These items are made in accordance with VDE 0664, CEE27 and BS 4293 standards. They are suitable for use with circuits that are AC 50-60Hz, 220V single-phase, or 380V up to three-phase. They are versatile being suitable for use in industry, mining, construction, commercial properties and dwellings. Their primary functions are to prevent electrical fires, electric shock or leakage of electric wire netting. These ELCBs are current-operated, fast leakage protectors of a pure electromagnetic type, which means they can break faulty circuits rapidly and effectively, thus avoiding accidents.