An electrical protection device, comprising - a casing, - a first conducting path, comprising a first input terminal, a first output terminal and a first movable contact, which is movable relative to the casing, between: • a conducting position (Fig. 3), in which the first movable contact electrically connects the first input terminal to the first output terminal, and • an isolating position (Fig. 6), in which the first input terminal and the first output terminal are electrically isolated from each other; - a switching mechanism, which is housed in the casing and is configured to switch between: • a set configuration, in which the switching mechanism places the first contact in the conducting position, and • a tripped configuration, in which the switching mechanism places the first contact in the isolating position; - a trip device, which is configured to switch the switching mechanism to the tripped configuration when the trip device is excited by an electrical fault of a predetermined type; characterised in that the electrical protection device further comprises: - a spool which is movable relative to the casing between a set position (Fig. 3) and a tripped position, in which the spool causes the switching mechanism to switch to the tripped configuration, - a spool spring, which applies a release force to the spool, resting on the casing, the release force tending to move the spool from the set position to the tripped position, and - a latch, which is movable between a locked position, in which the latch holds the spool in the set position, and an unlocked position, in which the latch allows the spool to be moved from the set position to the tripped position, and in that the trip device is configured to move the latch from its locked position to its unlocked position when the trip device is energised. - a casing, - a first conducting path, comprising a first input terminal, a first output terminal and a first movable contact, which is movable relative to the casing, between: • a conducting position (Fig. 3), in which the first movable contact electrically connects the first input terminal to the first output terminal, and • an isolating position (Fig. 6), in which the first input terminal and the first output terminal are electrically isolated from each other; • a conducting position (Fig. 3), in which the first movable contact electrically connects the first input terminal to the first output terminal, and • an isolating position (Fig. 6), in which the first input terminal and the first output terminal are electrically isolated from each other; - a switching mechanism, which is housed in the casing and is configured to switch between: • a set configuration, in which the switching mechanism places the first contact in the conducting position, and • a tripped configuration, in which the switching mechanism places the first contact in the isolating position; • a set configuration, in which the switching mechanism places the first contact in the conducting position, and • a tripped configuration, in which the switching mechanism places the first contact in the isolating position; - a trip device, which is configured to switch the switching mechanism to the tripped configuration when the trip device is excited by an electrical fault of a predetermined type; - a spool which is movable relative to the casing between a set position (Fig. 3) and a tripped position, in which the spool causes the switching mechanism to switch to the tripped configuration, - a spool spring, which applies a release force to the spool, resting on the casing, the release force tending to move the spool from the set position to the tripped position, and - a latch, which is movable between a locked position, in which the latch holds the spool in the set position, and an unlocked position, in which the latch allows the spool to be moved from the set position to the tripped position,