Patent ID: 8264232

Claim:
An electrical protection switchgear device comprising at least one pole-unit wherein each pole-unit comprises: a pair of main contacts that are movable with respect to one another between an open position and a closed position; a support arm of a first main contact comprising a first part supporting the first main contact and a second part, the two parts sliding with respect to one another so that, in the closed position of the pair of main contacts, the second part can take a first abutment position and a second end-of-travel position in which the first part is depressed into the second part; a drive mechanism of the support arm comprising a rotary shaft and at least one connecting rod system which couples the latter pivotally to the second part of the support arm; and wherein the electrical protection switchgear device comprises a device for determining the integrity of the main contacts, said device being suitable for measuring the angle of rotation of the rotary shaft between the first abutment position and the second end-of-travel position.