Patent EA-001567-B1 (EA)
Title: Electrical breaking device comprising a differential trip device and a circuit breaker comprising such a device
Inventor: LAZARETH MICHEL
IPC: H01H71/24
Filed: 1999-06-03
Abstract: 1. An electrical breaking device comprising, located in a single narrow case, one appreciably in the extension of the other in a plane appreciably parallel to the large side panels of the case, an electromagnetic trip device designed to act on a trip part to command a trip device so as to bring about separation of the stationary and movable contacts when a sudden current increase occurs and a differential trip device designed to act on the above-mentioned trip part to command the trip device so as to bring about separation of the contacts when an insulation fault occurs in the installation, said differential trip device comprising an actuating means designed to move an actuating rod between a rest position and a position actuating the trip part, characterized in that the trip rod (19) is located outside the electromagnetic trip device (7) and acts directly on the above-mentioned trip part (20) when a differential fault occurs. 2. The device according to claim 1, characterized in that this trip rod (19) performs resetting of the actuating means (16) after opening of the contacts (3, 4). 3. The device according to claim 2, characterized in that the above-mentioned trip rod (19) comprises a nose (21) designed to operate in conjunction with the trip device D in such a way that actuation of the trip device D results in resetting of the differential actuating means (16) after opening of the contacts (3, 4). 4. The device according to claim 3, characterized in that the trip device D comprising a latching system (22) keeping the movable contact (4) in the closed position by means of a rotary plate (23) secured in rotation to the movable contact (4), and unlatching of the latching system (22) due to the effect of actuation of the trip part (20) resulting in rotation of the plate (23) in one direction and separation of the contacts, the above-mentioned nose (21) operates in conjunction with the plate (23) so that rotation of the plate (23) during tripping leads to resetting of the differential actuating means (16). 5. The device according to any one of the claims 1 to 4, characterized in that the actuating means (16) is designed to drive the trip rod (19) in translation parallel to its longitudinal axis between a rest position and a position actuating the trip part (20). 6. The device according to any one of the foregoing claims, characterized in that the device comprising a manual control handle (6) of the contacts, the trip rod (19) extends between the handle (6) and the magnetic trip device (7). 7. The device according to any one of the foregoing claims, characterized in that the magnetic trip device (7) comprising a striking rod (12) operating in conjunction with a coil (10), the trip rod (19) comprises a straight part (19a) forming an angle a of about 10 degree  with the axis of the striking rod (12) and a curved end part (19b) curved appreciably at right angles, in the direction of the end of the striking rod (12), said curved part (19b) operating in conjunction with the trip part (20). 8. The device according to any one of the foregoing claims, characterized in that the actuating means is a magnetic latching relay (16). 9. The device according to any one of the foregoing claims, characterized in that it comprises in addition a test circuit with a test button, said test button being situated under the handle (6) and acting on a spring element situated laterally to the rod, said spring element connecting a test resistor (17a) incorporated in the electronic circuit of the differential function to the potential of the shell of the coil (10). 10. A circuit breaker comprising a breaking device according to any one of the foregoing claims. 11. The circuit breaker according to claim 10, characterized in that the trip part (20) is a trip bar.