A device for limiting disturbances of an electrical nature, such as currents induced by overvoltages caused by these disturbances, in particular electromagnetic, for example relating to events of lightning type in an electrical installation, including at least one protection apparatus of isolator or differential breaker type intended to protect at least one downstream electrical installation having at least one load and being powered between a neutral conductor and at least one phase conductor and including an earth link. A common-mode low-pass filter is connected in parallel between the neutral and each phase on one hand, and earth on the other hand.