231results about "Switchgear earthing arrangements" patented technology

Arthing equipment for a switchgear is comprised of a movable carrying cart, a switch portion, a manipulating portion, and a voltage detecting device. The earthing equipment is provided with: an upper conductor connected to any one of the movable electrode and the stationary electrode; a lower conductor connected to the other of the movable electrode and the stationary electrode, an earthing wire connecting the lower conductor to a terminal used for earthing of the switchgear; and an adaptor conductor being selectively connected to either a disconnection portion at a bus bar side or a disconnection portion at a cable side of the switchgear and is permitted to be selectively replaced on either upper or lower face of the upper conductor.

The invention discloses a grounding switch operating device of a removable switch cabinet, which consists of a switch operating device and a mechanical linkage device, wherein in the switch operating device, the front part of an operating shaft is movably arranged on a cabinet body, the tail part of the operating shaft is provided with a small bevel gear mashed with a big bevel gear, the big bevel gear is connected with the spindle of a grounding switch and is meshed with a linkage small bevel gear, and the linkage small bevel gear is connected with the linkage shaft of the mechanical linkage mechanism. The device has the characteristics of turning off and on the grounding switch by using bevel gear transmission, realizing the off and on of the grounding switch by simply rotating a small angle, along with capability of being used in combination with various grounding switches, safety and reliability.

Methods, systems, devices for a motorized isolation switch including a switch enclosure with a set of fixed insulated floating input line connectors and output load connectors movably fixed to the rear panel, a removable contactor bucket insertable into the isolation switch enclosure with mating movable insulated line terminals and load terminals and a set of insulated circuit interrupters, a motorized rack and pinion assembly connected to a base of the switch enclosure, coupled for moving a contactor pan connectable to the contactor bucket along a stationary rack gear along the base of the switch enclosure between and switch open position and a switch closed position, an insulating grounding block with ground connectors, the contactor bucket with corresponding movable ground terminals to mate with the insulated ground connectors in the switch open position, and ancillary controls for communicating with remotely located controls to electrically control the operation.

The invention relates to a multifunctional dolly for a 10kV and 35kV dolly-type switch cabinet. The multifunctional dolly comprises a base. A dolly running-in limiting plate, operation buttons, a selective switch and a baffle are arranged on the base. Static contact baffle openers are arranged on two sides of the base. A blocking relay is installed on the dolly running-in limiting plate, the baffle and the base are arranged vertically, an upper row of operating holes and a lower row of operating holes are formed in the baffle, a blocking door is installed on each row of operating holes, the lower ends of the blocking doors are connected with the baffle through hinges, and the upper portions of the blocking doors are movably connected with the baffle through anti-misoperation locks. The multifunctional dolly is reasonable in design, convenient to operate, firm in blocking, long in service life and capable of guaranteeing the smooth completion of safety measures in a working site. The multifunctional dolly has five kinds of protection functions. Due to the fact that the insulating baffle with the upper row of operating holes and the lower row of operating holes is arranged, and each row of operating holes is provided with an anti-misoperation door and a door lock, whether a bus is electrified or not can be detected, reliable electrical blocking measures are provided, and the multiple purposes of electricity testing, grounding and phase checking are realized through the selective switch.

A mechanical device among a cable door, a rear door and an earthing switch which comprises a rear door locking device(21) for locking the rear door of an air insulated switchgear is provided; a rear shaft space-providing component(22) for providing a space-providing space to a rear outer shaft(211); an intermediate force transfer device(23) for transferring the acting force of a rear door closure to an unlock pin(113); and an unlock pin control device(24) for controlling the locking and unlocking of the unlock pin(113). The rear door locking device(21) comprise a rear door lock hook(216) positioned on the rear outer shaft(211) and a rear door lock groove(213) positioned on the rear door, the rear door lock hook(216) and the rear door lock groove(213) can interact to lock the rear door. The rear shaft space-providing component(22) is a C-shaped component(22) which is used for providing space to the rear outer shaft(211) when the earthing switch is switched off. The intermediate force transfer device(23) comprises the rear outer shaft(211) and a rear inner shaft(212), the rear outer shaft(211) is so installed and arranged that the rear outer shaft can rotate with an operation shaft(l ll), a pin(231) is fixed on the rear inner shaft(212) and used for limiting or permitting the insertion of the operation shaft(l ll). The invention ensures not only that the cable door and the rear door of the switchgear cannot be opened when the earthing switch is switched off, but also that the earthing switch can only be operated when both the cable door and the rear door are closed.

Provided herein is an interlock apparatus for preventing the drawing-in or drawing-out of a vacuum circuit breaker main body in interlock with the ground operation of a ground switch in a vacuum circuit breaker, and the ground switch interlock apparatus of the vacuum circuit breaker comprising: a drive spindle for drawing in or out a main body of the vacuum circuit breaker; a movable plate provided with a connection hole of a manipulation handle for rotating the drive spindle to be moved to a manipulation handle connection allowance position for allowing the manipulation handle to be connected to the drive spindle or a manipulation handle connection prohibition position for prohibiting the manipulation handle to be connected to the drive spindle; a first interlock plate connected to the movable plate to be movable to move the movable plate to the manipulation handle connection allowance position or the manipulation handle connection prohibition position; and a second interlock plate to be moved to a lock position for locking the first interlock plate at the manipulation handle connection prohibition position when the ground switch is at a ground position, and to a releasing position for releasing the first interlock plate when the ground switch is not at the ground position.

The invention discloses an integrated handcart with a phase testing function and a bus grounding function for a high-voltage switch cabinet. The integrated handcart comprises a handcart frame, a bus side electricity-conducting arm, a line side electricity-conducting arm, a bus side grounding switch, a valve opening mechanism, a bus grounding switch operating shaft, a handcart pushing mechanism and a high-voltage induction insulator. The handcart frame comprises a bottom frame and a vertical frame, wherein the vertical frame is vertically fixed to the bottom frame; a plurality of idler wheels are arranged on the bottom frame so that the handcar can move in the switch cabinet; the valve opening mechanism is fixed to the bottom frame, and the line side electricity-conducting arm is fixedly arranged above the valve opening mechanism; the bottom frame is further provided with the pushing mechanism so that the handcart can be pushed into or pulled out of the switch cabinet conveniently; the bus side grounding switch, the bus grounding switch operating shaft and the high-voltage induction insulator are arranged on the vertical frame; the bus side electricity-conducting arm is arranged on the high-voltage induction insulator. The integrated handcart with the phase testing function and the bus grounding function for the high-voltage switch cabinet has the advantages of being capable of improving safety of an operator and testing efficiency, reducing safety risks, and lowering cost, being safe and reliable and the like.

A removable electrical power cell including an incoming electrical source connector with a circuit interrupting device and an electrically isolated outgoing electrical load connector, an electro-mechanical switching assembly connected to a movable disconnect switch to move the disconnect switch between an open and grounded position and a closed and energized position and a controller to provide an input signal for controlling the operation of the electro-mechanical switching assembly to control an operation of the removable electrical power cell. The electro-mechanical switching assembly includes a rack and pinion switching assembly and a lockout limit switch to control operation of the automatic power switching assembly. The electro-mechanical switching assembly including a motor driven switching assembly to automatically open and close the high voltage power isolation switch based on an incoming signal. The motorized removal power cell including a lock out assembly to prevent removing the power cell when closed and energized.

The invention relates to a movable arc-suppression harmonic elimination device comprising a cabinet shell. A closed space formed by enclosing the cabinet shell is divided by a metal partition board into a main bus chamber, an earthed switch chamber, a voltage transformer chamber and a secondary meter chamber, wherein the main bus chamber is positioned behind the cabinet shell; the secondary meter chamber, the voltage transformer chamber and the earthed switch chamber are sequentially arranged in front of the cabinet shell from the top to bottom; and an isolated handcart is arranged in the voltage transformer chamber, provided with a voltage transformer and a high-voltage fuse and pushed into a cabinet body along a guide rail or pulled out of the cabinet body. By using a middle part of the front of a KYN28 type switch cabinet body as an isolated handcart chamber, arranging the isolated handcart which is provided with the voltage transformer and the high-voltage fuse and used as a movable component in the isolated handcart chamber and using an outgoing line cable chamber as the earthed switch chamber, the invention solves the problem of layout space of element which cannot be overstepped by a miniaturized protective device and simultaneously ensures normal play of protecting function.

The invention discloses a ground connection vehicle and a ground connection method for a middle type switch cabinet. The ground connection vehicle comprises a chassis vehicle, a base, three pole columns, three electrified sensors, three upper contact arms, an electrified displayer, a ground connection device, an electromagnet controller and a control circuit. The three electrified sensors are respectively opposite to the three pole columns and are arranged at intervals relative to the three pole columns. The ground connection device comprises a switch-on coil for electric switch on and a switch-on button for manual switch on. The electromagnetic controller comprises a blocking shaft for controlling the switch-on button and a latching electromagnet for controlling the blocking shaft to extend out and draw back. The control circuit is electrically connected with the switch-on coil and the latching electromagnet. Furthermore, the control circuit can be automatically switched off when the electrified sensors sense that the control circuit is electrified, the switch-on coil and the latching electromagnet are both prompted to loss electricity, and the blocking shaft can extend out to clamp the switch-on button when losing attraction of the latching electromagnet. The ground connection vehicle has an electricity verifying function and is better in safety, higher in reliability and more convenient to operate.

The invention discloses a multifunctional trolley of a switch cabinet. The multifunctional trolley comprises a trolley body, three upper contact arms and three lower contact arms, wherein the rear ends of the upper and the lower contact arms are fixed on the inner side of the trolley box respectively; front ends of the upper contact arms are fixedly connected with upper moving contacts respectively; front ends of the lower contact arms are fixedly connected with lower moving contacts; insulation sleeve boxes are sheathed on the front ends of the upper and the lower contact arms respectively; rear ends of the upper and the lower contact arms are internally provided with a sensor respectively; the external side of the trolley body is provided with a live display and an earthing knifeswitch; the inner side of the trolley body is also provided with an earthing bar of which the upside is hinged with one end of the earthing knifeswtich and the downside of the earthing knifeswitch is connected with the trolley body; and when the earthing knifeswitch is switched on, the other end of the earthing knifeswtich is connected with an upper contact arm connection seat. The multifunctional trolley is simple in structure and low in cost and is convenient to maintain and detect. The multifunctional trolley disclosed by the invention integrates the earthing function and the electricity check function and can serve multiple purposes, thus reducing manufacturing cost and avoiding waste caused by the configuration of multiple trolleys.

The invention discloses a solid insulated high-voltage vacuum switch cabinet utilizing an environment-friendly gas, wherein the solid insulated high-voltage vacuum switch cabinet comprises a low voltage chamber, a vacuum circuit breaker chamber, a cable chamber, a decompression chamber and a main circuit gas filled compartment; the main circuit gas filled compartment is installed on the back upper part of a cabinet body to form an internal and external double-layer structure with a switch cabinet shell, dry air is filled in the double-layer structure, the vacuum circuit breaker chamber is located in the front middle part of the cabinet body; and an operating mechanism of a three-station isolating/earthing switch, the vacuum circuit breaker chamber with a fixing and sealing post terminal, a handcart and an airtight instrument are installed in the cabinet body. The cabinet body disclosed by the invention omits the SF6 gas harmful to the environment, and the gas filled compartment is insulated by the dry air, therefore, the solid insulated high-voltage vacuum switch cabinet has the advantages of flexible expandability, compact structure, long service life, non maintenance and small volume, and can meet the power consumption demands of areas, industrial and mining enterprises, transformer substations, subways, light railways and railways having tense land, narrow spaces and high demands on reliability.

The invention discloses a novel handcart grounding device of a switch cabinet, which comprises a handcart grounding contact, a cabinet body grounding bar and a fixing board, wherein the handcart grounding contact comprises a handcart grounding bar, a handcart grounding strip I, a handcart grounding strip II, a spring I, a spring II, a bolt I and a bolt II; the fixing board is fixed on a cabinet body bottom board, and the cabinet body grounding bar is fixed on the fixing board; and the handcart grounding contact is fixed on the front end surface of the high-voltage side of a handcart bottom board. The invention has the characteristics of low integral cost, strong matching property, high electrical parameters, strong generality and the like; and when a handcart is pushed in or pulled out, the precise positioning of the handcart can be realized by the interaction between the handcart grounding contact and the cabinet body grounding bar.

An earthing switch for a medium voltage switchgear comprising a plurality of fixed contacts, a plurality of movable contact surfaces which are suitable to contact said plurality of fixed contacts and a support structure suitable to support moving means which allow the movement of said second plurality of contact surfaces. The earthing switch comprises at least one guide which comprises a fixed element and a moving element coaxially coupled therewith, said moving element being operatively connected to said movable contact surfaces so as to allow their movement along a substantially rectilinear direction from a first position, corresponding to an open condition of said switch, to a second position corresponding to a closed condition of said switch.

A switch gear constructed such that a switching device and the operating shaft (10) therefor are housed in a case (1), with the switching device being switched on/off by inserting an operating handle (11) into a insertion port (12) from the outside and rotating the operating shaft (10), the switch gear being equipped with an interlock mechanism having: a shutter (13) that opens/closes the insertion port (12); a first cam (17) attached to a camshaft (16) that rotates in conjunction with the rotation of the operating shaft (10); a second cam (18) that rotates in conjunction with the switching of the shutter (13); a first lock (14), which can be locked by the engagement of a latch with recessed parts provided on both cams (17, 18), when the switching device is "off" and the shutter (13) is "closed"; and a second lock (15), which can be locked by the engagement of a latch with the recessed parts provided on both cams (17, 18), when the switching device is "on" and the shutter is "closed".

The invention discloses an environment-friendly high-voltage switchgear, which comprises a cabinet body. The cabinet body is composed of a low-voltage instrument room, a circuit breaker handcart room, a high-voltage bus room, a high-voltage cable room, and a small bus room. Metal partitions are used between the rooms Completely closed, the handcart room of the circuit breaker is equipped with a handcart circuit breaker, the high-voltage bus room is equipped with an upper contact box, and the high-voltage cable room is equipped with a lower contact box, a current transformer, and a grounding switch. The device is respectively connected with the static contacts in the upper contact box and the lower contact box, the static contacts in the upper contact box are connected with the main busbar through the upper lead busbar, the main busbar is arranged in the wall bushing, and the The wall bushing passes through and is fixed on the cabinet body, the static contact in the lower contact box is connected to the current transformer through the lower busbar, and the current transformer is connected to the grounding switch. All insulating parts of the present invention are made of PA66+glass fiber, which is used to replace traditional epoxy resin insulating parts, and fully meets the electrical performance of high-voltage switchgear.

A terminal for an electrical switchgear, the terminal comprises a housing arrangement (3) comprising an electrically insulating material and having an inner surface defining a cavity; and a first terminal electrical contact (61) contained in the housing arrangement for making an electrical connection with an electrical component (41) insertable into the cavity The first terminal electrical contact is located in a first recess (40) formed in the inner surface and is flush with the inner surface of the housing arrangement.

The invention relates to a novel centrally-arranged switch cabinet grounding device which comprises a handcart and a switch cabinet and is characterized in that a grounding device is respectively arranged at two sides of the lower part of the handcart, and grounding copper bars are arranged on two surfaces of the inner side of the switch cabinet opposite to the grounding devices at the two sides of the lower part of the handcart. The grounding devices comprise thick copper bars, copper belts, fixed brackets and pressure springs, wherein the pressure springs are arranged in the fixed brackets; the bottoms of the fixed brackets are connected with the handcart; the copper belts which are in an isosceles trapezoid are arranged on the fixed brackets; the inner sides of the copper belts are in contact with the pressure springs; the bottoms of the two ends of the copper belts are connected with the body of the handcart; and the thick copper bars which are folded into an arch form are coated outside the copper belts. The invention has the advantage that the two sides of the grounding devices are uniformly stressed symmetrically to perform a guiding function when the handcart moves inwards or outwards, so that the handcart can operate more stably and smoothly in the cabinet. The novel grounding device overcomes the defects and the disadvantages of the traditional grounding device and successfully passes the grounding loop test of the national laboratory.

The invention discloses an electric inspection grounding handcart for a main busbar and a feeder branch. The high-voltage sensor has a live display on the panel, and a grounding interlock mechanism is set on the bracket. The handcart of the circuit breaker integrates the functions of electricity inspection and grounding, and is practical and convenient to operate; a three-phase live display is installed on the handcart panel, and the power and no power can be observed intuitively; there is a grounding interlock between the grounding switch and the handcart rollers. When the grounding switch is in the closed position, the rollers are stuck, and the switch cabinet cannot be pushed forward, which meets the five-proof requirements of machinery. It is suitable for power inspection and grounding of the main bus bar end and feeder branch end of the switch cabinet.

An intelligent Internet of Things high-explosive switch comprises an explosion-proof shell arranged on a base, a front cavity and a rear cavity are arranged in the explosion-proof shell, primary equipment, a protector and a circuit breaker are arranged in the front cavity, the protector is connected with the primary equipment and the circuit breaker, the rear cavity comprises a wiring cavity and a grounding knife-switch cavity, and the wiring cavity is connected with the grounding knife-switch cavity. A cable connector is arranged in the wiring cavity, a grounding knife is arranged in the grounding knife cavity, and the intelligent power distribution cabinet further comprises an Internet of Things communication management machine, a thermal imager, a temperature and humidity sensor, a heating and dehumidifying device and a plurality of temperature measurement sensors arranged on contacts of the circuit breaker and the cable connector respectively. According to the invention, on-line diagnosis can be carried out on the breaking capacity of the circuit breaker, intelligent dehumidification can be carried out, fault diagnosis can be carried out based on the contact condition of each contact of the circuit breaker and a cable joint, fault elimination is facilitated, and the safety is high.

An electrical switchgear comprises a front, a back and a switch arrangement. The switch arrangement comprises a terminal arrangement comprising an electrical contact for a bus and an electrical contact for a load connection which are spaced apart along an axial direction; and a device that is driveable into said terminal arrangement to a service position to make an electrical connection between said electrical contact for said load connection and said electrical connection for said bus. The electrical contact for said load connection is located closer to said back of said switchgear than is said electrical contact for said bus.

A door interlock device for a power transformer room in a vacuum circuit breaker includes a cam disposed on a shaft of a ground switch, a supporter disposed on a side plate of a power transformer room, a shaft disposed at the supporter to be slidable and having one end contacting the cam to be upward and downward movable, a spring disposed within the supporter to provide an upward elastic force to the shaft, and an interlock plate disposed at one side of the power transformer room door and configured to be in contact with the shaft, wherein the transformer room door is not allowed to move when the interlock plate is restricted by the shaft, but the power transformer room door is allowed to move when the interlock plate is released from the restriction of the shaft. The door interlock device for a power transformer room is capable of securing the safety of a user by providing the door to be opened only in a ground condition.

The invention discloses a grounding device of a metal-clad moveable high-voltage switchgear, which comprises a handcart (1) and guide rails (3) arranged on a body of a switchgear for the handcart (1) to run on, wherein the handcart (1) and the grounding device of the high-voltage switchgear adopt a clamp type connection structure. According to the technical scheme, when the handcart is swung to a work position from a test position by a swing mechanism, the grounded connection structures are tightly occluded together in a gliding process or a work state, so the contact resistance is greatly reduced, the safety of operators is further guaranteed and the requirements on electric grounding safety of the switchgear are completely met. The combined use of a plurality of grounding ways makes the grounding performance of the grounding device of the metal-clad moveable high-voltage switchgear; and the plurality of grounding ways can be freely and flexibly selected.

The invention relates to the technical field of power grid operation devices, in particular to a ground wire special for a middle switch cabinet. The ground wire special for the middle switch cabinet is composed of a ground wire clamp, a ground annealed copper wire, an insulating operating bar and a metal head, wherein the cylindrical aluminum metal head is arranged on the top of the insulating operating bar, the insulating operating bar is connected to the cylindrical aluminum metal head in a compact pressing mode, two rows of contact holes which are corresponding in position are annularly and evenly formed in the cylindrical aluminum metal head, elastic metal ball contacts are arranged in the contact holes, a fixing hole is formed between every two adjacent contact holes of each row, protrusions corresponding to the fixing holes are arranged in a lower static contact in the middle switch cabinet, a pressing connection position connected with the ground annealed copper wire is arranged at the bottom of the cylindrical aluminum metal head, the ground terminal of the ground wire special for the middle switch cabinet is connected with the ground wire clamp, and an electricity connection terminal is connected to the cylindrical aluminum metal head through the ground annealed copper wire. Compared with a fixed type ground wire, the ground wire special for the middle switch cabinet has the advantages of being more convenient to use, clearer in grounding point and higher in safety reliability.