3results about "Calibrating/seeting protective devices" patented technology

The invention provides a circuit breaker contact system parameter adjusting method and device and electronic equipment, and relates to the technical field of circuit breakers, and the method comprises the steps: obtaining an arc contact opening range, a main contact opening range and a critical short-circuit current interval of a to-be-adjusted circuit breaker; calculating the ratio of the arc contact opening distance to the main contact opening distance to obtain a first ratio; the first proportion is adjusted in a first preset proportion interval, the to-be-adjusted circuit breaker performs a breaking test with the target short-circuit current as the short-circuit current according to the value of the first proportion, and the target proportion of the to-be-adjusted circuit breaker is determined according to the arcing time or breaking times obtained through the breaking test, the arc contact opening distance and the main contact opening distance of the to-be-adjusted circuit breaker are adjusted according to the target proportion; the first preset proportion interval is 1.2-1.4, and the target short-circuit current is any value in the critical short-circuit current interval. By adjusting the opening distance of the arc contact and the opening distance of the main contact, the breaking reliability of the circuit breaker in a rated short-circuit breaking current range is improved.

The invention relates to the field of power switches, and discloses a permanent magnetic mechanism, power distribution equipment and an adjusting method of the permanent magnetic mechanism, the permanent magnetic mechanism comprises a shell, a static iron core, a movable iron core, a magnetic assembly, an internal pull rod, a shaft fixing mechanism, a total travel adjusting assembly and an over travel adjusting assembly, the shaft fixing mechanism is fixedly connected with the movable iron core; the first end of the internal pull rod is connected with the shaft fixing mechanism through the axial through hole, and the second end penetrates through the axial center hole of the shell and extends out of the shell; the total stroke adjusting assembly is arranged at the first end of the internal pull rod and is configured to be used for adjusting the effective stroke of the internal pull rod so as to change the total stroke of the permanent magnetic mechanism. The overtravel adjusting assembly is connected to the second end of the internal pull rod and is configured to be independent of the total travel adjusting assembly to adjust the overtravel of the moving contact linked with the internal pull rod after the total travel is determined. The permanent magnet mechanism can adapt to different requirements of different scenes on the opening distance and the over travel, and the universality of the permanent magnet mechanism is improved.

This invention relates to an automated production equipment for miniature circuit breakers, belonging to the field of circuit breaker manufacturing technology. It includes a main body of equipment, with a connecting shaft rotatably connected to the outer wall of the main body. A processing turntable is fixedly connected to the top of the connecting shaft, and an assembly box is fixedly connected to the outer wall of the processing turntable. In this invention, when the vibration amplitude of the vibrating screen is adjusted by a variable frequency motor to meet the automatic feeding of parts of different sizes, the rotation of the first gear drives the suction fan, which delivers dry gas into the injection pipe and sprays it out through the nozzle. Under the action of a high-speed camera, the feeding trajectory of the parts in the feeding frame is automatically identified and corrected. Simultaneously, with the first gear rotating for an extended period, a temperature sensor automatically controls the opening and closing of the control valve, causing a graphene lubricating film to be sprayed from the lubrication nozzle, achieving a self-lubricating effect on the meshing parts of the gears and improving the accuracy of the circuit breaker assembly position.