745results about "Air-break switch details" patented technology

The invention relates to the technical field of electric switches, in particular to an electric disconnecting switch interlocked with a pole-mounted circuit breaker and a control method thereof, and the method comprises the steps: obtaining standard coil current data, actual coil current data, main loop three-phase current data, power side voltage data and load side voltage data, and carrying out the preprocessing; determining time division points by using the wave crest and wave trough distribution characteristics so as to divide stage intervals; the health coefficient of the pole-mounted circuit breaker is obtained through stage interval similarity analysis; calculating an electrical isolation coefficient by combining the main loop current level difference and the bilateral voltage amplitude phase difference; and performing hierarchical interlocking control on the electric isolation switch based on the health coefficient and the electrical isolation coefficient. According to the invention, a two-dimensional evaluation system of mechanism health pre-judgment and electrical isolation hard criteria is constructed through multi-source data fusion, and the safety and reliability of distribution network operation are improved through a hierarchical interlocking control strategy.

The invention provides a 35kV isolation switch opening and closing device. The 35kV isolation switch opening and closing device comprises a substrate, a contact unit, a transmission assembly and a driving unit. The substrate is provided with two composite post insulators which are arranged at an interval; the contact unit comprises a first connecting part and a second connecting part, the first connecting part is connected with one composite post insulator, and the second connecting part can be connected with the other composite post insulator; the transmission assembly is arranged in the vertical direction, and the top end is connected with the second connecting part. The driving unit is connected with the bottom end of the transmission assembly and used for driving the transmission assembly to move in the vertical direction, and the transmission assembly drives the second connecting part to move; wherein the driving unit drives the transmission assembly to move, and the transmission assembly drives the second connecting part to be in contact with or disconnected from the corresponding composite post insulator, so that switching-on or switching-off is realized. The invention provides a 35kV isolation knife switch opening and closing device, and aims to solve the problem of poor safety caused by manual close-range opening and closing of an isolation knife switch in the prior art.

The invention relates to a two-station operating mechanism for a PT (potential transformer) of a C-GIS (gas insulated switchgear), which comprises an operating mechanism box, a centering assembly is mounted in the operating mechanism box, the centering assembly comprises a quick-return crank arm, two sides of the quick-return crank arm are respectively connected with a reset spring guide rod, the other side of each reset spring guide rod extends out of the operating mechanism box, and the other side of each reset spring guide rod extends out of the operating mechanism box. The outer wall of the reset spring guide rod is further sleeved with a reset spring. The operating assembly comprises an operating handle, a mechanical operating transmission shaft and a sealing shaft, the sealing shaft penetrates through the operating mechanism box and then is connected with a bevel gear, the quick-return crank arm is sleeved on the sealing shaft, one side of the mechanical operating transmission shaft is connected with the sealing shaft, the other side of the mechanical operating transmission shaft is connected with the operating handle, and the operating handle drives the sealing shaft to rotate. And the position of the sealing shaft is kept through the cooperation of the centering assembly. According to the operating mechanism, the mechanical operating transmission shaft, the sealing shaft and the bevel gear are driven to rotate by rotating the operating handle, then the PT cabinet transmission mechanism is driven to rotate, and the operating mechanism is simple in structure, low in cost, small in occupied space, easy to operate, safe and reliable.

The invention discloses a reverse operation limiting structure for a slow-acting double-shaft three-station mechanism, which relates to the technical field of accessories of medium-voltage gas insulated metal-enclosed switchgear and comprises a mechanism bracket, a locking part and a limiting part. The mechanism support is rotatably connected with an indication shaft, a grounding operation shaft and an isolation operation shaft, and linkage is realized through a gear set. The locking part is matched with the elastic pin assembly through the locking disc, and locking of the indicating shaft is achieved. The limiting part is of an elastic locking structure, is arranged at the ends, penetrating out of the mechanism front plate, of the grounding operation shaft and the isolation operation shaft, is in an unlocking state when no external force is applied to the operation handle, and can limit the rotation angle of the operation shaft after the external force is applied. The limiting part is arranged at the foremost end of the operation shaft, so that timely and reliable mechanical limiting of reverse misoperation is realized, damage to a mechanism transmission part and a switch body is effectively prevented, and operation safety is guaranteed. The structure is ingenious, the number of parts is small, the occupied space is small, the reliability is remarkably improved, and the cost is reduced.

The invention discloses a linear kick rapid opening and closing control method for an isolating switch, and particularly relates to the technical field of opening and closing control of high-voltage isolating switches. Collecting a linear displacement signal between the conductive arm and the static contact and an electromagnetic driving current change curve, and constructing a kick behavior data matrix; establishing a multi-dimensional state energy threshold model based on the peak acceleration and the zero crossing point; combining a real-time current response curve to complete kick prediction trajectory fitting; fast phase torque compensation is carried out according to the current phase deviation angle, and an active suppression control pulse sequence is generated to realize kick phase locking; a damping recovery coefficient is further calculated based on aftershock feedback, an electromagnetic response factor at the moment of operation is fused, a final control instruction sequence is generated and output to a driving unit, and accurate and high-speed switching-on and switching-off operation is achieved; the method has the advantages of fast control response, strong anti-disturbance capability, high adaptability and the like, and is suitable for accurate control of the isolation switch in various complex power scenes.

The invention discloses a primary and secondary fusion built-in isolation knife circuit breaker, and relates to the field of primary and secondary fusion power distribution equipment for a power distribution network, the primary and secondary fusion built-in isolation knife circuit breaker comprises a pole-mounted circuit breaker and a mechanism box, the body of the pole-mounted circuit breaker is integrated with three current transformers, and the mechanism box is fixedly connected to one side of the pole-mounted circuit breaker; three electrical interface holes used for containing current transformers are formed in the box wall of the mechanism box, an isolation disconnecting link unit is arranged in the mechanism box, the isolation disconnecting link unit is internally arranged and integrated in the mechanism box, the isolation disconnecting link unit and a pole-mounted circuit breaker form an integrated design, the overall structural layout is greatly simplified, the structure is simple, and the cost is low. And the three current transformers integrated on the pole-mounted circuit breaker body are directly butted with the moving contact mechanism through the electrical interface holes preset in the mechanism box, so that the connection is convenient, the contact between the electrical connection part and the external environment is reduced, the erosion of environmental factors such as outdoor wind and rain, dust, corrosive gas and the like is effectively isolated, and the operation stability is ensured.

The invention discloses a 35kV main transformer inlet wire cabinet, and belongs to the technical field of inlet wire cabinets, the 35kV main transformer inlet wire cabinet comprises an inlet wire cabinet body, an inlet wire terminal, an outlet wire terminal, a switch assembly and an inlet wire connecting assembly, the inlet wire terminal and the outlet wire terminal are both fixedly arranged on the inlet wire cabinet body, and the inlet wire terminal and the outlet wire terminal are electrically connected through the switch assembly; and the wire inlet terminal is electrically connected with the wire inlet cable through a wire inlet connecting assembly. The incoming cable is fixed on the incoming terminal of the incoming cabinet body through the incoming connecting assembly, so that the incoming terminal and the incoming cable can be effectively prevented from loosening, the incoming terminal and the incoming cable are fully electrically connected, the conductive sliding sleeve and the plugging conductive sleeve are prevented from colliding, and the operation reliability of the incoming cabinet is effectively improved.

The application provides a control circuit for an isolating switch or grounding switch and GIS equipment, and belongs to the field of GIS equipment, comprising a disconnecting control branch and a closing control branch, wherein the disconnecting control branch is connected with a disconnecting contactor coil in series, is connected with a disconnecting signal input end, and is further connected with a disconnecting holding branch, and the disconnecting holding branch is connected with a positive pole of a control power supply through a normally open contact of a protection relay; the closing control branch is connected with a closing signal input end, is further connected with a closing holding branch, and the closing holding branch is connected with the positive pole of the control power supply through the normally open contact of the protection relay. A protection relay coil and a switch module are connected in series between positive and negative poles of a motor power supply, and the switch module comprises a disconnecting contactor first normally open contact and a closing contactor first normally open contact which are connected in parallel with each other. The starting time of the protection relay is greater than the reset time of the disconnecting contactor and the closing contactor.

The invention relates to the technical field of disconnecting switch locking, and discloses a mechanical locking device for a disconnecting switch. The plurality of insulators are rotationally connected to the bottom frame, the plurality of insulators are arranged at equal intervals along a first plane and are oppositely distributed two by two along a second plane perpendicular to the first plane, and the top ends of the insulators are fixedly connected with electric connection rods; the supporting end is fixedly connected to the bottom frame and located between the two insulators which are oppositely distributed, a supporting seat is fixedly connected to the top face of the supporting end, a groove is formed in one side of the supporting seat, and the two electricity connecting rods are connected into the groove in a sliding mode; the conductive seat is fixedly connected to the middle of the interior of the groove, the two opposite sides of the conductive seat are connected with power connection terminals in a sliding mode, a transmission assembly is arranged in the supporting seat, the transmission end of the transmission assembly is connected with the power connection terminals, and the end, extending into the groove, of the power connection rod is connected with the transmission assembly so that the power connection terminals can abut against the power connection rod. The isolating switch can be effectively and stably supported, and the situation that the isolating switch cannot be effectively powered on due to deformation is reduced.

The utility model discloses an electric disconnecting switch, which is characterized by comprising a base, two groups of insulating terminals are symmetrically arranged on the base, the insulating terminals are fixedly provided with a static contact seat, the static contact seat is provided with a static contact, the base is provided with a rotary contact device, and the rotary contact device is provided with a rotating shaft. The rotary contact device comprises conductive arms, a transmission rod and a rotary drum which are symmetrically arranged, the transmission rod is arranged in the rotary drum, the rotary drum is movably connected with the base, the conductive arms are arranged on the outer side of the rotary drum, a transmission gear is arranged below the base, the transmission gear is connected with the transmission rod, and the transmission gear is connected with a driving motor. According to the utility model, through the arrangement of the rotary contact device, the conductive arm can be rotated and retracted during opening and is far away from the static contact in a relatively limited space, so that the structure is more compact; according to the utility model, a single driving motor is used to realize segmented control of different motion states of unfolding, folding and rotating the conductive arm at a constant speed.

The utility model relates to the technical field of disconnecting switches, and discloses a disconnecting switch which comprises a base, a first supporting column and a second supporting column are arranged on the base, a first tool apron and a second tool apron are arranged on the first supporting column and the second supporting column respectively, a switch blade is rotationally connected to the first tool apron, a rotating assembly is arranged on the switch blade, and the rotating assembly is connected to the second tool apron. The base is rotatably connected with a first rotating shaft, the base is provided with a limiting structure, the limiting structure comprises a first limiting plate, a second limiting plate and a moving rod, the base is rotatably connected with a second rotating shaft, and the second rotating shaft is provided with a grounding assembly. Therefore, the grounding assembly is kept in an opening state, an operator is prevented from mistakenly touching the grounding assembly, the situation that the disconnecting switch and the grounding assembly are closed at the same time is reduced, and the safety of the operator and equipment is further guaranteed.

The utility model provides an interlocking mechanism for a grounding switch and a switch cabinet, and the interlocking mechanism comprises a lock plate which can rotate between an avoiding position and a blocking position, when the lock plate is located at the avoiding position, the lock plate can prevent a rear door from being opened, and when the lock plate is located at the blocking position, the rear door can be opened; when the locking block is located at the first position, the locking block stops the operation main shaft from rotating so as to enable the grounding switch to be kept in a closed state, and when the locking block is located at the second position, the operation main shaft can rotate; the transmission part is connected between the lock plate and the locking block, the locking block is located at the first position when the lock plate is located at the avoiding position, and the locking block is located at the second position when the lock plate is located at the blocking position. According to the interlocking mechanism for the grounding switch, the locking plate and the locking block are arranged, and the two parts are connected through the transmission piece, so that the locking plate can be close to the rear door, the locking block can be close to the grounding switch, and the interlocking reliability is further improved.

The utility model relates to a high-voltage direct-current deicing isolating switch, which is structurally characterized in that a 550KV post insulator and a 35KV post insulator are parallelly arranged at the top of a base, a grading ring is arranged at the top of the 550KV post insulator, a static contact is arranged on the grading ring, and a main knife switch with a bending structure is arranged between the 35KV post insulator and the static contact; a bending control mechanism is arranged at the bottom of the main knife switch; an electric operating mechanism at the bottom of the base is connected with the bending control mechanism through an operating rod; and after the main knife switch is unfolded, the contact plate at the top is plugged with the static contact. According to the structure of the high-voltage direct-current ice-melting isolating switch, the conductive section of the conductive tube is increased, and the through-current capability of a product is improved; the main knife switch adopts a bending structure and has the characteristics of flexible rotation and strong corrosion resistance; the structure of the product is simplified, the later maintenance is facilitated, the maintenance period is prolonged, and the stability of switching-off and switching-on operation after the product runs for many years is ensured.

The application relates to the technical field of electrical connection, in particular to a wiring module and an electrical isolation switch, which comprises a module main body, a common conductive assembly and first and second wiring terminals arranged on the two sides of the module main body respectively. The first wiring terminal comprises an elastic assembly which can press the first external conductor against the common conductive assembly to form an electrical connection. The structure of the second wiring terminal can be combined with that of the first wiring terminal in multiple ways according to actual requirements. The application adopts the elastic assembly for wiring on at least one side, thereby simplifying the wiring operation and improving the installation efficiency. Meanwhile, the continuous pressing force provided by the elastic assembly helps to improve the long-term reliability of the connection. The modular different terminal combinations enhance the application flexibility and market compatibility of the product.

The utility model provides a GIS double grounding isolation knife switch, including base, mounting post, support device, support insulator, conductive system, grounding system, transmission system and operating mechanism, the base is equipped with the mounting post, the mounting post is equipped with the support device, the support device includes the support table and support rib plate, the support rib plate is equipped with the support insulator, the conductive system, the grounding system, the transmission system and the operating mechanism. The supporting rib plate is installed at the bottom of the supporting table, the supporting insulators are arranged on the two sides of the supporting table, the conductive system is located on the tops of the supporting insulators, and the conductive system is connected with the transmission system; the grounding system is mounted on the mounting column and is connected with the transmission system; the transmission system is located on the right side of the base, and the transmission system is connected with the operating mechanism; the operating mechanism comprises a hydraulic device and a control cabinet, the hydraulic device is arranged on the side face of the base, and the control cabinet is arranged in front of the base.

The utility model relates to a gear transmission structure of isolation mechanism, including input gear, intermediate gear and output gear, the input gear and intermediate gear engage, intermediate gear and output gear engage, the central hole one is opened on the input gear, is provided with the clamping slot on the inner wall of central hole, the central hole two is opened on the output gear, and the end of central hole two is provided with the key groove, the tooth number ratio of input gear, intermediate gear and output gear is 1:1:2, the utility model's advantage lies in improving transmission efficiency, improves the stability of transmission, greatly improves the service life of transmission structure, satisfies the strict requirement to high -voltage isolating switch opening and closing time.

The invention provides a control device of power equipment, and relates to the technical field of power equipment control. The operating device of the power equipment comprises a base, a baffle operating assembly and a switch operating assembly. The baffle control assembly is arranged on the base in a sliding mode and used for driving a baffle on the power equipment to slide relative to the power equipment so as to expose an opening in the power equipment. The switch control assembly is arranged on the base, the switch control assembly comprises a switch control piece which is rotatably arranged on the base, and the switch control piece is used for moving towards the interior of the opening when the opening is opened so as to be connected with a switch control part of the grounding switch in the opening and rotating relative to the base so as to control the grounding switch. According to the operating device, the baffle operating assembly and the switch operating assembly are both arranged on the base, when the grounding switch is operated, the two actions of baffle moving and switch operating can be continuously completed without replacing tools, and therefore the effect of improving the operating efficiency is achieved.

The application discloses an indoor three-pole electric single-blade double-throw isolating switch and relates to the technical field of power system equipment. The technical points are as follows: the isolating switch comprises a mounting chassis, the mounting chassis is provided with a first wiring position, a second wiring position, a main-blade operating module, a third wiring position, a ground-blade operating module and a fourth wiring position; one end of the main-blade operating module is connected with the third wiring position, the main-blade operating module is connected with a main-blade driving mechanism, and the main-blade driving mechanism can drive the other end of the main-blade operating module to move between the second wiring position and the first wiring position; the ground-blade operating module is connected with a ground-blade driving mechanism, and the ground-blade driving mechanism is used for driving the ground-blade operating module to move towards the third wiring position with the fourth wiring position when grounding is needed. The isolating switch has the advantages of simple structure, small space occupancy, an electric grounding device arranged at the incoming line side, the ability to meet the requirements of reliability and flexibility of the power system and the ability to improve the safety of equipment maintenance.

The utility model discloses an isolating switch with a protective cover, which comprises an isolating switch main body, a protective auxiliary mechanism is arranged on the outer side of the isolating switch main body, the protective auxiliary mechanism comprises a protective cover main body sleeved on the outer side of the isolating switch main body, and one end of the protective cover main body is fixedly connected with a guide frame. According to the isolating switch with the protective cover, the guide frame rotates around the supporting seat by taking the rotating shaft as a shaft by pressing the protective cover main body, so that the protective cover main body rotates along the threaded rod through the guide groove, the protective cover main body stably rotates to the outer side of the isolating switch main body, and then the fastening nut is tightened, so that the isolating switch can be assembled. The position of the protective cover main body can be limited by limiting the position of the protective cover main body, and the purpose of stably clamping the protective cover main body on the outer side of the isolating switch main body is achieved, so that the protective cover main body plays a role in protecting the isolating switch main body, and the situation that the isolating switch main body is accidentally touched is avoided.

The utility model discloses a high-voltage grounding switch for electric locomotive teaching simulation, which comprises a connecting seat, the top of the connecting seat is rotatably connected with a shaft body, two sides of the shaft body are fixedly connected with a left support and a right support respectively, one end of the left support and one end of the right support are fixedly connected with knife switches, and two sides of the shaft body are connected with knife switches. One end of the connecting seat is fixedly connected with a contact spring piece, the contact spring piece corresponds to the position of the knife switch, a lower cover is arranged at the bottom of the connecting seat, one end of the lower cover is rotatably connected with an operating rod assembly, an interlocking mechanism, a turntable assembly and a connecting rod assembly are arranged in the lower cover, one side of the interlocking mechanism is connected with a lock assembly, and the lower end of the shaft body is connected with the connecting rod assembly. One end of the connecting rod assembly is connected with the turntable assembly, and one end of the turntable assembly is fixedly connected with the operating rod assembly. The appearance size, each part and action interlocking control performance of the device are consistent with those of a real piece, the teaching practical training requirement and the safety requirement are completely met, and meanwhile the cost is greatly reduced.

A layered arrangement type power transmission and transformation line conversion disconnecting switch relates to the technical field of disconnecting switches, and is used for solving the problem that the existing 72.5 kV line conversion disconnecting switch is large in occupied area. Comprising three layers of conductive units and a transmission rod, the conductive units are sequentially arranged from top to bottom, each conductive unit comprises a bottom frame, rotating insulators, a fixed insulator, a contact side conductive tube, a contact finger side conductive tube and a driving mechanism, and the three rotating insulators rotationally connected with the bottom frame are arranged around the fixed insulator; the top of the fixed insulator is connected with three contact finger side conductive tubes in a hinged mode, the top of each rotary insulator is fixedly connected with a contact side conductive tube, the driving mechanism is used for driving the rotary insulators to rotate, and closing is achieved when the contact side conductive tubes and the contact finger side conductive tubes are collinear. And opening is realized when the contact side conductive tube is separated from the contact finger side conductive tube. The multi-pole 72.5 kV line conversion disconnecting switch solves the problem that a conventional multi-pole 72.5 kV line conversion disconnecting switch product is large in occupied area.

The application discloses a three-position mechanism position signal operating mechanism and an isolated grounding switch. The mechanism comprises a top plate and a bottom plate, the top plate is provided with a second position signal device, and the bottom plate is provided with a first position signal device; a transmission device is connected with a driving device at one end and connected with the first position signal device and the second position signal device at the other end; after the operating mechanism receives an operation instruction, the driving device drives the transmission device to drive the first position signal device and the second position signal device to displace respectively, and double signal confirmation is performed. The double signal confirmation mechanism effectively avoids the possible misjudgment of a single signal, improves the accuracy of the position signal, and ensures that the background control system and the protection equipment can perform logical judgment based on accurate data.

This invention relates to the field of electrical switch technology, specifically to a high-voltage switchgear with opening / closing angle detection, comprising a support base, support columns, and conductive arms mounted on the support columns; there are at least two support columns arranged in pairs, and each pair of conductive arms is provided with a contact finger and a conductive head; the contact finger includes a power component, two adjustment components, and two clamping arms. In the initial stage of opening, the power component causes the two clamping arms to rotate and open; in the final stage of closing, the power component causes the two clamping arms to rotate and retract, reducing contact with the conductive head and thus reducing wear. When the clamping arms rotate, the adjustment components cause one clamping arm to extend away from the support column, and the other clamping arm to retract towards its corresponding support column, aligning with the offset direction of the side of the contacting conductive head. There is no relative movement between the contact finger and the conductive head, further reducing frictional wear between them.

The invention provides an isolating switch, and relates to the technical field of low-voltage electric appliances. The first end of the first connecting rod is rotationally connected with the first part of the handle, and the second end is located in the first sliding groove of the shell. The first end of the jump pin is matched with the lock catch, and the middle of the jump pin is rotatably connected to the second end of the first connecting rod. The contact support is located on a rotation path of the second end of the jump pin. And the first end of the second connecting rod is matched with the second part of the handle, and the second end is matched with the contact support. In the process that the handle turns to the closing position, the second end of the first connecting rod moves back to the handle along the first sliding groove, the first connecting rod drives the jump pin to act, the jump pin and the lock catch are locked, the second end of the jump pin abuts against the contact support to move back to the handle, and the disconnecting switch is closed. And when the lock catch is driven to rotate and is unlocked from the jump pin, the contact support moves towards the handle, so that the isolating switch is switched off. According to the invention, independent remote opening can be realized at low cost, and the contact support can push the handle to rotate to the opening position through the second connecting rod during opening.

The invention provides a padlock mechanism of an isolating switch, which comprises a base, a padlock piece and a main shaft, the main shaft is arranged on the base, the main shaft is used for transmitting rotary motion to actuate a contact system of the isolating switch to realize opening and closing, the padlock piece is arranged on the base in a sliding manner, and the padlock piece is arranged on the base. And the padlock piece can slide relative to the main shaft, so that the padlock piece and the main shaft can be switched from a separated state to a clamped state, and the main shaft is switched from a rotatable state relative to the base to a rotary motion which is limited. The padlock piece is clamped with the main shaft, so that the rotation of the main shaft relative to the base is limited, compared with the mode that the rotation of the main shaft is limited through a locking handle, the rotation of the main shaft relative to the base is directly locked through the padlock piece, the locking is more reliable, and the safety is higher.

The utility model relates to a bus socket and a normal pressure switch cabinet, an isolation switch device in a cabinet body is arranged above a vacuum switch unit, the bus socket comprises an insulator and a central conductor, the insulator is provided with a plugging port and a second end portion, the central conductor comprises a plugging conductive rod correspondingly arranged in the plugging port, and the second end portion is provided with a second end portion. The plug-in conducting rod is connected with an electric connecting piece, the electric connecting piece is provided with an electric connecting portion corresponding to the second end portion, the insulator comprises a plug-in seat portion with a plug-in port formed in one end, a 7-shaped connecting lever is integrally formed on one transverse side of the plug-in seat portion and comprises a lateral protruding portion protruding on the transverse side wall of the plug-in seat portion, and the plug-in seat portion is provided with a plug-in port formed in the other end of the plug-in seat portion. The end part of the longitudinal handle part forms a second end part, the longitudinal handle part extends along the direction opposite to the direction of the plugging port, the second end part on the longitudinal handle part is longer than the end part of the plugging seat part, and the longitudinal handle part of the bus socket extends to an electric connection end at the top of the disconnecting switch device and is electrically connected with the electric connection end. The bus socket is reasonable in structural design and convenient to install and use.

A fuse cutout assembly cover including an insulator cover end for positioning over a cutout assembly insulator and including a shield end for shielding a cutout upper contact assembly. The insulator cover is constructed to receive a variety of insulator and cutout assembly configurations.

The invention relates to the technical field of high-voltage disconnecting switches, in particular to a hoop device used for connecting a supporting column of a high-voltage disconnecting switch and a mechanism case, which comprises a first hoop piece, one end of the first hoop piece is a connecting end, the other end of the first hoop piece is a fixed end, and the connecting end of the first hoop piece is connected with the supporting column. The fixed end of the first hoop piece extends in the direction where the mechanism box is located. The second hoop piece comprises a connecting seat and a second hoop which protrudes out of the mounting surface of the connecting seat and is matched with the first hoop piece; a plurality of connecting holes are formed in the connecting seat, and the mechanism box penetrates through the connecting holes through connecting pieces to be connected with the connecting seat, so that the distance between the mechanism box and the second hoop piece can be adjusted; and the second hoop and the fixed end of the first hoop piece are adjustably connected in the direction of the distance between the supporting column and the mechanism box, so that the mounting distance between the supporting column and the mechanism box can be adjusted. The hoop device is simple in structure, high in flexibility and low in reverse machining cost.

The invention relates to a fast earthing switch including two contact members of which at least one contact member is movable along an actuation direction in relation to the other contact member between a closed position, in which the contact members are electrically connected, and an open position, in which the contact members are electrically unconnected, the contact members defining an arcing region in which an arc is generated during a current interrupting operation and in which an arc-quenching medium is present; and an insulating member that is electrically insulating; wherein the movable contact member includes a first channel that at least sectionally extends along the actuation direction, the insulating member includes a second channel that at least sectionally extends along the actuation direction, the insulating member and the movable contact member are coupled to each other and the channels are in fluid communication to direct the arc-quenching medium.