Switching module to limit and/or break the current of an electric power line

摘要

601067 Disclosed is a device to limit and/or break an electrical current flowing through a power transmission or distribution line. The device includes at least one switching module (38a) comprised of at least one power semiconductor switching element (1), a gate unit (31), an energy storage capacitor (25) and a power transformation unit (20). The gate unit (31) is arranged to turn the at least one power semiconductor switching element (1) on and off according to a switching control signal. The energy storage capacitor (25) is arranged to provide power to a power supply input of the gate unit (31). The power transformation unit (20) is arranged to receive an optical power signal and to transform the optical power signal into an electrical power signal and to provide the electrical power signal to the energy storage capacitor (25). The switching module (38a) is arranged to separate from the optical power signal an electrical control signal and to provide the electrical control signal to the gate unit (31), wherein the electrical control signal comprises the switching control signal.