81results about "Switchgear earthing arrangements" patented technology

The application discloses a kind of on-off mechanism for processing phase-to-phase fault, including two single-pole double-throw switches and a third switch, single-pole double-throw switch includes first arc chamber and second arc chamber, first fixed contact is provided in first arc chamber, second fixed contact is provided in second arc chamber, first composite movable contact is provided between first arc chamber and second arc chamber, first composite movable contact one end is located in first arc chamber, first composite movable contact other end is located in second arc chamber, first composite movable contact is connected with first fixed contact when then is disconnected with second fixed contact, first composite movable contact is connected with second fixed contact when then is disconnected with first fixed contact;Third switch includes third arc chamber, third fixed contact and third movable contact are provided in third arc chamber.The on-off mechanism structure is simple, can realize one fault phase conduction and make another fault phase connect ground or public wire, and it is convenient to be used with existing screen cabinet, with important practical value.

The invention provides an interlocking device for a switch cabinet, the switch cabinet and a method for testing insulation resistance of the switch cabinet, the interlocking device comprises a first switch assembly movably arranged on a handcart chamber, and the first switch assembly is used for opening or closing an operation hole; the program lock assembly is provided with an unlocking key, the program lock assembly is arranged on the handcart chamber, the program lock assembly has an unlocking state and a locking state, when the circuit breaker is located at the test position, the program lock assembly is in the unlocking state so that the unlocking key can be pulled out, and after the unlocking key is pulled out, the program lock assembly is locked. When the circuit breaker is located at the connecting position, the program lock assembly is in a locked state, so that the unlocking key is fixed on the program lock assembly; and the second switch assembly is provided with a lock hole, and the second switch assembly and the program lock assembly share an unlocking key, so that when the circuit breaker is located at the test position and the unlocking key is pulled out, the second switch assembly can open the electricity testing door through the unlocking key.

An electrical contact assembly includes a frame and an electrically conductive frame contact carried by the frame. A conductive clamp assembly is configured to slide on the electrically conductive frame contact into a contact position and clamp into secure electrical contact with the electrically conductive frame contact. The conductive clamp assembly includes opposing electrical contacts spaced apart a distance to receive the electrically conductive frame contact and slide thereon as the conductive clamp assembly moves into the contact position. A spring assembly is engaged to each electrical contact, and a pivot arm engaged with a respective spring assembly and configured to pivot onto the respective spring assembly to bias the respective spring assembly against the respective electrical contact.

The utility model discloses an isolation handcart for a high-voltage switch cabinet, which comprises a handcart body provided with a circuit breaker. The circuit breaker is provided with a moving contact and a fixing piece used for fixing the moving contact, a first fastening piece is arranged in the moving contact, and the first fastening piece penetrates through one end of the moving contact and then is connected with the fixing piece, so that one end of the moving contact is fixed on the circuit breaker; a grounding piece is further arranged on the bottom face of the vehicle body, and the grounding piece is rotationally installed on the bottom face of the vehicle body. Therefore, installation and replacement of the moving contact are simple and convenient, maintenance is convenient, and power failure time can be reduced. Besides, the grounding piece is arranged at the bottom of the vehicle body, so that the whole-course reliable grounding can be realized through frictional contact no matter the switch cabinet is in a running state or a quit state, the electric shock risk caused by static accumulation or fault current is avoided, the residual charge or induced voltage after the equipment is powered off can be quickly discharged, and the safety of maintenance personnel is guaranteed.

The utility model relates to a power distribution cabinet and an interlocking mechanism thereof. The power distribution cabinet comprises a grounding switch and a handcart chamber, and the interlocking mechanism comprises a first rotating shaft which can rotate around the central axis of the first rotating shaft in a first direction and drive the grounding switch to be switched on, and can rotate in a second direction opposite to the first direction and drive the grounding switch to be switched off; a locking member configured to move in response to the rotation of the first rotating shaft along the second direction to restrain the door of the handcart chamber in a closed state, and move in response to the rotation of the first rotating shaft along the first direction to release the restriction on the door; a gear transmission mechanism performing power transmission between the first rotating shaft and the locking member; and the positioning assembly is constructed to move to restrain the rotation of the first rotating shaft in response to the opening of the door and move to release the restrain in response to the closing of the door.

Embodiments of the present disclosure relate to an interlock system for low-voltage, medium-voltage or high-voltage switchgear, the switchgear comprising: - a compartment; - a door; - a door handle; and - a circuit breaker; wherein the door allows access to the interior of the compartment; wherein the door handle is used to open and close the door; wherein the circuit breaker is located in the compartment; wherein the door handle is configured to move from a closed position to an open position; and wherein the interlock system is configured such that: when the door handle is in the closed position, the door is configured not to open, and when the door handle is in the open position, the door is configured to open; and wherein the movement of the door handle from the closed position to the open position is configured to place the circuit breaker in a locked configuration, and wherein in the locked configuration, the circuit breaker cannot be operated.

To shorten a depth dimension in a switchgear of a lightning arrester pull-out device, and facilitate the connection of a cable for grounding a lightning arrester at an installation site.SOLUTION: The lightning arrester pull-out device includes: a fixed frame provided with a ground bar having a ground wire connection terminal and an input bar having an input wire connection terminal insulated by an insulator; and a movable frame equipped with a lightning arrester, an input contact connected to the line side of the lightning arrester and in contact with the input bar, and a ground contact connected to the ground side of the lightning arrester and in contact with the ground bar, wherein the ground wire connection terminal is arranged to protrude from the fixed frame.SELECTED DRAWING: Figure 2

The utility model discloses a special copper guide rail which comprises a linear track frame arranged on the inner side wall of a switch cabinet, and the linear track frame comprises a linear track used for supporting a pulley of a handcart, a grounding copper support used for being in contact with a jointing clamp of the handcart, and an anti-warping support. And a space for accommodating a pulley of the handcart is formed between the anti-warping bracket and the linear rail. According to the utility model, the grounding copper bracket and the anti-warping bracket are combined, so that the grounding copper bracket is only arranged in the electrified connection stroke of the handcart and is used for ensuring grounding, and the anti-warping bracket is used for bearing the handcart and performs respective functions, thereby ensuring the effect of sufficient grounding and the supporting strength of the whole guide rail, and improving the safety of the whole guide rail. And meanwhile, the material cost is also saved.

The utility model relates to a grounding switch mechanism for a centrally installed switchgear. The grounding switch mechanism comprises a first transmission shaft, a connecting seat, a first connecting rod, a first vertical rod, a second connecting rod, a support, a rotating shaft and a grounding switch. The first transmission shaft is horizontally and rotatably arranged at the bottom of the cable chamber, and one end of the first transmission shaft is connected with the driving motor; the connecting seat is fixedly sleeved on the first transmission shaft; one end of the first connecting rod is fixed on the connecting seat; first connecting parts are arranged at the two ends of the first vertical rod, the lower end of the first vertical rod is hinged to the first connecting rod through the first connecting parts, the upper end of the first vertical rod is hinged to the second connecting rod through the first connecting parts, and the first vertical rod is kept vertical all the time; one end of the second connecting rod fixedly sleeves the rotating shaft; the rotating shaft is horizontally and rotatably arranged on the bracket; the grounding knife is fixedly sleeved on the rotating shaft; the circuit breaker is connected with an adapter, and a grounding head of the adapter directly faces the grounding knife. The grounding switch mechanism is arranged in the cable chamber, so that personal safety is protected.

The invention discloses an electric grounding switch operation interlocking device, and belongs to the technical field of switch cabinet equipment. The device comprises a hexagonal operation shaft, and further comprises an interlocking mechanism which comprises a fixing piece and a transverse sliding plate; the driving mechanism comprises an eccentric front interlocking driving plate and an eccentric rear interlocking driving plate which are fixed on the hexagonal operation shaft; and the crank arm connecting rod mechanism comprises a crank arm, and a vertical connecting rod and a transverse connecting rod which are respectively hinged with the crank arm. When a motor of the electric grounding switch drives the hexagonal operation shaft to rotate clockwise to be switched on, the rear interlocking driving plate and the front interlocking driving plate which are installed on the hexagonal operation shaft press and drive the transverse sliding plate to slide in the direction away from the rotating axis, and the front interlocking driving plate finally abuts against and locks the transverse sliding plate, so that when the electric grounding switch is switched on, the transverse sliding plate is locked. And a vertical connecting rod of the crank arm connecting rod mechanism drives the guide rail interlocking mechanism downwards to lock the circuit breaker handcart, so that the interlocking requirement that the circuit breaker handcart cannot be pushed into a working position when the grounding switch is switched on is met.

The invention provides a universal grounding trolley circuit breaker for a centrally installed switchgear, and effectively solves the problems that the whole maintenance working process is tedious, the labor cost and time investment are relatively large and the maintenance efficiency is relatively low due to the lack of uniformity of a circuit breaker of an existing grounding trolley. According to the technical scheme, the grounding handcart comprises a circuit breaker of the grounding handcart, and the circuit breaker comprises a retractable door, a locking shielding plate control module and a support used for installing a moving contact. The right side of the support is provided with a grounding copper bar which is fixed together through a plurality of insulation lightning arresters. A moving contact lifting module and a moving contact phase distance control module are arranged on the bracket; the moving contact lifting module comprises a plurality of lead screw nut mechanisms, nuts are fixed on the bracket, and lead screws are mounted on the retractable door; the grounding trolley is ingenious in structure and multipurpose, the grounding trolley is standardized, the number of spare parts needing to be configured is reduced, the overhaul operation process is optimized, the labor cost and time investment are reduced, and the maintenance and repair cost is reduced; and safe operation stability of a power grid is improved.

The invention discloses a high-voltage metal-enclosed switchgear which comprises a cabinet body made of metal plates, the interior of the cabinet body is divided into a bus chamber for placing buses, a circuit breaker chamber for placing circuit breakers and a cable chamber for placing cables from top to bottom, and a vertical public pressure relief channel is arranged on the right side of the cabinet body. The center line of each corresponding upper contact box and the center line of each corresponding lower contact box are located on the same vertical axis, an upper contact arm and a lower contact arm of the circuit breaker are also located on the vertical axis and stretch out and draw back up and down, and the upper contact arm and the lower contact arm penetrate through the upper valve and the lower valve respectively. And the upper static contact and the lower static contact are respectively connected to form a conductive loop. According to the invention, the size is greatly reduced, the manufacturing cost is reduced, the current-carrying capability is improved, the discharge of the contact arm to the ground and air is effectively prevented, and the safety is better ensured.

This invention relates to a marine medium-voltage DC power distribution device based on a water-cooled solid-state circuit breaker. The top of the cabinet is equipped with pressure relief plates for arc relief channels in the circuit breaker compartment, busbar compartment, and cable compartment. The circuit breaker compartment houses a power electronic switch valve string unit; the diode valve string compartment and IGBT valve string compartment in the power electronic switch valve string unit are connected. The instrument compartment in the upper part of the cabinet houses secondary terminal blocks, circuit breakers, controllers, relays, integrated relay protection devices, fiber optic current transformer junction boxes, electromagnetic locks, and voltage transformers in the cable compartment. The cable compartment includes external copper busbars, current transformers, and voltage transformers. A live display device, voltage transformers, and current transformers are mounted on the busbars. The busbar compartment houses the main busbar and branch busbars. The main busbar connects each functional panel, and each functional panel uses a separate bus tie panel. This design reduces the space volume of the ship's main switchboard while fulfilling the measurement and protection functions of the medium-voltage DC power distribution device's bus tie panel.

The utility model provides a handcart frame and a longitudinal rotation isolation vacuum circuit breaker, the handcart frame comprises a frame cross beam, a pole support, a control mechanism fixing frame and a ground lug, the pole support is vertically arranged at one end of the frame cross beam and is used for being connected with one end of a longitudinal beam; the operating mechanism fixing frame is arranged at the other end of the frame cross beam and used for fixing the operating mechanism, and the grounding piece is installed on the frame cross beam, located between the pole support and the operating mechanism fixing frame and used for being inserted into a grounding clamp on a cabinet body to complete grounding connection when the handcart frame stretches into the cabinet body. The handcart frame is simple in structure and easy to design and process, the grounding sheet is arranged on the frame cross beam and is connected with the grounding clamp on the cabinet body when the handcart is inserted into a proper position in the cabinet body, the grounding structure is simpler, and the connection is convenient and reliable.

An interlocking structure and switch cabinet with a one-button sequential control function. This solves the problem of low safety of existing switch cabinets that only rely on electrical interlocking. It includes a grounding switch, a vehicle body, a grounding operating shaft, a vehicle body operating shaft, a first drive mechanism and a second drive mechanism, a first microswitch, a second microswitch, a first interlocking mechanism and a second interlocking mechanism. The first interlocking mechanism has a first interlocking position and a second unlocking position. The second interlocking mechanism has a first interlocking position and a second unlocking position. When the grounding operating shaft operates the grounding switch to close, the first interlocking mechanism limits the second interlocking mechanism so that the second interlocking mechanism is in the first position. When the vehicle body operating shaft operates the vehicle body to move, the second interlocking mechanism limits the first interlocking mechanism so that the first interlocking mechanism is in the first position. The present invention has the advantages of reliable operation and high safety performance.

The utility model relates to the technical field of medium-voltage switch cabinets, and discloses an anti-misoperation structure of a grounding device of a medium-voltage switch cabinet, which comprises a fixed clamping ring, a connecting assembly movably mounted at one end of the fixed clamping ring, a universal slipknot fixedly mounted at one end of the connecting assembly, and a handcart blocking assembly movably mounted at one end of a stop block transmission assembly. The model number of a medium-voltage switch cabinet is KYN28-12, the fixing ring clamp is installed on a driving main shaft of a matched grounding JN15 of the switch cabinet, when the grounding device carries out switching-on operation, the fixing ring clamp rotates along with the grounding device, pushes the connecting long rod and pushes the inserting rod and the installation block to move through the universal slipknot, then the downwards-concave type stop block is vertically arranged to prevent a circuit breaker handcart from entering, and otherwise, the fixing ring clamp rotates along with the grounding device to push the inserting rod and the installation block to move through the universal slipknot. The fixing ring clamp rotates reversely, the connecting long rod is pulled, the inserting rod and the mounting block are driven through the universal slipknot, the concave stop block is horizontally arranged, a circuit breaker handcart can pass through the concave stop block, the thickness of the concave stop block is increased, a circuit breaker chassis can be effectively and directly blocked, and the circuit breaker is prevented from mistakenly transmitting power to a grounded switch cabinet.

Capacitor 2; -Resistor 3, a first switch 4 operated by a first motor drive 40; a second switch 5 operated by a second motor drive 50; A multilevel converter 1 including: The multilevel converter 1, in which the first switch 1, when closed, connects the capacitor 2 to the resistor 3 and shorts out the resistor 3, and the second switch 5, when closed, connects the capacitor 2 to ground potential 21.

The utility model relates to a centrally installed switchgear convenient for operating a circuit breaker. The centrally installed switchgear comprises a cabinet body and a circuit breaker moving mechanism. An instrument chamber, a circuit breaker chamber and a cable chamber are arranged in the cabinet body; the circuit breaker moving mechanism comprises a base, a lead screw, a moving seat and a circuit breaker; the base is arranged in the circuit breaker chamber; the lead screw is horizontally and rotatably arranged on the base and is arranged along the moving direction of the circuit breaker; the movable seat sleeves the lead screw in a threaded manner; the circuit breaker is mounted on the moving seat; an insertion hole is formed in the outer side end part of the lead screw; a circuit breaker joint is arranged in the cable chamber, and one end of the circuit breaker joint extends into the circuit breaker chamber and directly faces the circuit breaker; and the other end of the circuit breaker joint is provided with a plurality of copper bar interfaces. According to the utility model, the circuit breaker can be quickly and effectively operated to be switched on or switched off.

The utility model discloses a grounding protection structure for a circuit breaker handcart of a direct-current electrical cabinet, which comprises a handcart body movably connected to the upper surface of a handcart bottom plate, a connecting block fixedly connected to the lower surface of the handcart body, a roller rotatably connected to the side surface of the connecting block, and a fixed plate fixedly connected to the lower surface of the handcart body. The lower surface of the fixed plate is fixedly connected with a V-shaped copper bar; the upper surface of the handcart bottom plate is fixedly connected with a support, the upper portion of the support is fixedly connected with a Z-shaped copper bar, the Z-shaped copper bar is detachably connected with the support through an axial screw, the coaxial surface of the axial screw is provided with a spring, the side surface of the axial screw is provided with a nut, and the upper surface of the Z-shaped copper bar is fixedly connected with a grounding flexible wire. By means of the structure, separation and contact grounding work of the V-shaped copper bar and the Z-shaped copper bar are achieved, after the V-shaped copper bar is separated, the Z-shaped copper bar is reset through the spring, and the handcart has the advantages of being simple in structure assembly and convenient to use.

The invention provides an auxiliary handcart of a high-voltage switch cabinet, which comprises a handcart body, three moving contacts and three test terminals, and is characterized in that the three moving contacts are mounted at the front end of the handcart body in an insulating manner, and the three moving contacts are used for being in contact with the three static contacts when the handcart body is pushed into the high-voltage switch cabinet; the rear end of the vehicle body is provided with three test terminals in an insulated manner. Pressing wheels are arranged at the bottom of the trolley body and used for opening a lifting curtain for shielding a static contact when the trolley body is pushed into the high-voltage switch cabinet. According to the implementation mode, when insulation is measured, the three moving contacts are connected with the three test terminals through the insulated wires, and after the vehicle body is pushed into the high-voltage switch cabinet, the insulation is measured through the test terminals; during grounding, the three test terminals are detached, the three moving contacts and the grounding device are connected through a three-phase short-circuit grounding wire, and grounding is completed after the vehicle body is pushed into the high-voltage switch cabinet. During electricity testing, the three moving contacts and the three testing terminals are detached, and after the vehicle body is pushed into the high-voltage switch cabinet, electricity testing is completed.

The invention provides a switch cabinet maintenance interlocking method and a switch cabinet, and relates to the technical field of high-voltage electric appliances. The switch cabinet maintenance interlocking method comprises the steps that a grounding switch in a voltage transformer cabinet is connected to a main bus loop through a three-way contact box, a first lock bolt is arranged corresponding to the grounding switch, and second lock bolts are arranged on circuit breaker large panels of a wire inlet cabinet and a plurality of wire outlet cabinets respectively; after power failure, the second keys lock the corresponding circuit breakers at the experiment positions, the second keys are taken down and inserted into the key exchange box, the first key is unlocked and taken out, the second keys are locked in the key exchange box, the first key unlocks the first lock bolt, and the operating handle of the grounding switch is inserted and operates the grounding switch to be switched on. The main bus is in a grounding state; and then the switch cabinet is overhauled. According to the switch cabinet maintenance interlocking method and the switch cabinet, the safety and the reliability of power system maintenance operation can be improved.

The grounding switch and handcart protection locking device comprises a handcart arranged in a cabinet body and a main shaft used for controlling opening and closing, the handcart comprises a chassis movably installed in the cabinet body, the cabinet body is internally provided with a locking assembly linked with the chassis, the locking assembly comprises a shell, and the shell is internally provided with a grounding switch. A pressing arm linked with the chassis is rotatably arranged in the shell, the other end of the pressing arm is linked with a connecting rod, a limiting part is fixedly arranged on the main shaft, and the connecting rod is driven by the pressing arm to be locked with the limiting part so that the main shaft cannot rotate when the handcart moves to a station position. And when the handcart is at the test position, the connecting rod is unlocked from the limiting part, so that the main shaft can rotate.

The utility model discloses a grounding handcart with a front contact arm based on a KYN28 cabinet, which comprises a panel, a frame bending plate, a chassis and a primary contact arm, the panel and the frame bending plate are respectively and fixedly connected to the chassis, a set distance is formed between the panel and the frame bending plate along the propelling direction of the handcart, and the primary contact arm is arranged on the chassis. The frame bending plate is provided with a connection row used for installing the plurality of primary contact arms. According to the utility model, the panel, the frame bending plate and the chassis are transversely distributed, so that the primary contact arm is adjusted from the rear of the panel end to the front of the frame bending plate, the setting length of the primary contact arm is effectively reduced, the inclination of the contact arm is reduced, and the stability of the handcart is enhanced through the reinforcing structure of the angle plate and the reinforcing plate; the inclination condition of the handcart is further reduced, and the accurate butt joint of the primary contact arm and the static contact is ensured.

The invention relates to the technical field of power supply equipment, in particular to a high-voltage movable switch cabinet which comprises a vertically arranged frame body, and box plates are fixedly connected to the left side and the right side of the frame body through bolts; a control chamber is arranged at the upper end of the front part of the frame body; the upper end of the rear part is provided with a wire inlet chamber in which a bus assembly is arranged; the lower end of the front part is provided with a circuit breaking chamber which is internally provided with a circuit breaking assembly and a valve assembly. A cable chamber is arranged at the lower end of the rear part and is internally provided with a grounding assembly and an on-off assembly; a linkage assembly is further arranged in the frame body, and the linkage assembly is used for achieving action linkage of the circuit breaking assembly and the on-off assembly so as to ensure that the circuit breaking assembly can be pulled out in the power-off state. The grounding assembly comprises a grounding switch, and the grounding switch achieves the on-off operation with the wire bar through the switching-on and switching-off operation of the grounding switch. The on-off assembly comprises a pull rod, and the pull rod pulls the grounding switch to perform rotary opening and closing operation.

The application discloses a three-position operating mechanism for a high-voltage switch cabinet, comprising a first functional part, a second functional part and a lock position assembly; the lock position assembly comprises a rotating movable part; a limiting part and a bearing part are arranged on the two sides of the movable part respectively; the pair of movable parts cooperate to form an opening and closing structure, and the limiting parts and the bearing parts on the two movable parts are staggered and opposite to each other; the first functional part and the second functional part are arranged on the opposite sides of the lock position assembly respectively; the first functional part or the second functional part is in limiting cooperation with the limiting part during movement; the first functional part or the second functional part pushes away the bearing part during movement, drives the limiting part on the other side of the same movable part to be released from limiting; the first functional part and the second functional part need to reach the limiting position to unlock the other one, so that two-section control of the three-position switch is effectively realized, and the operation safety is remarkably improved.

The application relates to an electrical cabinet, and relates to the technical field of electrical cabinets, which comprises a cabinet body, the cabinet body is provided with a front cabinet door and a rear cabinet door, an operating mechanism and a triggering mechanism are arranged in the cabinet body, the operating mechanism comprises guide rails arranged in the cabinet body, a circuit breaker chassis vehicle in sliding connection with the guide rails, and a contact box arranged in the cabinet body, the triggering mechanism comprises a plurality of grounding switches, an insulating cover is arranged between adjacent grounding switches, insulating sleeves are arranged on the outer walls of the grounding switches and the contact box, the triggering mechanism further comprises a driving assembly and a valve interlocking assembly connected with the circuit breaker chassis vehicle, the driving assembly drives a guide rail interlocking assembly and a grounding interlocking assembly. The application can realize the effect that the cabinet body volume of the electrical cabinet is reduced, the components arranged in the cabinet body do not interfere with each other, and the electrical gap still meets the national standard.

The invention relates to the technical field of electrical machinery, in particular to an electricity testing and grounding integrated handcart, which comprises a main body mechanism, a chassis truck, a frame arranged on the chassis truck, an electricity testing contact arm arranged on the frame, a grounding switch arranged on the frame and an electromagnetic push rod arranged on the frame, the adjusting mechanism comprises a cutter fixing block arranged on the frame, a rotating piece arranged on the cutter fixing block and an adjusting piece arranged on the electromagnetic push rod; the start-stop mechanism comprises an abutting block arranged on the grounding switch, an ejection piece arranged on the frame, and a brake piece arranged on the frame; the frame is provided with a front plate, and the frame is provided with a back plate; the electromagnetic push rod comprises a push rod main body and a stop lever arranged on the push rod main body, so that the risk of high-voltage live-line short-circuit grounding is effectively avoided, and the problems of long consumed time and tedious working procedures of electricity testing grounding work are solved.

The application discloses a metal armored draw-out switch device and belongs to the technical field of switch devices. Mainly comprising a cabinet, an opening and closing assembly, the opening and closing assembly is provided with a bottom plate and a mounting cavity; a pushing assembly, the pushing assembly comprises two groups of insertion blocks, two groups of fixed boxes, an inner part of the fixed box is respectively provided with an insertion slot and a mounting slot; two groups of electric cylinders, the electric cylinder is installed in the inside of the mounting slot, the output end of the electric cylinder is provided with a gathering part; two groups of mounting plates, the mounting plate is installed on the inner wall of the mounting cavity, the mounting plate is provided with a sliding rail, one end of the sliding rail is provided with a lower smooth channel, one end of the lower smooth channel is provided with an inclined sliding channel, one end of the inclined sliding channel away from the lower smooth channel is provided with an upper smooth channel. The metal armored draw-out switch device can be separated from the bottom plate after the circuit breaker is closed, the screw rod structure in the bottom plate is prevented from being abraded, and the effect that the circuit breaker is separated from the bottom plate after being closed is achieved.

The invention relates to a mechanical locking device for working positions of an electric grounding switch and a handcart, which comprises an extended pressing plate fixedly connected to a chassis of the handcart, a steering stop block fixedly connected to a grounding interlocking large shaft, a mounting frame fixedly connected in a switch cabinet and a steering baffle plate hinged to the mounting frame, when the handcart is rocked to a working position, the steering baffle plate is pushed to swing through the extension pressing plate, so that the steering baffle plate swings to a swing path of the steering baffle plate when the handcart is switched on, and when the handcart is rocked out of the working position, the grounding interlocking large shaft drives the steering baffle plate to swing towards one side. The anti-misoperation switch cabinet has the advantages that the anti-misoperation capability of the switch cabinet is enhanced, the operation safety of equipment is improved, the structure is simple, the action is reliable, an additional power source is not needed, the maintenance is convenient, the defect that the switch cabinet purely depends on electrical interlocking in the prior art is effectively overcome, and the safety of the switch cabinet is improved. And a dual protection mechanism is provided for the high-voltage switch cabinet.

The invention relates to the technical field of grounding wire clamps, and discloses a short-circuit grounding wire clamp for an obstacle-crossing middle-mounted circuit breaker cabinet, and the short-circuit grounding wire clamp comprises a wire clamp main body, an operating rod, a duplex universal joint, an orientation rod, and a rotating rod. The wire clamp main body is provided with an adjusting rod capable of rotating to adjust the opening size of the wire clamp; the operating rod is connected with the adjusting rod through the duplex universal joint, so that the operating rod can drive the adjusting rod to rotate when rotating, and the operating rod can rotate relative to the adjusting rod; the directional rod is fixedly connected with the wire clamp main body; one end of the rotating rod is connected with the operating rod, and the other end is rotatably connected with the orientation rod; a tightness adjusting piece is arranged on the rotating rod; the tightness adjusting piece can limit the rotation of the rotating rod relative to the directional rod when tightened. The short-circuit grounding wire clamp provided by the scheme can be adapted to middle circuit breaker cabinets of different models, the grounding wire clamp can be rapidly hung, the operation difficulty is reduced, and the operation efficiency is improved.