80results about How to "Fast arc extinguishing" patented technology

The invention discloses an arc extinguish chute, an arc extinguish chamber and a breaker. The arc extinguish chute comprises a plate-like grid sheet main body. An installing part convenient for buckling or holding is arranged at one end of the grid sheet main body, and a plurality of arc strike parts for striking arc are formed on the other end of the grid sheet main body along the length direction, and at least one arc extinguish chute, which is protruded at the extension part of the grid sheet main body, is formed between the installing part and the arc strike part. Because the extension part is adopted, the arc chute, distances among the adjacent arc extinguish chutes are shortened so that arc extinguishing can be easily and fast. Therefore, different from the prior art, the arc extinguish chute only needs to shorten the distance between among the chutes so as to extinguish arc fast without sacrificing the distances among the chutes, thereby avoiding a congestion problem. Therefore, a congestion avoiding effect and a fast arc extinguishing effect can be achieved simultaneously.

Disclosed is a non-polarized low-voltage circuit breaker, relating to the technical field of electrical switches. The non-polarized low-voltage circuit breaker includes an operating mechanism, two static contact assemblies, a bridge type moving contact assembly and two arc extinguishing chambers. The bridge type moving contact assembly is arranged opposite to the static contact assemblies. The twostatic contact assemblies are input and output static contact assemblies. The bridge type moving contact assembly and the two static contact assemblies are cooperated to form a left moving and staticcontact fracture and a right moving and static contact fracture. The left and right moving and static contact fractures are closely adjacent to the matched arc extinguishing chambers. When a circuitis switched on and off, arc is formed between the left and right moving and static contact fractures and generated self-excited magnetic fields repel each other since the current directions of the arcare opposite to drive the arc at the left and right fractures to automatically enter the two arc extinguishing chambers to realize arc extinguishing. The circuit breaker has two switch fractures andtwo arc extinguishing chambers, the two switch fractures are connected in series, arc energy produced when the circuit is opened is born by the two fractures, and arc extinguishing is born by the twoarc extinguishing chambers, so that the circuit breaker is favorable for rapid arc extinguishing.

The invention discloses an active arc extinguishing method, which is used for arc extinguishing of a mechanical switch; a second power supply branch connected in parallel with the first power supply branch is provided for the load outside the first power supply branch composed of a power supply and a mechanical switch. power supply branch, and control the second power supply branch during the opening process of the mechanical switch: first, so that the current I in the first power supply branch at time t n =I n_ref In order to control the target, control the second power supply branch to inject current into the first power supply branch, t is the physical opening time or a certain time after that, the target current I n_ref The direction of the voltage of the power supply at time t is opposite to that of the power supply; then, the output voltage of the second power supply branch is controlled with the voltage phase at both ends of the load tracking the voltage phase at both ends of the load under the condition of power supply as the control target, and the output voltage of the second power supply branch is controlled for at least the duration time for one cycle of the power supply. The invention also discloses an active arc extinguishing device, a circuit breaker and an automatic transfer switch. The invention can realize the effect of rapid arc extinguishing.