437results about How to "Improve arc extinguishing performance" patented technology

The invention discloses a thunder-lightening induced solid-phase arc-extinguishing lightning arrester. The thunder-lightening induced solid-phase arc-extinguishing lightning arrester mainly consists of a lightning arrester shell, an arc-extinguishing rotary table, an electric conduction metal plate, a starting rod, a clamping rod, an induction coil, an arc-extinguishing barrel and a counting pointer; the arc-extinguishing rotary table is arranged inside the lightning arrester shell, and a flat spiral spring for pushing the arc-extinguishing rotary table to rotate is arranged at the central position of the arc-extinguishing rotary table; the electric conduction metal plate is arranged at the upper part of the arc-extinguishing rotary table; the arc-extinguishing rotary table is provided with a plurality of arc-extinguishing gas pills in the peripheral direction; one side of each arc-extinguishing gas pill is provided with a trigger electrode and a groove respectively, one end of each trigger electrode is connected with one of trigger ends of the corresponding arc-extinguishing gas pill through a lead, and the other ends of the trigger electrodes extend out of the edge of the arc-extinguishing rotary table; and the other of the trigger ends of the corresponding arc-extinguishing gas pill is connected with the electric conduction metal plate through a lead. The thunder-lightening induced solid-phase arc-extinguishing lightning arrester is simple in structure, reasonable in design, high in arc-extinguishing ability and stable and reliable to work, and the arc-extinguishing gas pills are changed quickly and conveniently.

The invention discloses a box type automatic double-power-supply transfer switch which comprises a box body, three main power supply binding posts which are arranged on the box body, three spare power supply binding posts, three load binding posts and a power supply transferring mechanism, wherein the power supply transferring mechanism comprises a main transferring shaft and an auxiliary transferring shaft, three main switching contact knifes which are used for switching the main power supply binding posts are arranged on the main transferring shaft, three auxiliary switching contact knifes which are used for switching the auxiliary power supply binding posts are arranged on the auxiliary transferring shaft, and the main transferring shaft and the auxiliary transferring shaft are linked by an interlocking interactive mechanism. The invention transfers double power supplies by linking the two shafts and has the advantages of compact structure and small volume.

The invention relates to a fuse and a production process thereof, wherein the fuse comprises a glass-ceramic substrate, a fusible metallic conductor built in the glass-ceramic substrate, a thermal-protective coating arranged on at least one face of the fusible metallic conductor, and a terminal electrode arranged on the glass-ceramic substrate, and the thermal-protective coating is made of a porous glass-ceramic composite material. In the manufacture process, an ultraviolet curing technology is utilized, and the fuse is produced through low temperature cofiring after UV (ultraviolet) curing. The thermal-protective coating has low heat conductivity, so that the radiating of the metallic conductor is effectively reduced, and the required resistance is much smaller at the fuse demand of certain current intensity. The manufacture process provided by the invention is simple, each coating of the fuse is combined compactly, and the fuse has outstanding arc extinction performance and higher stability. The surface- mounted fuse in the structure not only has high reliable fusing property, but also has the characteristics of low resistance and low power consumption, therefore the energy consumption in the circuit can be reduced, energy sources are saved, and the fuse can be widely used in the circuit protection of mini portable electronic products.

The invention relates to a high voltage direct current breaker with multiple fractures and a tandem type. The breaker comprises a multi-fracture breaker, an oscillation loop and a dissipative element. The multi-fracture breaker includes a plurality of single-phase breakers and fractures of all the single-phase breaker are in series connection through connection buses; the multi-fracture breaker is respectively in parallel connection with the oscillation loop and the dissipative element through the connection buses; and a fracture of each the single-phase breaker is respectively in parallel connection with an RC equalizer circuit. According to the invention, fractures of a plurality of single-phase breakers are in series connection so as to form a multi-fracture tandem structure; effects of high drop-out voltage, heavy drop-put current and short drop-out time and the like are realized; and demands of ultra-high voltage and extra-high voltage direct current power transmission projects can be completely met. In addition, the oscillation loop in the invention is used for generating oscillation currents; the dissipative element is used for absorbing line energy and restricting overvoltages after currents are switched off; and the RC damping circuit is used for improving equalizing voltages between fractures of all the single-phase breakers.

The invention relate to breaker, especially to super high-voltage circuit breaker in use for GIS. The disclosed breaker includes breaking contactor mechanism, and operating mechanism for switching on / off resistances, and controlling action of breaking contactor mechanism. Through pull rod and regulating lever, one set of operating mechanism can control two sets of breaking contactor mechanism since technique of adjusting compression spring for moving contactor is utilized. The invention possesses breaking function at double speed, reduces kinetic resistance of moving contactor, and quickens breaking speed. Stepped breaking technique adopted in the invention lowers over voltage of operation greatly, as well as increases rated capacity and breaking capacity greatly. The invention also reduces cost of equipment and difficulties for manufacturing the disclosed breaker.

The invention provides a large-current magnetic latching relay, a movable contact spring of the large-current magnetic latching relay, and a contact assembly of the large-current magnetic latching relay. The large-current magnetic latching relay comprises the contact assembly, an electromagnetic assembly, an armature assembly and a pushing clamp, and under the magnetic attraction action of permanent magnet steel inside the armature assembly, the contact assembly keeps in the normally open state or in the normally closed state; the contact assembly is triggered by pulse electric signals to be switched between the normally open state and the normally closed state, so that the electromagnetic assembly drives the armature assembly to drive the pushing clamp to shift, and the contact assembly is switched between the normally open state and the normally closed state through shifting of the pushing clamp. The movable contact spring of the large-current magnetic latching relay is made of elastic conductive materials and is fixedly provided with at least two movable contacts, the movable contact spring is provided with a fixed first end portion and a second end portion capable of elastically swinging, the movable contacts are fixed to the second end portion and are electrically connected through the movable contact spring, and the second end portion of the movable contact spring is driven by the pushing clamp to swing.

A dielectric insulation medium including a hydrofluoro monoether, the hydrofluoro monoether containing at least three carbon atoms. The insulation medium according has high insulation capabilities, in particular a high dielectric strength, and at the same time a low GWP. The invention further includes an insulation medium which is chemically and thermally stable also at temperatures above 140° C., which is non-toxic or has a low toxicity level, and which in addition is non-corrosive and non-explosive.

The invention discloses an electric arc compressed arc-extinguishing lightning protection gap device. The electric arc compressed arc-extinguishing lightning protection gap device comprises a lightning protection device main body and an arc-striking electrode, wherein the arc-striking electrode is fixedly arranged at one end of the lightning protection device main body, and the other end of the lightning protection device main body is fixedly arranged on a cross arm or at one end of an insulator chain through a connecting armor clamp; the lightning protection device main body is provided with an arc-extinguishing path which consists of a plurality of arc-extinguishing passages and is in Z-shaped cyclic arrangement; an arc-extinguishing tube at the inlet of the first arc-extinguishing passage of the arc-extinguishing path is connected with the arc-striking electrode through an arc-guiding rod, and an arc-extinguishing tube at the outlet of the final arc-extinguishing passage is connected with the connecting armor clamp, wherein a three-way tube is arranged at the joint of every two adjacent arc-extinguishing passages; an arc-guiding electrode is arranged at each of two ends of the three-way tube respectively; one end of each of the arc-guiding electrodes stretches into the three-way tube, and the other ends of the arc-guiding electrodes are connected with the adjacent arc-extinguishing tube in a direct contact manner or through leads. The electric arc compressed arc-extinguishing lightning protection gap device is simple in structure, reasonable in design, high in arc-extinguishing capacity and stable and reliable to operate.

The invention relates to a direct current quick breaker, in particular to a direct current quick breaker with high requirement for short circuit breaking current. The breaker comprises a breaker body and an arc extinguish chamber, wherein the arc extinguish chamber comprises a pair of insulated shells and an arcing ring; the cavity of the arc extinguish chamber comprises a metal grid, an insulated grid and a transverse clapboard; the metal grid and the insulated grid are positioned in the middle of the arc extinguish chamber; the transverse clapboard is positioned on the upper part of the arc extinguish chamber; one side, which faces the bottom of the arc extinguish chamber, of the metal grid is a lower side provided with a notch having a downward opening; and two types of metal grids, namely a straight-panel metal grid and a U-shaped metal grid are provided. The breaker has the advantages of quickly establishing arc voltage, reducing the resistance of electric arc entering the arc extinguish chamber, lengthening electric arc, shortening arcing time, enhancing arc extinguishing capability of the arc extinguish chamber, along with simple structure, small overall dimension, convenient assembly and maintenance and the like.

The invention provides an arc extinguishing structure applied to a molded case circuit breaker and the molded case circuit breaker. The arc extinguishing structure includes: an arc striking system, a magnetic blowing system, an insulating plate system and an arc extinguishing device; the magnetic blowing system includes a core system and a guide Magnetic system; the left and right magnetic guide plates are placed on the left and right sides of the arc extinguishing chamber casing, forming a magnetic field space between the left and right magnetic guide plates. Therefore, the arc extinguishing chamber is placed in the magnetic field space, and the magnetic field space The generated magnetic force acts on the arc entering the arc extinguishing chamber, accelerating the arc to move toward the outlet of the arc extinguishing chamber. The advantages are: the iron core and the left and right magnetic guide plates form a magnetic blowing system. The magnetic blowing system generates a magnetic field with the magnetic force lines inward. This magnetic field accelerates the arc and enters the arc extinguishing device through the arc striking system. The arc is elongated, and the arc-breaker is covered on both sides of the arc-extinguishing grid. The arc-breaker decomposes a large amount of gas under the burning of the arc, and the gas medium enhances the ability to deionize the arc. As a result, the arc extinguishing effect is comprehensively improved.

The invention discloses a circuit breaker as well as an arc extinguishing chamber and a nozzle thereof. The nozzle comprises a casing-like nozzle body, two ports of the nozzle body are respectively a gas inlet for charging arc extinguishing gas and a gas outlet for jetting the arc extinguishing gas, a throat narrower than the gas inlet and the gas outlet is formed in the nozzle body, the inner wall of the throat is an annular necking step convexly formed on the inner wall of the nozzle body, the necking step is provided with a bridge-type airflow hole, the inlet orifice of the airflow hole is located on the annular end face of the necking step facing the gas inlet, the outlet orifice of the airflow hole is located on the inner wall of the necking step, and the airflow hole is communicated with the throat and the gas inlet. The airflow hole in the necking step achieves the effect of enhancing the circulation performance of the throat, and at the moment when a static arc contact is separated from the throat, the arc extinguishing gas in the inlet of the nozzle can act on the end of the static arc contact via the airflow hole to enhance the blowing strength at the moment when the throat is separated from the static arc contact, so that the arc extinguishing effect is enhanced.

The invention discloses an electric energy management comprehensive monitoring system, and belongs to the technical field of power utilization monitoring. The electric energy management comprehensivemonitoring system comprises a user power utilization monitoring unit, wherein an output end of the user power utilization monitoring unit is electrically connected with a power distribution station monitoring unit, the power distribution station monitoring unit comprises a draught fan control module, an air conditioner control module, a gas monitoring unit, a sound-light alarm unit, a water levelmonitoring unit and an ultrasonic water level monitoring unit, and the fan control module is bidirectionally and electrically connected with the air conditioner control module. The starting, stoppingand running states of a transformer temperature fan are monitored in real time by monitoring the temperature in a transformer, and the air-conditioning temperature can be automatically adjusted, so that the temperature control and adjustment capacity of a transformer substation can be remarkably improved, the temperature of the transformer substation does not need to be controlled through manual inspection, the electric energy management comprehensive monitoring system can automatically adapt to the internal power of the transformer substation to change the heat dissipation strategy, improvesthe monitoring and management capability of the temperature of the transformer substation, remarkably reduces the manpower cost, and improves the regulation and control safety and stability.

The invention discloses a permanent magnet opening and closing type DC intelligent circuit breaker, comprising a base, an incoming busbar, a dynamic contact electrically connected with the incoming busbar, a dynamic contact supporting part, a static contact, an outgoing busbar electrically connected with the static contact, a static contact supporting part, an operating mechanism used for drivingthe dynamic contact to open and close and an arc quenching mechanism used for quenching arc; wherein, the arc quenching mechanism comprises an arcing shield and an arcing ring; the operating mechanism comprises a permanent magnet type electromagnetic actuating mechanism, an insulating driving rod and a clamping rod; the permanent magnet type electromagnetic actuating mechanism is provided with a telescopic actuating rod and a solenoid coil; one end of the clamping rod is connected with the middle of the dynamic contact supporting part in a rotary manner by a rotating shaft; the other end of the clamping rod is provided with a waist hole and is connected with one end of the insulating driving rod by a rotating shaft which passes through the waist hole; the other end of the insulating driving rod is fixedly connected with the actuating rod. The circuit breaker has simplified structure, fast breaking speed and few mechanical failure sources and can stably and reliably run for a long time.

A super-capacity lithium ion battery pack with a heat-transfer oil circulating radiating device mainly comprises a battery pack box body, a radiating pipe, a fin, lithium ion batteries and an oil conservator, wherein the battery pack box body adopts a full-oil charge seal type structure; the metal bellows expansion oil conservator is arranged at the top of the box body and is communicated with the battery pack box body through a guide pipe; clamping grooves are uniformly, internally and correspondingly formed in the top and bottom of the battery pack box body; each lithium ion battery is clamped between the clamping grooves which correspond up and down to keep vertical and stable; the fin is connected with the periphery of the battery pack box body; the connectors of the radiating pipe are respectively arranged at the upper and the lower end of the fin and communicated with the battery pack box body; under the heating, the heat-transfer oil forms a natural circulation convection in the battery pack box body. The lithium ion battery pack has a simple structure; the heat-transfer oil can serve as not only a cooling medium, but also an insulator, can continuously flow in the closed battery pack box body and the radiating pipe, without being corroded by moisture, is high in radiating, and can ensure the normal working of the super-capacity lithium ion battery pack.

The invention discloses a double-trigger air-blast arc-extinguishing lighting protection device. The double-trigger air-blast arc-quenching lighting protection device mainly comprises a lighting protector shell, an arc starting rod, an induction coil, an arc-extinguishing barrel and an upper cover, wherein a triggering loop I and a triggering loop II are respectively arranged on two internal sidesof the lighting protector shell, and a trigger delay element is arranged on the triggering loop II. The trigger delay element is a capacitor, or an inductor or a spark gap. When the trigger delay element is the capacitor, the capacitor is parallelly connected with an arc-extinguishing air pellet II at an air pellet triggering position II and is connected in the triggering loop II; when the trigger delay element is the inductor or the spark gap, the inductor or the spark gap is serially connected with the arc-extinguishing air pellet II at the air pellet triggering position II and is connectedin the triggering loop II. Compared with a single-trigger mode, a double-trigger mode of the double-trigger air-blast arc-extinguishing lighting protection device has the advantages that the amount of the arc-extinguishing pellets is increased, arc-extinguishing energy is enlarged, asymmetry of electric arc energy and arc-extinguishing energy is realized, and effective arc extinguishing is guaranteed.

The invention relates to a method for detecting leakage of insulating oil in an on-load tapping switch of a transformer by using SF6 gas, which comprises the following steps: firstly, calculating volume of the SF6 gas in the insulating oil added to the on-load tapping switch; adding the SF6 gas to the insulating oil for the on-load tapping switch according to a calculated value; selecting an oil sample of transformer body oil; and using a gas chromatograph to carry out chromatographic analysis for the selected oil sample of the transformer body oil. If the SF6 gas is detected out, which proves that the on-load tapping switch leaks the insulating oil; and if no SF6 gas is detected out, which proves that the on-load tapping switch does not leak the insulating oil. The method determines the problem of oil leakage of the on-load tapping switch by using an indirect method to avoid occurrence of misjudgment accidents, can judge failure property and approximate position inside equipment to provide reliable scientific basis for maintenance work, reduce unplanned power failure and limited loading time of a transformer, greatly reduce economic expenditure on manpower, physical resources and materials, and reduce labor intensity, insecurity factors and the like.

The invention discloses an arc-extinguishing load switch which comprises a substrate and a three-phase switch assembly, wherein each-phase switch assembly is provided with an air cylinder and comprises an upper static contact assembly, a lower static contact assembly, a moving contact and a grounding assembly, wherein the lower part of the moving contact can be in conductive contact with the lower static contact assembly and is pivoted with the air cylinder to rotate among a closing position, an opening position and a grounding position. A part of the air cylinder corresponding to a part between the closing position and the grounding position is a sealed part; the moving contact is fixedly provided with a rotating piston; the rotating piston is provided with a through blowing nozzle; the sealed part is matched with the rotating piston to divide the air cylinder into a closed compression cavity and a release cavity; and when the moving contact rotates from the closing position to the opening position, gas in the compression cavity is compressed by the rotating piston firstly, and then is blown to an upper static contact for arc extinguishing. The arc-extinguishing load switch has the advantages of high arc-extinguishing capacity.

The invention relates to ternary silver alloy of silver, copper and cerium, in particular to breaking contact and sliding contact alloy material of medium and small-load low-voltage electrical appliances. The alloy material contains 3 percent to 10 percent of Cu, 0.3 percent to 0.7 percent of Ce and the rest percent of Ag according to weight. The material has good electrical contact performance and long service life and can respectively serve as the breaking contact and sliding contact alloy material so as to be applied to the medium and small-load low-voltage electrical appliances.

The invention discloses a device and a method for cutting off short-circuit current. The device can improve the arc extinguishing performance of a circuit breaker, improve the cut-off capacity of the circuit breaker and shorten the arc extinguishing time of the circuit breaker. The device comprises the circuit breaker, a high-voltage switch and a magnetic saturation reactor. The high-voltage switch is connected in parallel with the magnetic saturation reactor and then connected in series with the circuit breaker. The device for cutting off the short-circuit current is connected in series with a power supply loop. When a power system runs normally, the high-voltage switch of the device for cutting off the short-circuit current is closed, and the circuit breaker is also closed. When the power system runs normally, the device for cutting off the short-circuit current has zero loss. When the power system is short-circuited and the short-circuit current needs to be cut off, the high-voltage switch of the device is first tripped, and the magnetic saturation reactor is connected into a short-circuit current loop. The magnetic saturation reactor reduces the current values of the short-circuit current in sections surrounding a zero crossing point and prolongs the time of the current in low-current sections surrounding the zero crossing point. Then the circuit breaker is tripped to cut off the short-circuit current.

The invention discloses a self-energy arc extinguishing chamber for increasing thermal expansion effect. The self-energy arc extinguishing chamber comprises a dynamic arc contact, an insulating cylinder, a static contact seat and a dynamic arc contact seat, wherein the static contact seat is arranged at the upper end of the insulating cylinder and is used for installing an upper arc contact and an upper arc striking ring; the dynamic arc contact seat is arranged at the lower end of the insulating cylinder and is used for installing a lower arc striking ring and a lower arc contact; a thermal expansion chamber is formed in the insulating cylinder; a fracture of the arc extinguishing chamber is formed at two ends of the insulating cylinder; the dynamic arc contact penetrates through the insulating cylinder, the upper arc striking ring and the lower arc striking ring along the axial direction, and makes contact with the upper arc contact and the lower arc contact at a switching in position; an upper arc striking surface and a lower arc striking surface are respectively formed on the adjacent surfaces, in the fracture direction, of the upper arc striking ring and the lower arc striking ring distributed at two ends of the fracture; a plurality of through grooves are formed on the upper arc striking surface and / or the lower arc striking surface along the radial direction; the notches of the through grooves are communicated with the inner rings of the arc striking rings; the tails of the through grooves are not communicated with the outer ring edges of the arc striking rings; the connection straight lines between the notches and the tails do not pass through the centers of the arc striking rings; and the inclination directions of the connection straight lines are consistent.

The invention relates to a combined magnetic-quenching device. The device comprises two fixed contacts, an insulation bracket, permanent magnet steel, a magnetic conduction board, a gate-chip type arc-extinguishing chamber and a moving contact. The combined magnetic-quenching device can fulfill the aims of speeding up an arc-extinguishing speed and improving the arc-extinguishing capacity in a simplest and easiest processing mode on the premise of not increasing the overall dimension of a breaker and reserving the structural form of a conventional breaker.

The invention discloses a compressed solid-phase synthesis arc extinguishing surge protection device. The compressed solid-phase synthesis arc extinguishing surge protection device is divided to two parts of the lower solid-phase arc extinguishing part and the upper compressed arc extinguishing multi-space channel. The surge protection device comprises an arc extinguishing surge protection device body. The arc extinguishing surge protection device body is provided with a hollow arc extinguishing cylinder. A housing mounted on the arc extinguishing surge protection device body is fixedly installed with the arc extinguishing cylinder. The housing is covered by an upper cover mounted on the housing. The interior of the housing is provided with a circular ring and a circular plate, and the circular ring and the circular plate are nested together. Each of the circular ring and the circular plate is provided with an arc extinguishing gas pill around the outside of the circumference. The upper end of a starting rod is connected with a Z-shaped compressed arc extinguishing channel. The Z-shaped compressed arc extinguishing channel is orderly arranged by a compressed tube and a T-shaped tube according to certain mode, so the surge protection device is capable of effectively treating superposition thunder and repletion thunder.

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

The invention discloses a dropping type fuse, comprising a fuse holder, an upper contact seat, a lower contact seat, a switching on / off mechanism, an isolator, an upper wiring terminal, a lower wiring terminal, an upper insert and a lower insert. The upper end of the fuse holder is in opening / closing connection with the upper contact seat, the lower end of the same is rotatably connected with the lower contact seat, the fuse holder comprises a fuse pipe, a lever mechanism arranged on the upper part of the fuse pipe, an upper contact arranged on the upper end of the lever mechanism, a lower connection sleeve sleeved on the lower part of the fuse pipe and a lower contact connected on the lower connection sleeve, the upper contact seat is connected with the upper wiring terminal, the switching on / off mechanism is connected with the upper insert, the upper contact seat is movably connected with the switching on / off mechanism through a linkage pin, the upper contact comprises an upper bracket, a spring seat, a guide rod, an upper contact seat body, and a pressure spring, and the switching on / off mechanism comprises a tripping device, a locking device, a resetting device and a guiding structure. The invention ensures that the switching on / off operations is more labor-saving through the measures of changing the motion mode of the upper contact seat, additionally arranging the switching on / off mechanism and the like.

The invention provides a high altitude indoor high voltage alternating current combined vacuum circuit breaker. The high altitude indoor high voltage alternating current combined vacuum circuit breaker comprises a chassis, three sets of wiring boards and conducting bases are installed at the two sides of the chassis in an insulating mode respectively, the wiring boards are electrically connected to incoming line cables, the conducting bases are electrically connected with outgoing line cables, a touch knife, a wall penetrating polar column and a vacuum arc extinguish chamber are arranged between each set of wiring board and the conducting base in sequence, the chassis is further provided with an operating mechanism, first insulating pull rods are arranged between the operating mechanism and the touch knives, the operating mechanism is further provided with a second insulating pull rod in a linkage mode, the second insulating pull rod is provided with a drive rod in a linkage mode, thedrive rod is provided with a guide rod in a linkage mode, and the guide rod is connected with one end of the vacuum arc extinguishing chamber. The high altitude indoor high voltage combined vacuum circuit breaker has the advantages of being small in operating mechanism operation power, long in machine life, high in arc extinguishing capability, good in protecting effect and small in maintenance and can be more suitable for being used in a bad environment and a high altitude region.

The contactor includes case, quenching pot, electromagnetism gear inside case. The electromagnetism gear is composed of dynamic iron core, static iron core and magnet coil. Contact gear including dynamic contact, static contact and assistant contact is above the case. Characters are that magnet steel of permanent magnetism is setup on dynamic iron core. impulse current in 0.2 second completes function of contactor without consuming maintenance current so as to save energy more than 99%. Features of the disclosed contactor are: no heat generation from electromagnetism coil, quick detaching contacts, strong arc extinguishing capability, small contact resistance and 12000 gauss high magnetism density.

The invention discloses an arc extinguish chamber structure of a disconnector. The arc extinguish chamber structure of the disconnector comprises a pair of arc insulation walls (1) arranged oppositely, a plurality of arc extinguish grid pieces (2) which are arranged between the arc insulation walls (1) and are parallel with one another at intervals, and an insulating grid plate (3) located above the arc extinguish grid pieces (2), wherein a plurality of extending non-through air exhaust gaps (4) are formed on the insulating grid plate (3), the air exhaust gaps (4) and the multiple extinguish grid pieces (2) which are parallel with one another at intervals are intersected to form a plurality of air exhaust holes used for discharging arc free steam, the non-through air exhaust gaps and the air exhaust holes formed by the air exhaust gaps and the arc extinguish grid pieces are favorable for discharging of the arc free steam, can block a returning path of metallics in the arc free steam and prevents the metallics from returning to the arc extinguish chamber again after the metallics are discharged from the arc extinguish chamber, and therefore the density of metal steam in the arc extinguish chamber is effectively lowered, and dielectric strength is improved.

The invention relates to a direct-current soft switching-off module and belongs to the high-voltage direct-current circuit breaker technical field. The direct-current soft switching-off module can be adopted as a switch contact and a high-power direct-current contactor contact of a high-voltage direct-current system so as to realize soft switching off in current switching off to eliminate electric arcs. According to the direct-current soft switching-off module, a metal contact of a switch is connected in parallel with three branch circuits, namely, a thermistor and thyristor series branch circuit, a capacitor and resistor series branch circuit and a varistor, wherein the thyristor can be replaced by a temperature control switch; the metal contact and each parallel branch circuit are adopted as an integrated body so as to form the direct-current soft switching-off module, and a shell and a mechanical shifting device can be additionally adopted, and as a result, a switch product can be formed. The direct-current soft switching-off module of the invention has the advantages of simple circuits, low cost of components, simple manufacturing process, excellent actual measurement arc quenching performance and high switching-off performance.