2results about How to "Improve electrical life" patented technology

The application relates to the technical field of circuit breakers, and discloses a small-sized DC circuit breaker which comprises a circuit breaker body, a static contact is arranged on the circuit breaker body, an operating mechanism is rotationally connected to the circuit breaker body, a dynamic contact is arranged on the operating mechanism, a first magnet and a second magnet are arranged on the circuit breaker body, the first magnet and the second magnet have the same magnetism, a first channel for separating the dynamic contact and the static contact is formed between the first magnet and the second magnet, and the first channel can repel an electric arc. The application can form a strong magnetic field region between the first magnet and the second magnet, a strong electric arc generated when the dynamic contact and the static contact are disconnected can be rapidly driven away from a contact gap, and the electric arc can be directionally stretched and cooled along the first channel, so that the electric arc can be effectively prevented from stagnating in the contact region, gathering energy and continuously burning, the degree of burning of a contact surface is reduced, the extinction efficiency of the electric arc is improved, and the breaking capacity, electrical life and working stability of the circuit breaker body are improved.

This invention discloses a rotary multi-contact isolating switch, comprising an operating part, a positioning part, a switching part, and a driving part. The operating part includes an upper housing, a handle, and a rotating shaft. The positioning part includes a positioning housing, a positioning gear, and a telescopic positioning assembly. The positioning gear is fixed to the bottom end of the rotating shaft, and the telescopic positioning assembly cooperates with the positioning gear to achieve position locking. The switching part includes a lower housing, a stationary contact, and a moving contact assembly, with the moving contact assembly slidably installed within the lower housing. The driving part includes a driven ring and a connecting shaft. The connecting shaft transmits the rotational motion of the rotating shaft to the driven ring, which drives the moving contact assembly to quickly disconnect from the stationary contact. This invention achieves accelerated disconnection of the moving and stationary contacts through the cooperation of the driven ring and the contact support block, effectively shortening the arcing time. The moving contact assembly adopts a double-spring structure, separating the contact pressure of the raised driven wheel from the contact pressure of the contact point, improving the contact stability and vibration resistance reliability during long-term operation. The overall structure is stable and highly reliable.