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Lightning protection systems. Lightning can easily damage a number of different building materials, and the large electrical currents can cause fires within the interior or even side flashes. Side flashes are small explosions of highly pressurized, super-heated air that occur inside the nooks and crannies of structure materials.
With an automatic circuit breaker, the overload protection consists of two elements connected in series: a magnetic circuit breaker that protects against short circuits; a thermal circuit breaker that responds automatically to overload. The circuit breaker can simply be reset following an interruption.