A study on the development of AC and DC short-circuit test facility for the low-voltage protective equipment

Recently, supply of new energy system such as photovoltaics and information technology equipment are being increased therefore, the importance on Direct Current (DC) protective equipment has also increased. In protective equipment, short-circuit performance is very important. But, due to lack of test facilities, verification of short-circuit performance for protective equipment to be used in DC system is very difficult. This paper proposes the development of AC and DC short-circuit test facility for the low-voltage protective equipment with a method to modify the existing test facility, which uses a power frequency voltage.