Arc flash relays are an effective defense against dangerous arc flash events, and the decision to include such a relay in a design is an easy one. Selecting the right relay for your application can be challenging. According to OSHA, industrial arc flash events cause approximately 80 percent of electrically-related accidents and fatalities among qualified electrical workers. Even if personnel injuries are avoided, arc flash can destroy equipment, resulting in costly replacement and downtime. In response, many designers are adding arc flash relays to electrical systems.