373 results about "Vacuum circuit breakers" patented technology

The invention relates to the field of vacuum circuit breakers, in particular to a vacuum circuit breaker opening and closing dynamic characteristic calculation method, device and equipment and a medium. Establishing a three-dimensional geometric model of the pole-mounted vacuum circuit breaker arc extinguish chamber and the moving and static contacts; setting material attributes for each part in the three-dimensional geometric model; constructing a multi-physics field coupling system; the area where the moving contact is located is divided into movable grids, and the grid density of the moving contact and the grid density of the static contact dynamically change along with time; and performing multi-field coupling transient solution according to the three-dimensional geometric model, the multi-physical field coupling system and the movable grid to obtain the dynamic characteristics of the vacuum circuit breaker. The electromagnetic field, the thermal field, the fluid field, the structure field and the circuit are subjected to full coupling analysis, multi-physical field strong coupling dynamic simulation of the whole opening and closing process is achieved, and the dynamic characteristics of the whole opening and closing process can be accurately calculated.

The invention relates to the technical field of electric power, in particular to a vacuum circuit breaker and a phase selection closing control method, and the vacuum circuit breaker comprises a hybrid electromagnetic mechanism and a vacuum arc-extinguishing chamber; the hybrid electromagnetic mechanism comprises a permanent magnet closing assembly and an electromagnetic repulsion opening assembly, the permanent magnet closing assembly comprises double coils and a T-shaped movable iron core which are arranged in parallel, and a discharge loop is formed to drive a movable contact of the vacuum arc-extinguishing chamber to complete a closing action and maintain a closing state; the electromagnetic repulsion opening assembly comprises a static coil panel and a moving coil panel which are coaxially and oppositely arranged to form a reverse current repulsion loop so as to drive a moving contact of the vacuum arc-extinguishing chamber to complete an opening action and maintain an opening state, and the moving coil panel is connected with a T-shaped moving iron core of the permanent magnet closing assembly through an insulating guide rod; the vacuum arc-extinguishing chamber comprises a driving connecting rod, a moving contact and a static contact, one end of the driving connecting rod is connected with the moving contact, and the other end of the driving connecting rod is connected with the insulating guide rod. Therefore, the opening and closing speed of the vacuum circuit breaker is improved.

This disclosure proposes a vacuum circuit breaker, comprising a stationary conductive component and a moving conductive component. The moving conductive component is configured to adjustably move toward and contact the stationary conductive component to achieve the closing action of the vacuum circuit breaker. The solid-sealed pole also includes a buffer energy-absorbing mechanism, which includes a first movable member and a second movable member. The first movable member is located on the side of the stationary conductive component opposite to the moving conductive component. The second movable member is located on the side of the stationary conductive component opposite to the moving conductive component and is movably connected to the stationary conductive component. The second movable member is movably connected to the first movable member. The buffer energy-absorbing mechanism is used to absorb the impact energy generated when the stationary conductive component contacts the moving conductive component. Through the above design, this disclosure utilizes the movable connection design between the first movable member and the stationary conductive component and the movable connection design between the second movable member and the first movable member to construct a buffer structure with two degrees of freedom, thereby achieving a buffer function in the above two degrees of freedom.

The invention discloses a vacuum circuit breaker assembly positioning device with an automatic nut locking function, and particularly relates to the field of vacuum circuit breaker assembly.The vacuum circuit breaker assembly positioning device comprises two positioning boxes, positioning seats are fixedly arranged on the sides, close to each other, of the two positioning boxes, and a supporting plate is arranged between the two positioning seats; mounting holes are formed in the two positioning seats, locking nuts are fixedly arranged at the positions, located at the mounting holes, of the bottom ends of the positioning seats, locking screws are arranged at the locking nuts, limiting rods are fixedly arranged at the upper ends of the locking screws, and limiting caps are fixedly arranged at the ends, away from the locking screws, of the limiting rods. The locking screw rod can be matched with the locking nut when rotating, so that the locking screw rod is screwed into the locking nut until the limiting cap tightly abuts against mounting pieces on the two sides of the vacuum circuit breaker, mounting and fixing of the vacuum circuit breaker are achieved, operation is simpler, and the problem that mounting is not easy due to narrow space can be solved.

The invention discloses a high-stability permanent magnet type vacuum circuit breaker device, which belongs to the technical field of circuit breakers, and comprises a circuit breaker main body and a mounting mechanism arranged on the circuit breaker main body, the mounting mechanism comprises a clamping piece I and a clamping piece II, a rotating shaft is fixedly mounted at one end of the clamping piece I, a connecting piece is fixedly mounted at one end of the clamping piece II, the connecting piece is rotationally connected with the rotating shaft, clamping plates are fixedly mounted at the other ends of the clamping piece I and the clamping piece II, and the outer side of the clamping piece II is fixedly mounted on the circuit breaker main body; a fixing mechanism is arranged between the first clamping piece and the second clamping piece. Dependence of traditional bolts and tools is abandoned, modular rapid clamping and self-locking design is adopted, and the high-altitude operation efficiency is greatly improved.

The utility model relates to the field of electric power system and high voltage switch equipment discloses vacuum circuit breaker with signal feedback mechanism, including arc extinguishing chamber, the bottom fixedly connected with mechanism box of arc extinguishing chamber, the outside of mechanism box is provided with quick -witted connection mechanism, the top fixedly connected with voltage transformer of quick -witted connection mechanism, the outside fixedly connected with base of mechanism box, the outside of base is provided with quick -witted break mechanism, quick -witted connection mechanism includes support connecting plate, the outside fixedly connected with air cylinder no.

A vacuum circuit breaker includes: a vacuum valve accommodated in a tank having a cylindrical shape; a movable-side shield installed on a movable side of the vacuum valve; a movable-side main contact point having a tubular shape to cover the vacuum valve and the movable-side shield from radially outside; a contact point driver that moves the movable-side vacuum contact point and the movable-side main contact point in conjunction with each other; and an insulating rod that transmits a force to the contact point driver. The contact point driver includes: a low gas pressure section lever connected to a contact via a contact pressure applier that applies a contact pressure to the contact; a rotary seal shaft fixed to the low gas pressure section lever; and a high gas pressure section lever fixed to a portion of the rotary seal shaft exposed to the high gas pressure section.

The application discloses a kind of vacuum switch contact ablation intelligent evaluation method based on physical information fusion, belong to vacuum circuit breaker technical field.The method of the present application includes: according to the data set of vacuum switch breaking type obtained from vacuum arc experimental data, construct physical information enhanced support vector machine to predict breaking type of working condition;Vacuum arc simulation model is extracted from each working condition Contact surface energy flow density radial distribution data, and is fitted by Gaussian function;Based on the energy flow density radial distribution curve obtained by fitting, a vacuum arc simulation data set is constructed, and a physical information enhanced Gaussian process regression is constructed to predict the energy flow density of the working condition;Combining the heat transfer model to solve the radial distribution of contact surface temperature, further quantitatively evaluate the ablation degree of contact surface, and output the ablation degree level.The present application embeds the physical law of vacuum arc into machine learning model, realizes the breaking type prediction, energy flow density prediction and contact temperature rise calculation and ablation degree calculation and evaluation.

The invention discloses a rapid and reliable reclosing switch, relates to the technical field of vacuum circuit breakers, and aims to solve the problems that an existing vacuum circuit breaker is mainly driven by an electromagnetic operating mechanism to complete closing and opening actions, but the premise of realizing stable closing and opening by the electromagnetic operating mechanism is stable and continuous output of current, and the operation is inconvenient. In order to form a stable magnetic field to maintain switching-on and switching-off actions and solve the technical problem that when current fluctuates, a switch is prone to tripping without permission, the switch comprises symmetrically arranged bases, a U-shaped shell and a frame-shaped connecting piece are detachably connected between the bases, and an insulating substrate is detachably installed at the top of the inner wall of the U-shaped shell. Opening and closing switch assemblies are detachably installed at the bottom of the insulating substrate at equal intervals, an opening and closing indication assembly is fixedly arranged on one side of the bottom of the insulating substrate, and an opening handle assembly is movably installed in one side of the U-shaped shell. The invention has the advantage of improving the stability and reliability of closing.

The utility model relates to a conductive connecting piece for a vacuum circuit breaker and a vacuum circuit breaker, the conductive connecting piece is configured to be connected between an upper contact arm and an upper outgoing end line of the vacuum circuit breaker, the upper contact arm and an upper outgoing end line are spaced along the vertical direction, the conductive connecting piece comprises an upper connecting block which is aligned with the upper contact arm along the horizontal direction and is connected to the upper contact arm; the lower connecting block is aligned with the upper wire outlet end along the horizontal direction and is connected to the upper wire outlet end; and the conducting bar is connected between the upper connecting block and the lower connecting block and is integrally formed with the upper connecting block and the lower connecting block.

The utility model relates to the technical field of vacuum circuit breakers, and discloses a high-voltage vacuum circuit breaker which comprises a base, a high-voltage vacuum circuit breaker body and a rainproof device. According to the high-voltage vacuum circuit breaker, the high-voltage vacuum circuit breaker body can be normally used outdoors through the arranged rainproof device, the influence of rainwater on the high-voltage vacuum circuit breaker body is reduced, meanwhile, through dynamic ventilation and rainproof protection, the heat dissipation and rainproof problems of the high-voltage vacuum circuit breaker body when the high-voltage vacuum circuit breaker body is used outdoors are solved, and the service life of the high-voltage vacuum circuit breaker body is prolonged. When it rains, a rainwater sensor makes contact with rainwater and controls a double-shaft motor to stop working at the same time, in this way, two cooling fans stop rotating, two baffles block the outsides of two first rainproof frames respectively, rainwater cannot enter the rainproof shell from the two sides, and due to the fact that the outdoor temperature is low when it rains, the rainwater cannot enter the rainproof shell from the two sides; the heat dissipation capacity of a second breathable net plate on the top of the rainproof shell can meet the requirement for heat dissipation in rainy days, and the rainwater sensor can control the double-shaft motor to work when it does not rain.

The utility model discloses a combined vacuum circuit breaker mechanism side plate comprising a side plate body, the surface of the side plate body is provided with a main shaft hole, one side of the side plate body is provided with a supporting seat concentric with the main shaft hole, the surface of the supporting seat is provided with a plurality of sliding grooves, the sliding grooves are internally provided with supporting rods in a sliding manner, and the supporting rods are arranged in the sliding grooves in a sliding manner. Supporting plates are arranged at the ends, close to the circle center of the main shaft hole, of the supporting rods, clamping grooves are formed in the ends, away from the supporting plates, of the supporting rods, the outer side of the supporting base is sleeved with annular springs, and the annular springs are embedded into the clamping grooves in a clamped mode. According to the utility model, the annular spring contracts to drive the supporting rod and the supporting plate to extrude towards the circle center of the main shaft hole, so that a supporting and buffering effect can be effectively provided for the circuit breaker main shaft, the phenomenon that the circuit breaker main shaft and the main shaft hole are collided and damaged due to shaking or vibration in the rotating process of the circuit breaker main shaft is avoided, and the service life is prolonged.

This invention discloses a switching circuit and control method for a vacuum on-load tap changer, belonging to the field of tap changer technology. The switching circuit of this invention includes: a main current-carrying switch M1, a main current-carrying switch M2, a changeover switch T, vacuum circuit breakers V1, V2, and V3, and a transition resistor R. The timing sequence of switching from the N tap side to the N+1 tap side and from the N+1 tap side to the N tap side in this invention's switching circuit is symmetrical, greatly simplifying the mechanical design. The use of symmetrical timing and a single transition resistor design saves on switch manufacturing costs. The task of passing and interrupting current during the switching process is undertaken by the three vacuum circuit breakers V1, V2, and V3, sharing and balancing the switching task of the vacuum bulb.

The invention discloses a vacuum circuit breaker conductive loop temperature rise simulation optimization method, which comprises the following steps of: obtaining structure parameters of a circuit breaker, identifying a temperature rise sensitive area and constructing a simplified geometric model and a grid model; establishing a multilayer coating equivalent model and a contact resistance analytical model based on the coating parameters and the surface roughness, and determining initial contact parameters; constructing an electro-thermal coupling multi-physical field simulation model, executing bidirectional coupling iteration solution of a current field and a temperature field, and dynamically correcting the resistance value of the contact resistance analysis model according to the current temperature field distribution in the iteration process until a convergence condition is met; and outputting a steady-state temperature field and determining an optimal process scheme. According to the method, the temperature-load coupled contact resistance dynamic evolution model is established, so that the problem of prediction deviation caused by neglecting of contact surface microstructure dynamic change in traditional simulation is solved, and the temperature rise calculation precision is improved.

The invention relates to the technical field of high-voltage electric appliance switch equipment, and discloses a high-safety vacuum circuit breaker for power distribution control equipment, which comprises a vacuum circuit breaker body and a movable frame for bearing the vacuum circuit breaker body, the vacuum circuit breaker body comprises a solid-sealed polar pole main body, the solid-sealed polar pole main body is provided with an upper transverse outlet and a lower transverse outlet, and plum blossom contacts are arranged at the transverse outlets; a vacuum tank and an inner sealing cylinder positioned below the vacuum tank are packaged in the solid-sealed polar pole main body; an insulating transmission sleeve is arranged in the inner sealing cylinder, and an insulating transmission rod inner core is movably arranged in an inner cavity of the insulating transmission sleeve in a penetrating mode. The wax type temperature sensing bulb is arranged in the conductive arm base, the kick type diaphragm is used as a trigger medium, a direct linkage relation between the contact temperature and mechanical locking is established, contact fusion welding, arcing or explosion accidents caused by forced switching-out are effectively prevented, and the operation and maintenance safety of power distribution equipment is improved.

The application relates to an electromagnetic operating mechanism with a breaking middle section buffer, which is used in a high-voltage vacuum circuit breaker, a moving guide rod extends into a frame from one end of the frame, the moving guide rod and the frame are in sliding connection, a repulsion disc is fixedly connected with the moving guide rod and is located in the frame, a closing limiter is fixed in the frame, the closing limiter is sleeved outside the moving guide rod and is located above the repulsion disc, a breaking limiter is fixed in the frame and is located below the repulsion disc, a breaking repulsion coil is installed in the frame and is sleeved outside the breaking limiter, and a middle section buffer coil is fixed on a side wall of the frame and is located in a movement area of a breaking middle section of the moving guide rod. The application also relates to a use method of the electromagnetic operating mechanism with the breaking middle section buffer. The application realizes the movement characteristics of the breaking middle section deceleration and later acceleration of a moving contact in a breaking process of the circuit breaker and belongs to the technical field of high-voltage circuit breakers.

The application discloses a transformer on-load tap changer based on a phase selection technology and a gear switching method, which comprises a main circuit and a transition circuit connected with transformer winding taps, the main circuit comprises gear selection circuit and on-off circuit connected in sequence, the gear selection circuit comprises at least four relays for switching the working gear of the transformer; the on-off circuit is composed of vacuum circuit breaker VCB2, diode D2 and vacuum circuit breaker VCB4 connected in series; the transition circuit is formed by transition resistor R, vacuum circuit breaker VCB1 and diode D1 connected in parallel, and vacuum circuit breaker VCB3 connected in sequence, the transition circuit cooperates with the main circuit to realize the arcless switching of the transformer gear; all the vacuum circuit breakers are controlled to act by permanent magnet operating mechanisms, and the permanent magnet operating mechanisms are used to drive the vacuum circuit breakers to realize the fast on-off according to the voltage phase signal. The application controls the action of the vacuum circuit breaker by the phase selection technology and the conduction and cutoff characteristics of the diode, reduces the generation of arc, and prolongs the electric life.

The application provides a method for identifying poor contact of a circuit breaker trolley in a working position, the circuit breaker trolley being located in a medium-voltage switch cabinet, and the method comprises the following steps: acquiring vacuum circuit breaker state data and microswitch state data; determining that the circuit breaker trolley is in a working position according to the vacuum circuit breaker state data and the microswitch state data; acquiring time series data of an ambient temperature of the circuit breaker trolley and real-time temperatures of upper connectors and lower connectors of the circuit breaker trolley; calculating steady-state temperatures of the upper connectors and the lower connectors under a rated current according to the ambient temperature and the time series data of the real-time temperatures; and identifying whether the circuit breaker is in poor contact according to the steady-state temperatures of the upper connectors and the lower connectors under the rated current.

The utility model relates to an isolation switch of a vacuum circuit breaker, which comprises two switch blades, the outer sides of the front ends of the two switch blades are respectively provided with a reinforcing clamping plate, the front ends of the reinforcing clamping plates protrude out of the front ends of the switch blades, and the rear ends of the two reinforcing clamping plates are provided with first bolt pairs penetrating through the two switch blades in a penetrating manner. A first spring is arranged on a first bolt of the first bolt pair in a penetrating mode, a second bolt pair is arranged at the front ends of the two reinforcing clamping plates in a penetrating mode, and a second spring is arranged on a second bolt of the second bolt pair in a penetrating mode. According to the isolating knife switch of the vacuum circuit breaker, the balance of clamping force in front of and behind the contact point of the knife switch and the static contact is enhanced through the effect of the reinforcing clamping plate, so that the knife switch and the static contact are more stably kept to be jointed, and the performance requirement of dynamic thermal stability of the vacuum circuit breaker is met.

This invention discloses a small-sized, highly sensitive, and stable dual-power vacuum circuit breaker. The technical solution includes: a frame, solid-sealed poles arranged in a three-phase distribution at the front end of the frame, a main circuit breaker operating mechanism and a standby circuit breaker operating mechanism located at the rear end of the frame. Each phase of the solid-sealed pole includes a first power circuit and a second power circuit. The main circuit breaker operating mechanism and the standby circuit breaker operating mechanism control the on / off state of the first power circuit and the second power circuit respectively via a linkage mechanism on the main shaft. The linkage mechanism includes two crank arms rotatably mounted on a fixed base via a first connecting shaft, and a second connecting shaft... The system includes two first linkage rods rotatably mounted on the lower ends of the two crank arms, a lower connecting seat rotatably mounted on the lower ends of the two first linkage rods via a third connecting shaft, and an upper connecting seat rotatably mounted on the upper ends of the two crank arms. The upper connecting seat is connected to the moving iron core of the fixed pole post, and the lower connecting seat is connected to the main shaft. The crank arm includes an upper crank arm and a lower crank arm. The upper crank arm and the lower crank arm are set at an obtuse angle, and the lower crank arm and the first linkage rod, as well as the first linkage rod and the lower connecting seat, are set at acute angles.

The utility model provides a vacuum circuit breaker operating mechanism, vacuum circuit breaker operating mechanism includes vacuum circuit breaker body, the corner of vacuum circuit breaker body is equipped with the snap -fit assembly and two stable components for adapting the snap -fit assembly of different size protection component usefulness, a plurality of protection components all sleeve the corner of vacuum circuit breaker body, the one end of a plurality of protection components all stably inserts into two stable components, the other end of a plurality of protection components and the top of snap -fit assembly are engaged, and the corner of vacuum circuit breaker body still is equipped with the scale of being convenient for snap -fit assembly and two stable components installation usefulness, the utility model provides vacuum circuit breaker operating mechanism, through setting up snap -fit assembly and two stable components at the corner of vacuum circuit breaker body, protection component can adopt one end stable, one end snap -fit composite connection mode, makes device use effect good, convenient installation and disassembly and high applicability.

The invention provides a high-frequency harmonic suppression method, device and equipment for vacuum circuit breakers and a storage medium, each vacuum circuit breaker is provided with a high-frequency harmonic damper, and the method comprises the following steps: collecting power grid voltage and current signals of each vacuum circuit breaker in a preset area, and determining a harmonic state vector according to the power grid voltage and current signals; based on a preset multi-agent environment, calculating a first admittance value of a connected harmonic damper according to the harmonic state vector, and determining a damping action instruction according to the first admittance value; performing multi-round iteration on the damping action instruction according to a preset distributed collaborative architecture to obtain an execution instruction, the execution instruction comprising a second admittance value; modulating a driving signal of the high-frequency harmonic damper according to a second admittance value of the execution instruction so as to enable the high-frequency harmonic damper to output a high-frequency wave blocking signal; and inputting the high-frequency wave-blocking signal into the vacuum circuit breaker to reduce the high-frequency harmonic wave of the vacuum circuit breaker.

The invention relates to the technical field of electrical switch cabinets, in particular to a compact high-voltage switch cabinet which is characterized in that the bottom of a bearing frame is integrated with an external box transformer substation bottom frame, and a plurality of sealing plates are detachably arranged on the peripheral side faces and the top of the bearing frame; the vacuum circuit breaker unit is arranged in a front side area in the bearing frame, the primary element unit is arranged in a rear side area in the bearing frame, the instrument chamber unit is arranged in a side edge area in the bearing frame, and the voltage transformer unit is arranged in a bottom area. The front side area, the rear side area, the side edge area and the bottom area of the bearing frame structure are functionally partitioned, all units are independently arranged, the internal space utilization rate is remarkably increased, and mutual interference among elements is reduced. And the sealing plate adopts a detachable and split structure, so that the maintenance is more convenient, and the safety is higher. The bearing frame is integrated with the box-type transformer substation bottom frame, so that the overall structure is more compact, the occupied area is smaller, and the box-type transformer substation is suitable for various compact power distribution scenes.

The utility model discloses an outdoor modularized vacuum circuit breaker for an electrified railway, which comprises a box body, a transmission module, a monitoring and control unit, an insulating module, an insulating pull rod and a solid-sealed polar pole, wherein the transmission module and the monitoring and control unit are arranged in the box body; the insulating module is arranged at the top of the box body; the monitoring unit is used for monitoring the running state of each component in real time; the transmission module comprises a transmission assembly and an opening assembly and a closing assembly which are respectively connected with the transmission assembly, the transmission assembly drives the opening assembly to execute opening operation and drives the closing assembly to execute closing operation, and the main control board of the monitoring and control unit is in communication connection with a driving part of the transmission assembly. The device is reliable in structure, adopts modular design, can be quickly disassembled, assembled and maintained, reduces the operation and maintenance cost, is high in reliability, and adapts to outdoor severe environments and frequent operation; moreover, the circuit breaker is good in vibration resistance and sealing performance, guarantees long-term stable operation, integrates monitoring and remote control, and remarkably improves the equipment performance and the operation and maintenance efficiency.

The invention discloses a method for preparing a composite material through an air pressure driven infiltration process and the composite material, and belongs to the technical field of contact material preparation through powder metallurgy. The method comprises the following steps: uniformly mixing electrolytic copper powder and ball-milled tungsten carbide powder, adding a forming agent, and mixing to obtain a mixture; the mixture is pressed according to the preset pressed blank density, and a green body is obtained; and the green body is subjected to degreasing pressure sintering treatment and air pressure driving infiltration treatment, and the composite material is prepared. According to the method, the copper liquid is forced to permeate into the fine pores of the tungsten framework through pneumatic driving, the porosity is greatly reduced, the problems of pores, interfaces, uniformity and the like of products produced through a traditional infiltration process are solved, the practicability of industrial mass production is also considered, and the method is suitable for industrial production. And finally, the CuWC contact material with high density, excellent mechanical property and high stability is prepared, and the strict requirements of high-end electrical equipment such as a high-voltage switch and a vacuum circuit breaker on the contact material can be met.

The invention discloses a compact permanent magnet driven vacuum circuit breaker, and belongs to the technical field of vacuum circuit breakers. The compact permanent magnet driven vacuum circuit breaker comprises a circuit breaker shell, sliding rails are in threaded connection with the inner walls of the two ends of the circuit breaker shell, reset assemblies are arranged on the inner sides of one ends of the sliding rails, screw rods are arranged in the sliding rails, one ends of the screw rods penetrate through the sliding rails and are welded with transmission gears, sliding blocks are installed on the sliding rails in a sliding mode, and the transmission gears are welded to the sliding blocks. And the sliding block is in threaded connection with the screw rod, and the outer wall of the sliding block is in threaded connection with an air exhaust frame. The permanent magnet vacuum circuit breaker effectively solves the problems that in the prior art, after the permanent magnet vacuum circuit breaker is continuously electrified and works, a large amount of heat is generated and gathered in the permanent magnet vacuum circuit breaker, and the heat in the permanent magnet vacuum circuit breaker cannot be dissipated in time due to the fact that an existing permanent magnet vacuum circuit breaker cannot effectively dissipate heat; and the circuit and parts in the permanent magnet vacuum circuit breaker can be damaged, so that the service life of the permanent magnet vacuum circuit breaker is greatly shortened.

The invention provides a pole-mounted vacuum circuit breaker and a control method thereof, and relates to the technical field of power distribution equipment of a power system. The pole-mounted vacuum circuit breaker comprises a circuit breaker body, a multi-transformation-ratio current transformer and an isolation module, and further comprises an automatic transformation ratio adjustment module which comprises a change-over switch and a first motor used for driving the change-over switch to switch taps; the electric on-off isolation module comprises a motor module used for driving the isolation module to act; and the central control unit is electrically connected with the first motor and the motor module, and is used for controlling the first motor to act according to the line load change so as to automatically switch the transformation ratio of the mutual inductor, and controlling the motor module to act according to an instruction so as to realize electric closing and opening of the isolation module. On the basis, the problems that an existing pole-mounted vacuum circuit breaker cannot adjust the transformation ratio of a mutual inductor in time according to the load requirement, and the isolation function depends on manual operation are solved.

This application relates to the field of circuit breaker technology, specifically disclosing a pole-mounted circuit breaker. The pole-mounted circuit breaker includes a base, three breaking poles, a support frame, a lifting frame, a drive unit, and three insulating supports. The three breaking poles and the support frame are all fixed to the base. Each breaking pole has a first terminal, a vacuum circuit breaker, and an internal terminal that are electrically connected in sequence. Each insulating support has a second terminal. The lifting frame and the drive unit are mounted on the support frame. The support frame has multiple parallel vertical guide rods. The lifting frame has three switches. The drive unit can drive the lifting frame to move along the vertical guide rods, using the weight of the lifting frame to connect each switch to an internal terminal and a second terminal, or drive the switch to disengage from the internal terminal and the second terminal. The lifting frame can move stably up and down along the vertical guide rods, ensuring precise connection or separation between the switches and the internal and second terminals, reducing the likelihood of poor closing contact.

The utility model discloses a kind of longitudinal spin indoor ac metal-enclosed switchgear, including cabinet, and contact box device, valve gear, longitudinal spin isolation vacuum circuit breaker, inductance device arranged from top to bottom in cabinet, driving assembly is respectively acted on longitudinal spin isolation vacuum circuit breaker and valve gear;By longitudinal spin isolation vacuum circuit breaker and the partial stroke of valve, that is, longitudinal spin isolation vacuum circuit breaker and valve gear share a driving assembly, but the time point of valve being driven by driven assembly precedes longitudinal spin isolation vacuum circuit breaker end or later than longitudinal spin isolation vacuum circuit breaker execution.Such shortens the movement stroke of valve, reduces its space requirement in cabinet, realizes the miniaturization of longitudinal spin indoor ac metal-enclosed switchgear.

The utility model relates to the technical field of power equipment, and discloses an interlocking device for a vacuum circuit breaker, which comprises a base, a device body is fixedly connected outside the base, a plurality of isolating switches are fixedly connected at the top of the device body, a plurality of grounding switches are fixedly connected at the bottom of the device body, and the grounding switches are fixedly connected at the bottom of the device body. The outer part of the base is fixedly connected with a wiring terminal, the inner part of the base is fixedly connected with a self-locking mechanism, and the outer part of the base is fixedly connected with a plurality of anti-loosening mechanisms; the self-locking mechanism comprises a driving rod, the exterior of the driving rod is rotationally connected to the interior of the base, and a plurality of trigger plates are fixedly connected to the exterior of the driving rod. According to the utility model, by rotating the spring bolt, the driven rod drives the trigger plate to move, and by cooperating with the pawl driven by the tension spring, when the grounding switch is switched on in place, the pawl is clamped into the tooth groove of the ratchet wheel to realize self-locking, false switching-off is prevented, and the safety of grounding operation is enhanced.