Module for detecting an electrical fault for an electrical protection assembly and electrical protection assembly comprising such a detection module

A module for detecting an electrical fault for an electrical protection assembly, this detection module comprising:

• a housing;
• a first line conductor and a second line conductor, adapted to being connected to power supply lines;
• a first measurement toroid, positioned around the first line conductor and around the second line conductor, for measuring a differential current flowing between the first and second line conductors;
• a second measurement toroid, positioned around the first line conductor, for detecting an electric arc signal flowing through this conductor;
• an electromechanical tripping relay;
• an electronic processing circuit connected to the first and second measurement toroids and configured to switch the relay according to the current measured by the measurement toroids;
• said first and second measurement toroids are aligned with one another so that their respective longitudinal axes are parallel and offset by a distance of less than 10 mm, while the first measurement toroid takes the shape of an elongated tube and is adapted to, in the case of a differential fault between the first and second line conductors, generate a fault detection signal from induced currents generated by the electrical currents circulating in the conductors to trigger switching of the relay.