518results about "Circuit-breaking switch details" patented technology

The application discloses a quick closing operation mechanism of a circuit breaker, which comprises a shell, a handle, a static contact support, a movable contact support, a linkage and a tripping mechanism, the handle and the movable contact support are rotationally arranged in the shell, a contact torsional spring is arranged between the shell and the movable contact support, a long circular hole is arranged on the movable contact support, a pin shaft is arranged in the shell and passes through the long circular hole, and the movable contact support rotates relative to the pin shaft; an installation area is arranged in the shell, an energy storage limiting piece is slidably arranged in the installation area, a movable area is arranged on the handle, an abutting portion is arranged on the movable contact support, the energy storage limiting piece is provided with a moving portion and a matching portion which are arranged in the movable area, the application can make the movable contact support move beyond the stroke, is not limited to a fixed point, improves the contact force, and based on the energy storage limiting piece, the last action of closing is realized to store energy, the oxides between the movable contact and the static contact can be quickly broken down, and the overall closing effect is improved.

The utility model relates to a circuit breaker, which comprises a shell, an operating mechanism, a moving contact, a static contact and an arc extinguishing mechanism, the operating mechanism, the moving contact, the static contact and the arc extinguishing mechanism are arranged in the shell, the arc extinguishing mechanism comprises an arc extinguishing chamber, the arc extinguishing chamber comprises a first arc extinguishing grid plate group, and the first arc extinguishing grid plate group is composed of a plurality of first arc extinguishing grid plates. The first arc extinguishing grid sheets are arranged along the horizontal direction or are arranged at an included angle of-alpha-alpha relative to the horizontal direction; the arc extinguish chamber comprises a second arc extinguish grid sheet group which is composed of a plurality of second arc extinguish grid sheets and is arranged below the first arc extinguish grid sheet group, and the inlet end of the second arc extinguish grid sheet group is close to the moving track of the moving contact. The second arc-extinguishing grid sheets are obliquely arranged at an angle beta relative to the horizontal direction, and the outlet ends of the second arc-extinguishing grid sheets incline towards the outlet end direction of the first arc-extinguishing grid sheet group; alpha is smaller than 20 degrees, and beta is larger than 45 degrees and smaller than 90 degrees. And by optimizing the layout of the arc extinguishing grid sheets, a more effective arc extinguishing effect is realized.

The utility model discloses a high-voltage wire connector rapid switching circuit system based on a hot plug technology, which comprises a power supply module, a power supply switching module used for monitoring a power supply state of the power supply module and automatically changing a power supply mode, and a buffer module used for reducing switching influence, the power supply module is electrically connected with the power supply switching module and the buffer module; according to the utility model, the hot plug control circuit constructed by adopting a TPS2490 chip is matched with the slow start units R1-R6 and Q1-Q4 formed by connecting a plurality of MOS tubes in parallel and the hierarchical capacitor arrays C7-C12, so that dynamic impedance matching during plugging of the standby power supply is realized. The slope change of bus voltage is monitored in real time through the hot-plug voltage detection circuit, power supply switching over-transition is completed on the premise of keeping the continuity of load power, relay contacts are protected by arranging the buffer module, the switching efficiency is improved by reducing interference, and the reliability of power supply switching is improved. Compared with a traditional arc extinguishing mode, the switching influence can be reduced while the power is not influenced.

The invention relates to a universal circuit breaker energy absorption device, and the device comprises a housing which is of a hollow structure; the moving contact mechanism comprises a supporting seat, and the lower end of the supporting seat is rotatably arranged at the bottom of the inner side of the shell; the energy absorption structure is made of a high-temperature-resistant viscoelastic material and is arranged at the front end of the inner side of the shell; when the universal circuit breaker is switched off, the supporting seat rotates around the rotating axis at the lower end to a switching-off position, the front end of the supporting seat is in collision contact with the energy absorption structure, the energy absorption structure is made of a high-temperature-resistant viscoelastic material, friction and lag deformation are generated after the energy absorption structure is stressed, kinetic energy is converted into heat energy, and the energy absorption structure is in contact with the energy absorption structure. The collision kinetic energy between the supporting seat and the inner side of the shell is reduced, so that the resilience force converted from the collision kinetic energy is reduced, the resilience distance is obviously reduced after the supporting seat collides with the shell, and the possibility of electric arc reignition is greatly reduced.

The utility model relates to a tripping mechanism and circuit breaker relates to electrical switch technical field. The tripping mechanism includes support, lock catch spare and jump catch spare, support, lock catch spare and jump catch spare set up in the casing of circuit breaker respectively, support is connected with casing, lock catch spare, jump catch spare and the movable contact of circuit breaker rotation respectively, lock catch spare is used for with jump catch spare buckle, jump catch spare is connected with the handle transmission of circuit breaker, handle is driven through support, lock catch spare and jump catch spare common cooperation drive movable contact and the static contact of circuit breaker and open or close gate, wherein, the connecting line direction of the rotation connection point of support and casing and the rotation connection point of jump catch spare and support is first direction, the connecting line direction of the rotation connection point of support and casing and the rotation connection point of movable contact and support is second direction, the included angle between first direction and second direction is less than 90 DEG. The circuit breaker includes above-mentioned tripping mechanism. The tripping mechanism and circuit breaker can solve the problem that the volume of traditional circuit breaker is bigger.

The invention relates to an N-pole module assembly of a circuit breaker and the circuit breaker. The N-pole module assembly of the circuit breaker comprises a main body function module and a current detection module, and further comprises a first N-pole conductive plate fixedly integrated on the main body function module and a second N-pole conductive plate fixedly integrated on the current detection module, and the main body function module and the current detection module are respectively two independent modular structures. And the first N-pole current-conducting plate and the second N-pole current-conducting plate are fixedly and electrically connected to form an N-pole electric loop. According to the invention, the complicated bending and wiring process of the soft wire in the N-pole module assembly in the prior art is avoided, the assembly is convenient, and the automatic assembly can be realized. Moreover, through the special arrangement of the relative positions of the N-pole electric loop and the L-pole electric loop, the Lorentz force generated by the magnetic field generated by the current on the N-pole electric loop on the electric arc in the circuit breaker unit can assist the electric arc to be further pushed and lengthened, and the effect of enhancing the magnetic quenching function can be achieved.

The circuit breaker comprises a shell, an operating mechanism, a traction rod, a protection mechanism, at least one rotating shaft system, and a static contact and an arc extinguish chamber which respectively correspond to the rotating shaft system, the protection mechanism comprises at least one air blowing mechanism, the rotating shaft system, the static contact and the arc extinguish chamber are arranged at intervals in the width direction of the circuit breaker, the operating mechanism is located above the rotating shaft system, the arc extinguish chamber is located above the static contact, and the arc extinguish chamber is located on one side of the operating mechanism in the length direction of the circuit breaker. The draw bar is rotatably arranged on the other side of the operating mechanism, the length direction of the air blowing mechanism is arranged along the length direction of the circuit breaker, one end of the air blowing mechanism in the length direction is located between two adjacent arc extinguish chambers, and the other end of the air blowing mechanism in the length direction is arranged opposite to the draw bar; the sliding direction of the push rod of the air blowing mechanism is arranged along the length of the circuit breaker. According to the circuit breaker, the overall layout of the circuit breaker is compact and reasonable, the air blowing mechanism is horizontally arranged in the circuit breaker, and the breaking capacity of the circuit breaker is improved.

The present invention relates to an arc extinguishing unit of a molded case circuit breaker and, more specifically to an arc extinguishing unit of a molded case circuit breaker, having improved arc elongation performance. The arc extinguishing unit of a molded case circuit breaker, according to one embodiment of the present invention, comprises: a first side plate and a second side plate arranged to be spaced a predetermined distance apart from each other; a plurality of grids arranged by predetermined intervals between the first side plate and the second side plate; and an insulation member arranged to adjoin each of the plurality of grids.

The arc extinguishing system comprises an arc extinguishing chamber matched with a contact system, the arc extinguishing chamber comprises two arc extinguishing cavities which are communicated with each other, each arc extinguishing cavity is internally provided with at least one grid plate group, the contact system comprises a moving contact assembly and a static contact assembly which are matched with each other, the two arc extinguishing cavities are arranged at an included angle, and the two arc extinguishing cavities are arranged at the included angle. The static contact assembly is arranged at the joint of the two arc extinguishing cavities, the static contact assembly comprises a static arc striking angle, the opening and closing track of the moving contact assembly and one end of the static arc striking angle correspond to an arc inlet of one arc extinguishing cavity, and the other end of the static arc striking angle extends to the other arc extinguishing cavity. And the grid plate groups in the two arc extinguishing cavities are joined at the joint of the two arc extinguishing cavities. According to the utility model, the two arc extinguishing cavities are arranged at the included angle, so that the arc extinguishing grid sheets are additionally arranged in the arc extinguishing chamber in different directions, the breaking performance of high voltage and large current can be considered, and when the arc extinguishing chamber is arranged in the circuit breaker, the arc extinguishing chamber can be enlarged as much as possible in a limited space.

An arc extinguish chamber belongs to the technical field of low-voltage apparatuses. Comprising a pair of side plates and a plurality of grid sheets arranged between the pair of side plates, and the grid sheets are arranged at intervals; the LED lamp is characterized by further comprising a pair of partition plates made of insulating materials without glass fibers, and each partition plate is attached to the inner side of one side plate. The grid plate has the advantages that the side plates are prevented from being burnt by electric arcs, particles cannot be generated after the partition plate is burnt, and normal work of the grid plate cannot be affected.

The utility model relates to the field of low-voltage electrical technology of an electric power system, in particular to a static contact assembly and a molded case circuit breaker, a static contact body is composed of an inverted Z-shaped connecting part and an inverted U-shaped contact part, a static contact is arranged on the top end face of the contact part, an arc striking sheet is connected to the lower surface of the static contact body, and the arc striking sheet is connected to the lower surface of the static contact body. The arc striking piece is located at the front end of the static contact and used for pointing to arc striking of an arc extinguish chamber, and the magnetic increasing pieces are connected to the contact part and located on the two sides of the upper portion of the static contact, so that magnetic field distribution is facilitated, the electric repulsive force of a moving contact conducting rod can be greatly increased, the molded case circuit breaker can act faster and more reliably when overload or short circuit or other abnormal conditions happen, and the service life of the molded case circuit breaker is prolonged. Therefore, a better protection effect is provided, the breaking capacity of the molded case circuit breaker is improved, the magnetic increasing sheet is sleeved with the insulating part, current between different potentials is effectively isolated, eddy current is inhibited, electric leakage or short circuit is prevented, the safety of the molded case circuit breaker is improved, and the service life of the contact is prolonged.

The utility model discloses a circuit breaker with a metal particle adsorption function. The circuit breaker mainly solves the problem that gas containing metal particles of a conventional circuit breaker is directly exhausted from an exhaust hole, and certain potential safety hazards exist. One end of the arc striking sheet is arranged on the front side of the arc extinguish chamber, the middle section of the arc striking sheet extends to pass through the outer side of the bottom of the arc extinguish chamber, the tail end of the arc striking sheet extends into the air outlet channel and is provided with a through groove (31), and the through groove is communicated with the air outlet hole and the exhaust hole. According to the circuit breaker with the metal particle adsorption function provided by the utility model, metal particles are discharged after being shielded and adsorbed by the arc striking sheet, so that the circuit breaker is safer to use.

The utility model discloses an overvoltage protection type ozone generator which comprises a generator body, a first sliding rail is fixedly connected to the surface of the inner bottom of a base at the bottom of the generator body, a first sliding block is slidably connected to the surface of the first sliding rail, and a conductive insertion rod and a cross rod are fixedly connected to the surfaces of the left side and the right side of the first sliding block respectively. The far end of the cross rod is fixedly connected with an iron block, and a metal rod wound with a power supply line is arranged on one horizontal side of the iron block; according to the utility model, through the arrangement of the metal rod wound with the power supply line, when the voltage is instantaneously and abnormally increased and the current is sharply increased, the magnetism of the two ends of the metal rod is improved, and the iron block is attracted to separate the conductive insertion rod from the conductive insertion tube, so that the circuit is disconnected, and the equipment damage caused by overlarge voltage is avoided; according to the device, the response time is greatly shortened, and the safety and the practicability are improved.

In a current-limiting contact unit added to a circuit breaker, contact welding is suppressed when the device returns from current-limiting interruption. [Solution] The air damper 25 delays the operation of the movable contact 23, which has been opened by flow limiting and blocking, when it is closed again by a compression spring 24, and comprises a cylinder 31 and a piston 32. The cylinder 31 extends in the direction in which the movable contact 23 moves linearly, and is formed in a cylindrical shape with one end closed and the other end open. The piston 32 extends in the direction in which the movable contact 23 moves linearly, is fixed to the movable contact 23, has its tip side fitted into the cylinder 31, and its base end side is biased in the forward direction by a compression spring 24.

The utility model discloses an installation structure of a cover plate of an arc extinguish chamber of a circuit breaker, which comprises a shell, the shell is provided with a concave cavity used for installing arc extinguish grid sheets, the shell is fixedly provided with a cover plate which is matched with an opening of the concave cavity for closing, the cover plate is provided with a plurality of arc discharge holes, and the arrangement direction of the arc extinguish grid sheets corresponds to the direction of two ends of the cover plate. The two sides of the cover plate are provided with side edges, and the side edges and the shell are connected and fixed through fasteners. The arc-extinguishing grid plate is compact in structure, has higher fixing strength, is beneficial to increasing the installation number of the arc-extinguishing grid plates, and improves the bearing capacity of the circuit breaker.

The invention relates to the technical field of circuit breakers, and discloses a high-low voltage circuit breaker propelling mechanism which comprises a switching-off mechanism, a frame assembly is fixedly installed on the inner wall of the switching-off mechanism, a communication assembly is installed on the inner wall of the switching-off mechanism, and an operator pulls a spring reset rod to drive a radian stop block to move. Then a connecting rod is pushed to ascend to drive a balancing weight, a sliding rod, a spring ring and a connecting block to synchronously ascend, the connecting block ascends to push a moving contact on a moving contact supporting piece to be in contact with a static contact to enable current to be connected, when the current is large, a spring ejector rod downwards pushes an L-shaped plate to descend to enable a radian stop block to be separated from a fixing ring again, and at the moment, the connecting rod is pushed to ascend to drive the balancing weight, the sliding rod, the spring ring and the connecting block to synchronously ascend. The spring ring and the balancing weight return, and a larger initial driving force is provided by utilizing the elastic potential energy of the spring of the spring ring and the gravitational acceleration of the balancing weight, so that the moving contact supporting piece and the static contact can be quickly separated for a larger distance, the duration time of an electric arc is shortened, and the continuous combustion of the electric arc is effectively prevented.

The present invention is provided with: a fixed contact (24b); a movable contact (25b) that comes into contact with and separates from the fixed contact (24b) in accordance with the rotational movement of the rod-shaped movable contact (22b); and a metal grid (26b) disposed so as to face the fixed contact (24b) in a second direction that is orthogonal to a first direction, which is the movement direction of the movable contact (25b), and that is along the longitudinal direction of the movable contact (22b). The grid (26b) returns, to the periphery of the movable contact (25b) and the fixed contact (24b), an air flow that flows from the movable contact (25b) and the fixed contact (24b) toward the grid (26b) in the second direction, said air flow being generated between the movable contact (25b) and the fixed contact (24b) during a pole opening operation in which the fixed contact (24b) and the movable contact (25b) are separated from each other.

The utility model relates to the technical field of electrical connection devices, in particular to an arc extinguish chamber of a universal circuit breaker and the universal circuit breaker. The arc-extinguishing chamber comprises a first arc-isolating wall, a second arc-isolating wall, an arc-extinguishing grid group, an arc-extinguishing cover and a sealing structure. The sealing structure comprises a first sealing part and a second sealing part, and the first sealing part is arranged on the side, away from the second arc isolating wall, of the first arc isolating wall and located at the end, close to the cover plate, of the first arc isolating wall. The second sealing part is arranged on the side, away from the first arc-isolating wall, of the second arc-isolating wall and located at the end, close to the cover plate, of the second arc-isolating wall. The first sealing part is arranged on the outer side of the first arc isolation wall, and the second sealing part is arranged on the outer side of the second arc isolation wall, so that a gap between the arc extinguish chamber and the cavity wall at the opening of the arc extinguish chamber mounting cavity can be effectively blocked, electric arcs can be prevented from escaping from the gap at the opening, the safety of the universal circuit breaker is improved, and the service life of the universal circuit breaker is prolonged. And circuit faults are reduced.

The utility model provides an arc extinguish chamber and a circuit breaker, and belongs to the technical field of electrical equipment. The arc extinguish chamber provided by the utility model comprises a base, an arc extinguish grid plate and an arc extinguish cover. The base is provided with an arc extinguishing cavity, and a slot is arranged in the arc extinguishing cavity. And the arc extinguishing grid plates are positioned in the arc extinguishing cavity and are inserted into the slots. The arc extinguishing chamber is covered with the arc extinguishing chamber, and the arc extinguishing chamber is detachably connected with the base. According to the circuit breaker, the slots are formed in the arc extinguishing cavity, and when the arc extinguishing grid sheets are mounted in the arc extinguishing chamber, the arc extinguishing grid sheets can be inserted into the slots, so that the arc extinguishing grid sheets and the base are detachably connected, the difficulty of dismounting and replacing parts in the arc extinguishing chamber can be reduced, and the operation and maintenance cost of the circuit breaker is reduced. When the arc extinguishing chamber is detachably connected with the base, parts in the arc extinguishing chamber can be detached and replaced by taking down the arc extinguishing chamber from the base, so that the difficulty of detaching and replacing the parts in the arc extinguishing chamber can be further reduced.

A pulling and locking mechanism of a circuit breaker includes a housing of the circuit breaker, a handle mechanism rotatably assembled at an operating end of the housing, an operating mechanism and a locking mechanism arranged within the housing, the handle mechanism is in linkage with the operating mechanism to drive the circuit breaker to be opened and closed; wherein a cover plate is rotatably connected to the housing, and the cover plate is provided with an operating part and a second driving part; the cover plate rotates between a recovery position and an opening position; when the cover plate rotates to the recovery position, the operating part is close to an end surface of the operating end; and when the cover plate rotates to the opening position, the second driving part drives the locking mechanism to unlock, and the operating part moves away from the end surface of the operating end and is used for pulling the circuit breaker. According to the present invention, the cover plate that is capable of being folded is provided. When the circuit breaker is disassembled, the cover plate is opened, and the second driving part of the cover plate unlocks the locking mechanism at the same time. In addition, after the cover plate is opened, the operating part may exert a pulling force or cooperate with a disassembling tool to extract the circuit breaker. Compared with existing pulling through button mechanisms, the pulling and locking mechanism in the present invention has the advantages of simple structure, high stability and convenience in extraction.

The utility model relates to the technical field of cable switches, in particular to a cable short-circuit protection switch, which comprises a switch shell and a partition plate fixedly connected inside the switch shell, the partition plate divides the inside of the switch shell into a lower high-pressure bin and an upper normal-pressure bin, the high-pressure bin is filled with inert gas, and the normal-pressure bin is filled with inert gas. The internal air pressure of the high-pressure bin is higher than the external atmospheric pressure; the moving contact and the static contact are both installed in the high-voltage bin, the high-voltage bin is filled with inert gas, the inert gas is used for insulation, an electric arc area can be rapidly cooled, the electric arc temperature can be reduced, and therefore the electric arc can be rapidly extinguished, and the electric arc can be rapidly extinguished when the electric arc is generated when a switch is switched off due to short circuit of a cable and instant large current. And the cable and the switch are well protected. In addition, the air pressure in the high-voltage bin is slightly higher than the external atmospheric pressure, so that external air cannot enter the high-voltage bin, and the arc extinguishing function of the high-voltage bin is not affected even if some micro gas leaks.

The utility model discloses an internet switch with a fireproof arc breaking function, relates to the technical field of internet switches, and aims to solve the problems that a traditional internet switch has defects in the aspect of electrical safety protection, and particularly, a combustion risk is easy to occur under the condition that a circuit is overheated, so that potential safety hazards are caused. The device comprises a device body, a switch arc breaking mechanism and a fireproof mechanism, the upper end of the device body is provided with the switch arc breaking mechanism, and the lower end of the device body is provided with the fireproof mechanism; a bimetallic strip is arranged in the fireproof mechanism, when the temperature rises, the bimetallic strip is bent to drive the plug-in to move, and the circuit is disconnected; meanwhile, an elastic piece is arranged and used for resetting the plug-in when the bimetallic strip recovers the shape, so that the circuit is reconnected; according to the utility model, automatic disconnection and recovery of the circuit are realized through the thermal deformation characteristic of the bimetallic strip, fire hazards caused by overheating are effectively prevented, the safety and stability of the circuit are improved, and the circuit is suitable for various circuit control places requiring safety protection.

The application belongs to the technical field of switches, and particularly relates to a circuit breaker or disconnector, which increases a backflow channel structure on the side wall of an arc extinguishing chamber, after the circuit breaker or disconnector arcs, the arc moves upwards, the pressure above the arc extinguishing chamber increases, the pressure in the middle region of the moving and static contacts below the arc decreases, the backflow channel is used to supplement the gas in the space behind the arc with the cold gas above, the arc is inhibited from falling back, and the arc extinguishing performance of the product is improved.

The utility model relates to a zero flying arc arc extinguishing chamber structure of circuit breaker, a zero flying arc arc extinguishing chamber structure of circuit breaker, including the casing formed by the upper cover, middle cover and base screw connection, install arc extinguishing chamber in the base, the upper and lower both ends of middle cover are equipped with corresponding several wiring terminals, the arc extinguishing chamber includes contact head support, the arc extinguishing grid piece of several connected in the both sides of contact head support and the peripheral baffle connected in the end of arc extinguishing grid piece, the peripheral baffle is equipped with the air outlet matched with the position of arc extinguishing grid piece, the base still is equipped with the baffle groove and the arc baffle of interference connection in baffle groove, the position of arc baffle corresponds with air outlet, is equipped with several through -holes on this arc baffle, the through -hole array forms the net -like structure, has realized arc baffle alignment air outlet, the arc baffle on the physical isolation blocks arc extinguishing chamber and does not completely extinguish the arc, the through -hole on arc baffle further separates arc, accelerates the remaining arc to extinguish, avoids the short circuit of circuit breaker because of the arc that sprays.

The utility model belongs to the field of circuit breakers, and particularly relates to an arc extinguishing system of a universal circuit breaker, which comprises a shell, an arc extinguishing chamber, a deionization assembly and an arc striking sheet, the arc extinguishing chamber comprises two flash barriers and a plurality of arc extinguishing grid sheets, and an arc extinguishing channel is formed between the arc extinguishing grid sheets. Two gas production plates are arranged at the positions, corresponding to the gas inlet of the arc extinguishing chamber, of the inner walls of the two flash barriers, a gas production channel communicated with the arc extinguishing channel is formed between the two gas production plates, and a lower gas blocking piece arranged between the conductive copper bar of the moving contact and the static contact in a separated mode is arranged in the containing cavity of the shell. The moving contact is provided with an upper gas blocking member separated between the lower gas blocking member and the conductive copper bar in a linkage manner, and the two gas generating plates generate gas under the action of high temperature of the arc, so that the arc extinguishing chamber is pressurized to form a gas-blowing effect, the arc can quickly enter the arc extinguishing chamber, the arc can be quickly extinguished, and the service life of the arc extinguishing chamber is prolonged. The upper gas blocking piece and the lower gas blocking piece can block gas from overflowing towards the back of the moving contact, so that the arc is effectively prevented from breaking down internal elements of the circuit breaker.

Disclosed is an arc gas discharge device of an air circuit breaker, capable of preventing damage to an arc extinguishing chamber caused by a sudden rise in pressure. The arc gas discharge device of an air circuit breaker, according to one embodiment of the present disclosure, comprises: a base having an arc extinguishing space in which an arc, generated by means of the operation of a movable contact with respect to a stationary contact, rises and is extinguished; an arc extinguishing unit which is provided in the arc extinguishing space of the base, and which has a the plurality of gridss so that the arc is extinguished and is exhausted through the top thereof; a guide member which is provided in the base and has a part thereof that restricts and guides the arc extinguishing unit so that the arc extinguishing unit can be slightly elevated in the arc extinguishing space; and an elastic member for providing elastic force so that the arc extinguishing unit comes in close contact with the base in the arc extinguishing space, wherein, if an arc gas exceeds a certain pressure, the extinguishing unit rises while overcoming the elastic force of the elastic member, and an exhaust passage is open between the arc extinguishing unit and the base so that the arc gas can be exhausted.

Electric arc extinction chamber for an electrical protection device and an electrical protection device comprising at least one such extinction chamber. The present invention relates to an electric arc extinction chamber comprising juxtaposed metal separation plates (1) spaced apart from each other and at least two flanges (2) arranged on either side of the plates so as to hold them in position. It further comprises at least one reinforcing part (3) arranged on the inner face (2a) of each flange (2) extending along the juxtaposed metal separation plates, each lateral side (1a) of the separation plates comprising at least one notch (10a) provided with at least one retaining element (100a) projecting out of the notch (10a), each reinforcing part being inserted into the notches and the retaining elements passing through the reinforcing part and the flange so as to reinforce the maintenance of the spacing between the plates. It also relates to an electrical protection device comprising at least one such extinction chamber.

The invention relates to the technical field of low-voltage switching devices, in particular to an arc extinguishing device and a circuit breaker. The arc extinguishing device provided by the invention comprises a contact system, an arc extinguishing chamber and an arc running piece, the arc extinguish chamber comprises a plurality of grid sheets, and all the grid sheets are sequentially arranged at intervals to form a grid sheet group; the arc running piece is arranged on one side of the notch of the grid piece group along the arrangement direction of the grid pieces, and the arc running piece is electrically connected with the contact system; at least one bending part is arranged on the arc running piece in the arc running direction of the arc running piece, the bending part protrudes towards the notch side of the grid piece set, and the bending part and the grid pieces form breakdown points. The arc running piece is provided with at least one bending part along the arc running direction, the bending part protrudes towards one side of the notch of the grid piece group and is matched with the grid piece in the arc extinguish chamber to form a breakdown point, an electric arc is guided to be broken down and transferred towards the end part on the arc running piece through the breakdown point, and repeated advance and retreat are avoided, so that the arc voltage can be pulled up more quickly, and the product performance is improved.

The utility model relates to the technical field of electrical switch equipment, in particular to a high-efficiency arc extinguishing chamber, which comprises a fixed plate, arc extinguishing grid plates and a slit assembly, the number of the fixing plates is two, and the two fixing plates are oppositely arranged. The arc-extinguishing grid plate is arranged between the two fixing plates and is composed of a first arc-extinguishing grid plate group, a second arc-extinguishing grid plate group and a third arc-extinguishing grid plate group which are arranged in an L shape and are connected in sequence; the slit assembly is composed of two gas generating plates and is arranged at the concave positions among the first arc extinguishing grid piece set, the second arc extinguishing grid piece set and the third arc extinguishing grid piece set, and the two gas generating plates are arranged at a certain interval to form a slit space for a moving contact to stretch in. According to the arc extinguish chamber, the arc extinguish efficiency is effectively improved through the unique arc extinguish grid sheet layout and the slit assembly design. And the L-shaped arc extinguishing grid sheet group is compact in layout, so that the arc can be better guided, and the arc extinguishing effect is enhanced.

To provide a cutout gear capable of improving the extinguishing of the arc.SOLUTION: A cutout gear 1 includes: a conductor 2, a housing 9, and a cooling body 3. The conductor 2 is connected to an external electric circuit. The housing 9 has an interior space 90. The interior space 90 accommodates at least a part of the conductor 2. The cooling body 3 is arranged in the interior space 90. The cooling body 3 cools the arc generated in the interior space 90. The cooling body 3 has a porous body 30 consisting of at least one of metal oxides or inorganic oxides.SELECTED DRAWING: Figure 1