years the technical solutions changed from electromechanical relays, to analogue electronics and ended as fully digital systems.

In 1985 JEL established a consulting department for planning and maintaining Power-system protection for Electric power systems.

Since 1993 JEL has changed the main activities to building Power stations like Ubungo II Thermal Power Station in Tanzania, and Electrical substations