Abstract: The present invention is an electrical switchgear unit in a case and including at least one stationary contact and at least one movable contact supported by a contact support shaft, an opening and/or closing mechanism of the movable contact(s) fitted in a support, the mechanism including a manual operating handle of the contact(s) rotatable around a toggle pin of the case, and a high-speed closing shaft designed to keep the movable contact(s) in the open position, at the beginning of manual closing of the handle and over a certain travel, by storing energy and to release the movable contact(s) after travel of the handle so that the stored energy causes high-speed closing of the contacts.

Abstract: The present invention relates to an electrical switchgear unit housed in a case and comprising at least one stationary contact and at least one movable contact supported by a contact support shaft, an opening and/or closing mechanism of the movable contact(s) fitted in a support, said mechanism comprising a manual operating handle of the contact(s) fitted rotating around a toggle pin of the case, and a shaft called high-speed closing shaft designed to keep the movable contact(s) in the open position, at the beginning of the manual closing operation of the handle and over a certain travel of the latter, by storing energy and to release the movable contact(s) after this travel of the handle so that the stored energy causes high-speed closing of the contacts.

Abstract: The current transformer comprises a magnetic circuit associated to a primary conductor and a secondary winding connected to a trip relay. The magnetic circuit comprises a mobile part and a fixed part. The mobile part goes from an open position to a closed position when a primary current flowing in the primary conductor exceeds a preset value. The change of position of the mobile part makes the magnetic flux in the magnetic circuit vary which induces a secondary current in the secondary winding to actuate the trip relay. Application, notably to trip devices and circuit breakers.

Abstract: The protection relay comprises a processing unit and temperature sensors associated to conductors, an ambient temperature sensor, and setting devices connected to circuits which perform tripping functions. A first short delay tripping circuit supplies a tripping order to a relay if a value of the temperature variation of a conductor exceeds a first setting threshold. A second long delay tripping circuit supplies a tripping order to the relay if a value of the temperature difference between the temperature of a conductor and the ambient temperature exceeds a second setting threshold. The protection relay is used notably for trip devices and circuit breakers.

Abstract: The trip device comprises a magnetic circuit having a first and second fixed parts, a movable element and an adjustment device. The adjustment device comprises a shunt and an air gap arranged between the first and second fixed parts branched off with respect to the mobile element. The tripping threshold of the trip device is modified by varying the air gap distance between the shunt and the second fixed part. In a circuit breaker, the mobile element acts on an opening mechanism and an adjustment part acts on the adjustment device making the air gap distance vary. A sensor associated to the magnetic circuit supplies a measurement signal to a processing unit.