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Case Study: Arc-Flash Relays Help Plant Narrowly Escape Devastation

Just one week before experiencing an arc-flash incident, a manufacturer installed arc-flash relays that helped save $1 million plus worker injuries.

By Littelfuse, Inc.

Tim Deschamp from Evans Enterprises, Tulsa, Okla., was working with a customer to help it resolve an issue with an electrical hazard in its furnace control room. An earlier arc-flash analysis had determined that one 480V cabinet, which was fed from a 3,500 kVA transformer, exceeded an arc-flash Hazard Risk Category 4 (HRC). This meant that a worker wasn’t allowed to approach the cabinet if it was open. The door to the cabinet was therefore kept closed, and everything related to it was done remotely.

The problem was that the cabinet and the associated transformer were accessible to employees. Clearly, this was an unacceptable situation. Find out how he solved the problem by reading the full story from The Journal from Rockwell Automation and Our PartnerNetwork™ magazine …

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