262results about "Earthing switches" patented technology

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 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 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.

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 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.

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 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.

A switch includes: a circuit breaker; a disconnector; a grounding switch; and a manipulator that drives the disconnector and the grounding switch. The manipulator includes: a motor; a plurality of drive pulleys (33) installed on an output shaft of the motor; and a controller that controls rotation of the motor. Each of the disconnector and the grounding switch includes a switching manipulator that performs a switching action according to rotation of a driven pulley. A wire (4) for transmitting torque of the motor is stretched around each of the drive pulleys (33) and corresponding one of the driven pulleys. Each of the plurality of drive pulleys (33) includes: a mover (332) having a catch (334) that engages with the output shaft (32); and a chuck (331) having a mover (332) and a driver, the catch (334) being engaged with the output shaft (32) in the engaged state, and being out of contact with the output shaft (32) in the disengaged state. The controller exclusively brings one of the plurality of drive pulleys (33) into the engaged state.

An electrical assembly comprises a grounding mechanism (54) and an electrical device (52), the grounding mechanism (54) including a support longitudinal member (56) and a switch contact member (58), the switch contact member (58) arranged in or on the support longitudinal member (56), the switch contact member (58) configured to be connected in use to ground, the electrical device (52) including an electrical terminal, wherein the support longitudinal member (56) is configured to be slidable between: a first position in which the switch contact member (58) is separated from the electrical terminal so that the switch contact member (58) is electrically disconnected from the electrical device (52); and a second position in which the switch contact member (58) is in contact with the electrical terminal so that the switch contact member (58) is electrically connected to the electrical device (52).

The present invention relates to the technical field of power equipment, and specifically discloses an offshore wind power pot-type switchgear, which includes a tank body, a circuit breaker, a three-position switch, and a combined switch. Among them, the tank body includes an integrated main tank body and at least two side tank bodies. The side tank bodies are connected to the main tank body and extend along the radial direction of the main tank body. The inner cavity of the main tank body is communicated with the inner cavity of the side tank bodies; the circuit breaker is arranged in the main tank body, and isolation static contacts corresponding to the side tank bodies one by one are provided on the circuit breaker; the three-position switch is arranged in one of the side tank bodies; a combined switch is arranged in each of the remaining side tank bodies, and the combined switch includes a two-position switch and a quick earthing switch. This offshore wind power pot-type switchgear has a compact structure, can meet the use requirements of a smaller internal space in the fan tower, so that it is not necessary to increase the volume of the offshore wind turbine equipment, and reduces the operation cost and operation risk of the offshore platform.

Load break switch for controlled interruption of an electrical current, comprising: a switch blade for switching the electrical current; a blade support for supporting and operating the switch blade; a vacuum interrupter for controlled current interruption; and an actuator cam rotatable about a cam axis for operating the vacuum interrupter; wherein the switch blade is electricallyconductive and rotatable at a first blade end about a blade axis and wherein a second blade end is rotationally displaceable, in sequence, to electrically: connect the first blade end to a primary blade contact, connect the first blade end to a secondary blade contact, and disconnect the first blade end; wherein the vacuum interrupter is connected between the primary and secondary blade contacts to provide a shunt circuit for controlled current interruption; wherein the blade support is arranged, at the second blade end, to cause the rotation of the actuator cam to open the vacuum interrupter.

The application discloses a switch room interlocking mechanism and a ground knife interlocking mechanism and belongs to the field of power distribution equipment. The switch room interlocking mechanism comprises a contactor cabinet and a first interlocking mechanism arranged in the shell. The first interlocking mechanism comprises a ground knife operation shaft and a linkage shaft in mesh transmission with the end bevel gear of the ground knife operation shaft. The linkage shaft is fixed with a linkage plate one in a triangular structure. The linkage plate one serves as a transmission center and drives the second and third interlocking mechanisms through a connecting rod assembly to convert the state of the ground switch into mechanical locking of front and rear doors. The application further comprises a locking assembly two. The locking assembly two directly drives a locking rod to deflect and rise to block a handcart by using the movement of a ground knife operation hole shielding plate. The switch room interlocking mechanism and the ground knife interlocking mechanism are divided by a bevel gear rigid reversing and a triangular linkage plate. The forced synchronization of the ground switch and the locking of front and rear cabinet doors is realized. The active linkage of the shielding plate and the locking rod forms a safe logic of operation and locking. The safety of the equipment is improved.

The present invention relates to a three-position disconnector switch, comprising: an earthing contact (1), a power out contact (2), a power in contact (3), a piston (4), and a threaded rod (5). A length of the piston is such that in a first switch position an outer surface of a wall of the piston makes an electrical contact between the power out contact and the power in contact. The length of the piston is such that in a second switch position the outer surface of the wall of the piston does not make an electrical contact with either the earthing contact or the power in contact. The length of the piston is such that in a third switch position the outer surface of wall of the piston makes an electrical contact between the earthing contact and the power out contact. The piston comprises an inner threaded section (7) configured to engage with the threaded rod, wherein a length of the inner threaded section is less than the length of the piston. Rotation of the threaded rod is configured to engage with the inner threaded section to move the switch between the different switch positions.

Embodiments herein provide a mechanical fuse device (50) for a drive shaft (82) of a switchgear (200). The fuse device (50) includes a first connection portion (42) and a second connection portion (44), and a neck portion (46) connecting the first connection portion (42) and the second connection portion (44). The drive shaft (82) includes a first member (82a) and a second member (82b). The first connection portion (42) is configured to be removably connected to the first component (82a) and the second connection portion (44) is configured to be removably connected to the second component (82b), thereby connecting the first component (82a) and the second component (82b) of the drive shaft (82). The neck portion (46) is a weak link configured to break and thereby disconnect the first component (82a) and the second component (82b) of the driveshaft (82) when subjected to a torque exceeding a predetermined torque value.

To provide an operation mechanism for activating a disconnector or an earthing switch.SOLUTION: A disconnector or an earthing switch for connecting three conductors of different phases to respective switching tubes comprises: a rotatable drive shaft configured for operating the disconnector or the earthing switch; the three respective switching tubes, which are arranged and configured to be axially movable together between a connected position configured for connecting the three conductors and a disconnected position configured for not connecting the three conductors; a partially toothed worm wheel configured for translating a rotation of a worm into the axial movement of the three switching tubes between the connected position and the disconnected position, where the partially toothed worm wheel is disengaged from the worm in the connected position and the disconnected position; and a re-engagement device configured for engaging the partially toothed worm wheel again with the worm in the connected position and the disconnected position.SELECTED DRAWING: Figure 1

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