Electrical Power System Essentials by Pieter Schavemaker & Lou van der Sluis

Author:Pieter Schavemaker & Lou van der Sluis [Schavemaker, Pieter]
Language: eng
Format: azw3
ISBN: 9781118803462
Publisher: Wiley
Published: 2017-05-08T04:00:00+00:00

4.2.3 Heat

Electricity is also used for heating: the electric power is converted into heat by a resistor. We find this conversion very often in our houses: in heaters to warm parts of the house, in water cookers and in boilers for warm water, in the stove, and so on. The aluminum- and steelmaking industry applies electric heating on a large scale as well as for their electric arc furnaces. A midsized steelmaking furnace has an electrical rating of 60 MVA. It is in fact a transformer with a secondary voltage of about 800 V and, in the case of a 60 MVA rating, a secondary current of 44000 A. The melted metal short-circuits the secondary winding and the current heats up the furnace.

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