1207 results about "Vacuum circuit breakers" patented technology

The invention relates to the technical field of control systems, in particular to a control system and a control method of an intelligent permanent magnet vacuum circuit breaker, and the system comprises a multi-source signal synchronous acquisition module, an operation mechanism box body of the permanent magnet vacuum circuit breaker and acceleration sensors arranged at preset positions around a permanent magnet operation mechanism, a voltage transformer and a current transformer are connected to a line interface, and a unified sampling frequency and a trigger condition are set. According to the method, vibration, voltage and current signals are synchronously collected at key parts of the permanent magnet vacuum circuit breaker, timestamps are applied, a data basis of multi-source information strong association is constructed, and the direct time sequence relation between the electrical transient state and the mechanical response can be revealed. Segmented windowing and frequency spectrum transformation are carried out on collected vibration signals, a time frequency energy distribution diagram is generated, and instantaneous frequency components and energy evolution details generated by non-stationary events such as impact and friction in the opening and closing process are captured.

The invention discloses a vacuum circuit breaker state online monitoring method and system based on digital twinning, and relates to the field of intelligent operation and maintenance of high-voltage power equipment. According to the method, various sensors are arranged at key parts of the vacuum circuit breaker, breaking current, shielding case potential and vibration signals are collected in real time, and a digital twinborn model is constructed by combining multi-source data preprocessing, three-dimensional modeling, behavior rule definition and fault simulation analysis; and on-line identification and trend prediction of electrical wear, vacuum degree deterioration and mechanical abnormity are realized. The system has the functions of real-time monitoring, three-dimensional visualization, model self-learning and intelligent early warning, can be widely applied to intelligent monitoring and state evaluation of circuit breaker equipment in a power system, and remarkably improves the operation safety and operation and maintenance efficiency of the equipment.

The invention discloses a signal reconstruction denoising method for circuit breaker mechanical state evaluation and a storage medium. In order to solve the problems of multi-source signal aliasing and strong noise interference of the double-break vacuum circuit breaker, a technical route combining mechanical transfer function modeling and a double-flow deep network is innovatively adopted. A complex vibration source is analyzed by constructing a signal coupling model, environmental noise is accurately filtered by using a multi-stage noise reduction strategy, and a multi-dimensional state vector is constructed by fusing time-frequency domain features, so that accurate evaluation of the health state of the equipment is realized. Experiments show that the method is remarkably superior to the prior art in signal denoising, feature extraction precision and diagnosis accuracy, and an efficient solution is provided for intelligent operation and maintenance of power equipment.

The invention specifically relates to a vacuum circuit breaker evaluation system based on multi-modal data analysis, and relates to the technical field of power equipment state monitoring and fault diagnosis. A multi-modal feature extraction and selection module; a fault probability analysis module; and a fault matching and evaluating module. According to the method, key features and a dynamic threshold adjustment mechanism are accurately screened from mass data, traditional fixed threshold limitation is broken through in combination with fault types, noise and stages, key features are prevented from being mistakenly deleted or redundantly reserved, for example, for vacuum arc-extinguishing chamber faults, acoustic feature threshold values are reduced, weak guarantee is achieved, but key features are reserved, and therefore the reliability of the system is improved. Through preliminary screening, importance sorting and redundancy removal, finally 30-40 features focus on the core, multi-modal key information is covered, and calculation redundancy is avoided.

The invention belongs to the technical field of circuit breakers, and particularly relates to a pole-mounted vacuum circuit breaker with a visualized open circuit state. Comprising a box body, the top of the box body is fixedly provided with a plurality of vacuum arc-extinguishing chambers, the top of each vacuum arc-extinguishing chamber is fixedly connected with an upper conducting rod, one side of each vacuum arc-extinguishing chamber is provided with a lower conducting rod, and the upper conducting rods and the lower conducting rods are used for connecting lines; an operating mechanism and an executing mechanism are installed in the box body, the operating mechanism comprises a first driving rod, and the first driving rod is rotationally connected with the side wall of the box body; visualization of transmission in the box body is achieved, the maintenance efficiency is improved, and the maintenance cost is reduced; whether the upper contact and the lower contact are opened or closed can be clearly judged, quick opening and closing operation can be carried out in an auxiliary mode, and generation of electric arcs caused by low opening and closing speed is prevented; meanwhile, emergency opening and closing operation can be carried out when the circuit breaker breaks down so as to deal with emergency situations.

The invention discloses a side-mounted vacuum circuit breaker, which comprises a vacuum arc-extinguishing chamber, an operating mechanism and a side-mounted fixing piece, and is characterized in that the vacuum arc-extinguishing chamber is connected to the rear side of the operating mechanism through the side-mounted fixing piece; the operating mechanism comprises a box body, a spring, a main shaft, a second intermediate gear and a second lower driving gear, the spring, the main shaft, the second intermediate gear and the second lower driving gear are mounted in the box body, the main shaft is linked with an insulating pull rod of the vacuum arc-extinguishing chamber through a transmission mechanism, and the spring is connected to one end of the main shaft; the second intermediate gear is sleeved on the main shaft; the second lower driving gear is meshed with the second intermediate gear; a circle of gear teeth are distributed on the side face of the second intermediate gear, and the reference axis formed by the circle of gear teeth coincides with the reference axis of the second intermediate gear. An upper driving gear and a secondary transmission gear in the box body are omitted, an external second energy storage motor is adopted, the number of disassembly and assembly steps is smaller, and the maintenance efficiency is higher.

The invention belongs to the field of overvoltage protection, and relates to an overvoltage stabilizing and protecting device which comprises a data acquisition operation module, a control logic module, a display module, an overvoltage protecting assembly and a high-voltage vacuum circuit breaker or an electric isolation handcart structure. The real-time monitoring and protection of the working state of the overvoltage protection assembly are realized; through the arrangement of the high-voltage circuit breaker or the electric isolation handcart, when the overvoltage protection assembly is detected to be abnormal, the connection between the overvoltage protection assembly and the high-voltage bus can be rapidly cut off, so that the system safety is ensured; the device integrates a transient fault recording function and can capture wave map data before and after a power frequency overvoltage fault of the system; the overvoltage protection assembly in the device adopts a geometric center air cooling heat dissipation mode, the fan is quick in starting response, the operating temperature of the overvoltage protection assembly is greatly reduced, the operating time of the overvoltage protection assembly can be effectively prolonged, and the device adopts an integrated modular structural design, so that the operation safety, the maintenance and the management are greatly facilitated.

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 discloses a three-position switch operating mechanism and a breaker manual operation locking device, and is characterized in that the three-position switch operating mechanism comprises a three-position operating mechanism which is provided with a program lock; on the program lock, pressing or releasing of an interlocking rod is controlled through a lock plate to limit or not limit an operation hole sliding door plate; the tail end of the interlocking rod is connected with the adjusting block; the adjusting block is connected with the end of the connecting pull rod; the connecting pull rod penetrates through a reset spring, and the state of the interlocking rod is reset through the reset spring when the program lock is unlocked. An interlocking connecting plate is arranged at the lower end of the connecting pull rod; a closing locking sliding plate and an opening locking sliding plate are symmetrically arranged on the interlocking connecting plate; the closing and locking slide plate is arranged on the circuit breaker support plate through a first guide structure; the opening locking slide plate is arranged on the circuit breaker support plate through a second guide structure. The closing locking slide plate is provided with a closing baffle plate used for blocking or releasing the closing button. The opening locking slide plate is provided with an opening baffle plate used for blocking or releasing the opening button. According to the invention, the program lock is adopted to connect the manual operation functions of the vacuum circuit breaker and the three-position switch together to allow or prohibit operation, padlocks are reduced, the program lock can realize more interlocking functions at the same time, the higher safety operation requirements of customers are better met, and the possibility of misoperation of the switch cabinet is reduced. Functions can be realized by adding a small number of parts on the basis of the original three-position operating mechanism and circuit breaker, the cost is low, and the function is reliable.

The invention discloses a side-mounted vacuum circuit breaker ring main unit, which relates to the technical field of ring main units, and comprises a multi-source sensing module used for collecting and converting state parameters from equipment in the ring main unit and the environment of the ring main unit; the state fusion processing module is used for configuring rules according to a set sampling period and a threshold value; the intelligent auxiliary identification module is used for establishing a mapping relation between the multi-dimensional state parameters and the potential risk factors; the digital twin modeling module is used for constructing a virtual simulation model consistent with the ring main unit; the authority control and interlocking judgment module is used for fusing the state vector, the risk index value and the operator instruction parameter according to a preset authority strategy rule; the closed-loop control module comprises a control logic unit and a simulation verification unit and is configured to respond to the state event trigger signal, call a control instruction generation mechanism and call a virtual model to perform forward deduction on a control effect; according to the invention, the stability of equipment operation and the intrinsic safety level of operation are greatly improved.

The invention provides a vacuum circuit breaker with an isolating switch, which comprises a switch body and an anti-misoperation device, the anti-misoperation device comprises a first cam and an interlocking plate, the first cam is fixed on an isolating main shaft and rotates along with the isolating main shaft in a linkage manner, the interlocking plate is movably mounted on the switch body, and when the isolating main shaft is in a switching-off position, the interlocking plate rotates along with the isolating main shaft. The interlocking plate is driven by the first cam to be in a locking position, so that the interlocking plate is matched with the handle of the circuit breaker to be locked, the circuit breaker is prevented from being switched on, the situation that maintenance personnel can still manually drive the circuit breaker to be switched on when the disconnecting switch and the circuit breaker are both in a switching-off state in the prior art is avoided, unnecessary operation is prevented, and time and labor are saved; in addition, when the isolating switch is in a closing position, the isolating main shaft drives the first cam to rotate, the interlocking plate is separated from the circuit breaker handle under the acting force of the elastic piece, and the circuit breaker can be closed.

The invention discloses a longitudinal rotation indoor alternating current metal-enclosed switchgear, which comprises a cabinet body, and a contact box device, a valve device, a longitudinal rotation isolation vacuum circuit breaker and an inductance device which are arranged in the cabinet body from top to bottom, and a driving assembly respectively acts on the longitudinal rotation isolation vacuum circuit breaker and the valve device; through partial strokes of the longitudinal rotation isolation vacuum circuit breaker and the valve, namely, the longitudinal rotation isolation vacuum circuit breaker and the valve device share one driving assembly, but the time point when the valve is driven by the driving assembly is ended earlier than the longitudinal rotation isolation vacuum circuit breaker or executed later than the longitudinal rotation isolation vacuum circuit breaker. Therefore, the motion stroke of the valve is shortened, the space requirement of the valve in the cabinet body is reduced, and the miniaturization of the longitudinal rotation indoor alternating-current metal-enclosed switchgear is realized.

The invention relates to the technical field of indoor vacuum circuit breaker assembly, and discloses an indoor vacuum circuit breaker assembly line which comprises a support, a top plate is fixedly arranged on the support, a material moving assembly is fixed to the top plate, vertical grooves are formed in the material moving assembly in an array mode, transverse grooves are symmetrically formed in the material moving assembly, and two transverse grooves are formed between every two adjacent vertical grooves. Moving rods are arranged in the transverse grooves in a sliding mode, inclined rods are fixedly connected to the moving rods, transverse rods are fixed to one ends of the inclined rods, second air cylinders are fixed to the positions, located between every two adjacent vertical grooves, of the material moving assembly, two swing arms are rotationally arranged at the output ends of the second air cylinders, and one ends of the swing arms are rotationally connected with the transverse rods. The insulating sleeves are moved through the support and the conveying belt, the assembling efficiency is improved, in the actual assembling process, the multiple insulating sleeves are synchronously clamped and moved through the material moving assembly, the material moving precision is improved, the multiple insulating sleeves are synchronously lifted and moved through the material moving assembly, the heights of the multiple insulating sleeves are adjusted, and the assembling efficiency is improved. And the positioning and assembling precision of the indoor vacuum circuit breaker can be improved.

The invention relates to a closing buffer of a vacuum circuit breaker. The closing buffer comprises phase columns, a cross beam, a spring operating mechanism and a bracket, the three phase columns are arranged at the top end of the cross beam in parallel, and the top end of the support is connected to the lower surface of the cross beam and used for supporting the cross beam. The spring operating mechanism is mounted on the lower surface of the cross beam, and the spring operating mechanism is linked with the vacuum arc extinguish chamber in the phase column through a transmission module; through specially designed guiding and spring contact force values, functional requirements of guiding and contact pressure providing are realized. A closing buffer is additionally arranged in the spring contact, damping of a rigid closing point is increased through the buffer, energy of collision bounce of the rigid closing point is absorbed, and therefore bounce is restrained.

The invention provides an intelligent phase control vacuum circuit breaker health degree assessment method and device and a circuit breaker, and relates to the technical field of circuit breaker health assessment, and the method comprises the steps: carrying out the vacuum degree detection of an arc extinguish chamber in an intelligent phase control vacuum circuit breaker, and obtaining the vacuum degree; performing heating analysis on the vacuum circuit breaker according to the vacuum degree to obtain a heating parameter, and performing zero crossing point monitoring error analysis to obtain a zero crossing point error coefficient; according to the operation time parameter of the vacuum circuit breaker, mapping to obtain a mapping zero-crossing point error coefficient, calculating to obtain a zero-crossing deviation coefficient, and according to the zero-crossing deviation coefficient and an analysis deviation coefficient of heating analysis and zero-crossing point monitoring error analysis, carrying out confidence degree processing to obtain a zero-crossing confidence degree; and distributing a weight according to the zero-crossing confidence coefficient, and performing health degree calculation based on the vacuum degree and the zero-crossing point error coefficient to obtain the health degree of the vacuum circuit breaker. The technical problem of inaccurate health degree evaluation of the intelligent phase-controlled vacuum circuit breaker in the prior art is solved.

The utility model discloses an intelligent vacuum circuit breaker, which comprises an operating main shaft, an isolating switch shaft, a solid-sealed polar pole and a grounding switch, the operating main shaft and the isolating switch shaft are respectively driven to rotate by a circuit breaker electric operating mechanism and an isolating switch electric operating mechanism, and an insulating shell of the solid-sealed polar pole is provided with a current sensor and a voltage sensor. The operating main shaft drives a breaker moving contact and a breaker static contact to be in contact or separated through an insulating pull rod, the insulating pull rod is provided with a pressure sensor, the breaker static contact is connected with one end of an isolation switch disconnecting link, and an isolation switch shaft drives the other end of the isolation switch disconnecting link to be in contact or separated from an isolation static contact. The circuit breaker electric operating mechanism is provided with a remote communication antenna and a control module. The purpose of the utility model is to provide an intelligent vacuum circuit breaker, which enables a 35kV prefabricated substation to completely realize remote control, state measurement and health monitoring, improves the operation efficiency, and realizes remote control of the health state of equipment.

The invention provides a permanent magnet vacuum circuit breaker actuation time prediction method, which comprises the steps of S1, obtaining parameters of a permanent magnet operating mechanism according to an actual model of the permanent magnet operating mechanism in a permanent magnet vacuum circuit breaker; s2, constructing a BP neural network and setting training parameters according to the parameters of the permanent magnet operating mechanism; s3, optimizing an initial weight and a threshold parameter of the BP neural network by adopting a cloud genetic algorithm; s4, acquiring historical data or simulation data of the action of the permanent magnet operating mechanism as a training sample, and performing training learning on the BP neural network; and S5, the BP neural network prediction model meeting the training requirements is adopted to predict the action time of the permanent magnet operating mechanism. According to the invention, a BP neural network is optimized by using a cloud genetic algorithm (CGA), and a permanent magnet operating mechanism actuation time prediction model is established. The defects that a BP neural network is too many in iteration step number, low in convergence speed, prone to falling into a local minimum value and not capable of achieving global optimization are overcome.

The invention discloses a method and device for evaluating the electrical life of a high-capacity vacuum circuit breaker, and belongs to the technical field of vacuum circuit breakers, and the method comprises the steps: calculating the energy flow cumulant of a contact according to the obtained constant value, arcing time and arc current waveform related to a contact material; calculating the ablation deformation quantity of the contact blade according to the pre-obtained contact closing holding force and over travel; according to the obtained contact energy flow threshold value and the obtained contact blade ablation deformation threshold value, the residual electrical life of the high-capacity vacuum circuit breaker is calculated in combination with the contact energy flow cumulant and the contact blade ablation deformation quantity; judging whether the obtained residual electrical life of the high-capacity vacuum circuit breaker is lower than a set value or not, if not, repeating the steps, and if yes, alarming and ending; according to the invention, through comprehensive analysis of multiple parameters, evaluation of the electrical life of the high-capacity vacuum circuit breaker is realized according to an influence rule of different parameters on the electrical life of the vacuum circuit breaker.

The invention relates to the field of electrical equipment monitoring, in particular to an intelligent online monitoring method and system for a high-voltage vacuum circuit breaker, and the method comprises the steps: receiving a circuit breaker control signal, and carrying out the electromagnetic pushing operation of a moving contact transmission rod through a started electromagnetic coil, thereby obtaining a motion transmission rod; monitoring the motion transmission rod based on a preset monitoring frequency and a displacement sensor, performing speed analysis on a displacement time sequence to obtain a displacement fluctuation index and an average displacement speed, calculating a displacement failure rate according to the displacement fluctuation index and the average displacement speed, and if the displacement failure rate is smaller than or equal to a displacement failure threshold value, determining that the motion transmission rod does not have the displacement failure. If yes, a piezoelectric sensor, an ionization sensor and a thermal conductivity sensor are used for executing vacuum inspection operation on the vacuum arc extinguish chamber, an arc extinguish vacuum index is obtained, and when the circuit breaker monitoring platform receives a safety signal or an early warning signal, online monitoring of the high-voltage vacuum circuit breaker is completed. The real-time performance and the accuracy of monitoring the high-voltage vacuum circuit breaker can be improved.

The invention relates to the technical field of circuit breakers, and discloses an intelligent vacuum circuit breaker which comprises a vacuum circuit breaker body and a controller, a heat dissipation support is arranged at the bottom of the vacuum circuit breaker body, the heat dissipation support is provided with an upper layer and a lower layer, and an auxiliary heat dissipation mechanism is arranged between the upper layer and the lower layer of the heat dissipation support. The auxiliary heat dissipation mechanism comprises heat dissipation fins which are arranged between the upper heat dissipation support and the lower heat dissipation support and are vertically distributed at equal intervals. The heat pipe is vertically arranged in the vacuum circuit breaker body, and the other end of the heat pipe extends to the heat dissipation support located on the upper layer; the temperature sensor is arranged in the vacuum circuit breaker body and is used for detecting the temperature of the vacuum circuit breaker body; and the active heat dissipation assembly is used for carrying out active heat dissipation on the vacuum circuit breaker body according to the temperature detected by the temperature sensor.

The invention discloses a vacuum arc-extinguishing chamber contact surface condition evaluation method and system, and belongs to the technical field of vacuum circuit breakers. According to the method, short-time Fourier transform noise reduction is improved by adopting an adaptive window length, signals are enhanced in combination with dual-tree complex wavelet transform, and data are dynamically normalized by improving K-means clustering; according to the constructed lightweight CRNN model, residual connection and an SE module are introduced into a convolution module, and a bidirectional quasi-recurrent neural network is adopted by a circulation module to capture time sequence features; the mixed loss function is combined with an AdamW optimizer, and the convergence stability is improved through L2 regularization; and dynamically evaluating the ablation degree of the contact based on a fuzzy logic algorithm. According to the method, through time-frequency feature fusion and lightweight network design, high-precision classification of direct-current pre-breakdown waveforms is realized, the problems of degradation, over-fitting and slow convergence of a traditional model are solved, and an intelligent solution is provided for vacuum arc-extinguishing chamber insulation performance evaluation.

The invention relates to the technical field of vacuum circuit breakers, and discloses a digital deep fusion outdoor high-voltage vacuum circuit breaker which comprises a shell, a protection base is arranged on the shell, a placement groove is formed in the protection base, a plug is arranged in the placement groove, a digital unit used for inserting the plug is arranged on the protection base, and a protection shell is arranged on the shell. The protective shell is used for blocking an opening of the placing groove, a fastener is arranged on the protective shell, and the fastener is used for realizing mutual fixation of the protective shell and the protective base. The protective shell is mounted on the protective base through the fastener, so that the protective base and the protective shell can protect the digital unit; therefore, the digital unit can be stably fixed with the plug, the external damage to the digital unit is reduced, and the digital unit is not easy to damage due to rainwater.

The invention relates to the field of vacuum circuit breaker production testing, and discloses an outdoor pole-mounted vacuum circuit breaker testing device which comprises a machine base, two side frames symmetrically distributed are slidably arranged on the machine base, a mounting plate is fixed to the side frames, a sliding groove is formed in the mounting plate, a mounting base is slidably arranged in the sliding groove, and a stand column is fixed to the mounting base. A first air cylinder is arranged on one side of the installation base and fixed to the installation plate, the output end of the first air cylinder is fixedly connected with a flat plate, an S-shaped arc groove is formed in the flat plate, the stand column is in sliding connection with the S-shaped arc groove, a fixing rod is fixed to the installation base, and one end of the fixing rod is fixedly connected with a detection block. The flat plate is used for driving the detection block on the testing device to translate, dynamic and static balance testing is carried out on the vacuum circuit breaker, the use stability and safety of the vacuum circuit breaker product are judged, the strength of the vacuum circuit breaker can be detected in the testing procedure operation of the vacuum circuit breaker, and therefore the quality of the produced vacuum circuit breaker product is detected. And the yield of products is improved.

The invention discloses a high-voltage vacuum circuit breaker contact motion detection method and system based on an inversion model, and the method comprises the steps: firstly designing a dual-position speed sensor collection unit for collecting speed signals of different positions and different characteristics, and achieving the mutual triggering; based on an inversion model, a programmable logic component and a CPU are adopted for result operation and logic inversion and correction, a rotation angular velocity curve is obtained, and the accurate motion state is obtained through comparison; according to the method, the stroke characteristic curve in the arc extinguish chamber of the high-voltage vacuum circuit breaker can be accurately reflected, mutual conversion of angular velocity and linear velocity at different positions can be realized based on the thought of an inversion model, and finally effective data which can be analyzed and judged can be output for system application.

The utility model relates to a double-break circuit breaker switch, which comprises a mechanism frame, a circuit breaker assembly and an isolating switch assembly, and the circuit breaker assembly comprises a solid-sealed polar pole, three fixing seats, a main shaft and three groups of transmission cam assemblies. The isolation switch assembly comprises three first static contacts, an insulation isolation shaft which is rotatably arranged on the mechanism frame, three insulation cams which are respectively arranged on the insulation isolation shaft, three isolation knives which are respectively arranged on the three insulation cams, three second static contacts which are arranged on a fixed beam of the mechanism frame, and a grounding contact assembly which is arranged on the mechanism frame. The two ends of the static contact are respectively provided with a first contact part and a second contact part which are matched with the isolation knife, and a limiting check ring which is matched with the isolation knife is arranged at the position, corresponding to the position between the first contact part and the second contact part, of the static contact. The vacuum circuit breaker has the advantages of simple structure, stable and reliable performance, good insulating property, high opening and closing speed and small volume.

The invention discloses a vacuum circuit breaker breaking method for a new energy occasion, particularly relates to the technical field of power equipment breaking control, and is used for solving the problems of local ablation and breaking life attenuation caused by non-uniform distribution of arc energy on the surface of a contact in an existing high-frequency harmonic environment. The dominant frequency component of the high-frequency harmonic is extracted in real time, and arc energy concentration area distribution is generated in combination with contact material characteristics; dynamically evaluating the thermal conductivity attenuation degree based on grain structure degradation, and adaptively matching the opening speed curve and the energy diffusion rate; the anode spot migration path is identified through dynamic impedance gradient monitoring, and the magnetic field distribution of the arc extinguish chamber is synchronously adjusted to realize targeted suppression; and after breaking, a clean electric arc matched with a damage path is triggered for cladding repair, so that the breaking stability of the vacuum circuit breaker under the impact of high-frequency harmonic waves and the ablation resistance of the contact are remarkably improved.

The utility model relates to the technical field of outdoor high-voltage vacuum circuit breakers, and discloses an outdoor high-voltage vacuum circuit breaker with an isolating switch, the top of a base is fixedly connected with a circuit breaker body, the middle part of the front side of the base is fixedly connected with a fixed shell, and the two sides of the fixed shell are fixedly connected with electric push rods. A clamping plate is fixedly connected to one side of the electric push rod, a connecting base is fixedly connected to the middle of the front side of the circuit breaker body, a winding roller is rotatably connected to the interior of the connecting base, an electric wire is arranged on the winding roller, and an isolating switch is fixedly connected to the bottom of the electric wire; a servo motor, a winding roller, an electric wire and the like are arranged to be matched with the disconnecting switch for use, the servo motor drives the winding roller to rotate so as to unwind the electric wire, the electric wire drives the disconnecting switch to move downwards so as to move to the position below the circuit breaker body, and therefore the danger of electric shock caused by an operator in the using process can be prevented; and a response can be conveniently and quickly made in an emergency.

The utility model relates to the technical field of enterprise power grid operation and maintenance, in particular to a rapid isolation protection device for a grounding fault of a power grid neutral point ungrounded system, and aims to solve the problems that when the grounding fault of the power grid neutral point ungrounded system is processed at present, grounding is relieved by generally adopting an arc-extinguishing and resonance-eliminating mode of manually resetting a rapid switch; and a large-area power failure accident is caused by breakdown and short circuit of an insulation weak point of equipment in a system due to too long processing time. According to the device, a fault point is isolated through zero-sequence power direction protection action tripping, closing of the vacuum circuit breaker is converted into metal grounding through action of the quick switch arc-extinguishing and resonance-eliminating circuit, and quick fault isolation is effectively realized through automatic resetting and delay setting functions of the arc-extinguishing and resonance-eliminating circuit. Therefore, the repeated action of the rapid switch arc-extinguishing and resonance-eliminating circuit caused by intermittent arc grounding is avoided, the occurrence rate of large-area power failure accidents caused by arc grounding is greatly reduced, and the safe and stable operation of an enterprise power grid is further ensured.

The invention relates to the technical field of combined vacuum circuit breakers, and particularly discloses a combined vacuum circuit breaker, which comprises a circuit breaker body, and an energy storage brake bar and an opening and closing brake bar which are connected to the outer side of the circuit breaker body. Through the sleeve and the threaded groove in the bottom of the sleeve, the tool can be conveniently connected with the sleeve; through mutual cooperation of a round rod, two bevel gears, a cylinder and an arc edge extrusion plate, the arc edge extrusion plate abuts against an extension plate of the energy storage brake bar, under cooperation of an extrusion assembly, the energy storage brake bar can be pressed in a reciprocating mode, in this way, the tool does not need to be aligned with a pull ring, reciprocating pressing of the energy storage brake bar is achieved through rotation, and operation is easy and convenient; through mutual cooperation of the push-pull rod, the moving plate, the chute and the moving column, a worker can push and pull the sleeve to realize opening and closing of the opening and closing rod after completing energy storage operation, the opening and closing rod does not need to be operated by using a tool again, and the operation convenience of manual energy storage and manual opening and closing is greatly improved.

An integrated vacuum circuit breaker, comprising: an insulating cylinder (100), in which a single-break vacuum arc-extinguishing chamber (110) is arranged, a static end portion of the single-break vacuum arc-extinguishing chamber being provided with a static end assembly, and a movable end portion of the single-break vacuum arc-extinguishing chamber being provided with a movable end assembly; an insulating cylinder mounting plate (200), which is connected to the insulating cylinder; a mechanism mounting plate (400); a support assembly, which is arranged between the insulating cylinder mounting plate (200) and the mechanism mounting plate; and a transmission structure, one end of the transmission structure passing through the mechanism mounting plate (400) so as to connect to an operating mechanism and be in sealed connection with the mechanism mounting plate (400), and the other end of the transmission structure being connected to the movable end assembly, wherein the operating mechanism drives the movable end assembly to move in an axial direction so as to push a movable conductive rod to come into contact with a static conductive rod in the single-break vacuum arc-extinguishing chamber to perform a closing action, or to pull the movable conductive rod to separate from the static conductive rod to perform an opening action. The present invention has the beneficial effects whereby integrated assembly can be realized, and the integrated vacuum circuit breaker can be directly mounted in a GIS after being pre-assembled, thereby reducing the installation time and the labor cost.