CN2476875Y - Single-pole contact module with release for circuit breaker - Google Patents

Abstract

The utility model relates to a lower voltage plastic crust type breaker, which comprises a monopole contacting module for a breaker with a disengaging device. The contacting module has two sealed crusts 3 and 4, two static contacts 6 and 7 which are connected with external connecting wires, a double-break movable contact 5 which can have an up-or-down movement corresponding corresponding to the static contacts), a U-shaped metallic element 8 and a moveable metallic flat plate 9 which is corresponding to the U-shaped element. The monopole contacting module is easy for processing, assembling and managing. The module which can open and break quickly has an overcurrent protecting device. The module can match with the electronic disengaging device.

Description

The circuit breaker one pole contact modules that has trip gear

The utility model relates to a kind of low pressure moulded case circuit breaker, relates in particular to circuit breaker one pole contact modules.

Existing heat-electromagnetic breaker is that one group of inseparable each other rotary moving contact is installed in a plastic casing side by side mostly; contacting at the rear portion of moving contact one group of electromagnetism arranged side by side and inseparable and/or thermal overload release are used for supply line is carried out short circuit and overload protection.Along with the development of technology, moulded case circuit breaker is to digitlization, modularization and modularization development.The digital electronic release that has microprocessor control has superiority in accuracy and reliability, but must solve electronic trip unit and circuit breaker structurally with performance on compatibility.Electronic trip unit has comprised several parts such as signal sampling, digital-to-analogue conversion, computing comparison, power supply, execution, and when meeting with overcurrent, electronic trip unit must be through detection-computing-energy storage-dropout process, the contact loop that just can open circuit breaker.Generally, electronic trip unit can satisfy the opening speed requirement in the modern circuit, but when meeting with especially big short circuit current suddenly, also must shorten the opening time of breaker of plastic casing, therefore can be equipped with the quick electromagnetic trip gear.But, being equipped with electronic trip unit and electromagnetic tripping apparatus simultaneously the volume of breaker of plastic casing will be increased, cost improves, and has brought inconvenience to the user.On the other hand, multi-functional, standardized contact modules will replace traditional circuit breaker product that is assembled by part one by one, and the assembly that thisly have relatively independent function, has modularization overall dimension is to manufactory or distributors or the user has brought convenience.The all moving contacts of existing breaker of plastic casing all are fixed on the very thick rotary main shaft, along with the rotation of main shaft, produce the break-make effect between the dynamic/static contact.Will be with the contact assembly modularization of circuit breaker, existing solution is that rotary main shaft is cut into the segment cylinder by number of poles, does not drive its rotation with two axles by this cylinder center then, thereby drives moving contact, makes itself and fixed contact connecting and disconnecting.But the shortcoming that this scheme exists is that the rotary type contact system is because the direction of its operating mechanism motive force can not remain consistent with the direction of motion of driving shaft, suffered power and its direction of motion shape be in an angle when rotating for moving contact, between moving component, produced frictional force, circuit breaker its responsiveness when switching on and off is descended to some extent, influenced the performance of product.

The purpose of this utility model is to provide a kind of circuit breaker that has trip gear one pole contact modules.The moving contact of dress can move up and down in this one pole contact modules, and overcurrent protective device is arranged, processing, easy to assembly.It is very fast that the circuit breaker that a plurality of one pole contact modules are formed cut-offs speed, overcurrent protective device arranged, and can match with electronic trip unit.

The utility model is achieved in that

The circuit breaker that has trip gear comprises the closure casing of module with the one pole contact modules, the fixed contact of two external wires, the double break point moving contact that move up and down corresponding with fixed contact, U-shaped metalwork and the removable metal plate corresponding with the U-shaped metalwork, the U-shaped metalwork has rectangular circular port at U-shaped two middle side parts, and place closure casing outside central authorities, the closure casing stage casing is two-layer up and down, the built-in moving contact in upper strata, lower floor's built-in metal flat board, the spring that metal plate is depressed into closure casing lower floor bottom is housed on the metal plate, closure casing two middle side parts have the rectangular arcuate socket that the circuit breaker operation mechanism connecting rod can pass, and the moving contact both sides have the circular arc through hole that connecting rod can pass.

The above-mentioned circuit breaker of trip gear that has is with in the one pole contact modules, have two circular holes on the described metal plate, have circular recess on the circular hole, two guide posts that connect closure casing lower floor top and bottom are housed in the closure casing lower floor, spring is sleeved on the guide post with the metal plate that has circular hole, spring one end props up the circular recess on the metal plate, and the other end props up closure casing lower floor top.

The above-mentioned circuit breaker of trip gear that has is with in the one pole contact modules, described moving contact comprises contact supporting, constitutes movable contact bridge, two extension spring and the pin that breakpoint contacts with fixed contact, the contact supporting end face is a Y shape, the built-in movable contact bridge in Y shape upper end, have four circular holes on the contact supporting body, circular hole is built-in with fixedly two two extension springs of movable contact bridge, two through holes that the Y shape lower end that two pins pass the contact supporting body has are fixed on two two extension springs on the contact supporting, and contact supporting body middle part level is to having the circular arc through hole.

Operation principle of the present utility model is that the one pole contact modules adopts double break point moving contact that can move up and down and the calutron of being made up of U-shaped metalwork and metal plate, movable contact bridge in the moving contact places on contact supporting and the spring, and has formed by spring between movable contact bridge and contact supporting and flexibly connect.The one pole contact modules has overcome most of frictional force that moving contact runs in motion process, thereby accelerates the speed of cut-offfing.In module closure central authorities; a calutron of being made up of U-shaped metalwork and metal plate is housed, and after electric current that movable contact bridge in the one pole contact modules passes through reached certain value, metal plate was picked up by the U-shaped metalwork; the overcurrent protection effect is played in the action of drive trip gear.Have in the central authorities of one pole contact modules and to be used for the through hole that the circuit breaker operation mechanism connecting rod passes, be convenient to single contact modules combination back and controlled by circuit breaker operation mechanism.The one pole contact modules has processing, easy to assembly, and management is easy to characteristics, and it is fast that module is cut-off speed, and overcurrent protective device is arranged.Match with electronic trip unit, overall dimension is compared substantially with traditional moulded case circuit breaker and is remained unchanged.

The circuit breaker that Fig. 1 has a trip gear for the utility model is with one pole contact modules structural representation, and Fig. 2 be the moving contact structure schematic diagram, and Fig. 3 is the breaker structure schematic diagram that has trip gear of three one pole contact modules compositions.

Provide embodiment of the present utility model below in conjunction with accompanying drawing.

Referring to Fig. 1, the circuit breaker that has a trip gear comprises the fixed contact 6,7 of 3,4, two external wires of module closure casing of being made up of two left-right symmetric, the double break point moving contact 5 that move up and down corresponding with fixed contact 6,7, U-shaped metalwork 8 (being yoke) and the removable metal plate 9 (be armature) corresponding with U-shaped metalwork 8 with the one pole contact modules.U-shaped metalwork 8 has rectangular circular port at U-shaped two middle side parts, be used for module 2 and form that the connecting rod 17 of operating mechanism 16 can pass and move behind the circuit breakers, U-shaped metalwork 8 places closure casing 3,4 outside central authorities, closure casing 3,4 stage casings are two-layer up and down, the built-in moving contact 5 in upper strata, lower floor's built-in metal flat board 9, have two circular holes on the metal plate 9, have circular recess on the circular hole, closure casing 3, be equipped with two in 4 lower floors and connect closure casing 3, the guide post 10 of 4 lower floor tops and bottom, spring 11 is sleeved on the guide post 10 with the metal plate 9 that has circular hole, spring 11 1 ends prop up the circular recess on the metal plate 9, the other end props up closure casing 3,4 lower floor tops, metal plate 9 is depressed into closure casing 3,4 lower floors bottom, make metal plate 9 be attracted and to rise, and can only move up and down, and can not deviate from the position of its regulation by U-shaped metalwork 8.Regulate the rigidity of two springs 11, just can regulate the set point of the calutron action of forming by U-shaped metalwork 8 and metal plate 9.The rectangular arcuate socket 15 that the connecting rod 17 that 3,4 liang of middle side parts of closure casing have circuit breaker operation mechanism 16 can pass is convenient to connecting rod 17 uncrossed motion in arcuate socket 15.Moving contact 5 both sides have the circular arc through hole 19 that connecting rod 17 can pass, and drive moving contacts 5 in order to the connecting rod 17 of circuit breaker operation mechanism 16 and move up and down.

Referring to Fig. 2, moving contact 5 in the one pole contact modules comprises contact supporting 14, with fixed contact 6,7 constitute the movable contact bridge 12 of breakpoint contact, two extension springs 13 and pin 18, contact supporting 14 end faces are Y shape, the built-in movable contact bridge 12 in Y shape upper end, promptly have groove in contact supporting 14 bodies upper end, place movable contact bridge 12 in the groove, have four circular holes on contact supporting 14 bodies, circular hole is built-in with across two on movable contact bridge 12 two extension springs 13, two through holes that the Y shape lower end that two pins 18 pass contact supporting 14 bodies has are fixed on two two extension springs 13 on the contact supporting 14, make contact and fixed contact 6 on the movable contact bridge 12, during 7 contacts suitable pressure is arranged, and movable contact bridge 12 can only move up and down.Because circuit breaker will have electric arc and high temperature to produce when the big short circuit current of disjunction, two extension springs 13 are installed in four circular holes on contact supporting 14 bodies, and two extension springs 13 can be blocked and protect when work.Moving contact 5 is installed in the closure casing 3,4 of one pole contact modules, and contact supporting 14 moves up and down under the connecting rod 17 of operating mechanism 16 drives in the slideway of closure casing 3,4.Have only very little slit between contact supporting 14 and the closure casing 3,4, the electric arc that dynamic and static contact is produced when disconnecting can only direction in accordance with regulations outwards overflow, and can not cause short circuit in circuit breaker inside.For the arcuate movement that guarantees drive link 17 is converted into moving up and down of moving contact 5, horizontal direction has a circular arc through hole 19 at contact supporting 14 bodies middle part, and connecting rod 17 passes in the through hole 19 can do a spot of transverse movement, and moving contact 5 can only move up and down.

Referring to Fig. 3, by the circuit breaker that three one pole contact modules 2 are formed, contact modules 2 places in the case for circuit breaker 1, and trip gear is housed on the circuit breaker, and trip gear comprises operating mechanism 16, connecting rod 17 and side transmission mechanism 20,21.The connecting rod 17 of control operation mechanism 16 moves up and down the moving contact 5 in the contact modules 2, with fixed contact 6,7 connecting and disconnecting, thereby is switched on or switched off circuit.When the electric current by moving contact 5 in the contact modules 2 surpasses certain value, metal plate 9 overcomes spring 11 pressure and is picked up, and drives side transmission mechanism 20,21, and then drives operating mechanism 16, trip gear is triped, cause the dynamic/static contact in the contact modules all in the circuit breaker to disconnect.Because metal plate 9 is placed in the one pole contact modules 2; the function that overcurrent protection is arranged; therefore to join the size of trip gear little for the circuit breaker original circuit breaker of volume ratio of mixing trip gear, and this contact modules is particularly useful for being equipped with the circuit breaker of electronic trip unit.

Certainly, can be combined into multipole circuit breaker by the utility model according to user's needs.

Claims (3)

1. circuit breaker one pole contact modules that has trip gear, the closure casing (3 that comprises module, 4), the fixed contact (6 of two external wires, 7), it is characterized in that this one pole contact modules also comprises and fixed contact (6,7) the Dui Ying double break point moving contact (5) that moves up and down, U-shaped metalwork (8) and the removable metal plate (9) corresponding with U-shaped metalwork (8), U-shaped metalwork (8) has rectangular circular port at U-shaped two middle side parts, and place closure casing (3,4) outside central authorities, closure casing (3,4) stage casing is two-layer up and down, the built-in moving contact in upper strata (5), lower floor's built-in metal flat board (9), be equipped with on the metal plate (9) metal plate (9) is depressed into closure casing (3,4) spring (11) of lower floor bottom, closure casing (3,4) two middle side parts have the rectangular arcuate socket (15) that circuit breaker operation mechanism connecting rod (17) can pass, and moving contact (5) both sides have the circular arc through hole (19) that connecting rod (17) can pass.

2. the circuit breaker that has trip gear one pole contact modules according to claim 1, it is characterized in that having on the metal plate (9) two circular holes, have circular recess on the circular hole, two guide posts (10) that connect closure casing (3,4) lower floor top and bottom are housed in closure casing (3, the 4) lower floor, spring (11) and the metal plate (9) that has a circular hole are sleeved on the guide post (10), spring (11) one ends prop up the circular recess on the metal plate (9), and the other end props up closure casing (3,4) lower floor top.

3. the circuit breaker that has trip gear one pole contact modules according to claim 1, it is characterized in that moving contact (5) comprises contact supporting (14), with fixed contact (6,7) constitute the movable contact bridge (12) that breakpoint contacts, two extension springs (13) and pin (18), contact supporting (14) end face is a Y shape, Y shape upper end built-in movable contact bridge (12), have four circular holes on contact supporting (14) body, circular hole is built-in with fixedly two two extension springs (13) of movable contact bridge (12), two pins (18) pass two through holes that the Y shape lower end of contact supporting (14) body has two two extension springs (13) are fixed on the contact supporting (14), and contact supporting (14) body middle part level is to having circular arc through hole (19).

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