ELECTRIC ARC FURNACE COMPRISING A SAFETY DEVICE, AND A METHOD FOR PROTECTING PERIPHERAL DEVICES ON ELECTRIC ARC FURNACES
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United States of America Patent
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Jul 14, 2015
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Jul 15, 2014
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Abstract
An electric arc furnace has a safety device (3) connected to an earthed peripheral device. An earth cable (4) is provided to the peripheral device of the arc furnace (2). An ammeter (6) measures the current across the earth cable (4). A circuit breaker (8) in the earth cable (4) has a tripping time of less than 100 ms.
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