4967results about "Air-break switches" 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.

To provide a low-cost vacuum valve capable of suppressing the emission of field electrons from a preset portion that may become the starting point of dielectric breakdown.SOLUTION: A vacuum valve includes a dielectric insulating container 1 having an internal space 1f maintained in a constant vacuum state, and various metal members E1, E2, 5, 6, 7, 10, 11, 12, 13 that are housed in the internal space of the insulating container and serve to pass and cut off electric current. From among all the surfaces of the metal members exposed to the internal space, predetermined portions are provided with molten layers 5p, 6p, 7p, 10p, 11p for suppressing the emission of field electrons. In terms of the surface roughness of the molten layer, when the arithmetic mean roughness Ra is the average value of a number of peaks that protrude in a direction perpendicular to the surface of the metal member on which the molten layer is provided, and the average distance between the peaks in the direction along the surface of the metal member on which the molten layer is provided is Rsm, the relationship Ra<Rsm is satisfied.SELECTED DRAWING: Figure 1

The invention relates to the field of circuit breakers, in particular to a primary and secondary fusion pole-mounted circuit breaker which comprises a primary and secondary fusion circuit breaker body, the primary and secondary fusion circuit breaker body comprises a fixing frame, a bottom bin is installed on the rear portion of the fixing frame, bottom columns are arranged in the bottom bin, and bottom grooves are formed in the bottoms of the bottom columns; one side in the bottom groove is in meshed connection with a tooth column, the tooth column is fixedly connected to the middle of the periphery of a rotating shaft, the rotating shaft is rotationally connected to the middle in the bottom bin, the two ends of the periphery of the rotating shaft are fixedly connected with connecting gears through pneumatic expansion heads, and a first branching part and a second branching part are installed on the two portions in the bottom bin correspondingly; through mutual energy storage of the first tapping part and the second tapping part, automatic energy storage work can be achieved, compared with traditional equipment, use of a reset motor is omitted, line arrangement is reduced, meanwhile, electric field interference to the circuit breaker when the reset motor works is avoided, the occurrence rate of abnormity is reduced, and circuit safety is facilitated.

The invention relates to the technical field of pole-mounted circuit breakers, and discloses a primary and secondary fusion complete pole-mounted circuit breaker which comprises a shell and further comprises a bottom plate, the shell is arranged on the bottom plate, a first containing groove is formed in the end face, in the length direction, of the bottom plate, a first gradienter is arranged in the first containing groove, and a second gradienter is arranged in the second containing groove. A second containing groove is formed in the end face, in the width direction, of the bottom plate, a second gradienter is arranged in the second containing groove, four supporting legs are arranged below the bottom plate, and an adjusting structure used for adjusting the positions of the supporting legs is arranged on the bottom plate.

The invention relates to the technical field of circuit breakers, and discloses a magnetic control type pole-mounted circuit breaker, which comprises an arc extinguish chamber, a mechanism box, a current transformer and an isolating switch, and is characterized in that the arc extinguish chamber comprises a ceramic airtight shell fixedly mounted on the upper side of the mechanism box, and a fixed contact is fixedly mounted in the ceramic airtight shell; a moving contact is slidably installed in the ceramic airtight shell, a corrugated pipe is fixedly installed in the ceramic airtight shell, the moving contact is fixedly connected with the corrugated pipe, and a sliding rod is slidably installed in the mechanism box. The magnetic control driving mechanism is arranged in the mechanism box to drive the sliding rod to horizontally move left and right, the moving contact is driven to move up and down through the transmission effect of the transmission plate, the moving contact and the fixed contact are kept in a contact or separation state, opening and closing actions of the arc extinguish chamber are achieved, the design structure is simple, a buckle structure for restraining the position of the moving contact is simplified, and the working efficiency is improved. The device has the advantages of low failure rate and sensitive opening and closing actions.

The utility model discloses an intelligent primary and secondary fusion complete pole-mounted circuit breaker, which relates to the technical field of power grid equipment and comprises a base and a plurality of poles, each pole is provided with a first conductive pole and a third conductive pole, and the first conductive pole and the third conductive pole are provided with contacts in vacuum tubes. An insulating column is fixedly connected to the third conductive column, the operating mechanism is arranged in the base, the operating mechanism serves as a power source for driving the insulating column to move, and the operating mechanism comprises an electromagnetic coil, a driving rod, a linkage mechanism and a locking mechanism; the electromagnetic coil is fixed in the base, the driving rod is supported in the base in a sliding mode, and a movable iron core matched with the electromagnetic coil is arranged on the driving rod. The insulating column in each pole is in transmission connection with the driving rod through a linkage mechanism; the locking mechanism comprises a first locking mechanism and a second locking mechanism, and the pole-mounted circuit breaker can effectively reduce the energy consumption of the pole-mounted circuit breaker during working through optimizing the operating mechanism.

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 utility model discloses a primary and secondary fusion complete column-mounted circuit breaker, and belongs to the field of circuit breakers, and the primary and secondary fusion complete column-mounted circuit breaker comprises an equipment box, the top of the equipment box is provided with a jack, an insertion rod is inserted into the inner wall of the jack, the top of the insertion rod is fixedly provided with an arc extinguish chamber, the inner cavity of the equipment box is provided with a placement groove, and the outer side of the equipment box is provided with a through groove. A first wafer is arranged on the inner wall of the containing groove, one end of a spring is fixedly connected to the outer side of the first wafer, a second wafer is fixedly connected to the other end of the spring, a connecting rod is slidably connected to the inner wall of the through groove, two sliding blocks are symmetrically and fixedly assembled on the outer edge of the connecting rod, and two sliding grooves are symmetrically formed in the inner wall of the through groove. According to the invention, the problems that one of the arc extinguish chambers is damaged due to the fact that the structure of an existing device is too fixed, and the other two arc extinguish chambers are inconvenient to disassemble and can only be scrapped together are solved, so that the convenience of the installation and disassembly of the arc extinguish chambers is improved.

The invention relates to the technical field of circuit breakers, in particular to a pole-mounted circuit breaker convenient to install. The pole-mounted circuit breaker convenient to install comprises an installation frame, a circuit breaker body, a positioning plate, a supporting plate, a buffer spring, a V-shaped groove block, a positioning rod and a positioning assembly, the installation frame is fixedly installed on a telegraph pole of an electric power transmission and distribution network through a hoop assembly, and the supporting plate is horizontally installed at the top in the installation frame. Through clamping cooperation of the V-shaped groove blocks on two sides of the positioning plate and the circuit breaker positioning rod, rapid and accurate correction of the horizontal position of the circuit breaker is realized by using the automatic centering characteristic of the V-shaped structure; the circuit breaker can be quickly assembled and disassembled by matching with the clamping connection of the clamping block in the positioning assembly and the clamping groove of the connecting strip, and all the assemblies can be automatically unlocked and reset only by lifting the circuit breaker by virtue of a crane, so that the installation and maintenance time is remarkably shortened, the working efficiency is improved, and the manual operation difficulty and the labor intensity are reduced.

The utility model provides a ring main unit. The ring main unit comprises a gas tank, a fixed frame fixed on the inner side wall of the gas tank, a circuit breaker switch and a three-position switch, wherein the circuit breaker switch and the three-position switch are positioned in the gas tank. The solid-sealed polar pole of the circuit breaker switch comprises a polar pole body, a movable end shielding seat and a static end shielding seat, the movable end shielding seat and the static end shielding seat are located at the two ends of the polar pole body, the movable end shielding seat and the static end shielding seat can wrap the two ends of the polar pole body respectively, and therefore the electrical connection position of the polar pole body is electrically isolated from the external environment; the pole body, the moving end shielding seat and the static end shielding seat are cast into a whole through insulating resin, so that the consistency of the pole is improved; the grounding shielding seat adopts an integrally formed metal piece, and can uniformly wrap a plurality of grounding contacts in a shielding space, so that the electric field distribution of the grounding contacts is optimized. According to the ring main unit, dry air can be used as insulating gas, miniaturization of the ring main unit is achieved, and the corresponding insulating performance is met.

The invention discloses a primary and secondary fusion complete column-mounted circuit breaker, and relates to the technical field of electrical equipment, the primary and secondary fusion complete column-mounted circuit breaker comprises a circuit breaker main body and a plurality of solid-sealed polar poles connected with the circuit breaker, each solid-sealed polar pole comprises a wire inlet side and a wire outlet side, the wire inlet side is connected with a wiring unit, and the wire outlet side is connected with a wire outlet. The wiring unit comprises a connector bar, a wiring bolt and a wiring nut; the wiring bolt movably penetrates through the connector bar and is in threaded connection with the wire inlet side; the wiring nut is in threaded connection with the wiring bolt; the wiring nut is arranged between the connector bar and the wire inlet side; the wiring bar comprises a wiring part and a clamping part connected with the wiring part, the clamping part is sleeved on the rod part of the wiring bolt, one end, far away from the wiring part, of the clamping part is provided with a gap and is connected with a fastener, and the outer sides of the clamping part, the wiring bolt and the wiring nut are jointly coated with a protective sleeve. The wiring stability of the wire inlet side is high, the possibility of electric power accidents is effectively reduced, and the device is stable, reliable and suitable for being applied to places with severe environments.

A primary and secondary fusion complete column-mounted circuit breaker convenient to disassemble and assemble relates to the technical field of electric power engineering and comprises a quick disassembly and assembly mechanism and a quick lifting mechanism. The rapid disassembly and assembly mechanism comprises a triangular support, a pole-mounted circuit breaker, a circuit breaker base, a limiting bottom plate, a sliding rod, a spring, an unfolding assembly and a clamping assembly. The pole-mounted circuit breaker is fixedly installed on the circuit breaker base, a plurality of sliding rods are arranged on the side face of the circuit breaker base, and the sliding rods are in sliding connection with round holes in the limiting bottom plate; during use and installation, the limiting bottom plate can be stretched out and drawn back so as to adapt to the widths of different triangular supports, the circuit breaker base can be stably installed on the triangular supports, meanwhile, after the width, corresponding to the triangular supports, of the limiting bottom plate is adjusted, the clamping plates can slide towards the two sides in a tool-free mode, and the circuit breaker base can be stably installed on the triangular supports. And the round rod on the clamping plate clamps the round hole in the triangular bracket, so that the fixation of the circuit breaker base is completed.

The invention provides a vacuum circuit breaker assembling device, and belongs to the field of electrical switch manufacturing equipment. The vacuum circuit breaker assembling device comprises a tool frame and a support used for supporting a vacuum arc-extinguishing chamber, the support is rotatably arranged on the tool frame, a limiting piece is arranged on the tool frame, a rotation stopping groove is formed in the limiting piece, the orientation of a groove opening of the rotation stopping groove is in a horizontal state, and a moving contact of the vacuum arc-extinguishing chamber can horizontally enter and exit from the rotation stopping groove through the groove opening of the rotation stopping groove. The groove side wall of the rotation stopping groove is provided with a rotation stopping straight wall which is used for being matched with the moving contact of the vacuum arc-extinguishing chamber so as to enable the limiting piece and the moving contact to stop rotation in the circumferential direction, and the tool frame is further provided with a locking structure which is used for locking the limiting piece before the contact pressure spring is assembled and enabling the limiting piece to be unlocked after the contact pressure spring is assembled. The vacuum arc-extinguishing chamber does not need to be horizontally moved after being hoisted, so that the device is simple in overall structure and small in size, and the stability of the vacuum arc-extinguishing chamber can be improved.

The invention provides a GCB arc extinguish chamber disassembly maintenance tool system and a maintenance method thereof. The GCB arc extinguish chamber disassembly maintenance tool system comprises an arc extinguish chamber transfer tool, a static contact transfer tool, a service life measurement tool, a moving arc contact fixing tool, a moving arc contact supporting cover disassembly tool and a guide piston disassembly tool. The arc extinguish chamber transferring tool is used for integrally transferring a GCB arc extinguish chamber and transferring a moving contact module, the static contact transferring tool is used for transferring a static contact module, the service life measuring tool is used for measuring the height of a moving arc contact in the moving contact module, the moving arc contact fixing tool is used for installing and fixing a moving arc contact unit, and the moving contact fixing tool is used for installing and fixing the moving arc contact unit. The moving arc contact supporting cover dismounting tool is used for dismounting a supporting cover on a moving arc contact unit, and the guide piston dismounting tool is used for dismounting a guide piston after a moving arc contact is fixed. A set of maintenance tool is provided through the tool system, and a specific and practical maintenance method is combined, so that efficient, simple, convenient and reliable disassembly maintenance of the GCB arc extinguish chamber is realized.

The invention provides a high-speed grounding switch and a high-voltage switchgear, and the high-speed grounding switch comprises a housing which is provided with an accommodation cavity; the supporting structure is installed on the shell, the supporting structure is provided with a movable cavity, and the movable cavity communicates with the containing cavity; the movable assembly comprises a movable contact, a pull rod and a piston, one end of the movable contact is connected with one end of the pull rod, the movable contact is arranged in the movable cavity, the piston is connected with the pull rod and movably connected with the movable cavity, an air chamber is defined by the piston and the movable cavity, the movable contact is provided with a flow channel, the pull rod is provided with an air channel, and the air channel is communicated with the flow channel and the air chamber; the static end support is arranged in the accommodating cavity, and the static end support is used for being matched with the moving contact; the driving mechanism is used for driving the pull rod to move. The embodiment of the invention can effectively reduce the transmission risk at the joint of the connecting rod and the piston, can simplify the structure, can effectively eliminate the influence of the gap at the joint of the connecting rod and the moving contact on the airflow field, and facilitates the improvement of the smoothness of the airflow field.

The invention belongs to the technical field of circuit breakers, particularly relates to a vacuum arc extinguish chamber replacement mechanism and a calibration structure of a primary and secondary fusion pole-mounted circuit breaker, and provides the following scheme aiming at the problems that an existing vacuum arc extinguish chamber is relatively tedious to mount and dismount and the moving stroke calibration efficiency of a moving contact is low: the vacuum arc extinguish chamber replacement mechanism comprises a circuit breaker body; a plurality of shells are fixed at the top of the circuit breaker body, arc extinguish chambers are placed in the shells, and a plurality of movable conducting rods extending into the shells penetrate through the top of the circuit breaker body in a sliding manner; according to the invention, the lifting of the lifting rods is controlled through the cover plate, so that the installation and disassembly of the arc extinguish chamber can be completed synchronously, the operation is simple, and the connection stability of the moving contact and the static contact at the two ends of the arc extinguish chamber can be ensured in the installation process. The lifting touch panel is controlled to ascend and descend through cooperation of the rotating rod and the lead screw, and the lifting distance of the lifting touch panel is controlled in real time through cooperation of the laser sensor.

The invention belongs to the technical field of pole-mounted circuit breakers in power systems, and particularly relates to a pole-mounted circuit breaker integrating electricity taking and traveling wave distance measurement. The high-voltage fuse is connected with an integrated capacitor or a high-voltage sampling capacitor, and the high-voltage sampling capacitor is arranged on a wire inlet side and a wire outlet side; the integrated capacitor is arranged on the wire inlet side in the A-phase solid-sealed polar pole and the B-phase solid-sealed polar pole, and is arranged on the wire outlet side in the C-phase solid-sealed polar pole; the integrated capacitor is connected with the secondary circuit module in the box body, the capacitors C2 and C3 are connected with the transformer T2 in series, the power frequency electricity taking transformer T1 is connected to the C2 and C3 in parallel, and the secondary side of the T1 is connected with the electricity taking circuit; the protection circuit is connected to the C3 in parallel; and the traveling wave acquisition circuit is connected with the secondary side output winding of the T2. According to the invention, self-power-taking power supply for the power distribution terminal and acquisition of voltage and current traveling wave signals for fault point positioning judgment are realized, the operation efficiency and reliability of the power distribution network are improved, and powerful guarantee is provided for construction of the intelligent power distribution network.

The present invention provides a two-in and two-out DC 1500V disconnect switch, comprising: two contact modules, arranged side by side with the operation module, and multiple modules are assembled by fasteners. The contact module includes a contact module body and a contact assembly arranged inside the contact module body; an operation module, provided with a manual operation mechanism and an electric operation mechanism for controlling the opening or closing of the contact module. In this way, modularization is achieved, the structure is simple, and the assembly is fast and convenient. Moreover, the operation module is provided with a manual operation mechanism and an electric operation mechanism for controlling the opening or closing of the contact module, that is, the opening or closing can be realized manually and electrically, which is beneficial to people's operation.

The invention relates to the technical field of power transmission and distribution switches, and discloses a vacuum bypass switch, which comprises an insulating shell, a static end copper bar, a movable end copper bar, a vacuum switch tube, an insulator, a pull rod and a permanent magnetic mechanism, the pull rod is driven by a magnetic field generated by the permanent magnet assembly to drive the moving end copper bar to move in the direction away from the vacuum switch tube so as to realize opening. The first coil and / or the second coil generate / generates a target magnetic field opposite to the magnetic field generated by the permanent magnet assembly in direction under the power-on effect so as to drive the pull rod to drive the movable end copper bar to move towards the vacuum switch tube, and closing is achieved. Closing is achieved through the first coil and / or the second coil, the problem that closing cannot be achieved due to single-coil faults is avoided, and the problem of thermal runaway caused by continuous energization of the single coil is solved. The invention also discloses a bypass switch control system, which controls the energization of the first coil and the second coil through the first energizing loop and the second energizing loop respectively to ensure the reliable closing of the vacuum bypass switch.

The invention relates to the technical field of pole-mounted circuit breakers, and discloses a primary and secondary fusion pole-mounted circuit breaker convenient to install, the circuit breaker comprises a circuit breaker main body and a control box, support legs are arranged at the bottom of the control box, a quick installation seat is arranged on a bearing beam, and the quick installation seat comprises an installation seat main body; the supporting device comprises a front roller and a rear roller located above the mounting base body, the two ends of the front roller and the rear roller are rotationally connected with two liftable supporting plates, locking structures and reset structures are arranged on the supporting plates, and the rolling direction of the front roller and the rolling direction of the rear roller are perpendicular to the direction of the bearing beam; side baffles are arranged at the positions, on the two sides of the bearing beam, of the bottom of the installation base body, the left and right rolling wheels rotationally connected are installed in the side baffles, and the rolling direction of the left and right rolling wheels is parallel to the direction of the bearing beam. The primary and secondary fusion pole-mounted circuit breaker convenient to install has the advantages of being convenient to install, rapidly adjusting the installation position and being high in installation stability.

The utility model relates to the technical field of electrical switches, in particular to an opening and closing device of a pole-mounted switch, which comprises a shell, a sliding rod, a crankshaft and a connecting rod. The linkage control device further comprises a driving mechanism, and the driving mechanism can drive the crankshaft to swing in a limited mode so as to drive the sliding rod to be switched between the upper limit position and the lower limit position, so that the pole columns are switched between the closed state and the separated state, and the linkage control device has the advantages that linkage control over the multiple pole columns is achieved through a mechanical structure based on the crank connecting rod principle; and the reliability and the convenience of opening and closing control of the pole are greatly improved. Due to the fact that linkage control is achieved, it can be guaranteed that the pole columns can be switched to the needed working state at the same time, and the use reliability and the on-off accuracy of the pole column module are greatly improved.

The invention relates to the technical field of pole-mounted circuit breakers, in particular to a pole-mounted circuit breaker with a protective cover, which comprises a circuit breaker body, the circuit breaker body is detachably connected with the protective cover, the top of the protective cover is provided with a through hole for a cable to pass through, and two opposite side walls of the protective cover are provided with access holes in a penetrating manner. The protective cover is movably provided with a door curtain used for shielding the access hole, the door curtain and the protective cover are both provided with locking structures, and the locking structures are used for locking the door curtain on the protective cover. The circuit breaker body is protected through the protective cover, the operation safety is remarkably improved, the service life of equipment is remarkably prolonged, and the movable door curtain is arranged so that an operator can conveniently overhaul the circuit breaker body.

The present invention discloses an on-off mechanism for handling interphase faults in a dual power supply system. By arranging a first group of single-phase switches including three switches, two single-pole double-throw switches and a second group of single-phase switches including two switches and corresponding driving mechanisms, when an interphase short circuit occurs, one faulty phase can be turned on and the other faulty phase can be connected to the ground or a common conductor at either end of the cut-off point. The invention is also convenient for use with existing screen cabinets and has important practical value.

The invention relates to the technical field of switch devices, and particularly discloses a vacuum parallel switch and a switch cabinet. The vacuum parallel switch comprises an isolation contact, an isolation disconnecting link, a grounding contact, a vacuum arc extinguishing mechanism and a transmission mechanism. The isolation contact is used for being electrically connected with a main bus; the isolation switch is provided with an auxiliary contact. The grounding contact is arranged on one side of the isolation switch and can rotate along a first rotation direction to be contacted with the grounding contact or rotate along a second rotation direction to be contacted with the isolation contact; the vacuum arc-extinguishing mechanism is arranged on the other side of the isolation switch, a static contact of the vacuum arc-extinguishing mechanism is used for being electrically connected with a main bus, and a moving contact of the vacuum arc-extinguishing mechanism can be in contact with the static contact under the action of self-closing force; the transmission mechanism is connected with the moving contact, and in the process that the isolation disconnecting link rotates in the first rotation direction, the auxiliary contact can be clamped with the transmission mechanism, and the moving contact is driven to be separated from the static contact through the transmission mechanism. The vacuum parallel switch is high in use safety and compact in structure.

The present invention belongs to the technical field of circuit breakers, especially the vacuum arc extinguishing chamber replacement mechanism and calibration structure of the primary-secondary integrated pole-mounted circuit breaker. Aiming at the problems of the cumbersome installation and disassembly of the existing vacuum arc extinguishing chamber and the low calibration efficiency of the moving stroke of the moving contact, the following scheme is proposed. It includes a circuit breaker body, and a plurality of shells are fixed on the top of the circuit breaker body. The inside of the shell is used to place the arc extinguishing chamber. A plurality of moving conductive rods that slide through the top of the circuit breaker body and extend into the shell are provided; it also includes two lifting rods that slide on the inner walls of the two sides of the shell away from each other. In the present invention, by controlling the lifting of the lifting rods through the cover plate, the installation and disassembly of the arc extinguishing chamber can be completed synchronously. The operation is simple, and the connection stability of the moving and static contacts at both ends of the arc extinguishing chamber can be ensured during the installation process. In addition, by the cooperation of the rotating rod and the lead screw, the lifting touch plate is controlled to lift, and the lifting distance of the lifting touch plate is grasped in real time with the cooperation of the laser sensor.

The utility model relates to a speed-adjustable vacuum circuit breaker, which comprises a controller, a driving mechanism, a current sensor, a supporting insulator, an insulating pull rod, a moving end conductor, a vacuum arc-extinguishing chamber, a static end conductor and a main cable, and is characterized in that when the current of a main loop of the circuit breaker flows through the main cable, the current sensor transmits the detected current value of the main loop to the controller; the controller analyzes and judges the input main loop current value, when the main loop current value is smaller than a set value, the controller inputs a small-value opening control current to a driving mechanism of the circuit breaker, and at the moment, the driving mechanism drives the circuit breaker to do slow opening motion, so that mechanical shock is reduced; and when the current value of the main loop is greater than or equal to the set value N, the controller inputs a large-value opening control current to the driving mechanism of the circuit breaker, and the driving mechanism drives the circuit breaker to perform rapid opening motion at the moment. According to the utility model, the problems of short service life and high failure rate of the traditional circuit breaker are solved, the operation power consumption of the circuit breaker is reduced, and the purpose of energy conservation is realized.

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.

An underarm gang operated vacuum break switch (underarm switch) has an electrically live portion under a mounting arm, which provides advantages over the standard vacuum break switch, which have the electrically live portion above the mounting arm. Because the non-electrified mounting arm is above the electrified portion, the underarm switch is safer for perching birds and other wildlife. The nature of the underarm switch also provides other benefits including a disconnect blade that when opened creates a visual gap to ensure electrical discontinuity along with a safety locking arm tied to deactivating the underarm switch. Adding to the safety measures is a visual indicator that shows an electrician when the switch is live and safe to open the disconnect blade. Other safety measures include a shock absorber assembly and inertia slowing mass protecting electrical contacts within the vacuum break switch from failing.

The invention provides an arc extinguish chamber detection device and method, and the device comprises a pedestal, the upper surface of the pedestal is provided with a flexible positioning assembly, and the interior of the flexible positioning assembly is provided with a vacuum arc extinguish chamber. The flexible positioning assembly comprises a mounting base, a limiting groove, a double-end lead screw, a driving motor, a positioning arm, two positioning clamping jaws, a positioning ball, a positioning tension spring, four positioning rods and two sliding blocks. And the limiting groove is formed in the mounting seat. The driving motor drives the double-end lead screw to rotate, the double-end lead screw drives the two sliding blocks through threads, the sliding blocks drive the positioning arms, then the two positioning arms can get close to each other, the positioning arms drive the positioning clamping jaws to be attached to the outer wall of the vacuum arc-extinguishing chamber, and therefore the position of the vacuum arc-extinguishing chamber is limited. According to the invention, flexible positioning of the vacuum arc-extinguishing chamber can be realized through the flexible positioning assembly so as to adapt to vacuum arc-extinguishing chambers of different sizes or specifications, and the accuracy and efficiency of vacuum degree detection are ensured.