3results about How to "Reliable breaking" patented technology

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 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.