26results about How to "Improve breaking capacity" patented technology

The vacuum contact comprises a static end contact and a moving end contact, the static end contact comprises a first transverse magnetic assembly and a first longitudinal magnetic assembly, the first transverse magnetic assembly comprises a first spiral arm contact piece and a first conducting rod, the first longitudinal magnetic assembly is of a hollow structure, and the first longitudinal magnetic assembly is arranged on the peripheral side of the first conducting rod in a sleeving mode; the first radial arm contact blade is fixed at one end of the first conducting rod and is in contact with the first longitudinal magnetic assembly; the moving end contact comprises a second transverse magnetic assembly and a second longitudinal magnetic assembly, the second transverse magnetic assembly comprises a second radial arm contact blade and a second conducting rod, the second radial arm contact blade is fixed at one end of the second conducting rod and is arranged opposite to the first radial arm contact blade, and the second longitudinal magnetic assembly is of a hollow structure and is fixed on the first radial arm contact blade. The second longitudinal magnetic assembly sleeves the peripheral side of the second conductive rod. The advantages of the two magnetic fields are combined to control movement and diffusion of the vacuum arc, and the breaking capacity of the vacuum contact is improved from the aspect of mechanism.

This utility model relates to a double-acting arc-extinguishing chamber based on ball screw transmission, including a housing, a moving contact and a stationary contact disposed within the housing, a ball screw rotatably disposed within the housing, a first fixed block fixedly connected to the moving contact, and a second fixed block fixedly connected to the stationary contact. One end of the ball screw is connected to a drive device. The ball screw has a first threaded section and a second threaded section with opposite directions of rotation. The first fixed block is threadedly connected to the first threaded section, and the second fixed block is threadedly connected to the second threaded section. A first guide rail is fixedly disposed on the housing, slidingly engaging with the first fixed block, and a second guide rail is slidably engaged with the second fixed block. This utility model, through ball screw transmission, converts rotational motion into linear motion of the first and second fixed blocks, realizing the opposite or opposite movements of the moving and stationary contacts, improving the closing and opening speeds of the arc-extinguishing chamber, shortening the breaking time, and effectively improving the breaking capacity of the circuit breaker.

The utility model belongs to the field of electrical technology, and particularly relates to a contact assembly and a circuit breaker, and the contact assembly comprises a moving contact which is provided with a moving contact, and the moving contact is located at one end of the moving contact; the static contact is provided with at least two static contact points, the at least two static contact points are sequentially arranged at one end of the static contact at intervals, and the static contact points and the movable contact points are arranged oppositely; wherein the moving contact can move towards the side close to or away from the static contact, so that the moving contact is in contact with the at least two static contacts. Contact resistance can be reduced, the heating phenomenon can be reduced, local energy accumulation can be avoided, and therefore the service life of the circuit breaker is prolonged, and the breaking capacity of the circuit breaker is improved.

The utility model discloses an exhaust structure of an alternating current circuit breaker, which relates to the field of circuit breakers and comprises a shell and an arc extinguish chamber, the shell comprises a middle cover, a left cover and a right cover, the left cover and the right cover are mounted on two sides of the middle cover, and the middle cover is provided with a plurality of first gas guide plates for guiding gas from the arc extinguish chamber to the left side and the right side. The middle cover and the left cover are matched to form a first exhaust channel, the middle cover and the right cover are matched to form a second exhaust channel, a third exhaust channel and a fourth exhaust channel, and a first outlet communicated with the first channel and a second outlet communicated with the second exhaust channel and the fourth exhaust channel are formed in the bottom of the side wall of the shell. And a third outlet communicated with the third channel is formed in the upper surface of the shell. The utility model has the advantages of space saving and good safety.

This invention discloses a novel liquid nitrogen switch with adjustable opening distance, comprising a housing, and further comprising: a permanent magnet operating mechanism on the outside of the housing sidewall; a main shaft rotatably connected to the permanent magnet operating mechanism; a trip spring arm fixedly connected to the main shaft; a trip spring connected at one end to the trip spring arm; a vertically arranged channel steel; a positioning block fixed to the side of the channel steel; an insulating pull rod fixedly connected to the main shaft; two protrusions opposite each other at the lower end of the insulating pull rod; two annular vertical plates on the moving contact rod, with the protrusions abutting between the two annular vertical plates; a copper-tungsten alloy electrode disposed at the front end of the moving contact rod; and a stationary conductive element disposed opposite to the copper-tungsten alloy electrode. This invention uses a permanent magnet operating mechanism as the operating mechanism, and limits the range of motion of the main shaft by changing the size of the positioning block to achieve an adjustable switch opening distance. A high-pressure glass observation window is also provided to meet the need for observing the liquid nitrogen arc in experiments.

The utility model relates to a lower isolation environment-friendly semi-solid-sealed switch, which realizes high integration of switch equipment by integrating a circuit breaker assembly, a static contact assembly, a moving contact assembly and the like on a mechanism frame, and is characterized in that a vacuum arc-extinguishing chamber is arranged in each semi-solid-sealed polar pole, so that the generation and diffusion of electric arcs can be effectively inhibited in a vacuum environment, and the reliability of the switch equipment is improved. The breaking capacity and the arc extinguishing speed of the switch are improved, the cam transmission assemblies are driven through the rotating motion of the main shaft, then the opening and closing operation of the vacuum arc extinguishing chamber is achieved, mutual interference between the cam transmission assemblies is effectively prevented through the arrangement of the interphase check rings, and the sealing performance of the vacuum arc extinguishing chamber is enhanced through the fixed sealing plug. According to the utility model, external impurities and moisture are prevented from invading, so that the service life of the switch is prolonged, the conductive clamp ensures good connection between the vacuum arc-extinguishing chamber and an external circuit, and the conductive performance and the electrical stability of the switch are improved.

The application relates to the field of low-voltage electrical apparatuses, in particular to an arc extinguishing device, wherein a front moving contact and a front static contact are oppositely matched along a direction d1, a rear moving contact and a rear static contact are oppositely matched along the direction d1, a front arc extinguishing chamber and a rear arc extinguishing chamber are arranged side by side and at intervals along a direction d2, and a conductive cross beam is connected in series between the front static contact and the rear static contact and extends along the direction d1; in a direction d3, the conductive cross beam and an arc inlet end of the front arc extinguishing chamber form a front contact area for closing and opening a front moving contact point of the front moving contact and a front static contact point in the front static contact, the conductive cross beam and an arc inlet end of the rear arc extinguishing chamber form a rear contact area for closing and opening a rear moving contact point of the rear moving contact and a rear static contact point in the rear static contact, and the front contact area and the rear contact area are arranged side by side and at intervals along the direction d2; the direction d1, the direction d2 and the direction d2 are perpendicular to each other; and the arc extinguishing device has high arc extinguishing efficiency and effect.

The application discloses a kind of high surface natural micropore structure regulation-based high surface withstand voltage polyimide and preparation method and application thereof, belong to high voltage insulating material technical field, after drying diamine is dissolved in solvent A, then add dianhydride, after stirring uniformly, obtain polyamide acid solution;Add pore forming agent again, high-speed stirring is uniformly dispersed, obtain mixed viscous solution C;After coating, drying, imidization high temperature heating, and natural cooling, immerse in liquid B and extract pore forming agent, after drying, obtain high surface natural micropore structure regulation-based high surface withstand voltage polyimide.The polyimide surface has natural pore structure, surface is along the surface of electric field, and the through-hole structure is densely distributed along the surface of electric field, and the electron is easy to drop into the through-hole structure in the jumping multiplication process when flashover, and it is difficult to return to the surface, so that the secondary electron multiplication process is inhibited, the probability of forming secondary electron avalanche is reduced, so as to realize the improvement of surface withstand voltage.

The application discloses a kind of intelligent magnetic control low-voltage switch device, including magnetic control primary module and blade type secondary module;The magnetic control primary module includes first bottom shell, first top shell, plastic shell baffle, bottom plate, the first bottom shell, first top shell, plastic shell baffle, bottom plate form entire shell frame;The application can realize automatic opening and closing under the size requirement of original manual plastic shell circuit breaker, directly replace the existing old switch of station area, the opening and closing speed is greatly changed fast, improve mechanical performance, effectively increase the space capacity of secondary control module, realize high intelligence, one, secondary integral modular design, secondary module heat insulation design, secondary control module can be plugged, can realize not power replacement secondary module, improve the operation and maintenance ability of product, the service life of primary and secondary module is same period, greatly improve the service life of device, secondary vulnerable components can be plugged alone, improve the flexibility of device, with higher scientificity, logic.

The application relates to the technical field of low-voltage electrical apparatus, in particular to a circuit breaker, which comprises a protective shell, an arc extinguishing assembly, a moving contact for connecting an anode and a static contact for connecting a cathode; an arc extinguishing chamber is formed in the protective shell, the arc extinguishing chamber is divided into a first region and a second region; the first region is close to a tripping position of the moving contact, and the second region is close to the static contact; the arc extinguishing assembly comprises a first group of arc extinguishing fins arranged in the first region and a second group of arc extinguishing fins arranged in the second region; the number of the first group of arc extinguishing fins is less than that of the second group of arc extinguishing fins; when in the tripping position, an electric arc at the moving contact is transferred to the first group of arc extinguishing fins. The application optimizes the structure of the first group of arc extinguishing fins by improving the transfer efficiency of the electric arc on the moving contact, thereby effectively enhancing the utilization rate of the arc extinguishing fins.

The invention relates to the technical field of circuit protection devices, in particular to a double-layer arc-extinguishing flat plate type fuse which comprises an insulating shell, a melt and a composite arc-extinguishing core, the melt is provided with a center fusing area and a terminal area which are integrally formed, and the composite arc-extinguishing core is arranged in the insulating shell and surrounds the center fusing area. A first arc extinguishing cavity for accommodating a gas production material is formed in the first arc extinguishing chamber to form a first arc extinguishing layer; and a second arc extinguishing cavity filled with an arc extinguishing medium is formed between the insulating shell and the composite arc extinguishing core body to form a second arc extinguishing layer. According to the invention, during breaking, high-pressure airflow can be quickly generated to suppress electric arcs in a segmented manner, and continuous cooling and insulation are realized by an external medium, so that the arcing time is greatly shortened, the internal pressure is effectively controlled, the shell is prevented from bursting, and the breaking capacity, safety and reliability of high-voltage and large-current faults are remarkably improved.

The application relates to the technical field of circuit breakers, and discloses a small-sized DC circuit breaker which comprises a circuit breaker body, a static contact is arranged on the circuit breaker body, an operating mechanism is rotationally connected to the circuit breaker body, a dynamic contact is arranged on the operating mechanism, a first magnet and a second magnet are arranged on the circuit breaker body, the first magnet and the second magnet have the same magnetism, a first channel for separating the dynamic contact and the static contact is formed between the first magnet and the second magnet, and the first channel can repel an electric arc. The application can form a strong magnetic field region between the first magnet and the second magnet, a strong electric arc generated when the dynamic contact and the static contact are disconnected can be rapidly driven away from a contact gap, and the electric arc can be directionally stretched and cooled along the first channel, so that the electric arc can be effectively prevented from stagnating in the contact region, gathering energy and continuously burning, the degree of burning of a contact surface is reduced, the extinction efficiency of the electric arc is improved, and the breaking capacity, electrical life and working stability of the circuit breaker body are improved.

The application relates to the field of low-voltage electrical apparatus, in particular to a static contact structure, a front static contact of which comprises a front bearing plate and a front static contact point, the front bearing plate comprising a front bearing main plate provided with the front static contact point on one side; a rear static contact comprises a rear bearing plate and a rear static contact point, the rear bearing plate comprising a rear bearing main plate provided with the rear static contact point on one side; a conductive cross beam extends along a direction d1; in a direction d2, the front static contact point and the rear static contact point are arranged in a staggered mode; in a direction d3, the front bearing main plate and the rear bearing main plate are located on the same side of the conductive cross beam; the direction d1, the direction d2 and the direction d3 are perpendicular to each other; the static contact structure is applied to a circuit breaker, and can improve the breaking capacity and the arc extinguishing efficiency and effect.

This invention discloses a vacuum circuit breaker contact with a built-in reverse conductor, relating to the field of vacuum circuit breaker technology. The vacuum circuit breaker contact with a built-in reverse conductor includes a contact plate, a contact cup, a conductive rod, a reverse conductor, and a support structure. The contact plate is connected to the top of the contact cup, the conductive rod is connected to the contact cup, and the reverse conductor is disposed inside the contact cup. The support structure is connected to the circuit breaker housing via an insulating rod to ensure its relatively fixed position. A through groove is formed at the bottom of the contact cup, corresponding to the support structure passing through the through groove. Several first helical grooves are formed on the sidewall of the contact cup, and several second helical grooves are formed on the sidewall of the reverse conductor. The rotation direction of the second helical grooves is opposite to that of the first helical grooves. The vacuum circuit breaker uses this vacuum circuit breaker contact with a built-in reverse conductor. This invention can solve the problem in the prior art where residual magnetism between poles affects the breaking effect during interruption in DC vacuum circuit breakers, thus improving the breaking performance and reliability of DC vacuum circuit breakers.

This utility model discloses an integrated arc extinguishing and arc suppression device and a circuit breaker having the same, including an arc extinguishing chamber unit and an arc suppression chamber unit. The arc suppression chamber unit is integrally connected to the arc extinguishing chamber unit through a set of mounting side plates, and an extension baffle is formed by the set of mounting side plates extending towards the circuit breaker wiring port. The mounting side plates and the extension baffles are integrally formed to constitute the side walls of the arc extinguishing chamber unit and the arc suppression chamber unit, respectively. In this integrated structure, the ends of the extension baffles directly cover the inner walls on both sides of the wiring port, forming a continuous arc extinguishing cavity and an arc suppression cavity, completely eliminating the gaps caused by assembly, structurally blocking the path of arc escape, and improving the overall arc extinguishing and arc suppression efficiency. The integrated arc extinguishing chamber and arc suppression chamber structure significantly compresses redundant space, improves the internal layout compactness without increasing the overall volume of the circuit breaker, and significantly improves the cabinet space utilization rate.

This utility model relates to an air outlet structure for a miniature circuit breaker. By setting a first air outlet and a second air outlet on the housing, a multi-channel arc-extinguishing path is formed. During the operation of the circuit breaker, the electric arc and heat generated inside can be quickly dissipated through these two air outlets, preventing the airflow from interfering with each other within the arc-extinguishing assembly. This effectively reduces the residence time of the electric arc inside the circuit breaker. The first air guide wall between the arc-extinguishing assembly and the first air outlet, and the second air guide wall between the arc-extinguishing assembly and the second air outlet, play a role in precisely guiding the airflow. When an electric arc is generated, the air guide wall can guide the airflow in an orderly and uniform manner to the arc-extinguishing assembly, forming a stable and suitable airflow field around the arc-extinguishing grid. This airflow field helps to quickly remove the heat and plasma generated by the electric arc, accelerate the arc extinguishing process, improve the arc extinguishing efficiency, reduce the erosion of the internal components of the circuit breaker by the electric arc, and enhance the breaking capacity and reliability of the circuit breaker.

The application discloses an excitation fuse with a fuse structure, which comprises a shell, an excitation source, at least one conductive row, and a fuse structure. The shell is provided with a first cavity and a second cavity filled with arc-extinguishing medium. The driving force release end of the excitation source is communicated with the first cavity, and the conductive row penetrates through the shell and the first cavity. The fuse structure is at least partially arranged in or penetrates through the arc-extinguishing medium in the second cavity. The fuse structure comprises a fuse and an insulating spacer, at least one insulating spacer is arranged on the fuse in the current direction, the fuse penetrates through the insulating spacer, the insulating spacer is used for partially or completely isolating the arc at the breaking point of the fuse, and the insulating spacer releases gas under the high temperature of the arc and cools the arc. The excitation fuse uses the fuse structure, so that the breaking performance, the insulation performance after breaking and the withstand voltage performance of the fuse can be improved.

A moving contact mechanism and circuit breaker are disclosed, comprising: a contact support having a first surface and a second surface; the first surface having a first mounting surface; a positioning shaft being provided on the first mounting surface; and a mating wall being provided on one side of the first mounting surface, the mating wall having a positioning groove; a moving contact having a circular hole adapted to the positioning shaft, being mounted on the first mounting surface, and the moving contact extending towards the stationary contact to form a positioning block, the positioning block being adapted to the positioning groove; a torsion spring sleeved on the positioning shaft, one end of which overlaps with the contact support, and the other end of which overlaps with the moving contact; a latch rotatably disposed on the second surface of the contact support; and a jump catch rotatably disposed on the second surface of the contact support and overlapping with the latch. This application utilizes the engagement of the positioning block of the moving contact with the positioning groove of the contact support to limit the swing of the moving contact on the contact support, ensuring that the position of the moving contact in contact with the stationary contact remains consistent each time.

This utility model discloses a high-current electromagnetic system for a miniature circuit breaker, comprising a magnetic system body, which includes an electromagnetic coil assembly, and a magnetic yoke is fitted around the electromagnetic coil assembly. After the magnetic yoke is fitted around the electromagnetic coil assembly, only one side of the electromagnetic wires of the electromagnetic coil assembly is exposed. A base plate is provided below the magnetic yoke; by raising the base plate, its upper surface is brought closer to the electromagnetic wires of the electromagnetic coil assembly. In summary, by using the magnetic yoke fitted around the electromagnetic coil assembly, the magnetic yoke can form closed magnetic circuits in both the XY and ZY planes, generating the maximum attraction force with the fewest spiral coil turns, thus improving the short-circuit breaking capacity.

The application discloses an electrical protection device for a low-voltage circuit, comprising a protection shell, a double-contact assembly, a contact seat assembly, an arc blowing assembly and an arc extinguisher, in order to solve the technical problem that the general electrical protection device in the prior art has slow arc extinguishing speed, limited breaking capacity, and the contact is easy to be ablated and damaged when frequently breaking the arc, and lacks a mechanism for preventing misoperation after fault tripping, resulting in insufficient safety, the application designs the above-mentioned electrical protection device for a low-voltage circuit, the double-contact assembly is used for realizing isolation protection of the arc and the main contact, the arc blowing assembly and the arc extinguisher are used for accelerating the movement and extinguishing of the arc in a cooperative manner, and the self-locking mechanism is used for preventing misoperation after fault, so that the breaking performance and operation safety of the device are improved, and the stable operation of the low-voltage circuit system is ensured.

The utility model discloses a circuit breaker arc extinguishing system and a miniature circuit breaker which are better in arc striking effect and suitable for large current. According to the technical scheme, the circuit breaker comprises an arc extinguish chamber and an arc striking mechanism, the arc striking mechanism comprises an arc striking plate, a magnetic conductive rod, a magnetic conductive sheet and an arc isolating sheet, the lower end of the arc striking plate is arranged at the bottom of the arc extinguish chamber, the upper end of the arc striking plate extends to the position below a moving contact of the circuit breaker, the magnetic conductive rod is arranged between a static contact of the circuit breaker and the arc extinguish chamber, and the magnetic conductive sheet is arranged on the arc isolating sheet. The arc isolating sheet and the magnetic conductive sheet are sequentially arranged on the side face of a static contact of the circuit breaker and located in front of the arc extinguish chamber.

A direct current contactor capable of executing large current breaking for multiple times comprises a shell, a driving system, a contact system, an electronic ignition assembly and a telescopic action execution assembly. The action execution assembly is arranged in the shell corresponding to the movable contact plate; the electronic ignition assembly is arranged at the top of the shell corresponding to the action execution assembly; the electronic ignition assembly comprises an electronic ignition tube shell and at least two electronic ignition tubes, and an exhaust channel communicated with the exterior of the shell is formed in the shell wall of the electronic ignition tube shell. The action execution assembly is in sealing contact with the inner wall of the electronic ignition tube shell, and when the contact system is normally switched on and switched off, one end of the action execution assembly located in the electronic ignition tube shell seals the exhaust channel; in a normal working state, the action execution assembly and the electronic ignition assembly do not act, and the driving system drives the contact plate to move, so that the contact system performs normal opening and closing. Through the multiple independent electronic ignition tubes and the exhaust channels, multiple times of large-current breaking are achieved, and the breaking capacity and the utilization rate of the contactor are improved.

The invention relates to the field of circuit protection, in particular to an excitation fuse with a pressure reduction and exhaust structure, which comprises a shell, and an electronic ignition device, a piston, a conducting bar and a fuse structure which are sequentially positioned in a cavity of the shell, the fuse structure is connected to the conducting bar in parallel, a displacement channel penetrating through the two ends is formed in the fuse structure, and a melt cutter assembly is arranged in the displacement channel in a clearance fit mode; a melt of the fuse structure passes through the displacement channel and is located on a displacement path of the melt cutter assembly. A pressure relief airflow channel is arranged in the shell and communicated with a gap between the melt cutter assembly and the displacement channel. High-temperature and high-pressure gas generated by an electric arc when a melt is disconnected can be decompressed and cooled through the pressure relief gas flow channel, when the gas pressure is high enough after decompression and cooling, the high-pressure gas can be discharged to the outside of the shell through the exhaust port for decompression and cooling, and the strength requirement of the shell is reduced through decompression and cooling.

The application discloses a contact arc extinguishing system and a circuit breaker. The contact arc extinguishing system comprises a contact system, at least one contact unit, each contact unit comprising a main contact mechanism and an arc contact mechanism which are independent of each other and are arranged side by side and spaced apart along a first direction; an arc extinguishing system, at least one arc extinguishing unit, the arc extinguishing unit corresponding to the contact unit one by one, and on the same side of the corresponding main contact mechanism, the arc extinguishing unit and the corresponding arc contact mechanism are spaced apart and electrically connected along a second direction; a connecting assembly, comprising a conductive connecting assembly and a transmission connecting assembly, the conductive connecting assembly connects the main contact mechanism and the arc contact mechanism to form a conductive loop, the transmission connecting assembly extends along the first direction, and the two ends of the transmission connecting assembly are respectively connected in a transmission mode to the main contact mechanism and the arc contact mechanism to control the synchronous action of the main contact mechanism and the arc contact mechanism. The contact arc extinguishing system and the circuit breaker have high arc extinguishing capacity and are aimed at improving the breaking performance of the circuit breaker.

This invention provides a switching device. The switching device includes: a stationary contact and a moving contact assembly. The stationary contact assembly includes a first stationary arc contact, and the moving contact assembly includes a first moving arc contact and a cylinder. The moving contact assembly also includes a pull rod and a second moving arc contact. The pull rod passes through the cylinder to drive the moving contact assembly toward or away from the stationary contact assembly. The second moving arc contact is disposed on the pull rod. The switching device further includes: a piston assembly, including a piston structure and a second stationary arc contact located within the cylinder. The piston structure divides the inner cavity of the cylinder into a first and a second air chamber. The first moving arc contact and a portion of the second stationary arc contact are located in the first air chamber, and the second moving arc contact and another portion of the second stationary arc contact are located in the second air chamber. The moving contact assembly has a nozzle communicating with the first air chamber. This invention solves the problem in the prior art where the opening rate of the switching device is relatively low, affecting its switching capacity.

The application relates to a contact system of a low-voltage circuit breaker, comprising a moving contact system and a static contact system, the moving contact system comprising a plurality of moving contact pieces (3), a moving contact point (4), a contact support (5), a first rotating shaft (7) and a contact spring (8), the moving contact point (4) being arranged on the moving contact piece (3), the plurality of moving contact pieces (3) being connected side by side on the first rotating shaft (7) and being capable of rotating around the first rotating shaft (7), the first rotating shaft (7) being arranged on the contact support (5), and the contact spring (8) being arranged on the contact support (5); the plurality of moving contact pieces (3) comprising middle sequence moving contact pieces and two side moving contact pieces, wherein the middle sequence moving contact pieces are moving contact pieces provided with an arc leading angle (305). Compared with the prior art, the application has the advantages of fast arc leading speed, high breaking capacity, strong structural stability and realization of spring installation positioning adjustment.