5results about How to "Reliable breaking" patented technology

The invention provides a two-pole direct-current high-voltage molded case circuit breaker with a deionization arc-extinguishing device, and relates to the field of circuit breakers, the two-pole direct-current high-voltage molded case circuit breaker comprises a circuit breaker body and a top housing, the arc-extinguishing device is arranged in the circuit breaker body, the arc-extinguishing device is arranged in the top housing, an arc-extinguishing grid plate assembly is arranged in the arc-extinguishing device, and the arc-extinguishing grid plate assembly is arranged in the top housing. Arc extinguishing grid plate assemblies are arranged in the arc extinguishing devices, and cavities are formed between the arc extinguishing devices; the arc-extinguishing grid sheet assemblies comprise a first arc-extinguishing grid sheet assembly, a second arc-extinguishing grid sheet assembly and a third arc-extinguishing grid sheet assembly, the first arc-extinguishing grid sheet assembly is located above the second arc-extinguishing grid sheet assembly, and the third arc-extinguishing grid sheet assembly is arranged below the first arc-extinguishing grid sheet assembly and located behind the second arc-extinguishing grid sheet assembly. According to the circuit breaker, breaking is reliable, fierce flashover is avoided, the arc extinguishing and deionization effects of the circuit breaker are greatly improved, the binding posts can be prevented from being eroded and damaged by electric arcs, and the safety of the circuit is improved.

An arc-extinguishing device for a switch, belonging to the field of low-voltage electrical technology. It includes a magnetic assembly and an insulating cover. The magnetic assembly comprises a central permanent magnet, a pair of side permanent magnets disposed on either side of the central permanent magnet, and a back magnetic plate connecting the pair of side permanent magnets and the central permanent magnet. The insulating cover insulates and encloses the magnetic assembly, and forms a pair of arc-extinguishing channels extending along the movement direction of the switch's moving contact in the space corresponding to the central permanent magnet and the pair of side permanent magnets. The internal magnetic fields of the central permanent magnet and the side permanent magnets are opposite in direction but parallel to the movement plane of the moving contact, allowing the arc to enter one of the arc-extinguishing channels. Advantages: Reliable arc extinguishing in a small space, reliable interruption under high voltage, and reduced product size.

The utility model belongs to the technical field of low-voltage electric appliances, and discloses a circuit breaker. The circuit breaker comprises a lock catch mechanism, a static contact, a moving contact and a blocking piece. The moving contact is in transmission connection with the locking mechanism, and the locking mechanism is used for driving the moving contact to move along a first path and to be in contact with the static contact; the blocking piece is located on the first path and has elasticity, and when the moving contact moves along the first path, one end of the moving contact can extrude and cross the blocking piece, so that after the locking mechanism completes locking, the moving contact and the static contact are closed. According to the utility model, the contact between the moving contact and the static contact is delayed, so that the moving contact and the static contact are prevented from being closed in advance before the lock catch mechanism is completely locked, and the reliable breaking of the circuit breaker is ensured; in addition, the multi-phase moving contact is located at the consistent relative position before being in contact with the static contact, so that the situation that the consistency of multi-phase linkage of the circuit breaker becomes poor due to manufacturing or assembling errors is avoided.

The application relates to a bidirectional direct-current circuit breaker, a rated breaking method and a short-circuit breaking method, and belongs to the technical field of fault protection of a direct-current medium-high voltage power system. The bidirectional direct-current circuit breaker comprises a parallel main switch branch, a voltage-limiting energy-dissipating branch and a coupling commutation shutdown branch. The bidirectional direct-current circuit breaker provided by the application can realize breaking of different currents of the system under different operating conditions, such as a rated condition or a short-circuit condition, by controlling conduction of thyristors in the coupling commutation shutdown branch, only one set of pulse discharge circuit is used, current transfer and reliable shutdown of a large-capacity direct-current system under a high-current change rate short-circuit condition can be realized at the same time, and the bidirectional direct-current circuit breaker has the advantages of small size, strong breaking capacity, convenient control and reclosing function under a short-circuit fault condition.