The modern steel plant receives low current, high voltage power from the generators of the electrical utility company. The purpose of the steel plant primary transformer is to step-down this voltage. The transformer thus provides high current, low voltage power for the EAF furnace. Large furnaces with transformers rated at 100MVA or higher is not uncommon.
There are usually two stages to this process. The transformer first steps-down the voltage from high to medium levels. There are different standards for a "medium-level voltage" in different countries; usually between 30 to 33 kV for Europe and Japan, but for the USA it is usually 34.5 kV. Finally, a heavy duty furnace transformer powers the EAF. This special furnace transformer is designed to allow the electric arc to operate within the desired current and voltage range.
To safeguard the EAF electrical system from the primary power supply are two types of switches: a vacuum switch and a motorized disconnect switch.......

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Title: Steel Plant Eaf Electrical System
Approximate Word Count: 413
Approximate Pages: 2 (250 words per double-spaced page)

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