33results about How to "Good for arc extinguishing" patented technology

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 relates to the technical field of circuit breakers and particularly relates to a current-limiting structure and a circuit breaker. The current-limiting structure comprises a variable resistor assembly, wherein one end of the variable resistor assembly is suitable for being electrically connected with a heating element in the circuit breaker, and the other end of the variable resistor assembly is electrically connected with a moving contact in the circuit breaker to be connected in series in a main loop of the circuit breaker; one end of the linkage mechanism is in linkage connection with the variable resistor assembly, and the other end is in linkage connection with the moving contact; the variable resistor assembly has a first state in which the resistance value tends to zero when the moving contact is connected with a static contact in the circuit breaker, and a second state in which the resistance value is increased under the repulsion driving force of the moving contact and the static contact when the current of the main loop is too large; in the first state, the variable resistor assembly does not limit the current of the main loop; in the second state, the linkage mechanism and the moving contact are linked to provide driving force, and the variable resistor assembly limits the current of the main loop. The arc voltage is improved, and arc extinguishing is facilitated. The structure is advantaged in that the arc extinguishing capability is improved without increasing the size and the opening distance of the arc extinguishing chamber, and the size of the product is reduced.

The invention discloses an arc control device which comprises shells made of insulating material and a plurality of grate sheets, wherein, each of the grate sheets is provided with two side arms, a slot matched with the side arms of the grate sheets is arranged on the inner walls of the shells, the two shells are respectively sheathed on the two side arms of the grate sheets, the back of the shells is opened, the shells are also internally provided with plug jacks connected with the slot, and the front end parts of the side arms are inserted into the plug jacks. As the two side arms of the grate sheets are respectively sheathed with a shell, and the front end parts of the side arms are inserted into the plug jacks of the shell, so that the arc control device plays good role of protection,and avoids the grate sheets being burnt and damaged by voltaic arc. Meanwhile, the gaseous substance emitted by the insulating shell is beneficial to arc extinction.

The invention discloses a non-polar hydrogen mixed gas DC (direct-current) arc extinction system for a DC contactor. The DC arc extinction system comprises a moving contact, four pairs of moving and static arc striking contacts, a static contact, a grid group and a permanent magnet. The non-polar hydrogen mixed gas DC arc extinction system is non-polar, namely the arc extinguishing property can not be influenced by the change of the current direction. According to the non-polar hydrogen mixed gas DC arc extinction system, the arc striking contacts strike electric arc to smoothly move along a track of the arc striking contacts, the arc striking contacts, the grid group and the permanent magnet are reasonably arranged, and the electric arc between the moving contact and the static contact is better and rapidly extinguished, thus the short circuit caused by sudden reversing of current is solved, and the breaking capacity is further improved. Hydrogen or a hydrogen mixed gas can be inflated into the non-polar hydrogen mixed gas DC arc extinction system for realizing arc extinguishing.

The invention discloses a microswitch with a heat dissipation structure. The microswitch comprises a bottom shell and a face cover, a wire inlet terminal, a wire outlet terminal and a button are arranged on the bottom shell, a connecting feeler lever is arranged inside the bottom shell, a resetting spring is arranged between the button and the inner wall of the bottom shell, clamps are arranged onthe inner wall of the bottom shell, a heat dissipation air-guiding pipe is arranged inside the bottom shell and fixed to the inner wall of the bottom shell through the clamps, a cavity with an opening in the side face is formed in the bottom shell, a bearing plate is arranged inside the cavity, a resetting tension spring is fixed between the end of the bearing plate and the end wall of the cavity, a round hole is formed in the side wall of the bottom shell, air outlet holes are evenly formed in the heat dissipation air-guiding pipe, a heat dissipation window is formed in the side wall of thebottom shell, and a small heat dissipation air blower is further arranged. The microswitch is reasonable in structural arrangement, the overall heat dissipation performance of the microswitch is greatly improved, arc extinguishing of the microswitch is easy, using stability is improved, the service life is prolonged, the application range is enlarged, and practicability is good.

This invention relates to one high voltage breaker linear motor operation structure, which belongs to transducer device technique field, which comprises linear motor and its servo controller, wherein, the linear motor secondary or high voltage breaker dynamic probe are connected through isolation pull bar; the linear motor is connected to speed sensor and servo controller through isolation pull bar.

The invention provides an arc extinguishing device for direct current breakers. An arc extinguish chamber is mounted on a second case body and is provided with a side opening which is opposite to a first case body; a gas generating cover is mounted at a lower part inside the arc extinguish chamber and comprises two gas generating plates which are oppositely arranged and a baffle plate; the baffle plate is opposite to the side opening and is arranged closely to the second case body; a moving contact and a fixed contact are mounted inside an installing space; the breaking position is inside a hold space and is close to the baffle plate; when arc is generated during the breaking of the moving contact and the fixed contact, the gas generating plate and the baffle plate are triggered by the arc, and large quantity of gas is generated to push the arc to move in a direction away from the baffle plate; one side, facing the hold space, of arc extinction chute plates installed at the upper side of the inside of the arc extinguish chamber is provided with a lower part opening; the lower part opening is tapering in the direction from the second case body to the first case body; the arc is blocked by the arc extinction chute plates with tapering lower part opening continuously during movement so that the arc cannot rush out from the side opening of the arc extinguish chamber but can only enter the space between the arc extinction chutes and be extinguished as soon as possible.

The invention discloses an arc extinguishing cover with protective parts for a dual-power supply automatic change-over switch. The arc extinguishing cover comprises a mounting frame, wherein the mounting frame is set into an N shape; the left side and the right side are vertical outer walls; the middle is connected with an inclined wall; arc extinguishing chambers are respectively arranged at two sides of the inclined wall; arc extinguishing plates are arranged in the arc extinguishing chambers; and the protective parts are arranged at arc inlets of the arc extinguishing plates. On one hand, the protective parts can effectively protect the arc inlets of the arc extinguishing chambers and the arc extinguishing plates at the arc inlets and reduce the damages to the arc inlets of the arc extinguishing chambers and the arc extinguishing plates at the arc inlets at high-temperature arc inlets; and on the other hand, the protective parts can generate hydrogen at arc-spraying high temperature; meanwhile, inner edges of the protective parts are set into an isosceles trapezoid with large arc inlets and large arc outlets; and the arc inlet speeds of the arc inlets of the arc extinguishing chambers are increased, so that arc extinguishing of the arc extinguishing cover is facilitated.

The invention provides a vacuum relay comprising a top cover and pedestal. A vacuum chamber containing a ceramic housing is disposed in the top cover. A movable contact, a static contact, and a driving shaft are arranged in the vacuum chamber. One end of the static contact is located in the vacuum chamber. The other end of the static contact passes through the vacuum chamber and the top cover to reach exterior. An arc-extinguishing mechanism is arranged around the movable contact and the static contact. A magnet is disposed on the outer side of the ceramic housing and magnetizes the arc-extinguishing mechanism through the ceramic housing in order that arc generated when the static contact and the movable contact are separated is released by the arc-extinguishing mechanism. Each of two arc-extinguishing grids of the arc-extinguishing mechanism includes more than one arc-extinguishing sheet. When one arc-extinguishing sheet is included, the arc can be elongated under the effect of magnetic field force in order to be easy to extinguish. When the arc-extinguishing grid include multiple arc-extinguishing sheets, long arc can be cut into a string of short arc so as to be easy to extinguish. An air exhaust bar is provided in order to further guarantee vacuum degree in the vacuum chamber, thereby enabling the arc to fast disappear and improving the continuous disconnected performance of a circuit.

The invention discloses an arc guiding and extinguishing apparatus, as well as a DC breaker using the arc guiding and extinguishing apparatus. The arc guiding and extinguishing apparatus comprises a U-shaped motor groove and an arc extinguishing cover component which are mutually connected, wherein a U-shaped magnet yoke is arranged in a hollow cavity of the U-shaped motor groove; a magnetic material block is respectively arranged on each side of the upper sides of two sidewalls of the magnet yoke; and a reversed U-shaped magnetic path is formed by the magnetic material blocks and an arc extinguishing grid sheet in the arc extinguishing cover component. The magnetism generated by the current in a conductive circuit in the U-shaped magnet yoke and the reversed U-shaped magnetic path has a strong magnetic blowing force on the arc which is instantly generated when a movable contact and a static contact are released from contact, so as to blow the arc into the arc extinguishing cover component to extinguish the arc. With the adoption of the arc guiding and extinguishing apparatus, as well as the DC breaker using the arc guiding and extinguishing apparatus, the problem that the arc guiding effect on the arc near to the dynamic contact by the arc guiding device in the prior art is poor is solved; and the arc guiding and extinguishing apparatus, as well as the DC breaker using the arc guiding and extinguishing apparatus is excellent in arc guiding effect, strong in arc extinguishing ability, short in arc spraying distance and wide in application range for all arcs between the dynamic contact and the static contact.

A large open-distance dual-power automatic transfer switch comprises an electromagnet drive mechanism, a lever transmission mechanism and a contact arc extinguishing mechanism, wherein the lever transmission mechanism comprises a transmission lever and an action arm, a fulcrum shaft is arranged in the middle of the transmission lever, a force end is provided with a force point groove, a resistanceend is provided with a blocking shaft, the action arm is set to an L shape, one end of the action arm is provided with a waist hole, and the other end is vertically fixed with a movable contact shaft. The common power transmission lever and the backup power transmission lever are oppositely disposed in the installation base plate by the lever cover, and the end of the movable contact shaft of theaction arm is sleeved on the installation base plate, and the waist hole on the action arm is sleeved in the blocking shaft of the resistance end of the transmission lever. Due to the special structure of the lever transmission mechanism, the rotation shaft equipped with the movable contact can obtain a rotation angle of 36 degrees, so that the opening distance of a dynamic contact and a static contact of the dual-power supply reaches 23mm, which is beneficial to the arc extinguishing of the contact arc extinguishing mechanism of the dual power, and improves the breaking and arc extinguishingcapability and working stability of the dual power.

The invention discloses a relay. The relay comprises an enclosure, a bottom plate and a driving device, wherein two static contacts are arranged on the enclosure and are isolated with each other, two contact parts are arranged on the bottom plate, are corresponding to the two static contacts and are spaced with each other for isolation, a cavity is formed in the bottom plate, a fuse is arranged in the cavity, the fuse is connected with the two contact parts so that the two contact parts are electrically connected, the bottom plate is movably arranged in the enclosure between a connection position and a disconnection position, the two contact parts and the two static contacts are respectively abutted to make the two static contacts connected when the bottom is at the connection positions, and the two contact parts are separated from the two static contacts to make the two static contacts disconnected when the bottom plate is the disconnection position. According to the relay disclosed by the embodiment of the invention, the effects of overload protection and short-circuit protection are achieved by the fuse, so that the safety of a circuit system with the relay is improved, and a fire caused by overcurrent or short circuit is prevented.