23results about How to "Improve electrical life" patented technology

A direct-current double-channel arc extinguishing structure of a circuit breaker comprises an arc extinguishing chamber and is characterized in that a magnetic conductive block is arranged at an arc inlet of the arc extinguishing chamber, and the magnetic conductive block and first magnetic steel and second magnetic steel arranged on the two sides of the arc inlet of the arc extinguishing chamber respectively form a corresponding first arc running channel and a corresponding second arc running channel. And the magnetic field force in the first arc running channel or the second arc running channel can correspondingly enable the corresponding forward electric arc or reverse electric arc generated by the circuit breaker to be subjected to magnetic blow-out force towards the direction of the arc extinguish chamber. According to the arc extinguishing structure, the arc running channel is divided into two strong magnetic channels with opposite magnetic forces by arranging the magnetic conductive block on the arc striking angle. The non-polarity requirement of the high-voltage direct-current circuit breaker in use can be met, and the electrical life, breaking performance, criticality and other performance of the non-polarity high-voltage direct-current circuit breaker can be effectively improved.

The invention discloses a silver-based tin oxide electric contact material and a preparation method thereof, and relates to the technical field of electric contact materials. When the silver-based tin oxide electric contact material is prepared, firstly, a high-temperature solid-phase method is used for doping lithium and cerium to prepare doped tin oxide powder; stannic chloride and copper nitrate are prepared into a fiber membrane through electrostatic spinning, meanwhile, titanium dioxide is grown in situ through nano spraying, and doped stannic oxide fibers are prepared after calcination; the doped tin oxide powder, doped tin oxide fibers and silver powder are subjected to high-energy ball milling and powder mixing and then annealed, and silver-based tin oxide composite powder is obtained; the silver-based tin oxide composite powder is subjected to pre-pressing forming and then subjected to vacuum discharge plasma sintering, and the silver-based tin oxide electric contact material is prepared. The prepared silver-based tin oxide electric contact material has the advantages of being low in resistivity, high in fusion welding resistance, good in arc erosion resistance and easy to machine and shape.

The invention relates to the technical field of contact materials for high-voltage electrical equipment, and particularly discloses a contact material, a preparation method and a contact state monitoring method. The contact material includes a base material; the surface of the substrate material is combined with a porous HEAs framework, and the porous HEAs framework is provided with through holes perpendicular to the substrate material; the through holes are filled with phase change alloy, and the melting point of the phase change alloy is smaller than or equal to 200 DEG C. An integrated double-layer structure is adopted, a substrate material with excellent static electrical performance is combined with a porous HEAs framework-phase change alloy composite surface layer with dynamic response characteristics and self-adjusting performance, the contact material is endowed with the electric arc energy active dissipation, erosion self-inhibition and surface self-repairing capacity, and through doping modification of rare earth elements, the contact material can be subjected to surface self-repairing, so that the service life of the contact material is prolonged, and the service life of the contact material is prolonged. Consumption monitoring of the contact material in the working state is achieved, and the technical bottleneck that an existing contact material lacks active protection, self-adaptive repairing and state monitoring is solved.

The present invention provides an N-pole module of a leakage circuit breaker, including an N-pole mechanism that forms a linkage with an L-pole mechanism, the N-pole mechanism including a support frame that is rotatably arranged on a housing through a rotating shaft I, an N-pole moving contact that is rotatably arranged on the support frame, and an elastic pressure piece that is arranged between the N-pole moving contact and the support frame, the N-pole moving contact is provided with a connecting portion, and the support frame is provided with a limiting portion that forms a limiting match with the connecting portion, and the elastic pressure piece provides the required final pressure for the N-pole moving contact. The N-pole mechanism using this technical solution only needs two rotating shafts during assembly, which simplifies the installation structure, has fewer installation parts, is convenient and quick to install, and improves installation efficiency. The entire structure is more compact, the mechanism has good stability, and the installation occupies less space, freeing up the installation space of the N-pole module, and the N-pole moving contact and the L-pole moving contact can be universal, thereby saving costs, improving the N-pole breaking capacity of the leakage circuit breaker, and being safe and reliable to use.

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 present invention discloses a contactor with an arc splash isolation mechanism, which is mainly composed of a housing, an arc extinguishing chamber cover, a static contact, a moving contact, a central shaft, a rebound spring, an arc extinguishing chamber, a coil and an arc shield; the arc shield is in the shape of an inverted bowl; an opening is left at the center of the arc shield for the central shaft to pass through; the upper top surface of the arc shield is fixedly connected to the moving contact, and the lower opening of the arc shield is covered on the outside of the rebound spring. The present invention adds an arc shield to isolate arc splashes on the basis of the existing contactor, avoiding the accumulation of arc splashes with the increase of the number of load switching of the contactor, thereby preventing the deterioration of the breaking capacity of the contactor, and avoiding the obstruction of the action of the moving parts of the product, thereby achieving the purpose of improving the electrical life and product reliability.

The application discloses an intelligent environment-friendly inflatable quick switch cabinet and a control method thereof, which comprises a gas tank and a vacuum circuit breaker pole arranged in the gas tank, and an insulation pull rod is arranged on the vacuum circuit breaker pole; the opening and closing of an arc extinguishing chamber contact is controlled through the insulation pull rod, so that the circuit is realized; a modular electromagnetic repulsion driving unit is mounted on the outer wall of the gas tank, and the modular electromagnetic repulsion driving unit is connected with the insulation pull rod through an output shaft penetrating through the gas tank; a capacitor group is connected with a coil, which is used for generating electromagnetic repulsion to push a repulsion disc after being electrified; the repulsion disc is rigidly connected with the output shaft, and is used for moving forward and backward under the action of the electromagnetic repulsion; the electromagnetic repulsion driving unit is isolated from the inside of the gas tank through the modular external hanging type setting, the physical breakpoint of the shell mounting interface blocks the conduction of high-frequency strain waves to the inside of the gas tank, the micro cracks of the insulation supporting part caused by mechanical impact in the environment-friendly gas environment are avoided, and the long-term insulation safety under the low dielectric strength is ensured.

The ground power supply system of the electric vehicle comprises a ground power supply module and a power collecting shoe. The ground power supply module is arranged between two steel rails and comprises a ground power supply positive module and a negative return contact rail. The power collecting shoe is arranged at the bottom of the electric vehicle and comprises a positive brush and a negative brush. The positive brush is in sliding contact with the ground power supply positive module, and the negative brush is in sliding contact with the negative return contact rail, so that the ground power supply module supplies power to the electric vehicle through the power collecting shoe. The negative return contact rail is grounded, so that the stray current generated when the power supply module returns to negative is limited in the ground power supply module, thereby avoiding the electric erosion damage of the stray current to the tie and the steel rail. The ground power supply system does not generate stray current to the outside through the negative module, and protects the railway facilities from being damaged.

The present invention discloses a double-resistance transition circuit of a vacuum on-load tap changer and a voltage regulation method. The transition circuit comprises: a first main contact MC1, a second main contact MC2, a first auxiliary vacuum contact V1, a second auxiliary vacuum contact V3, a main vacuum contact V2, a first switch Z1, a second switch Z2, a first transition resistor R1 and a second transition resistor R2. The present invention designs two auxiliary vacuum contact branches, and the task of cutting off the circulating current is taken turns by two auxiliary vacuum contacts. The switching procedure is symmetrical, so that the burning of the two auxiliary vacuum contacts is completely consistent. Compared with the current transition circuit of "single main vacuum contact, single auxiliary vacuum contact" structure, the switching capacity of the main vacuum contact and the auxiliary vacuum contact can be balanced. At the same time, two transition resistors are designed to work in rotation to solve the problem that the temperature of the transition resistor is too high due to the heating of the single transition resistor, resulting in the decomposition and gas production of transformer oil and the reduction of insulation performance, thereby improving the electrical life of the entire vacuum on-load tap changer.

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 present invention provides an electrical component, comprising a shell, a contact component arranged in the shell, and a limiting structure fixed relatively to the shell, wherein the contact component comprises: a static contact, a moving contact, and a contact support portion providing support for the moving contact, the limiting structure can contact or separate from the moving contact, after the moving contact and the static contact are disconnected, the moving contact moves linearly for a distance driven by the contact support portion and then contacts the limiting structure, and rotates under the joint action of the limiting structure and the contact support, the present invention can increase the contact opening distance of the electrical component with a single breakpoint structure, and enhance the arc extinguishing capability of the electrical component.

The invention discloses a large-current high-breaking plug-in circuit breaker, comprising a moving contact, a stationary contact, an arc extinguishing chamber, an arc-strike assembly and an arc-guiding acceleration structure arranged on a shell structure. The arc-strike assembly is arranged on both sides of an arc-entry opening in the length direction of the arc-extinguishing chamber. The arc-guiding acceleration structure comprises a magnetizing assembly arranged on both sides of the arc-entry opening in the width direction, and an arc-guiding channel surrounding the moving and stationary contacts, which is formed by connecting the magnetizing assembly, the arc-strike assembly and the shell structure. The cross-sectional width of the arc-guiding channel gradually decreases from the arc-entry opening to the moving contact side. The arc is further accelerated to move in the direction of the arc-entry opening by forming an air pressure difference in the arc-guiding channel and by the magnetic blowing effect of the magnetizing assembly on the arc. The arc-strike efficiency is high and the cooling of the arc can be accelerated by the combined effect of the arc-guiding channel and the magnetizing assembly, thereby avoiding the burning of other parts such as the contacts by the arc, and improving the electrical life and breaking capacity of the circuit breaker.

The invention discloses an arc extinguishing system and an electric appliance switch thereof, and belongs to the technical field of electric appliance equipment, the arc extinguishing system comprises a front arc extinguishing grid plate group and a rear arc extinguishing grid plate group which are connected in parallel, and the front arc extinguishing grid plate group is connected with a static arc striking grid plate and a movable arc striking grid plate; when one rear arc extinguishing grid plate group is arranged, two ends of the rear arc extinguishing grid plate group are respectively connected with the static arc striking grid plate and the movable arc striking grid plate, and when multiple rear arc extinguishing grid plate groups are arranged, one end of the first group is connected with the static arc striking grid plate, and one end of the second group is connected with the movable arc striking grid plate; when a plurality of groups of rear arc extinguishing grid sheet groups are arranged, the arc extinguishing grid sheet structure also comprises arc striking grid sheet groups, the front ends of the arc striking grid sheet groups are attached and inserted among the arc extinguishing grid sheets of the front arc extinguishing grid sheet group, the rear ends of the arc striking grid sheet groups are respectively connected with the end parts of different rear arc extinguishing grid sheet groups, and the different rear arc extinguishing grid sheet groups are connected in series through the arc striking grid sheet groups. According to the invention, the intervention time of the arc extinguishing grid sheets can be shortened, the initial arc energy is greatly reduced, the duration of the metal phase arc is reduced, the number of the arc extinguishing grid sheets can be increased, and the breaking capacity and the electrical life of the electric appliance switch are greatly improved.

The utility model relates to an energy storage system, and provides an energy storage power supply system control circuit and an energy storage power supply system high-voltage box. The energy storage power supply system control circuit comprises a low-voltage control loop and a high-voltage power supply loop, the high-voltage power supply loop comprises a positive output loop, a negative output loop and a circuit breaker arranged on the positive output loop and the negative output loop, the positive output loop is connected with a positive electrode pre-charging loop in parallel, and a first end of a main contact of a pre-charging positive contactor is electrically connected with a first input end of the circuit breaker; the second end of the main contact is electrically connected with the first output end of the circuit breaker through the pre-charging resistor, and the coil is connected with protection equipment; the negative output loop is connected in parallel with a negative electrode pre-charging loop, a first end of a main contact of the pre-charging negative contactor is electrically connected with a second input end of the circuit breaker, a second end of the main contact is electrically connected with a second output end of the circuit breaker, and a coil of the pre-charging negative contactor is connected with protection equipment. The control circuit of the energy storage power supply system can meet the design requirements of high voltage and large current, has the function of a pre-charging loop, and has the advantages of safety, reliability and the like.

A clamping type contact system comprises a moving contact assembly and a static contact, the static contact is provided with a static contact main contact part and a static contact second breakdown part, and the moving contact assembly is provided with a moving contact assembly main contact part and a moving contact second breakdown part at positions corresponding to the static contact main contact part and the static contact second breakdown part. In the process that the moving contact assembly rotates to leave the static contact, the moving contact assembly main contact part and the static contact main contact part are separated first, and then along with rotation of the moving contact assembly, the distance between the moving contact assembly main contact part and the static contact main contact part becomes larger and larger. And the distance between the second breakdown part of the moving contact and the second breakdown part of the static contact becomes smaller and smaller. According to the moving contact system, the second breakdown points are arranged on the moving contact and the static contact, so that the electric arc is quickly led out from the main contact part, the ablation of the moving contact and the static contact is reduced, and the electrical service life of the switch is prolonged.

The invention belongs to the technical field of power supply management, and particularly provides an alternating current and direct current power supply isolated output switching device, which comprises a power supply input and preprocessing module used for accessing an alternating current main power supply and a direct current standby power supply and performing preprocessing protection on the two power supplies respectively; the power supply detection and control module is used for acquiring electrical parameters of the alternating-current main power supply and the direct-current standby power supply in real time, judging a power supply state of the power supply according to an acquisition result and outputting a control signal; the relay isolation switching module comprises two relays respectively corresponding to the main power supply branch and the standby power supply branch, and realizes physical isolation and automatic switching of the AC / DC power supply based on the control signal; the output adaptation and protection module is used for providing a corresponding output branch according to the load type and protecting an output power supply; wherein the two relays adopt an interlocking design to ensure that the two relays are not conducted at the same time.

The present invention discloses a three-state micro-rotation positioning mechanism, including a housing, a motor, a shaft cylinder, and a load bracket. The housing is a cylindrical barrel-shaped structure with an opening at the top, a through hole at the center of the bottom, fixing ears on the left and right sides, and a wire outlet hole on the front side. The motor is a rotary motor with a stator inside an outer rotor, fixed inside a closed space inside the housing, and the rotation axis of the rotor coincides with the light-transmitting axis. The shaft cylinder is a hollow cylindrical structure, which is a part of the motor rotor. Threaded holes are designed around the top, and there are two limiting protrusions at the bottom. The load bracket is a flange-shaped structure, and screw holes are arranged on the surrounding raised parts. The present invention has the characteristics of small size, light weight, low power consumption, and fast switching, and can achieve state switching with lower power consumption in a smaller space.

The present invention discloses a single-resistance alternating transition circuit and a voltage regulation method for a vacuum on-load tap changer. The transition circuit comprises: a first main contact MC1, a second main contact MC2, a first auxiliary vacuum contact V1, a second auxiliary vacuum contact V2, a main vacuum contact V3, a first switch Z1, a second switch Z2 and a transition resistor R. The present invention designs two auxiliary vacuum contact branches, and the task of cutting off the circulating current is taken turns by the two auxiliary vacuum contacts. The switching procedure is symmetrical, so that the burning of the two transition vacuum contacts is completely consistent, which reduces the switching task of the auxiliary vacuum contact. Compared with the current transition circuit with a "single main vacuum contact and a single auxiliary vacuum contact" structure, the switching task of only one auxiliary vacuum contact is shared, the switching capacity of the main vacuum contact and the auxiliary vacuum contact can be balanced, and the electrical life of the entire vacuum on-load tap changer is improved.

This invention discloses a rotary multi-contact isolating switch, comprising an operating part, a positioning part, a switching part, and a driving part. The operating part includes an upper housing, a handle, and a rotating shaft. The positioning part includes a positioning housing, a positioning gear, and a telescopic positioning assembly. The positioning gear is fixed to the bottom end of the rotating shaft, and the telescopic positioning assembly cooperates with the positioning gear to achieve position locking. The switching part includes a lower housing, a stationary contact, and a moving contact assembly, with the moving contact assembly slidably installed within the lower housing. The driving part includes a driven ring and a connecting shaft. The connecting shaft transmits the rotational motion of the rotating shaft to the driven ring, which drives the moving contact assembly to quickly disconnect from the stationary contact. This invention achieves accelerated disconnection of the moving and stationary contacts through the cooperation of the driven ring and the contact support block, effectively shortening the arcing time. The moving contact assembly adopts a double-spring structure, separating the contact pressure of the raised driven wheel from the contact pressure of the contact point, improving the contact stability and vibration resistance reliability during long-term operation. The overall structure is stable and highly reliable.

The present invention discloses a reciprocating transition circuit and voltage regulation method for an on-load tap changer, the circuit comprising: a first main through-current switch, a second main through-current switch, a first switch element, a second switch element, a third switch element, a fourth switch element, a first transition resistor and a second transition resistor; the second end of the first switch element, the first end of the second switch element and the first end of the first transition resistor are connected; the second end of the third switch element, the first end of the fourth switch element and the first end of the second transition resistor are connected; the second end of the first main through-current switch, the second end of the second switch element, the second end of the first transition resistor, the second end of the second main through-current switch, the second end of the fourth switch element and the second end of the second transition resistor are all used to connect to the neutral point lead-out terminal of the on-load tap changer. The present invention realizes on-load switching and voltage regulation entirely by switch elements and transition resistors; and no mechanical track-changing mechanism is required.

The utility model provides a non-polarity direct-current arc magnetic drive structure using bar magnets. The non-polarity direct-current arc magnetic drive structure comprises a first contact, a second contact, a first bar magnet, a second bar magnet, a first magnetizer, a second magnetizer, a first insulating flash barrier and a second insulating flash barrier. A first insulating flash barrier, a first bar-shaped magnet, a first magnetizer, a second insulating flash barrier, a second bar-shaped magnet and a second magnetizer are arranged on the two sides of the first contact and the two sides of the second contact respectively, and the first insulating flash barrier, the first bar-shaped magnet and the first concentrating flux plate are sequentially arranged in the direction away from the movable contact and the static contact. And the second insulating flash barrier, the second bar-shaped magnet and the second magnetic conductive plate are sequentially arranged along the direction far away from the movable contact and the static contact. The purpose that electric arcs in any current direction can move towards the opening direction of the movable contact and the static contact is achieved, and the device can be used for development of high-performance low-voltage switching devices.

The invention provides a thyristor mechanical hybrid on-load tap-changer transition circuit. Each phase of the circuit comprises a pair of anti-parallel thyristor modules VT and a corresponding trigger electrode switch G; the switch comprises two main on-off contacts A and D and corresponding auxiliary contacts A 'and D'. Comprising two transition contacts B and C and corresponding auxiliary contacts B'and C '. The current-limiting circuit comprises two current-limiting resistors, namely an n-side current-limiting resistor R and an (n + 1)-side current-limiting resistor R. In the switching process, zero-crossing natural turn-off of the thyristor module is used for realizing non-switching of each transition branch, ablation of a mechanical contact and pollution of insulating oil can be avoided, non-arc switching is realized on the basis of increasing limited cost, and the electrical life of the on-load tap-changer is greatly prolonged.

The invention relates to the technical field of power equipment detection, in particular to a controlled terminal full life cycle health state reconstruction method, which comprises the following steps: S1, designing a controlled terminal adaptive detection device controller; s2, designing and realizing a self-adaptive unit module; s3, designing a state monitoring and display system; s4, state monitoring and display implementation; and S5, operation and management in practical application. By designing and applying the self-adaptive detection device controller, accurate evaluation and efficient fault diagnosis of the health state of the controlled terminal (including the pole-mounted switch and the FTU feeder terminal) are achieved, the detection method refers to the non-power-failure detection principle, the adverse effect on the power supply reliability in the traditional detection process is avoided, and the detection accuracy is improved. And mechanical loss caused by multiple operation of the circuit breaker is reduced, so that the mechanical and electrical service lives of equipment are prolonged.