299results about How to "Improve arc extinguishing effect" patented technology

The invention discloses an intelligent high-pressure dual power supply shift switch, comprising a gas seal box, three primary power supply terminals disposed on the gas seal box, three standby power supply terminals and three load terminals, and a power supply shift mechanism set in the gas seal box; characterized that: the switch also comprises a three-phase vacuum breaker device, the three-phase vacuum breaker device comprises three vacuum interrupters, three moving contacts, three static contact and a operation mechanism; each of the moving contact/static contact is connected with the corresponding primary power supply terminal/standby power supply terminal via the power supply shift mechanism, each of the static contact/moving contact is connected with a corresponding load terminal. The invention has the advantages of simple structure, low costs, suitable for eliminating potential security hazard effectively.

This invention relates to a copper-base contact compound material used in low and medium voltage electric appliance switches and its preparation method. The material is composed of materials in the following weight percentage: Sn 0.1-0.5%, B carbide 0.1-5%, the mixed rare earth of fat La or fat Ce 0.05-2%, the rest is Cu. The material is prepared by mixing, cold- pressing powders, cold-pressing again and sintering to finish the product.

The invention discloses a circuit breaker which comprises a housing, a contact mechanism, an arc extinction system, an operation mechanism and a magnetic tripping mechanism, wherein the contact mechanism comprises a dynamic contact and a static contact; a dynamic contact point is arranged on the dynamic contact; a static contact point is arranged on the static contact; the arc extinction system comprises an arc extinction system chamber; the arc extinction chamber is provided with an arc extinction grid-plate, an arc isolation plate and an arc striking assembly; the arc striking assembly comprises an upper arc striking plate and a lower arc striking plate; the lower arc striking plate is connected with a bimetallic strip; the bimetallic strip is matched with the dynamic contact in a linkage manner; the operation mechanism comprises a handle, a main bracket, a linkage assembly and a lock catch assembly; the lock catch assembly comprises a lock catch and a jump catch; the magnetic tripping mechanism comprises an iron core, a coil and a magnetic yoke; the arc extinction chamber comprises an arc inlet end and an arc outlet end; the arc outlet end is provided with arc outlet shunting partition regions which are a first arc outlet region and a second arc outlet region respectively; and arc guide outlets communicated with the first arc outlet region and the second arc outlet region are formed in the housing. The circuit breaker has the advantages of good breaking capacity, excellent arc extinction effect, safety and reliability.

The invention discloses a non-polar hydrogen mixed gas DC (direct-current) arc extinction system for a DC contactor. The DC arc extinction system comprises a moving contact, four pairs of moving and static arc striking contacts, a static contact, a grid group and a permanent magnet. The non-polar hydrogen mixed gas DC arc extinction system is non-polar, namely the arc extinguishing property can not be influenced by the change of the current direction. According to the non-polar hydrogen mixed gas DC arc extinction system, the arc striking contacts strike electric arc to smoothly move along a track of the arc striking contacts, the arc striking contacts, the grid group and the permanent magnet are reasonably arranged, and the electric arc between the moving contact and the static contact is better and rapidly extinguished, thus the short circuit caused by sudden reversing of current is solved, and the breaking capacity is further improved. Hydrogen or a hydrogen mixed gas can be inflated into the non-polar hydrogen mixed gas DC arc extinction system for realizing arc extinguishing.

The invention discloses an arc-extinguishing load switch which comprises a base, a lower terminal post assembly, an upper terminal post assembly and an arc-extinguishing assembly, wherein the lower terminal post assembly comprises a lower conductive seat, a moving contact and a lower terminal post, an annular groove is arranged on the circumferential surface of an inner hole of the lower conductive seat, a spring toucher is arranged in the annular groove and tightly sleeves the moving contact under the elastic force action so as to ensure the conductive connection between the conductive seat and the moving contact; the lower terminal post is formed through the solidification of epoxide resin which is casted outside the lower terminal seat; and the upper terminal post assembly comprises an upper conductive seat, a fixed contact and an upper terminal post, wherein the fixed contact is provided with a plurality of claws with inward elastic force, and the claws grasp the moving contact under the elastic force action so as to ensure the conductive connection between the moving contact and the fixed contact; and the upper terminal post is formed through the solidification of epoxide resin which is casted outside the upper conductive seat.

The invention discloses a bidirectional automatic switching looped device which aims to solve the problems that for an existing bidirectional automatic switching looped device, a load switch or an earthing switch is arranged in the existing bidirectional automatic switching looped device, two separate single-loop switches are adopted to be combined to form either the bidirectional automatic switching load switch or the bidirectional automatic switching earthing switch, and according to the single-loop load switch or the earthing switch, a vacuum bubble arc extinguish chamber is put into a specified insulating box and arranged in a switch cabinet; through the structure, the occupied volume is large, installation is complex, too many production processes and parts are needed, consistency is low, and serious accidents are caused when the two single load switches are closed at the same time. According to the technical scheme, a looped network cabinet body, an operation mechanism, a load switch, an earthing operation mechanism and an earthing switch are included; the operation mechanism, the load switch, the earthing operation mechanism and the earthing switch are arranged in the looped network cabinet body; the operation mechanism is connected with the load switch, and the operation mechanism drives the load switch to be closed and opened; the earthing operation mechanism is connected with the earthing switch, and the earthing operation mechanism drives the earthing switch to be closed and opened.

The invention relates to a circuit, and discloses an intelligent phase change switch control circuit which is simple in structure, small in volume, low in cost and high in precision. The circuit comprises a power source module, a microprocessor module, an electromagnet execution module, a data acquisition module, a storage module, a display module, a button processing module, a brake opening timedetecting module, a communication module and a clock module; the data acquisition module, the storage module, the display module, the button processing module, the brake opening time detecting module,the communication module and the clock module are respectively connected with the microprocessor module; each power supply module in the power source module is connected to a corresponding module; the microprocessor module is responsible for data processing and control of other modules; the brake opening time detecting module is used for detecting a time interval between a current working phase brake opening completion time and power-on time of a trip relay, and the microprocessor module is used for adjusting compensation time of next disconnection operation according to a numeric value of adisconnection time interval; the communication module provides an external communication interface and is responsible for data transmission.

The invention provides a self-learning relay zero point arc extinguishing method and a relay control circuit. The self-learning relay zero point arc extinguishing method comprises the steps that the delay time of a controller is adjusted, the controller is enabled to give out a relay contact release signal after the delay time by starting from zero point crossing of an alternating current rising edge, and a relay releases a relay contact near the current zero crossing point. According to the self-learning relay zero point arc extinguishing method provided by the invention, the controller givesout a release signal to the relay after the delay time by starting from zero point crossing of the alternating current rising edge, adjustment is performed on the delay time according to a relation between a time point of actual release of the relay contact and a time point of zero point crossing of the alternating current rising edge, thereby enabling the release time point of the relay contactis enabled to be near the zero crossing point of the alternating current rising edge, and thus reducing the arc generated by relay release; and the delay time is automatically determined by the control circuit of the relay, and the method has a good arc extinguishing effect for various types of relays.

The invention discloses an arc extinguish chamber device for a circuit breaker, which comprises a plurality of arc extinction grids which are fixed between two flash barriers and arranged at intervals. A notch is arranged at the bottom of each arc extinction grid, wherein the arc extinction grid located at the uppermost end is a top arc extinction grid, and the arc extinction grids which are located below the top arc extinction grid are lower arc extinction grids. The arc extinguish chamber device is characterized in that: the notches at the bottoms of the adjacent lower arc extinction grids are symmetrical bilaterally in shape; and the notches at the bottoms of the adjacent lower arc extinction grids are alternatively stacked and arranged in a fish scale shape. The arc extinguish chamber device provided by the invention is simple in structure, has better arc extinction property and can be used for effectively improving the breaking ability of the circuit breaker.

A linear cutting fluid for a neodymium-iron-boron permanent magnet material is characterized by comprising the compositions in percent by weight: 3%-9% of an aliphatic acid, 10%-15% of ethanolamine, 3%-6% of an amino boron phosphate, 5%-10% of a cleaning agent, 6%-9% of an antirust agent, 0.3%-1.0% of a hard water resistant agent, 0.3%-1.0% of an antifoaming agent and the balance water. The preparation method of the linear cutting fluid comprises: adding the aliphatic acid into a reaction kettle according to the amount of the formula, heating to 60-70 DEG C, adding ethanolamine with stirring, continuing to heat to 120-150 DEG C and reacting for 2 h, then cooling to 80 DEG C, successively adding the amino boron phosphate, the cleaning agent, the antirust agent, the antifoaming agent, the hard water resistant agent and water, and continuing to stir for 2 hours to obtain the finished product. The linear cutting fluid provided by the invention is low in cost, can realize long-acting antibiosis, belongs to environment-friendly product, is specially used in neodymium-iron-boron permanent magnet material processing technology, and has good cutting, cooling and rust resisting effects.

The invention belongs to the technical field of electrical equipment, and relates to arc extinguishing and/or insulating electrical equipment. According to the arc extinguishing and/or insulating electrical equipment of the invention, trans-1, 1, 1, 4, 4, 4-hexafluoro-2-butene or a mixed gas containing trans-1, 1, 1, 4, 4, 4-hexafluoro-2-butene is used as a medium-voltage and high-voltage arc extinguishing and/or insulating medium; the insulating medium has good electrical insulation and arc extinguishing performance, can greatly improve insulation capability, replaces the filling of SF6 in the arc extinguishing and/or insulating electrical equipment and reduces the influence of SF6 emission on the environment; and therefore, the problem of SF6 emission can be fundamentally solved, and theapplication temperature range of the arc extinguishing and/or insulating electrical equipment can be expanded.

The invention discloses a cabin static contact-free non-SF6 gas insulated isolating switchgear, and belongs to the field of medium-voltage switchgears. For the problems that in the prior art, the non-SF6 gas insulated switchgear is poor in arc extinguishing effect, poor in insulativity and weak in safety, the cabin static contact-free non-SF6 gas insulated isolating switchgear comprises an air chamber, a mechanism chamber, an instrument chamber, a cable chamber, a pressure release chamber and a busbar connector chamber; the air chamber comprises a busbar connector, a circuit breaker, a three-position switch, a busbar, a lead-out bushing and a gas tank which are connected in sequence, the three-position switch, the circuit breaker and the busbar are installed in the closed gas tank, the busbar connector and the lead-out bushing are installed on a gas tank shell, the gas tank is filled with non-SF6 insulating gas, and the circuit breaker is an enclosed type vacuum arc extinguishing circuit breaker. The switchgear is free of maintenance, damage of a severe environment to the insulativity is effectively prevented, and normal and safe operation of the switchgear is guaranteed.

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 discloses a copper-aluminium-base electric contact composite material. The preparation method comprises the following steps: weighing the following raw materials in percentage by weight: 50-65% of copper, 25-40% of aluminium, 5-10% of silver, 1-5% of tin, 1-3% of boron carbide and 0.05-1% of lanthanum-rich or cerium-rich mixed rare earth; making the mixed rare earth and the copper into mixed-rare-earth-copper powder; mixing the copper powder, the aluminium powder and the tin powder in a ball mill mode; and cold-press-molding the powder, sintering, secondary molding, secondary sintering, and cooling to prepare the copper-aluminium-base electric contact composite material blank. The invention selects copper and aluminium as the base; copper and aluminium have the advantages of low price and abundant resources; and the electric conductivity, the heat conductivity, the fusion welding resistance, the current erosion and the frictional characteristic of the copper and the aluminium meet the requirements for electric contact material bases. The copper-aluminium-base electric contact composite material of the invention has the advantages of strong fusion welding resistance, favorable oxidation resistance and favorable wear resistance, thereby being a low-price substitute for silver alloy electric contacts which are frequently used in low-voltage and medium-voltage switches.

The invention relates to an automatic transfer switching equipment of the alternating-current/direct-current mixing apparatus, which aims at solving the problem that the switching process of an existing automatic change-over switch can not realize the switching between the alternating current main and the direct current main. The equipment is composed of a bottom board, a master control part, arc-extinguishing equipments A and B, and an input terminal a main shaft, a movable contact, an output terminal and a fixing contact of the alternating-current side,, an input terminal, a main shaft, a movable contact, an output terminal, a fixing contact and an insulating plate of the direct-current side, wherein the master control part, a switch part of the alternating-current and a switch part of the direct-current side are fixed on the bottom board, and the switch parts of the alternating-current side and the direct-current side are separated by an insulation plate. The automatic transfer switching equipment has two sets of independent transfer systems, which can respectively switch on and broke the alternating current main and the direct current main, when one of the common power supply and the stand-by power supply of a user is the direct current power supply and the other is the alternating power supply, the switching between the two power supplies can be realized through using the same change-over switch, and the invention has the advantages the application range is wide, the operation and use is convenient and flexible, and the automatic transfer switching equipment is beneficial for the spread.

The invention discloses a plug-in module of a surge protector, comprising an upper cover, a lower cover, a state coupling rod, an overvoltage protecting and connecting component and a state indicator, wherein the upper cover and the lower cover are combined to form a shell of the plug-in module of the surge protector, the lower cover comprises a central mould frame and a side mould frame, an open hole is formed at the bottom of the side mould frame; the state coupling rod is arranged in the side mould frame of the lower cover and provided with a push rod, the push rod is penetrated through the open hole and extended out of the lower cover, and the push rod comprises a communication antenna; an energy storing spring is arranged in the side mould frame and connected with the state coupling rod for pushing the state coupling rod to move during malfunction; the overvoltage protecting and connecting component is arranged in the central mould frame of the lower cover; and the state indicator is positioned at the top of the lower cover and covered by the upper cover.

The invention relates to a residual-current circuit breaker. The circuit breaker comprises a shell, a handle, a wire outlet end, a wire inlet end, an indication button, an electromagnetic system, an L-pole arc extinguishing cover and an electric leakage circuit board and further comprises an L-pole operating mechanism and an N-pole operating mechanism which are arranged in the shell; a power taking mechanism, wherein the power taking mechanism is used for supplying power between a magnet yoke and an electric leakage circuit board on the electromagnetic system, and the power taking mechanism comprises a control piece which is arranged on the handle and used for controlling connection and disconnection between the magnet yoke and the electric leakage circuit board; a tripping mechanism, wherein the tripping mechanism comprises a voltage tripper and a tripping rod rotationally arranged in the shell, and an ejector rod on the voltage tripper pushes the tripping rod to move so as to drive a linkage piece on an operating piece to move, and the tripping rod is further provided with an elastic piece used for driving the tripping rod to rotate towards the linkage piece and driving an indication button to move upwards; and an N-pole arc extinguishing device. The circuit breaker is advantaged in that arc extinguishing can be conducted on the N pole, the arc extinguishing effect is good, the tripping effect is better, and when the circuit breaker is disconnected, the load end does not have the feeling of electric shock.

The invention discloses a melamine-epoxy glass fiber tube and a preparation method thereof. The melamine-epoxy glass fiber tube is characterized in that the melamine-epoxy glass fiber tube is an overlapped multi-layer tubular composite material prepared by rolling and pressing a halogen-free flame-retardant high-strength resin glass fiber cloth prepreg at 75-135 DEG C and carrying out curing and molding at 65-165 DEG C, wherein the prepreg is a glass fiber impregnated material which is formed by coating glass fiber cloth with a halogen-free flame-retardant high-strength resin adhesive and thenbaking the glass fiber cloth, and has a resin semi-cured product on the glass fiber cloth; and the halogen-free flame-retardant high-strength resin adhesive is prepared by mixing melamine resin, epoxy resin, a phosphorus-containing compound, a curing agent, inorganic powder, an accelerant and a solvent. The melamine-epoxy glass fiber tube is particularly suitable for fusing overload protection systems of power equipment in the industries of modern low-voltage power transmission and transformation, large and medium-sized power equipment, electric locomotives, photovoltaic (wind energy) power stations, large steel, engineering machinery and the like.

The invention discloses a zigzag synchronous compression arc extinguishing lightning protection device with arc extinguishing channels arranged in parallel. There is an arc extinguishing path composed of several sections of arc extinguishing channels arranged in parallel from top to bottom; an arc extinguishing tube (5) is placed in each section of arc extinguishing channel, wherein the arc extinguishing channel in the first section of arc extinguishing channel The head end of the tube is electrically connected to the arc striking electrode (3), the end of the arc extinguishing tube in the last section of the arc extinguishing channel is electrically connected to the connecting fitting (4), and the ends of the remaining arc extinguishing tubes are passed through a The three-way tube (6) and two T-shaped arc-guiding tubes (9) are sequentially connected; (6) Nested and connected together. The invention has the advantages of simple structure, reasonable design, stronger arc extinguishing ability and stable and reliable operation.