100results about How to "Improve arc extinguishing performance" patented technology

The invention relates to a disconnecting switch and a high breaking arc extinguish chamber with surrounding type grid pieces arranged in a staggered mode, the high breaking arc extinguish chamber comprises a first arc extinguish grid piece set and a second arc extinguish grid piece set which are the same in structure and an arc extinguish chamber framework, and grid piece clamping grooves are formed in the two sides of the arc extinguish chamber framework. The first arc-extinguishing grid sheet group and the second arc-extinguishing grid sheet group are respectively arranged on two sides of the arc-extinguishing chamber framework through grid sheet clamping grooves, and each of the first arc-extinguishing grid sheet group and the second arc-extinguishing grid sheet group comprises a plurality of grid sheets which are arranged longitudinally, a plurality of grid sheets which are arranged transversely, and connecting grid sheets which are used for connecting the longitudinal grid sheets and the transverse grid sheets; and the longitudinal grid sheets and the transverse grid sheets arranged on the arc extinguishing grid sheet group are respectively and correspondingly arranged in a staggered manner. Compared with a conventional layout, the number of the arc extinguishing grid sheets is greatly increased under the condition that the occupied space is not changed, so that the arc extinguishing performance under the unit volume is enhanced, and the safety, the stability and the switching-on and switching-off capability are improved.

The invention relates to a contactor arc extinguish chamber design with an arc-shaped grid sheet structure. The arc extinguishing structure comprises a group of arc-shaped grid sheets arranged in the arc extinguishing chamber and used for lengthening an arc path when an arc is generated and gradually decomposing and cooling the arc through the segmentation effect of the grid sheets so as to accelerate the extinguishing of the arc. The grid sheets are arranged in an arc shape, can effectively guide the arc to expand along the arc direction, prevents the arc from being concentrated at a single point, and reduces the local energy density of the arc. In addition, the arc design can be matched with the magnetic blow-out effect of the permanent magnet, the moving distance of the arc is further increased, and the arc extinguishing efficiency is improved. The arc-shaped grid sheet structure is suitable for high-voltage and large-current direct-current contactors and has the advantages of being simple in structure, good in arc extinguishing effect and high in durability.

The invention discloses a multi-pitch electrode dynamic strengthening liquid-electric effect arc extinguishing structure and method, and the structure comprises a lower arc extinguishing device and an upper arc extinguishing device, the top end of the upper arc extinguishing device is vertically and upwardly provided with a grounding rod, and the lower end of the lower arc extinguishing device is provided with a lightning electrode for introducing an arc. The top end of the lower arc-extinguishing device is provided with an arc-extinguishing cylinder liquid supplementing port communicated with the upper arc-extinguishing device, and the arc-extinguishing access end of the upper arc-extinguishing device is electrically connected with the arc-extinguishing leading-out end of the lower arc-extinguishing device; the upper arc-extinguishing device comprises a liquid storage shell used for filling arc-extinguishing liquid and an arc-extinguishing structure arranged in the liquid storage shell, the top end of the lower arc-extinguishing device is provided with an arc-extinguishing cylinder upper electrode electrically connected with the arc-extinguishing structure, and an arc-extinguishing cylinder liquid supplementing opening in the top end of the lower arc-extinguishing device upwards penetrates through the arc-extinguishing cylinder upper electrode and is communicated with the inner bottom end of the liquid storage shell. According to the arc extinguishing method, the arc deposition energy can be improved, the electro-liquid effect arc extinguishing capacity and the power frequency arc reignition restraining capacity can be enhanced, and it is guaranteed that the arc extinguishing effect is in the optimal state.

The invention discloses a 35kV suspension type line discharge gap lightning arrester doubling as an insulator discharge gap, and relates to the technical field of lightning arresters, the lightning arrester assembly comprises a lightning arrester assembly, an adjusting assembly and a state detection assembly, the lightning arrester assembly comprises a first support plate and a second support plate, the first support plate is rotatably connected with the second support plate, the lightning arrester assembly further comprises a lightning arrester main body, and the lightning arrester main body is rotatably connected with the adjusting assembly. An adjusting assembly is arranged at the bottom of the second supporting plate and comprises a fixed arc plate and a protective shell, and a rotating arc plate is installed at the bottom of the first supporting plate. According to the lightning arrester, the adjusting assembly is installed, the position of the arc striking block is adjusted through the first telescopic rod, the first gear drives the rack to move, a rotating arc plate drives the first supporting plate to rotate, the first supporting plate drives the lightning arrester body to rotate, the position of the lightning arrester body is adjusted, and then the discharging gap is adjusted; the purpose of conveniently adjusting the discharge gap of the discharge gap lightning arrester is achieved, the arc extinguishing effect of the gap lightning arrester is improved, and the application range of the gap lightning arrester is expanded.

The invention provides a relay contact assembly and a relay, and relates to the technical field of electric power. The relay contact assembly comprises a pair of static contact leading-out ends, a movable contact spring, a first arc isolating piece and a second arc isolating piece, wherein the movable contact spring is used for being in contact with or separated from the pair of static contact leading-out ends; the first arc isolating piece is arranged outside the static contact leading-out end and is used for blocking arc transfer; and the second arc isolating piece is arranged on the movable contact spring and is used for blocking arc transfer. Under the combined action of the first arc-isolating piece and the second arc-isolating piece, the risk that the arc ablates the peripheral side wall of the stationary contact leading-out end and the peripheral side wall of the movable contact spring is reduced, the arc can be isolated more comprehensively, the transfer of the arc is hindered, and the thoroughness of arc extinguishing is improved.

The invention relates to the technical field of low-voltage apparatus switches, and particularly discloses an arc extinguishing structure and a circuit breaker, and the arc extinguishing structure comprises an arc extinguishing grid sheet group and a magnetic arc extinguishing assembly which are matched with a contact assembly. The arc extinguishing grid sheet group and the magnetic arc extinguishing assembly are arranged along a motion path of the moving contact, the magnetic arc extinguishing assembly is used for applying an acting force to an electric arc at the contact assembly, and the direction of the acting force intersects with a motion plane of the moving contact in the contact assembly. According to the invention, the arc extinguishing capability of the contact assembly can be enhanced without increasing the volume of the arc extinguishing chamber, so that the breaking capability of the direct current switch to direct current high voltage is effectively improved.

The invention relates to the field of low-voltage electric appliances, in particular to a contact system and a switching electric appliance comprising the contact system, the contact system comprises a rotary contact structure and at least one group of movable contact structures, the rotary contact structure comprises a rotary contact, the rotary contact comprises a rotary contact part, and the movable contact part comprises at least one group of movable contact structures. The movable contact structure comprises a movable contact, the movable contact comprises a movable contact part, and when the rotary contact is in the closed position, the rotary contact part and the movable contact part are combined to enable the rotary contact and the movable contact to be closed; the movable contact structure further comprises an elastic piece matched with the movable contact. In the breaking process of the rotary contact and the movable contact, when the rotary contact part drives the movable contact part to move from an initial position to a separation position, the elastic piece stores energy, the rotary contact continues to rotate, and the elastic piece releases energy to drive the movable contact part to reset to the initial position; the contact system and the switching device are high in breaking capacity.

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.

According to the environment-friendly gas insulation primary and secondary fusion complete ring main unit based on the magnetic control technology, a first gas box is divided into a primary loop cavity and a secondary loop cavity through a box body piston, and the primary loop cavity and the secondary loop cavity are filled with different insulation gases respectively. The primary loop cavity is filled with first insulating gas, and the gas pressure is dynamically adjusted through the magnetic control technology to enhance the arc extinguishing performance. The secondary circuit cavity can be filled with second insulating gas to provide a stable environment for the secondary circuit, and the secondary circuit cavity can be communicated with the primary circuit cavity through the ventilation system to mix the gas so as to improve the arc extinguishing performance. In addition, the ring main unit is additionally provided with a second gas tank which is filled with third insulating gas with different characteristics from the first insulating gas. And a second gas flow port controlled by the controller is arranged between the second gas tank and the first gas tank, and when necessary, the controller can open the valve to enable the third insulating gas to flow into the primary loop cavity, so that the gas composition is flexibly adjusted, and the arc extinguishing effect is optimized.

The invention relates to the technical field of electrical switches, and discloses an operating mechanism of a strip-shaped disconnecting switch, which comprises a shell, a plurality of contacts are arranged in the shell, a push plate is slidably mounted in the shell, and a plurality of main knife switches are arranged on the push plate. A rotating shaft and a clamping piece are matched to compress a spring and enable a second supporting piece to rotate, meanwhile, movement of the rotating shaft can drive a pull plate to move so as to drive a push plate to conduct opening and closing, and when the rotating shaft swings towards the other side through a critical point of rotation of the second supporting piece, the compressed spring releases energy, and therefore opening and closing are conducted. When the opening and closing speed is increased, the distance between the contact and the main knife switch is increased more within the same time, so that the electric arc is lengthened quickly, the electric arc is extinguished more easily, and the arc extinguishing effect is improved.

A two-side arc extinguishing type contact arc extinguishing system is characterized in that the two-side arc extinguishing type contact arc extinguishing system at least comprises an arc contact, an included angle is formed between a contact part of the arc contact and a rod part of the arc contact, and an arc channel of an arc extinguishing chamber corresponds to the contact part of the arc contact. By changing the shape of the contact part, not only is the width space of the product fully utilized, but also the electric repulsive force is formed to enable the electric arc magnetic blow-out force of the two-pole contact to face the two sides, so that the arc extinguishing effect is improved.

The invention relates to the field of low-voltage electric appliances, in particular to a contact system and a switching electric appliance comprising the contact system, the contact system comprises a main contact structure and at least one movable contact structure, the main contact structure comprises a main contact, the main contact comprises at least one main contact part, the movable contact structure comprises a movable contact, and the main contact part comprises at least one main contact part. The movable contact comprises a movable contact part; the main contact part and the movable contact part are matched in an inserting manner to enable the main contact and the movable contact to be closed; the contact system and the switching device are simple in structure and reliable in contact.

The invention discloses a closed circular ceramic high-voltage direct-current magnetic quenching chamber, and relates to the technical field of trigger arc extinguishing, and the closed circular ceramic high-voltage direct-current magnetic quenching chamber comprises an arc extinguishing unit which comprises a mounting assembly arranged in a bottom shell and an arc extinguishing assembly arranged at the other end of the mounting assembly. According to the ceramic closed cavity structure of the high-voltage direct-current arc extinguishing cavity, heat resistance and reliability can be improved, the performance in a high-temperature environment is enhanced, the structural strength is enhanced through the design of the magnetic steel, the electrodes are effectively protected against electric arc damage, the cavity temperature is effectively controlled, material degradation is prevented, the arc extinguishing effect is improved through the built-in magnetic steel assembly and the built-in arc extinguishing assembly, and the service life of the high-voltage direct-current arc extinguishing cavity is prolonged. And through the design of the single-side auxiliary electrode and the mounting assembly, the assembly efficiency is improved, the service life of the product is prolonged, the influence of electric arc on the electrode is reduced, the safety is improved, the breakdown and explosion risks are reduced, and the normal work of the high-voltage relay is ensured.

The utility model relates to a high-voltage plastic shell isolation switch. The high-voltage plastic shell isolation switch comprises a contact assembly and an arc extinguishing assembly. The contact assembly comprises a fixed contact and a moving contact, the fixed contact is fixedly arranged, the moving contact can be movably arranged relative to the fixed contact, and the moving contact and the fixed contact are electrically connected when being in contact; the arc extinguishing assembly comprises an arc extinguishing shell and gas generating parts, an arc extinguishing space is arranged in the arc extinguishing shell, the moving path of the moving contact is located in the arc extinguishing space, the two gas generating parts are located in the arc extinguishing space and arranged at intervals, the static contact and the moving contact are located between the two gas generating parts, and the spacing distance between the two gas generating parts is 8-12 mm. According to the scheme, when the moving contact and the static contact are disconnected, the exhaust speed is increased, airflow is equally divided, arc extinguishing is efficient, and then zero flashover is achieved.

The utility model discloses a contactor, which comprises a base, a plurality of loops are arranged on the base, each loop is provided with an accommodating cavity, an arc extinguish chamber is respectively introduced into a wire inlet end and a wire outlet end of each loop, the arc extinguish chambers are vertically arranged in the accommodating cavities, and the contactor also comprises a rear wall, the rear wall is located between the first side wall and the second side wall, so that the first side wall, the red steel paper sheet and the second side wall form a groove body, the plurality of first arc extinguishing grid sheets are located in the groove body, the first arc extinguishing grid sheets are close to the rear wall and embedded in the rear wall, and the second arc extinguishing grid sheets are close to the rear wall and embedded in the rear wall. And one end, far away from the rear wall, of the first arc extinguishing grid sheet is of a sawtooth structure. Compared with the prior art, due to the fact that the rear walls are arranged at the rear ends of the first side wall and the second side wall of the contactor, the arc extinguishing effect when the contactor is disconnected is improved, the electric service life of a product is prolonged, in addition, the exhaust groove is formed in the rear wall of the arc extinguishing chamber, arc cooling can be accelerated, and the arc extinguishing effect is improved.

The utility model discloses a direct current relay, comprising a contact system which comprises a movable contact piece and a static contact piece which are matched with each other, and the movable contact piece is contacted with or disconnected from the static contact piece under the driving of a magnetic circuit system of the direct current relay; the arc extinguishing magnetic assembly comprises a special-shaped permanent magnet, and at least one end of the special-shaped permanent magnet is bent towards one side, so that a magnetic field on the bent side forms a magnetic line gathering area; the contact system is configured to be located on the bent side of the special-shaped permanent magnet and arranged corresponding to the magnetic line gathering area of the special-shaped permanent magnet. When the special-shaped permanent magnet is used as a carrier of an arc extinguishing magnetic field, most of the magnetic field generated by the special-shaped permanent magnet is concentrated towards the middle, that is, magnetic lines of force on the arc-shaped inner surface of the special-shaped permanent magnet are high in concentration degree at the central position of a contact and can better correspond to the contact part, so that a good arc extinguishing effect is achieved; in other words, compared with a square permanent magnet, the arc-shaped block-shaped permanent magnet is more beneficial to achieving utilization maximization of an arc extinguishing magnetic field, the initial moving speed of the arc is increased, and the arcing time is shortened.

The utility model provides a switch body and an isolating switch, and relates to the technical field of low-voltage electrical appliances, and the switch body comprises a housing, a moving contact driven to rotate in the housing, static contacts arranged at two opposite sides of the housing along a first direction, and arc extinguish chambers arranged at two opposite sides of the housing along a second direction. The two ends of the moving contact are simultaneously contacted with or separated from the static contacts on the two sides in the rotating process, and the first direction is perpendicular to the second direction. According to the switch body and the isolation switch provided by the invention, the problem that the isolation switch can bear relatively low voltage in the prior art is solved.

The utility model discloses an arc extinguish chamber structure of a circuit breaker, comprising a body, the body is provided with at least two cavities, each cavity accommodates an arc extinguish grid sheet group, an insulating part is arranged between two adjacent cavities, the insulating part limits arc channeling of the two adjacent arc extinguish grid sheet groups, the insulating part is provided with a shielding part, and the shielding part isolates magnetic fields of the two adjacent cavities; the arc extinguishing structure is formed by the plurality of arc extinguishing grid sheet groups, so that the cutting arc extinguishing effect of the arc is improved, and secondly, the shielding part is arranged, so that the situation that the movement of the arc and the arc extinguishing effect are influenced due to interference of magnetic fields of two adjacent cavities in the using process is prevented.

The invention provides a high-voltage circuit breaking device integrated with active and passive protection. An excitation power-off switch comprises a first conductive plate, an excitation device and a power device, a first weak part is formed at the joint between the first conductive part and the second conductive part of the first conductive plate, a second weak part is formed at the joint between the second conductive part and the third conductive part, the third conductive part is connected in series with the rapid fuse, and the part, close to the first weak part, of the second conductive part is provided with an arc isolation module and a rotating shaft; an excitation device and a power device are arranged in the upper shell; the lower end of the power device is downwards aligned with an area, close to the second weak part, of the second conductive part; the arc extinguishing fuse and the second conductive part are connected in parallel. The arc extinguishing fuses connected in parallel and the high-speed fuses connected in series are arranged, the structure is compact, the voltage endurance capability and the breaking range, the arc extinguishing capability and the breaking reliability in a high-voltage electrical environment are improved through the double-fracture design, and circuit safety is guaranteed.

The utility model relates to an insulating cylinder, an arc extinguish chamber and a circuit breaker, the insulating cylinder comprises at least two cylinder body units, each cylinder body unit comprises a middle cylinder body and end cylinder bodies located at two ends of the middle cylinder body, the inner diameter of the middle cylinder body is larger than that of the end cylinder bodies, and the inner diameters of the end cylinder bodies decrease progressively from one side close to the middle cylinder body to one side far away from the middle cylinder body. According to the insulating cylinder, the volume of the inner cavity of the middle part is increased, so that hot airflow generated during arc combustion has more diffusion space, and the arc can be quickly extinguished; and the cylinder wall structure design of the insulating cylinder enables the creepage distance of the arc to be increased, so that the fracture insulating capability of the arc extinguish chamber can be improved, and the arc extinguishing performance and the insulating performance of the circuit breaker can be improved while the inner diameter and the size of the shell of the circuit breaker are ensured to be smaller.

The utility model discloses an arc extinguishing system of a circuit breaker. The arc extinguishing system comprises an arc extinguishing device, a contact system, an air outlet assembly and a support. The arc extinguishing device is internally provided with segmented arc extinguishing grid sheet groups, and a plurality of expanded arc extinguishing grid sheet groups and arc extinguishing grid sheet groups are sequentially arranged at intervals, so that the number of arc extinguishing grid sheets is increased, and an electric arc generated by opening is divided into more short arcs, thereby improving the electric arc voltage and improving the electric arc extinguishing capability of the arc extinguishing device. Besides, the exhaust holes in the first insulating plate of the air outlet assembly are uniformly arranged, the positions of the exhaust holes in the second insulating plate correspond to those of the expanded arc-extinguishing grid groups, and the size of the exhaust hole corresponding to the expanded arc-extinguishing grid group in the middle is smaller than that of the exhaust holes corresponding to the expanded arc-extinguishing grid groups at the two ends. And the exhaust holes on the bracket correspond to the expanded arc-extinguishing grid sheet group in position and are the same as the expanded arc-extinguishing grid sheet group in size. According to the scheme, the arc extinguishing performance of a product can be improved on the premise of not changing the size of the arc extinguishing chamber when the circuit breaker breaks the fault current.

The invention relates to the field of switches with arc extinguishing or arc preventing devices, in particular to a self-energy arc extinguishing chamber and a circuit breaker. The self-energy arc extinguish chamber comprises an air compression chamber cylinder barrel internally provided with a partition plate, a moving contact is installed in the air compression chamber cylinder barrel in a sealed and sliding mode on the front side of the partition plate, the moving contact is connected with a transmission rod penetrating through the partition plate in a sealed and sliding mode, an exhaust port is formed in the transmission rod, and an expansion chamber is formed in the moving contact. An air compression chamber is formed between the partition plate and the moving contact in the air compression type cylinder barrel, an exhaust chamber is formed on the side, opposite to the air compression chamber, of the partition plate, a pressure release valve and an air supplementing valve are arranged on the partition plate, a check valve is arranged on the moving main contact, an air supplementing opening is formed in the cavity wall of the exhaust chamber, and an air guide channel is formed between the air supplementing opening and the air supplementing valve. Gas exhausted from the transmission rod is isolated through the gas guide channel. Therefore, the high-temperature decomposed gas and impurities can be prevented from being supplemented into the air compression chamber along with the insulating gas, so that the gas supplemented into the air compression chamber is relatively clean insulating gas, and the arc extinguishing effect of the arc extinguishing chamber is improved.

The invention provides a circuit breaker with a thermal bimetal tripping linkage mechanism and a control method. Comprising a shell, a contact system, an operating mechanism, a locking mechanism, a thermal bimetallic strip overload protection mechanism, an electronic protection module, a mechanical linkage device and a state indicating device, the mechanical linkage device comprises an L-shaped driving lever capable of rotating around a rotating shaft, and the L-shaped driving lever is provided with a first driving arm and a second driving arm; the output end of the thermal bimetallic strip overload protection mechanism is operationally coupled with the first driving arm and is used for driving the first driving arm to enable the L-shaped shifting rod to rotate around the rotating shaft in a first direction during overload; the electronic protection module comprises an electromagnetic tripper, a movable ejector pin of the electromagnetic tripper is operatively coupled with the second driving arm, and the electromagnetic tripper is used for driving the second driving arm to enable the L-shaped shifting rod to rotate around the rotating shaft in a second direction opposite to the first direction during short circuit or electronic protection action; and the indicating piece displays different protection action type identifiers according to different rotation directions of the L-shaped driving lever.

The utility model discloses a moving and static contact connecting mechanism of an isolating switch, which relates to the technical field of isolating switches and comprises a bearing frame, a driving rod, a first insulating column, a first contact piece and a second traction rod. The brake control mechanism comprises a driving rod, a connecting brake rod, a first traction rod, a first insulating column and a second traction rod, the driving rod is connected with an external driving assembly to provide power for the first traction rod, the first insulating column and the second traction rod to drive the connecting brake rod to achieve the opening and closing functions, the optimal design of an arc extinguishing block and the application of a high-performance material are achieved, and the service life of the arc extinguishing block is prolonged. Therefore, the arc extinguishing efficiency is greatly improved, the damage of the arc to the contact and the surrounding parts is reduced, the maintenance cost is reduced, and the overall service life of the isolating switch is prolonged.

An arc extinguishing device and a switching device relate to the technical field of low-voltage apparatuses. The arc extinguishing device comprises a magnetic assembly, a first arc extinguishing assembly and a second arc extinguishing assembly, each of the first arc extinguishing assembly and the second arc extinguishing assembly comprises at least one arc extinguishing structure, and any one arc extinguishing structure of the first arc extinguishing assembly is in equipotential connection with one arc extinguishing structure of the second arc extinguishing assembly; the magnetic assembly comprises a plurality of permanent magnets, the permanent magnets are arranged at intervals in the second direction, and the magnetic pole direction of each permanent magnet, the first direction and the second direction are perpendicular in pairs. According to the arc extinguishing device, the arc extinguishing effect of the arc extinguishing device can be improved on the basis of not increasing the height of the arc extinguishing device.

The utility model discloses a contact arc extinguishing system, which comprises a static contact, an arc extinguishing chamber and a magnetic conductive assembly, and is characterized in that the arc extinguishing chamber is positioned near the static contact; the arc extinguishing chamber comprises arc extinguishing grid sheet groups which are sequentially stacked along one direction; the static contact comprises a contact part, the magnetic conduction assembly comprises two side magnetic conduction sheets and a magnetic conduction block, the magnetic conduction block is located below the contact part, and the two side magnetic conduction sheets are arranged on the two sides of the contact part respectively; wherein the two side magnetic conductive sheets extend in the direction of the magnetic conductive block to form extension parts, and the extension parts abut against the magnetic conductive block; although the split type magnetic conduction assembly is adopted, the magnetic conduction assembly still has the advantage of being good in magnetic conduction effect.

The present invention provides an arc extinguishing structure of a small circuit breaker, comprising a housing, a static contact, two arc-isolating plates, an arc-strike component and an arc-extinguishing chamber arranged in the housing, wherein the two arc-isolating plates are arranged on both sides of the static contact, the arc-strike component is suitable for guiding the arc to the arc-extinguishing chamber, and a limiting structure suitable for limiting the position of the arc-isolating plates is arranged between the arc-strike component and the arc-isolating plates. The relative positions of the two arc-isolating plates are thereby limited so that the spacing between the two arc-isolating plates is maintained at a preset optimal spacing, thereby increasing the stability of the airflow and improving the reliability of arc extinguishing.

A relay belongs to the technical field of relays and comprises a frame, an iron core, a coil winding, a yoke, a pressure spring, an armature, a pushing card, a movable spring leading-out pin, a movable reed, a movable contact, a static spring leading-out pin, a static reed and a static contact. The angle of the right lower bending part of the middle part of the movable contact spring is 137.5 + / -0.5 degrees, and the angle of the right part of the movable contact spring close to the right upper bending part of the movable contact is 145.5 + / -0.5 degrees; the angle of the downward bending part of the middle part of the static reed is 90 degrees + 1 degree / -0 degree; by bending the movable reed and the static reed, the contact gap of the relay is greater than or equal to 1.8 mm after the relay is assembled; the coil winding comprises a coil holder and a coil, and the diameter of the coil winding is smaller than or equal to 10 mm. The beneficial effects of the utility model are that the arc extinguishing capability is strong, the relay can operate normally when a large current is used, and no safety risk exists.

The invention belongs to the field of electric power, and particularly relates to a high-voltage circuit breaker device for an intelligent power grid, which comprises a circuit breaker body, an arc extinguish chamber is arranged in the circuit breaker body, an arc extinguish grid assembly is arranged in the arc extinguish chamber, and the arc extinguish grid assembly comprises a shell and a plurality of arc extinguish grid sheets mounted in the shell. The arc extinguishing grid assembly further comprises a first piezoelectric ceramic piece and a second piezoelectric ceramic piece, the first piezoelectric ceramic piece and the second piezoelectric ceramic piece are installed on the two sides of the shell respectively, the first piezoelectric ceramic piece and the second piezoelectric ceramic piece are both fixedly connected with the outer side wall of the shell, and the first piezoelectric ceramic piece and the second piezoelectric ceramic piece are both parallel to the arc extinguishing grid piece. According to the low-voltage circuit breaker, the arc extinguish chamber in an existing low-voltage circuit breaker is optimally designed, the arc extinguish grid pieces are improved, and the first piezoelectric ceramic piece and the second piezoelectric ceramic piece are additionally arranged, so that the arc extinguish effect can be remarkably improved, zero flashover can be achieved, the arc extinguish effect of the arc extinguish chamber is good, the size of the arc extinguish chamber does not need to be multiplied, and practicability is high.

The arc extinguishing system comprises an arc isolating cover and at least one pair of arc extinguishing magnets, a magnetic field space is reserved in each pair of arc extinguishing magnets in a first direction, a contact mechanism is arranged in the magnetic field space, the contact mechanism comprises a moving contact bridge and two static contacts, and the moving contact bridge is connected with the static contacts. The moving contact bridge is arranged along a second direction and moves in a third direction, so that two moving contact parts of the moving contact bridge are respectively matched with the two static contacts, the first direction, the second direction and the third direction are mutually perpendicular, two ends of each arc extinguishing magnet are respectively two magnetic poles, and the two magnetic poles are mutually perpendicular to each other. The connecting line between the two magnetic poles of the same arc extinguishing magnet is parallel to the second direction, and the same magnetic poles of the same pair of arc extinguishing magnets face the same direction. The contact mechanism is located between the arc extinguishing magnets arranged in pairs, and the magnetic poles of the arc extinguishing magnets are located at the end positions, so that the magnetic induction lines of the arc extinguishing magnets in the magnetic field space are parallel to the movable contact bridge, the limitation of the space on the sizes of the arc extinguishing magnets is relieved, and the arc extinguishing effect is improved.