316results about "Earthing switches" patented technology

An apparatus for use in a power delivery system, the apparatus comprising: a DC circuit breaker having first and second terminals and configured to automatically switch from a closed state to an open state during an overcurrent condition; a disconnector switch in series with the DC circuit breaker, the disconnector switch having a first terminal for connecting to a first polarity terminal of a DC power supply, a second terminal for connecting to a second polarity terminal of the DC power supply and a common terminal connected to the first terminal of the DC circuit breaker, the disconnector switch having at least a first position in which the first terminal is connected to the common terminal and a second position in which the second terminal is connected to the common terminal; and an interlock mechanism coupled to the DC circuit breaker and the disconnector switch, the interlock mechanism configured to disable the DC circuit breaker from automatically switching from the closed state to the open state during the overcurrent condition when the disconnector switch is in the second position.

The present invention discloses a three-position switch. An innovative fast direct-acting three-position switch is used, so that a moving grounding contact is separated from a moving isolating contact, and contact ablation after closing of a grounding short-circuit current does not affect flow of a main circuit, thereby improving closing capacity. During opening, the moving isolating contact and the moving grounding contact are respectively shielded by a shielding cover, and arc ablation of the contact does not affect insulating performance of a clearance. A three-phase moving isolating contact and a three-phase moving grounding contact are simultaneously driven by a transmission shaft, thereby ensuring synchronization of three phases. A linear motion of the moving grounding contact and the moving isolating contact is implemented through rotation of a three-position insulating spindle, and switching of actions such as closing, opening, and grounding of the three-position switch is implemented. The present invention further discloses a gas box using the switch.

The invention belongs to the technical field of high-voltage switch equipment, and discloses a grounding switch contact system, which comprises a static contact assembly, a moving contact assembly and an insulating cylinder, the static contact assembly comprises a static arc contact, the moving contact assembly comprises a moving contact body, a cylinder body and a piston, the moving contact body is provided with a contact cavity, and the insulating cylinder is provided with an insulating cylinder. The moving contact body and the piston are fixedly connected and are jointly arranged in the cylinder body in a sliding mode, an air chamber is formed between the piston and the cylinder body, the moving contact body is arranged in the arc extinguishing cavity of the insulating cylinder in a sliding and penetrating mode, and the moving contact body is provided with a first through hole, an air channel and a second through hole; the second end of the first through hole penetrates through the outer side wall of the moving contact body and is finally arranged outside the insulating cylinder and the air chamber, the two ends of the air channel are communicated with the air chamber and the second through hole respectively, and the second end of the second through hole penetrates through the outer side wall of the moving contact body and is always arranged in the arc extinguishing cavity. The system not only can ensure accelerated recovery of the arc gap insulating gas, but also can ensure effective heat dissipation of the arc gap, and effectively promotes arc extinguishing.

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 an indoor high-voltage grounding switch, which comprises a vacuum box body, a lock rod, a power connection seat and an electromagnetic driving assembly, and is characterized in that one side of the vacuum box body is connected with a sealing cover box, and the sealing cover box is internally provided with a guide rod and a detonation protection mechanism; the electromagnetic driving assembly slides along the guide rod and drives the lock rod to move, and the lock rod is connected with the access electrode through the first insulating terminal; the power connection seat comprises a shaft frame, a movable guide frame, a threaded sleeve ring and a rotating seat, the threaded sleeve ring is in threaded connection with the lock rod, and a second insulating terminal and a grounding electrode are arranged on the rotating seat to realize circuit grounding. The detonating protection mechanism comprises a fixed cylinder, a plunger rod, a short-circuit control electrode and a detonating explosive, and triggers an explosion to push the lock rod to be grounded forcibly in an abnormal state. The device has a dual-trigger control mode, can be driven by an electromagnetic assembly in a conventional state, realizes emergency grounding through explosion gas in an abnormal state, and is quick in response; meanwhile, the contact stability is enhanced through a thread locking structure, and the system safety and reliability are improved.

The invention discloses a three-station mechanism position signal operating mechanism and an isolation 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; one end of the transmission device is connected with the driving device, and the other end is connected with the first position signal device and the second position signal device; and after the operating mechanism receives an operation instruction, the driving device drives the transmission device to respectively drive the first position signal device and the second position signal device to displace, and double-signal confirmation is carried out. The double-signal confirmation mechanism effectively avoids misjudgment possibly caused by a single signal, improves the accuracy of a position signal, and ensures that a background control system and protection equipment can carry out logic judgment based on accurate data.

The embodiment of the invention relates to a three-position switch and a corresponding switch cabinet. The three-position switch generally comprises an isolating contact, a grounding contact and a moving contact. The moving contact includes a first end and a second end. The first end is connected with the base, the second end is opposite to the first end along the longitudinal extension direction of the moving contact, rotates around the first end along with the moving contact, and is switched among a switching-on station in contact with the isolating contact, a grounding station in contact with the grounding contact and a switching-off station out of contact with both the isolating contact and the grounding contact. The second end is provided with a first protrusion and an arc-resistant component. The first protrusion protrudes from the main surface of the moving contact and makes contact with the isolation contact when the second end is located at the switching-on station. An arc resistant member is disposed proximate the first protrusion and configured to withstand an arc when the first protrusion is proximate the ground contact. According to the embodiment of the invention, the moving contact is correspondingly modified, so that the consistency of the contact resistance before and after the experiment can be ensured.

The invention discloses a three-contact manual ground wire ice-melting grounding knife-switch and a use method of the three-contact manual ground wire ice-melting grounding knife-switch. The grounding knife switch comprises a base, one end of the base is provided with a first post insulator, the upper end of the first post insulator is provided with a static contact, and the static contact is provided with a supporting seat; a first supporting frame is arranged at the other end of the base, a second supporting insulator is arranged on the first supporting frame, and a moving contact is arranged on the second supporting insulator; a second support frame is arranged at one end, close to the first support frame, of the base; a grounding contact is arranged on the second support frame; the supporting seat is rotatably connected with a contact knife, the contact knife is provided with a pull ring plate, and the other end of the contact knife is matched with a grounding contact or a moving contact. According to the invention, the switch-on of the ice-melting power supply is realized through the switch-on of the disconnecting link, the grounding of the insulated ground wire is realized through the switch-off of the disconnecting link, only one switching operation is needed, the electrical disconnection with the ice-melting ground wire side can be realized when the ice-melting power supply wire is connected or disconnected, an operator is prevented from bearing the induced voltage of the ground wire, the structure is simple, and the operation is convenient and safe.

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 present invention discloses an extra-high voltage earthing switch, belonging to the technical field of high-voltage equipment, aiming to solve the problem of excessive partial discharge of the existing earthing switch due to structural defects. Oil is filled in the insulating sleeve of each earthing switch unit, which can effectively isolate the external air, prevent the external air from entering the interior of the earthing switch unit, improve the internal insulation strength of the earthing switch unit, control the partial discharge amount, and at the same time protect the earthing switch unit from being affected by moisture. A grading resistor is also connected in parallel between adjacent fixed support plates to ensure the consistency of the voltage between the plate assemblies and prevent the generation of voltage difference. When the moving plate and the fixed plate of the plate assembly are in contact, it is surface-to-surface contact to increase the contact area and prevent the generation of cavity discharge. The start and stop of the earthing switch unit are realized by driving the push rod through the closing drive device, the action time is shortened, and the efficiency is greatly improved while ensuring safety. The present invention is applicable to extra-high voltage earthing switches.

A method for assembling a switching apparatus for medium voltage electric systems characterized in that it comprises the following steps: - for each electric pole of said switching apparatus, providing a mounting assembly, said mounting assembly comprising: - providing a first semi-finished structure of said switching apparatus, wherein said first semi-finished structure comprises, for each electric pole of said switching apparatus, a first pole terminal and a first fixed contact electrically connected to said first pole terminal; - for each electric pole of said switching apparatus, installing said mounting assembly on said first semi-finished structure.

The invention relates to a double-fracture isolation grounding switch with position indication, which comprises a shell, a three-phase switch body is arranged in the shell, any switch body comprises a first static contact seat, a first moving contact, a second static contact seat and a second moving contact, the first moving contact is electrically connected with the second moving contact, and the second moving contact is electrically connected with the first static contact seat. A driving device is also arranged in the shell, the driving device respectively drives the first static contact seat and the first moving contact as well as the second static contact seat and the second moving contact to be electrically connected or separated to form two fractures, and the switch body also comprises a grounding switch which is driven by the driving device to open and close; the invention further comprises an extension installation mode, the bus is connected in series with the double-fracture isolation grounding switch with the position indication during installation and testing, the three-phase switch bodies are all disconnected, and the grounding switch is grounded. The device has the effect that the situation that the whole bus is powered off due to the fact that an isolation fracture or an isolation switch is broken down when the bus end is expanded or in a voltage withstand test after expansion is completed is reduced.

The invention belongs to the field of power transmission and distribution, and discloses a structure capable of generating self-thrust, a circuit breaker, an isolating switch, a load switch and a grounding switch, the self-thrust structure comprises a shell, a first air inflation chamber and an air cylinder barrel are arranged in the shell, a piston is installed in the first air inflation chamber and movably connected with the air cylinder barrel, the piston is provided with a nozzle, and a pull rod is movably installed in the center of the air cylinder barrel. And the pull rod is fixedly connected with the piston, the direction of pulling the pull rod is used as an opening direction, and the direction of pushing the pull rod is used as a closing direction. The boosting air chamber is arranged, so that air generated by electric arcs is fully utilized to push the partition plate B to move, the pull rod is driven to move, finally the piston is pushed to move, the pressure difference between the compression air chamber and the first inflation chamber is counteracted, the requirement for operating work of an external operating mechanism is lowered, and meanwhile the problem that when large current is cut off, the pressure difference is too large can be solved. Therefore, the problem of stagnation and even rebound caused by insufficient operation work can be solved, and the success of on-off can be ensured.

A visual indicator for an electrical assembly, the electrical assembly including a housing, and an electrical discharge mechanism arranged within the housing; the electrical discharge mechanism configured such that movement of the electrical discharge mechanism from a first position to a second position allows electrical components of the electrical assembly to electrically discharge. The visual indicator includes a display component arranged to display a visual indication external to the housing; and a mechanical coupling means configured to mechanically couple the display component to the electrical discharge mechanism, such that movement of the electrical discharge mechanism causes movement of the visual indication of the display component. When the electrical discharge mechanism is in the first position, the display component displays a first visual indication, and when the electrical discharge mechanism is in the second position, the display component displays a second visual indication.

The invention belongs to the technical field of power distribution switches, and discloses a mechanical interlocking device and a gas-insulated switchgear, the mechanical interlocking device comprises a three-position switch, a circuit breaker and two mechanical locks, the two mechanical locks together lock a rear door of the gas-insulated switchgear, a disconnecting link of the three-position switch is connected with one of the mechanical locks through a first connecting rope, and the other mechanical lock is connected with a second connecting rope. When the disconnecting link of the three-position switch is adjusted to a grounding position, the mechanical lock connected with the three-position switch can be converted from a locking state to an unlocking state; and the switch of the circuit breaker is connected with the other mechanical lock through a second connecting rope, and when the circuit breaker is in a closed state, the mechanical lock connected with the circuit breaker can be converted into an unlocked state from a locked state. The mechanical interlocking device can solve the problems that an existing gas-insulated switchgear is not provided with an interlocking device for a three-position switch grounding position and a rear door, when field maintenance and construction personnel open the rear door to maintain the gas-insulated switchgear, a cable chamber is possibly electrified, and personal safety is likely to be endangered.

Apparatus (1) for grounding a bay (10) of an electrical substation (100) comprising: - a first conductor element (2) electrically connectable to the bay (10); - a second conductor element (3) electrically connectable to ground; - a third conductor element (4) comprising a rod (43), extending between a first and a second end (41, 42), having an electrically conductive core (43a) and a stiffening coating (43b), said rod (43) being switchable between: - a first configuration in which the first and second end (41, 42) are respectively engaged with the first and second element (2, 3), - a second configuration in which the first end (41) is disengaged from the first element (2) and the second end (42) is engaged with the second element (3), - a third configuration in which the first and second end (41, 42) are respectively disengaged from the first and second element (2, 3) - kinematic members (5) configured to move the third element (4) with respect to the first and second element (2, 3) so as to switch the rod (43) between the first and second configuration; - hooking / unhooking members (7) switchable between a hooking configuration, in which they hook the second end (42) of the rod (43) to the second element (3) so as to retain it engaged with the latter when the rod (43) is in the first and second configuration, and an unhooking configuration, in which they unhook the second end (42) of the rod (43) from the second element (3) so as to allow the disengagement thereof from the element (3) and switch the rod from the second configuration to the third configuration.

The present invention relates to a hybrid ground protection device for a modular voltage power converter for converting a primary AC voltage having one or more phases into a secondary AC voltage. The hybrid ground protection device includes input and output contacts connected to the voltage input and voltage output of a single module of the converter. The input and output contacts connected to the same single module are connected to varistors that are energized when the voltage drop across the varistor exceeds a first threshold. A non-conductive switch bar having a bridging contact can be moved from an operating position to a grounding position. In the grounding position, the bridging contact connects the input and output contacts of the single module to each other and to a ground terminal. In the operating position, the input and output contacts are not connected by the bridging contact and are not connected to the ground terminal (FIG. 2).

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.

The invention discloses a grounding switch with a spring mechanism, which comprises a switch part and a rack, and is characterized in that the switch part is arranged at one end of the rack and is in shaft sealing arrangement with the rack; a fixing plate is fixedly arranged on the rack, an upper baffle and a lower baffle are arranged on the two sides of the rack respectively, the fixing plate and the lower baffle are connected through a first spring, the upper baffle and the lower baffle are connected through a second spring, and the driving motor is arranged outside the rack and is in transmission connection with the lower baffle; the motion shaft is in insulated connection with the action end of the switch part; the lower baffle moves towards the fixing plate to further compress the first spring and the second spring, and when moving to the first position, the grounding switch is in an energy storage state, the lower baffle is limited and locked, the upper baffle abuts against the moving shaft, the moving shaft is limited to the second position, and the action end retracts. The main body size is reduced through the external driving motor, the structural complexity of the spring mechanism is reduced, no idle stroke part exists in the energy storage stage, the potential energy of the spring is utilized to the maximum extent, and the operation efficiency of the grounding switch is improved.

Disconnect switch arrangement of an electrical power transmission device with a disconnecting section (2) extending along an axis (5) that passes approximately perpendicularly through a first plane (1) and lies in or parallel to a second plane (14), and with an earthing switch (10) for earthing a contact side (3, 4) of the disconnecting section (2) by means of a movable earthing contact piece and a counter-contact piece (13) that is electrically contacted with the contact side (3, 4), characterized in that the earthing contact piece is movable on a path of movement which runs both obliquely to the first plane (1) and obliquely to the second plane (14).

Gas-insulated electrical switchgear for medium and high-voltage electrical distribution networks that allows configuring different electrical diagrams and that basically consists of a first gas-insulated enclosure (1) and is equipped with at least one electrical connection means (2, 3) and at least one mechanical connection means (4), a second enclosure (11) housed inside the first enclosure (1) and an operating means (5) integrated inside a second enclosure (11) which in turn comprises a gas breaking switch, an actuating element (8) configured to actuate the operating means (5) that performs the functions of breaking, making, disconnecting and grounding, and an operating mechanism (9) to produce actuation of the actuating element (8).

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 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.

A ring main unit load switch mechanism comprises a front plate, a middle plate and a rear plate, the rear plate is provided with a grounding operation assembly and an isolation operation assembly, the grounding operation assembly comprises a grounding operation main shaft, one end of the grounding operation main shaft extends to the middle plate and is connected with a pushing part, the middle plate is provided with an indicating piece linked with the pushing part, and the indicating piece is connected with the isolation operation assembly. And when the grounding operation main shaft is switched from the opening state to the closing state, the grounding operation main shaft rotates to drive the indicating piece to be switched to the closing indicating state. The indicating piece is not directly installed on the grounding main shaft, but is linked with the indicating piece of the middle plate through the pushing part at the end part of the main shaft, so that the action of the indicating piece is matched with the actual rotation stroke of the grounding main shaft. Only when the grounding operation main shaft really rotates in place, the pushing part can drive the indicating piece to be switched to the corresponding station, so that the misjudgment condition that the indicating piece indicates in advance but the grounding shaft is not completely in place in the prior art is avoided.

The present invention relates to an electric rotary drive device, which uses a DC motor as a rotation power source, reaches a working speed and a working torque through a reducer, and a vehicle sends a "running position-connection position" command or a "connection position-running position" command. A control unit receives the command and judges that it is normal through internal logic, and drives a grounding arm to rotate from the running position to the connection position or from the connection position to the running position. When the action is in place, the device automatically stops and triggers a "connection position" feedback signal or a "running position" feedback signal to the vehicle, thereby realizing the opening and closing operation of a high-voltage grounding switch; the high-voltage grounding switch can be driven safely and reliably even when the electric locomotive is not equipped with a wind source system.

Electrical connection device with safety fuse element The invention relates to an electrical connection device (10), comprising a first (12) and a second (14) electrical connector; the first connector comprising an upper tab (24) and a lower tab (26), the upper tab being arranged above the lower tab; the second connector comprising a central blade (34). In a connection configuration, the central blade (34) of the second connector is arranged between the upper (24) and lower (26) tabs of the first connector and in contact with each of said tabs.The device further comprises: - a reservoir (16) having a lower opening, said reservoir and said opening being arranged above the central blade (34) of the second connector; and - a quantity of solid-state fusible material (18), received in the reservoir above the lower opening, the fusible material being electrically conductive. Figure for the abstract: Figure 1.

A gas-insulated switch includes: a breaker that cuts off a current; a plurality of general switches including a switching operation unit that opens and closes with rotation of a driven pulley; a breaker manipulator (20) that causes the breaker to perform a switching operation; a plurality of the general switch manipulators (30) including a driving pulley (32) that is rotationally driven by a motor (31); a wire (60) that transmits rotational force of the driving pulley (32); and a housing (70) that houses the breaker manipulator (20) and the general switch manipulator (30). Regarding the plurality of the general switch manipulators (30), the two general switch manipulators (30), arranged in a horizontal direction and set as a set, are disposed above the breaker manipulator (20) in the housing (70), and the wire (60) is put around the driving pulley (32) from a direction different from a direction in which another general switch manipulator (30) in the same set is disposed, in each of the two general switch manipulators (30) included in the single set.

A circuit breaker - disconnector - earthing switch device for a gas-insulated switchgear, for a ring distribution network, is described, wherein the gas-insulated switchgear comprises a tank with a first wall and a second wall, wherein the device comprises: a circuit breaker unit comprising a plurality of vacuum interrupters and a plurality of fixed line-isolating contacts, wherein, each fixed line-isolating contact is electrically connected to a respective vacuum interrupter; a disconnector unit comprising a shaft rotatable about its longitudinal rotation axis, a plurality of mobile contacts projecting from the rotatable shaft and a plurality of earth contacts; a first plate and a second plate arranged facing each other, wherein the first plate is configured to be fastened to the first wall and the second plate is configured to be fastened to the second wall; and a second tie-bar configured to support the earth contacts.

The invention discloses an electric grounding switch interlock, which relates to the technical field of electric power guarantee equipment, and comprises a power, transmission and rear door interlock assembly, a motor output shaft is connected with a speed reducer, in a transmission gear set beside the speed reducer, a screw rod is connected with a rotating shaft through a first coupling, and after the motor is started, power is transmitted to realize the opening and closing operation of a grounding switch. A position sensor on one side of a grounding switch protection shell is fixed to an installation support, monitors the state of a grounding switch and transmits signals to an external control unit, an outer shell of a rear door interlocking assembly is fixed to the side of a rear door and an equipment body, and a magnetic coil is arranged in the outer shell. Compared with a traditional device, the interlocking device has the advantages that automatic operation can be achieved, time is saved, the operation and maintenance efficiency is improved, the rear door and the grounding switch are intelligently associated, safety protection is enhanced, personnel are prevented from being in danger, and the overall efficiency and safety are improved.