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Lightning protection systems - What they do and don't do. A lightning protection system's only purpose is to ensure safety to a building and its occupants if lightning happens to hit it directly, a task accomplished by providing a good, safe path to ground for the lightning to follow.
Protection core. ï¶A protection core is designed to transform a distortion-free signal. even well into the overcurrent range. This enables the protective. relays to measure the fault current value accurately, even in very high. current conditions. ï¶Relays are required to perform in fault current type situations.