66results about "Circuit-breaking switch contacts" patented technology

The application relates to the technical field of switch equipment, in particular to an arc-extinguishing chamber with a flow guide structure and a circuit breaker. The arc-extinguishing chamber with the flow guide structure comprises a contact seat, a static support and a flow guide cylinder, the contact seat is provided with an axial flow hole, the static support is a tubular structure with an open end, is sleeved on the contact seat through the open end, the flow guide cylinder is arranged in the static support along an axial direction, the flow guide cylinder and the static support surround an annular flow guide channel, a through hole is formed in the outer wall of the static support, a gas baffle is fixedly installed on the outer wall of the static support and corresponds to the through hole, and the gas baffle is provided with a gas discharge hole. The arc-extinguishing chamber with the flow guide structure can prolong the discharge path of the hot airflow and reduce the flow speed, can effectively prevent a large amount of foreign matters such as metal particles and dust carried in the hot airflow from being discharged, avoids threatening the ground or interphase insulation at the tail of the airflow channel, and improves the insulation reliability.

This application provides an arc-blocking device and a circuit breaker, belonging to the field of electrical equipment technology. In this arc-blocking device, one end of an elastic element is connected to the circuit breaker housing, and the other end is connected to an arc-blocking element, which is located on the movement trajectory of the circuit breaker's moving contact. When the moving and stationary contacts of the circuit breaker are in contact, the arc-blocking element is located on the side of the moving contact facing away from the stationary contact. During the separation process of the moving and stationary contacts, the moving contact pushes against the first side of the arc-blocking element, causing the arc-blocking element to drive the elastic element to bend and deform in the first direction until the moving contact slips off from the first side. Then, under the elastic force of the elastic element, the arc-blocking element moves in the second direction to between the moving and stationary contacts, thereby forcibly cutting off the arc generated when the moving and stationary contacts separate. It has good breaking capacity and can effectively improve the arc-extinguishing capability of the circuit breaker. Furthermore, the arc-blocking device provided in this embodiment has a simple structure, is easy to assemble, operates reliably, and has a certain degree of universality.

An operating mechanism for a circuit breaker includes: a first base plate, a second base plate, a first linkage mechanism, and a second linkage mechanism. The first and second linkage mechanisms each include a first link, a second link, and a third link. One end of the first and third links is pivotally connected to the corresponding base plate at a first hinge point and a third hinge point, respectively. One end of the second link is hinged to the free end of the third link, and the other end is hinged to the middle of the first link at a second hinge point. The first link includes a first hole provided on its free end. An output shaft extends through the first hole of the first link of the first and second linkage mechanisms. The first and / or second linkage mechanism further includes a fourth link. One end of the fourth link is pivotally connected to the first hinge point, and the fourth link is hinged at the middle of the second hinge point. The fourth link has a second hole on its free end, and the output shaft extends through the second hole.

The utility model discloses a kind of moulded case circuit breaker conducting systems, including base, multiple contact cavities are formed by multiple arrangement settings baffle in the base, multiple rotating cavities are opened in the base middle part in contact cavity opposite position, movable contact assembly is rotatably connected in the rotating cavity, static contact assembly that is installed in contact cavity is cooperated with movable contact assembly and realizes on-off, connection position is opened in the base surface front end, the static contact assembly includes static contact, first arc-extinguishing chamber and fixed baffle, one end of the static contact is set in contact cavity, the other end of the static contact extends to connection position, first arc-extinguishing chamber is installed below static contact, fixed baffle is arranged in first arc-extinguishing chamber opposite position on the surface of static contact upper side, and the bottom of fixed baffle is contacted with the outer wall of first arc-extinguishing chamber. By setting two arc-extinguishing chamber arrangement and positioning, the breaking capacity, safety reliability and service life of moulded case circuit breaker are significantly improved.

The application discloses a small circuit breaker movable contact connecting structure and a small circuit breaker. The movable contact connecting structure comprises a movable contact and a contact support. A waist-shaped hole is arranged on the surface of the contact support, the waist-shaped hole is used for arranging a first hinged shaft to hinge the contact support to a circuit breaker base, and the contact support can slide along the long axis direction of the waist-shaped hole under the radial limitation of the first hinged shaft; an insertion warehouse for partially inserting the movable contact is arranged on the side wall of the contact support. During the closing process of the small circuit breaker, the contact support is forced to rotate around the first hinged shaft to a preset angle, then the movable contact and the static contact abut against each other, the contact support continues to be forced to make the contact support translate relative to the base, and the first hinged shaft in the waist-shaped hole is relatively translated to the other side along the long axis direction from one side of the waist-shaped hole. The application discards the mode of fixing the movable contact in the traditional circuit breaker, and has the advantages of stable connection and simple structure.

The utility model discloses a circuit breaker, a shell body has a first shell, and a second shell is opposite to first shell setting to form the internal accommodation cavity of circuit breaker together, at least one inner casing body has predetermined accommodation chamber, and it sets up in the inside of shell body and is located between first shell and second shell, operating mechanism and tripping mechanism are installed in the accommodation chamber formed in at least one inner casing body at least partially, and contact system and arc extinguishing mechanism are connected between first shell and second shell and are located in the outside of inner casing body. According to the circuit breaker of the utility model, the electric gas discharge speed is faster, and the product safety performance is better.

A kind of double-contact circuit breaker.The utility model provides a double-contact circuit breaker, mainly solves the problem of high temperature rise of current adoption series double-contact circuit breaker.Its characterized in that: the static contact includes first static contact point (21) and second static contact point (22) in parallel on circuit;The moving contact includes first moving contact (51) and second moving contact (52) in parallel on circuit, first moving contact is oppositely arranged with the first static contact point, second moving contact is oppositely arranged with the second static contact point;Partition (6) is arranged between two the arc-extinguishing chambers, part the partition is arranged in the arc running channel and is divided into two chambers.This utility model provides a double-contact circuit breaker, adopts parallel double-contact structure, and the temperature rise is lower.

The application relates to the technical field of circuit breakers and discloses a grounded circuit breaker which comprises a moving contact, a static contact, a handle, a cover body and an output end, is internally provided with a grounding component and a first connecting piece, one end of the first connecting piece is connected with the moving contact, after the moving contact is separated from the static contact during a tripping process, the moving contact drives the first connecting piece to extrude the grounding component, the grounding component is contacted with the output end to be grounded, and the grounded circuit breaker is characterized in that, during the operation process of the circuit breaker, the moving contact is connected with the output end, then when the moving contact is tripped, the grounding component is controlled to complete grounding by using a grounding power rod and a grounding force transmission rod, the safety when the switch is turned off is guaranteed, the circuit has no current after being turned off, and when the switch is turned on, the grounding function of the circuit breaker is released by first rotating a grounding reset lever and then allowing a grounding reset lever to push the grounding force transmission rod.

The residual current circuit breaker comprises a shell, a residual current module, an L-pole unit and an N-pole unit, the shell is provided with a first chamber and a second chamber, the N-pole unit is installed in the first chamber, and the L-pole unit is installed in the second chamber; the residual current module comprises an electronic component board, a zero sequence transformer and a residual current operating release, the residual current operating release and the electronic component board are respectively installed in the first chamber, and the zero sequence transformer is at least partially installed in the first chamber; the N-pole unit comprises an N-pole moving contact, an N-pole static contact, an N-pole operating mechanism and an N-pole short-circuit protection device, the N-pole operating mechanism is connected with the N-pole moving contact, and the N-pole short-circuit protection device and the residual current operating release are respectively used for driving the N-pole operating mechanism to be unlocked and released. The residual current circuit breaker of the application sets the short-circuit protection device and the operating mechanism in the first chamber where the N-pole unit is located, not only has the short-circuit protection, but also improves the reliability of the closed contact of the N-pole contact.

The utility model relates to circuit breaker technical field discloses a circuit breaker arc extinguishing structure, including movable contact component, static contact component and arc extinguishing chamber, the static contact point of static contact component is located at the bottom of the entrance of arc extinguishing chamber, the movable contact point of movable contact component is located at the entrance of arc extinguishing chamber and can switch between the closing position, the opening position and the tripping position, the first arc -leading piece of extending from tripping position to the opening position is arranged in arc extinguishing chamber, the first arc -leading piece is used for when carrying critical load current, the arc produced when circuit breaker opens is introduced into arc extinguishing chamber and fastly ends burning arc, and also is used for when carrying short -circuit current, the arc produced when circuit breaker trips enters arc extinguishing chamber quickly. The circuit breaker arc extinguishing structure guarantees short -circuit breaking capacity, and also improves the performance of circuit breaker carrying critical load current breaking.

The application discloses an insulation structure of a circuit breaker, which comprises an operating mechanism, a first shaft close to one side of a moving contact, a support fixed by the first shaft, an insulation piece connected with the first shaft, and a second contact surface provided on the side of the moving contact close to the first shaft. When the circuit breaker bears a short-circuit current, the moving contact is repelled under the action of an electric repulsive force, and the first contact surface abuts against the second contact surface. When a short circuit occurs, the moving contact moves rapidly under the action of the electric repulsive force, and at this time, the moving contact abuts against the insulation piece, the insulation piece is located between the first shaft and the moving contact, and an electric isolation effect is formed. In addition, the first contact surface abuts against the second contact surface, a surface contact effect is formed, the stress area is increased, the stress is dispersed, and the moving contact does not deform.

A low-voltage switching apparatus is disclosed which comprises a switching device having one or more switch poles. Each switch pole comprises first and second pole terminals that can be coupled with corresponding line conductors of an electric line; a fixed contact assembly is connected to the first pole terminal and includes first fixed contacts and second fixed contacts electrically insulated from the first fixed contacts; and a movable contact assembly connected to the second pole terminal and including first movable contacts and second movable contacts. The switching apparatus comprises, for each switch pole, a current limiter connected with the second fixed contacts and the first pole terminal of the switch pole. Each current limiter is configured to limit a current flowing along a series circuit including at least the second fixed contacts, the current limiter and the first pole terminal, during an opening maneuver of the switching device.

The utility model relates to a static contact structure of a medium-voltage ring main unit circuit breaker, which comprises a base and a static contact plate which are integrally formed, the base is of a cuboid structure, a screw mounting hole used for connecting a static end of the circuit breaker is arranged on the base, the base is arranged at the lower part of the static contact plate, and a groove for accommodating the static contact plate is arranged on the side wall of the base. A groove is formed in the base, the static contact plate is arranged in the groove, the end faces of the two sides of the static contact plate are two vertically-arranged contact planes, the contact planes are trapezoidal, the side, close to the base, of each contact plane is provided with a contact edge arc-shaped chamfer, and the contact edge arc-shaped chamfers of the two contact planes are matched to form a transition guide part facilitating contact between the moving contact and the contact planes; the static contact structure ensures enough contact area with the moving contact, reduces contact resistance, reduces heating, improves conductivity and breaking capacity, ensures proper contact pressure between the static contact structure and the moving contact, enables the static contact structure and the moving contact to be tightly contacted, prevents poor contact, and is easy to disassemble and replace.

This invention belongs to the field of electrical switch technology and discloses a self-lubricating mechanism for the contacts of a frame circuit breaker. The mechanism includes a frame circuit breaker body, within which a moving contact group is fixedly installed. During rotation, the moving contact group can contact and separate from the stationary contacts, thereby controlling the on / off state of the circuit in the frame circuit breaker. A moving contact support plate is fixedly installed on the moving contact group, and a rotating shaft is fixedly installed within the moving contact group. This invention utilizes a shaft seal lubrication assembly on the outside of the rotating shaft. The rotational energy of the shaft during the opening and closing swing of the moving contact group drives a spiral blade to synchronously push grease, ensuring continuous and uniform penetration of the grease into the hinged joint surface between the rotating shaft and the moving contact support plate. This achieves automatic and long-term lubrication of the shaft hinge, effectively solving the problems of high rotational resistance, mechanism jamming, and accelerated wear caused by long-term dry friction of the rotating shaft in existing technologies. It significantly reduces the frictional loss during the swing of the moving contact group, ensuring smooth and stable opening and closing operation of the moving contact group.

The present invention provides a circuit breaker comprising a housing (10), a movable contact (21), a stationary contact (22), and a gas generation unit (40). The housing (10) has a receiving cavity (11) for receiving the movable contact (21) and the stationary contact (22). The gas generation unit (40) is capable of releasing gas into the receiving cavity (11) to generate a gas flow after it has been tripped. The generated gas flow is used to extinguish an arc that is generated by the movable contact (21) and the stationary contact (22) during an interruption. The circuit breaker extinguishes the arc by means of the gas flow generated by the gas generation unit, which is advantageous for improving the arc-quenching capability of the circuit breaker and, consequently, for improving the short-circuit breaking capacity of the circuit breaker.

The application relates to the field of low-voltage switches, in particular to a molded case circuit breaker. The molded case circuit breaker comprises a shell, a moving contact, a static contact, a rear opening for the moving contact to extend into at the rear side of an arc extinguishing chamber, an insulating partition is assembled in the upper and lower directions at the rear opening for shielding the rear opening of the arc extinguishing chamber; the moving contact passes below the insulating partition, so that the insulating partition is driven to move upwards by the moving contact when the moving contact and the static contact are disconnected, and the insulating partition falls down by gravity when the moving contact and the static contact are closed. An arc is generated when the moving contact and the static contact are disconnected, and the heat generated in the arc extinguishing process of the arc extinguishing chamber increases the air pressure in the arc extinguishing chamber. Since the rear opening part of the arc extinguishing chamber is shielded, the heat to the rear side of the arc extinguishing chamber is reduced, the backward movement of the arc is reduced, and the gas pressure in the arc extinguishing chamber is increased to a certain extent, which is beneficial to the ejection of the arc and improves the arc extinguishing effect.

The application relates to a double-breakpoint linkage arc-extinguishing type direct-current circuit breaker mechanical structure and a control method, and belongs to the technical field of direct-current circuit breakers. The mechanical structure comprises a mechanism frame, a handle, a rocker arm and a double-breakpoint movable contact assembly, the double-breakpoint movable contact assembly comprises a movable contact support which is rotationally connected to the mechanism frame and is connected with the rocker arm through a contact spring, and a side wall of the movable contact support is provided with a guide sliding groove; a movable contact body is rotationally connected to the movable contact support, and a side wall of the movable contact body is provided with a compensation sliding groove; an adjusting assembly comprises a sliding block which is slidably arranged in the guide sliding groove, and a driving column which is fixed to the sliding block and extends into the compensation sliding groove; the compensation sliding groove and the guide sliding groove are arranged in a non-parallel mode, so that, in the opening process, the sliding block is converted into the angular displacement of the movable contact body relative to the movable contact support for compensation through the cooperation of the driving column and the compensation sliding groove. Through the application, the problems of service life reduction and safety hazards caused by contact thinning in the prior art are solved.

The application relates to a miniature circuit breaker which comprises a shell, a handle assembly, a movable contact mechanism and a short-circuit instantaneous tripping system, the handle assembly is rotationally connected in the shell and extends to the outside of the shell at one end, the movable contact mechanism is rotationally connected in the shell through a lock catch hollow shaft, the movable contact mechanism is connected with the handle assembly through a connecting rod, a connecting point of the movable contact mechanism and the connecting rod is a set point, the movable contact mechanism comprises a movable contact body, the short-circuit instantaneous tripping system is arranged in the shell and comprises a static contact, a connecting line between the set point and an end point of the movable contact body is obliquely arranged, a distance between the set point and the axis of the lock catch hollow shaft is a first distance, a distance between the axis of the lock catch hollow shaft and the movable contact body is a second distance, the first distance is smaller than the second distance and greater than a second set distance, the distance between the static contact and the movable contact body is increased, and the rated short-circuit breaking capacity of the miniature circuit breaker is effectively improved.

The application discloses a miniature circuit breaker with remote control function, which comprises a shell (1), an operating mechanism (2), a contact system (3), an electromagnetic system (4) and an arc extinguishing system (5) which are arranged in the shell (1), characterized in that a driving transmission system (6) is further arranged and is arranged in the same plane with the operating mechanism (2), the contact system (3), the electromagnetic system (4) and the arc extinguishing system (5). The miniature circuit breaker integrates an electric operating mechanism, realizes the remote control function without an additional electric operating mechanism, greatly reduces the volume of the miniature circuit breaker, has a compact structure and expands the function of the miniature circuit breaker.

This invention discloses a moving contact portion, a circuit breaker contact system, and a circuit breaker. The circuit breaker includes a contact support and a first moving contact and a second moving contact rotatably connected coaxially to the contact support. Elastic elements are provided between the first moving contact and the contact support, and between the second moving contact and the contact support. The limiting swing angle of the first moving contact is configured to be greater than that of the second moving contact. The elastic force exerted by the elastic element on the second moving contact when the second moving contact is at its limiting swing angle is defined as F1, while the elastic force exerted by the elastic element on the first moving contact when the first moving contact is at its limiting swing angle is defined as F2. F2 is configured to be less than F1. The first moving contact of this invention has a low contact pressure during breaking, making it easy to be quickly repelled. The repulsion speed and repulsion distance are effectively increased, thereby suppressing further increases in short-circuit current and achieving a good current-limiting effect.

The application relates to the technical field of circuit breakers, and discloses a small-sized DC circuit breaker which comprises a circuit breaker body, a static contact is arranged on the circuit breaker body, an operating mechanism is rotationally connected to the circuit breaker body, a dynamic contact is arranged on the operating mechanism, a first magnet and a second magnet are arranged on the circuit breaker body, the first magnet and the second magnet have the same magnetism, a first channel for separating the dynamic contact and the static contact is formed between the first magnet and the second magnet, and the first channel can repel an electric arc. The application can form a strong magnetic field region between the first magnet and the second magnet, a strong electric arc generated when the dynamic contact and the static contact are disconnected can be rapidly driven away from a contact gap, and the electric arc can be directionally stretched and cooled along the first channel, so that the electric arc can be effectively prevented from stagnating in the contact region, gathering energy and continuously burning, the degree of burning of a contact surface is reduced, the extinction efficiency of the electric arc is improved, and the breaking capacity, electrical life and working stability of the circuit breaker body are improved.

The application discloses a circuit breaker, and relates to the technical field of circuit breakers, which comprises a shell and a cover, an induction device, a triggering device and an arc extinguishing device, the shell is provided with an opening on one side, the cover is arranged on the opening to form an installation space, the induction device is installed in the installation space and used for sensing line short circuit, the triggering device is detachably installed on one side of the shell, the triggering device is provided with a contact, the contact extends into the installation space, and the contact is in contact connection with the induction device, and the arc extinguishing device is detachably arranged in the installation space, so that the maintenance and part replacement convenience of the circuit breaker are improved.

The application relates to the field of low-voltage electrical components, and discloses an opening and closing type sealing device for a low-voltage direct-current working condition. An opening and closing plate is located between an upper chamber and a lower chamber. When a driving contact is opened, an arc is generated between a static arc contact and a dynamic arc contact, and both sides of a hinge are closed. A gas-solid or conductive particle mixture generated by arc burning in the upper chamber is isolated in the area, the influence on the dielectric performance in the lower chamber is reduced, the possibility of electric breakdown between the main static contact and the driving contact is effectively reduced, the protection blank of the main contact reclosing caused by the rebound of arc byproducts is filled, and the isolation function is realized only as an accessory, without replacing the core components of the circuit breaker and without modifying the operating mechanism. The production and transformation of the existing low-voltage direct-current circuit breaker are adapted, the byproducts are blocked from entering the main contact area through linkage physical isolation, and the protection of the dielectric performance of the main contact is more direct and efficient than the indirect way of conventional arc extinguishing and electric field optimization.

The application discloses a leakage circuit breaker and relates to the field of circuit breakers, which comprises a shell and an operating mechanism located at one side of the shell L pole, wherein the operating mechanism comprises a contact support, a wire clamp is arranged on one side of the shell, a movable contact connected with the operating mechanism in linkage, a test button movably arranged and a first line for contacting the test button are arranged on one side of the shell N pole, a rotating block is rotatably arranged on one side of the movable contact, the movable contact drives the rotating block to rotate when closing, and the test button is pressed to realize circuit connection of the first line, a circuit board and a second line connected with the circuit board are further arranged on one side of the shell L pole, a sliding rod is slidably arranged on the shell and contacts the contact support, and the contact support drives the circuit connection of the second line through the sliding rod when the contact support is in action. The application has the advantages of good safety and reliable work.

This application provides a copper-steel composite element for miniature circuit breakers, an electrical contact assembly, and a miniature circuit breaker. The copper-steel composite element includes: a magnetic conductor, one end of which has at least one through groove extending through the thickness direction of the magnetic conductor; and an arc-starting angle, one end of which has a fitting portion matching the shape of the through groove, the fitting portion being riveted and fitted into the through groove. This application connects the end of the arc-starting angle to the through groove of the magnetic conductor by riveting and fitting together, forming a laterally composite copper-steel composite element. This allows for the connection between the arc-starting angle and the magnetic conductor without relying on additional parts, enabling rapid arc extinguishing without reducing the conductivity of the arc-starting electrical contact assembly. This makes the electrical contacts of the miniature circuit breaker more resistant to arc erosion, thus extending the product's service life.

The utility model discloses a circuit breaker relates to electrical protection device technical field, wherein, the circuit breaker static contact forms the bending extension section, and the bending extension section has the overhanging height in the vertical direction, and the static contact point is arranged on the bending extension section, and the electric repulsion between static contact point and dynamic contact point is strengthened, and the dynamic static contact point is accelerated and breaks, and the arc time is shortened to reduce the ablation and energy loss of arc to the contact, the gas cover forms the arc channel, and the gas cover and the bending extension section cooperate and form the sealed chamber to compress the space of arc chamber, and the application of arc extinguishing grid group can further limit short -circuit current and reduce breaking energy, and utilize the gas pressure -maintaining effect and extinguish arc quickly and cool.

This utility model relates to the field of contact assemblies for frame circuit breakers, and discloses a flexible connection protection structure for frame circuit breakers, including a moving contact assembly and a stationary contact assembly. The two are used together to perform their functions. When the moving contact assembly opens, the arc-blocking plate always maintains an appropriate distance from the arc-blocking cover of the stationary contact, so that the impact of the electric arc on the flexible connection structure is minimized, thereby ensuring the normal conduct of subsequent circuit breaker tests. During the opening process, the arc-blocking plate and the arc-blocking cover of the stationary contact also continue to correspond and are not completely separated. The continuous correspondence and arc blocking time is sufficient to ensure that the flexible connection structure is not burned. The rib plate array is set inside the arc-blocking plate, so that the arc-blocking plate can remain stable and not collapse even under high air pressure.

The utility model relates to the technical field of switch disengaging, especially to a lock disengaging device of automatic transfer switch, which mainly aims at the problem that the common lock disengaging device of automatic transfer switch is damaged by the impact force generated in the process of reset touch due to the hard contact between the two contact pieces, and the subsequent power-on is affected, and proposes the following technical scheme: a shell is provided with a connecting rod and a linkage in the shell, a knob is arranged at the top gap of the shell, a first rotating hole and a second rotating hole are arranged on the linkage, an electromagnet is hinged at the first rotating hole, a vertical plate is installed on the inner wall of the shell, and a touch assembly is installed on the side wall of the vertical plate. The utility model realizes the buffering when the power-on structure touches, reduces the damage caused by the impact force in the touch process, prevents the subsequent poor contact, and affects the power-on.