Electrical protection device of circuit-breaker type which can be positioned on a continuous electrical cable

An electrical protection device of circuit-breaker type configured to equip an electrical cable, the electrical protection device comprising:

• a casing,
• a connection system configured to connect the casing and the electrical cable in operation, and
• a severing system, positioned in the casing, configured to assume an inactivated state and an activated state corresponding to an on state and an off state of the electrical protection device, respectively;
• wherein the connection system is configured to have an open state in which the connection system allows the electrical cable to be put in place and a closed state in which the connection system surrounds the electrical cable in operation, the connection system and the severing system being configured and arranged such that, when the connection system is in the closed state, the severing system severs the electrical cable when passing from the inactivated state to the activated state,
• wherein the severing system comprises a blade that is configured to move in a direction of displacement between a first position corresponding to the inactivated state and a second position corresponding to the activated state,
• wherein the connection system forms, in the closed state, a cylindrical tube that surrounds the electrical cable in operation, the blade being situated outside the tube in the first position and inside the tube in the second position, and,
• wherein the electrical protection device comprises at least one sealing system for isolating the blade from an environment outside a tube formed by the connection system in the closed state.