CN114388316B - Circuit breaker contact system - Google Patents
Circuit breaker contact system Download PDFInfo
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- CN114388316B CN114388316B CN202111602775.2A CN202111602775A CN114388316B CN 114388316 B CN114388316 B CN 114388316B CN 202111602775 A CN202111602775 A CN 202111602775A CN 114388316 B CN114388316 B CN 114388316B
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- trip
- circuit breaker
- shaft
- tripping
- magnetic
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- 230000007246 mechanism Effects 0.000 claims abstract description 63
- 230000005540 biological transmission Effects 0.000 claims abstract description 59
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 43
- 238000004146 energy storage Methods 0.000 claims abstract description 28
- 230000001052 transient effect Effects 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 49
- 230000003068 static effect Effects 0.000 claims description 32
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 238000001514 detection method Methods 0.000 claims description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 17
- 229910052802 copper Inorganic materials 0.000 claims description 17
- 239000010949 copper Substances 0.000 claims description 17
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000014759 maintenance of location Effects 0.000 claims 2
- 230000009471 action Effects 0.000 description 25
- 238000010586 diagram Methods 0.000 description 24
- 238000003825 pressing Methods 0.000 description 19
- 210000000078 claw Anatomy 0.000 description 9
- 230000006870 function Effects 0.000 description 8
- 238000012544 monitoring process Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 230000003993 interaction Effects 0.000 description 5
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- 238000009434 installation Methods 0.000 description 4
- 230000001960 triggered effect Effects 0.000 description 4
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- 238000000926 separation method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- WSNMPAVSZJSIMT-UHFFFAOYSA-N COc1c(C)c2COC(=O)c2c(O)c1CC(O)C1(C)CCC(=O)O1 Chemical compound COc1c(C)c2COC(=O)c2c(O)c1CC(O)C1(C)CCC(=O)O1 WSNMPAVSZJSIMT-UHFFFAOYSA-N 0.000 description 1
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- 230000007306 turnover Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/04—Contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
- H01H71/2436—Electromagnetic mechanisms with a holding and a releasing magnet, the holding force being limited due to saturation of the holding magnet
Abstract
The invention discloses a circuit breaker contact system, wherein a bidirectional magnetic holding device is provided with a transmission shaft which can be manually or electrically operated to perform transverse movement, a transient protection unit is provided with a tripping shaft which can be manually or electrically operated to perform transverse movement and vertical movement, the tripping shaft is positioned between the transmission shaft and a movable contact support piece, and the transmission shaft is provided with an energy storage mechanism and a holding mechanism; when the switch is closed, the energy storage mechanism releases energy, the transmission shaft, the tripping shaft and the moving contact support piece are driven to move towards the switch-on direction, and when the switch is closed, the holding mechanism provides switch-on holding force; when the brake is separated, the movable contact support piece, the tripping shaft and the transmission shaft are reset towards the brake separating direction, and the retaining mechanism provides brake separating retaining force when the brake is separated, and stores energy for the energy storage mechanism; when overload or short circuit occurs, the tripping shaft is driven to vertically move, so that the tripping shaft is separated from the transmission shaft and the moving contact support piece to perform tripping and opening protection. The invention can improve the switching-on and switching-off speed and the reliability.
Description
Technical Field
The invention relates to the technical field of electrical equipment, in particular to a circuit breaker product, and specifically relates to a circuit breaker contact system.
Background
The circuit breaker is a common device in electrical equipment, has a certain protection function besides a control function, and is widely applied to the control and protection of various incoming and outgoing lines of a low-voltage distribution system, the power supply control of various mechanical equipment and power utilization terminals. Typical circuit breakers are classified by installation into plug-in, fixed and drawer type, with plug-in circuit breakers being most widely used. The traditional plug-in circuit breaker with an automatic switching-on and switching-off function adopts a motor and gear reduction structure, and electric operation is realized through control of an electronic control board, wherein a four-bar mechanism is adopted between a switching-on and switching-off operation mechanism and a contact system, and the circuit breaker belongs to the technical scheme of the traditional mechanical circuit breaker and motor reduction mechanism, and has the advantages of complex integral structure, high cost and insufficient response speed; in addition, the circuit breaker sometimes cannot be effectively maintained after switching-on and switching-off is completed, and meanwhile, the risk that the circuit breaker cannot be tripped in time during overload or short circuit exists, so that the reliability of a product is not high enough.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a circuit breaker contact system which can improve the response speed and the reliability of products.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: the circuit breaker contact system comprises a moving contact system, a fixed contact and a shunt detection system, wherein a bidirectional magnetic retaining device and a transient protection unit are configured, the bidirectional magnetic retaining device is provided with a transmission shaft which can be manually or electrically operated to perform transverse movement, the transient protection unit is provided with a tripping shaft which can be manually or electrically operated to perform transverse movement and vertical movement, the tripping shaft is positioned between the transmission shaft and a moving contact support piece, and the transmission shaft is configured with an energy storage mechanism and a retaining mechanism; when the switch is closed, the energy storage mechanism releases energy, the transmission shaft, the tripping shaft and the moving contact support piece are driven to move towards the switch-on direction, and when the switch is closed, the holding mechanism provides switch-on holding force; when the brake is separated, the movable contact support piece, the tripping shaft and the transmission shaft are reset towards the brake separating direction, and the retaining mechanism provides brake separating retaining force when the brake is separated, and stores energy for the energy storage mechanism; when overload or short circuit occurs, the tripping shaft is driven to vertically move, so that the tripping shaft is separated from the transmission shaft and the moving contact support piece to perform tripping and opening protection.
Further, the bidirectional magnetic holding device comprises a magnetic yoke, magnetic steel, a movable iron core, a left side static iron core and a right side static iron core, wherein the magnetic steel is fixedly arranged in the magnetic yoke, the movable iron core is arranged in a transmission shaft and is accommodated in the magnetic yoke, the transmission shaft can be transversely movably arranged on the magnetic yoke, the left side static iron core and the right side static iron core are respectively fixed on two sides of the magnetic yoke, the magnetic steel and the right side static iron core form a closing magnetic circuit so as to provide closing magnetic holding force when closing, and the magnetic yoke, the magnetic steel and the left side static iron core form a closing magnetic circuit so as to provide opening magnetic holding force when opening; the energy storage mechanism can be applied to the movable iron core to accelerate closing.
Further, the energy storage mechanism comprises an energy storage spring, and the energy storage spring is sleeved on the transmission shaft and is positioned between the movable iron core and the left static iron core.
Further, the movable iron core is provided with an energy storage spring cavity, and the energy storage spring can be arranged in the energy storage spring cavity for positioning.
Further, the instantaneous protection unit is provided with a U-shaped magnetic yoke, an armature, a tripping sliding plate and a tripping sliding plate reset spring, wherein the armature is arranged in the U-shaped magnetic yoke, a tripping copper bar is arranged between the armature and the U-shaped magnetic yoke in a penetrating way, the tripping sliding plate is connected with the armature, the tripping sliding plate reset spring is respectively applied to the tripping sliding plate and the U-shaped magnetic yoke, and a tripping shaft can move along with the tripping sliding plate.
Further, the trip slide is provided with a trip slide middle hole, and the trip shaft is arranged in the trip slide middle hole.
Further, the bottom of the tripping sliding plate is provided with a buckling groove, and the armature is arranged in the buckling groove to be buckled with the tripping sliding plate.
Further, a spring positioning hole is formed in the tripping sliding plate, and a sliding plate reset spring can be installed in the spring positioning hole for positioning.
Further, a soft connecting wire is arranged in front of the tripping copper bar and the moving contact support piece, and two ends of the soft connecting wire are respectively connected with the tripping copper bar and the moving contact support piece.
Further, the moving contact support is provided with a support ejector rod, the tripping shaft is contacted with or separated from the support ejector rod to realize manual or electric switching-on, switching-off or switching-off, and the moving contact support is provided with a moving contact spring and a reset counter-force spring to provide switching-on pressure during switching-on and switching-off restoring force during switching-off.
Compared with the prior art, the invention provides a direct-acting breaker, wherein a contact system of the direct-acting breaker is provided with a bidirectional magnetic holding device and a snap protection unit, wherein: the bidirectional magnetic holding device directly operates to complete switching-on and switching-off of the circuit breaker, and the stable operation mechanism and the moving and static contact system are reliably held by the bidirectional magnetic holding device after switching-on or switching-off, and in addition, the bidirectional magnetic holding device is also provided with an energy storage spring to accelerate switching-on speed; overload or short-circuit trip protection is realized through the instantaneous protection unit, and the reliability of products can be improved.
Drawings
FIG. 1 is a schematic cross-sectional view of a circuit breaker of the present invention;
FIG. 2 is a schematic diagram of a circuit breaker control circuit of the present invention;
FIG. 3 is a waveform diagram of the control signals and status of the circuit breaker of the present invention;
FIG. 4 is a schematic diagram of the force applied to the drive shaft of the circuit breaker of the present invention;
fig. 5 is a schematic sectional view of a circuit breaker of the present invention in a disconnected state;
fig. 6 is a schematic cross-sectional view of a circuit breaker of the present invention in a closed state;
fig. 7 is a schematic diagram of a circuit breaker operating mechanism of the present invention;
fig. 8 is a schematic diagram of a circuit breaker operating mechanism according to the present invention;
fig. 9 is a schematic diagram illustrating the assembly of a trip slider and a trip shaft in the circuit breaker operating mechanism of the present invention;
FIG. 10 is a schematic diagram of a circuit breaker bi-directional magnetic latching device of the present invention;
FIG. 11 is a front view of the circuit breaker bi-directional magnetic latching device of the present invention;
FIG. 12 is a side view of the circuit breaker bi-directional magnetic latching apparatus of the present invention;
FIG. 13 is a schematic diagram of a circuit breaker bi-directional magnetic latching mechanism according to the present invention;
FIG. 14 is a cross-sectional view W-W of FIG. 13;
FIG. 15 is a schematic diagram of a two-way magnetic latching device for a circuit breaker according to the present invention;
FIG. 16 is a cross-sectional view V-V of FIG. 15;
FIG. 17 is a schematic view of a magnetic holder of the two-way magnetic latching device of the circuit breaker of the present invention;
FIG. 18 is a schematic view showing a part of the structure of the instantaneous protection unit, the moving contact system, the fixed contact and the shunt detection system of the breaker;
fig. 19 is a schematic sectional view of a first stage of tripping the circuit breaker of the present invention;
fig. 20 is a schematic sectional view of a second stage of circuit breaker trip of the present invention;
fig. 21 is a schematic cross-sectional view of a third stage of circuit breaker trip of the present invention;
fig. 22 is a schematic view showing an initial state of snap protection of the circuit breaker according to the present invention;
fig. 23 is a schematic view showing a state of a first stage of snap protection of the circuit breaker according to the present invention;
fig. 24 is a schematic view showing a second stage of transient protection of the circuit breaker of the present invention;
fig. 25 is a schematic view showing a third stage of transient protection of the circuit breaker according to the present invention;
fig. 26 is a schematic diagram showing an operation end state of the instantaneous protection unit of the circuit breaker according to the present invention;
fig. 27 is an assembly view of the circuit breaker contact position detection and status indication of the present invention;
fig. 28 is a schematic view illustrating an initial state of an emergency trip structure of the circuit breaker according to the present invention;
fig. 29 is a schematic view showing a trip button pressed state of the circuit breaker of the present invention;
fig. 30 is a schematic view showing a state in which a locking and unlocking member of the circuit breaker of the present invention is pressed;
fig. 31 is a schematic view showing a pulled-out state of the operating handle of the circuit breaker of the present invention;
fig. 32 is a schematic diagram of a circuit breaker outlet according to the present invention;
fig. 33 is a schematic view of a wiring portion of a circuit breaker outlet housing according to the present invention;
fig. 34 is a schematic view of a circuit breaker wire frame assembly of the present invention;
fig. 35 is an exploded view of a circuit breaker wire frame assembly of the present invention;
fig. 36 is a schematic diagram of a circuit breaker wire frame structure of the present invention;
FIG. 37 is a schematic diagram of a circuit breaker wire frame according to the present invention;
fig. 38 is a second longitudinal cross-sectional view of the circuit breaker wire frame of the present invention;
fig. 39 is a schematic view of a circuit breaker wire screw configuration of the present invention;
FIG. 40 is a schematic view of a circuit breaker copper bar structure of the present invention;
fig. 41 is a schematic diagram of a circuit breaker wiring spring structure of the present invention;
fig. 42 is a schematic diagram of a circuit breaker wiring spring structure II according to the present invention;
FIG. 43 is a schematic view of a circuit breaker wiring spring status of the present invention;
fig. 44 is a schematic view of a rear spring plate structure of the circuit breaker according to the present invention;
FIG. 45 is a schematic view of a state of a rear spring of the circuit breaker according to the present invention;
fig. 46 is a schematic view of a circuit breaker wire frame assembly of the present invention prior to wire connection;
fig. 47 is a schematic view of the circuit breaker terminal block assembly of the present invention after wiring.
In fig. 1-47, the relevant reference numerals are as follows:
1. a manual operation unit; 101. an operation handle; 102. a linkage member; 103. locking and unlocking the piece; 104. an intermediate transmission member; 105. a trip button return spring; 106. a trip button; 107. a cam transmission member; 2. an electric operation unit (bidirectional magnetic holding means); 201. a yoke; 202. a yoke; 203. a transmission shaft; 204. magnetic steel; 205. a stationary core; 206. a movable iron core; 207. an energy storage spring; 208. a magnetic cage; 208a, a magnetic steel installation groove; 208b, coil winding grooves; 208c, iron core through holes; 209. a coil; 3. a snap protection unit; 301. trip armature assembly; 301a, an armature; 301b, trip slider; 301b-1, slide plate mesopores; 301b-2, slide plate spring positioning holes; 301b-3, slide plate catching groove; 302. a trip shaft; 303. a copper bar; 304. A trip slider return spring; 305. a U-shaped magnetic yoke; 4. a moving contact system; 401. a moving contact support; 401a, ejector pins; 402. a contact spring; 403. a moving contact; 404. soft connection; 405. a reaction force spring; 5. a static contact system (including a shunt detection system); 501. a stationary contact; 502. a shunt; 502a, lead-out wires; 502b, shunt body (resistance); 503. the incoming line is connected with the wire clamp; 6. an arc extinguishing system; 7. a wire inlet end (main loop and control signal wiring); 8. outlet terminal (user main loop quick connection); 801. a wire frame; 801a, threaded holes; 801b, T-shaped structure; 801c, pin shaft holes; 801d, mounting positioning holes; 801e, limit grooves; 801f, a binding screw support; 802. a binding screw; 802a, screw heads; 802b, a conical structure; 802c, a stud; 802d, back end; 802e, a conical structure; 802f, end faces; 803. a wire pressing elastic sheet; 803a, holes; 803b, a first wire pressing claw; 803c, a second wire pressing claw; 803d, guide grooves; 804. a shaft; 805. a rear spring plate; 805a, positioning holes; 805b, inclined tabs; 801e, limit grooves; 806. a copper bar; 806a, a bent plate; 9. an electronic control and man-machine interaction unit; 901. a mechanism action monitoring mechanism; 902. a contact position monitoring mechanism; 903. a breaker status indication mechanism; 10. a housing; 10a, wiring holes; 10b, screw operation holes; 10c, cavity; and 10d, positioning the convex hull.
Detailed Description
The present invention will be described in further detail with reference to the drawings and the specific embodiments, but it should not be construed that the scope of the present invention is limited to the embodiments described below.
It should be noted that the following embodiments relate to orientations (e.g., front, back, left, right, up, down, etc.) only with respect to the positions in the drawings, and are for convenience of description and understanding, and are not limited to the actual positions of the products in physical space.
Referring to fig. 1-42, the overall, mechanical and component structures of the circuit breaker of the present invention are shown and described in detail below.
1. General scheme
Referring to fig. 1, the overall structure of the circuit breaker of the present invention is shown. As shown in fig. 1, the circuit breaker of the present invention is composed of a manual operation unit 1, an electric operation unit 2, a snap action protection unit 3, a moving contact system 4, a static contact system 5 (including a shunt detection system), an arc extinguishing system 6, a wire inlet end (main circuit and control signal connection) 7, a wire outlet end (user main circuit quick connection) 8, an electronic control and man-machine interaction unit 9, a housing 10, etc., wherein: the manual operation unit 1 includes an operation handle 101, a linkage member 102, a lock unlocking member 103, an intermediate transmission member 104, a trip button 105, a return spring 106, a trip button 107, a cam transmission member, and the like (as shown in fig. 23 to 26), and can perform manual opening and closing and emergency tripping; the electric operation unit 2 is a bidirectional magnetic holding device, and is further provided with a snap protection unit 3, a moving contact system 4, a static contact system 5, a shunt detection system and the like, so that switching on and switching off can be performed rapidly; the movable contact system 4, the fixed contact system 5, the shunt detection system and the arc extinguishing system 6 form a contact and an arc extinguishing unit; the wire inlet end 7 is used for connecting the main loop and the control signal, and the wire outlet end 8 is used for connecting the main loop of the user quickly; the electronic control and man-machine interaction unit 9 detects the current breaker state (through a mechanism action monitoring 901 mechanism and a contact position monitoring 902 detection mechanism) and receives control signals (the remote control is active control and the overload protection is passive control), and when the electronic control unit 9 receives a closing instruction, the closing action of the bidirectional magnetic holding device is triggered; when the electronic control unit 9 receives a brake-off or a brake-off releasing command, the brake-off action of the bidirectional magnetic holding device is triggered, wherein the state of the breaker is indicated by a breaker state indicating mechanism 903 (such as an LED lamp).
The various subsystems, mechanisms and important components are further described below.
2. Control system
Referring to fig. 2-4, the circuit configuration, control scheme and process of the electronic circuit breaker of the present invention are shown. The circuit breaker comprises a bidirectional magnetic holding device and a snap protection unit 3, wherein the bidirectional magnetic holding device is used for driving a moving contact and a fixed contact of the circuit breaker to open or close, and providing corresponding magnetic holding force when the circuit breaker is opened or closed, the snap protection unit 3 is used for tripping the moving contact and the fixed contact to open when the circuit breaker is in fault, and a circuit breaker control system can automatically detect the state of the circuit breaker and receive external control signals so as to trigger the action of the bidirectional magnetic holding device to open or close according to the state of the circuit breaker or the external control signals, or trigger the action of the snap protection unit 3 to enable the moving contact 403 and the fixed contact 501 to rapidly trip to protect when the circuit breaker is overloaded or in short circuit fault.
In addition, the circuit breaker control system is provided with an electronic control and man-machine interaction unit 9 provided with a circuit breaker mechanism action monitoring mechanism 901, a contact position monitoring mechanism 902 and a circuit breaker status indicating mechanism 903 so as to more effectively monitor the circuit breaker operation process and status.
As shown in fig. 2, the circuit breaker control system is preferably provided with an MCU connected to the driving circuits DRV-Wa and DRV-Wb of the bidirectional magnetic holding device and the driving circuit of the surge protection unit 3 for outputting MCU control signals to the coils Wa, wb of the bidirectional magnetic holding device and the control part of the surge protection unit 3 to drive the bidirectional magnetic holding device and the surge protection unit 3 to operate. In addition, the circuit breaker control system is configured with a hardware protection circuit (haedwarreetection), the hardware protection circuit is connected with the MCU, the hardware protection circuit and the MCU are respectively connected with a plurality of sensors (such as a temperature-sensitive sensor Rt and the like) to acquire circuit breaker running state detection signals such as voltage acquisition signals Ve and Vin, current acquisition signals I_s and temperature acquisition signals Tam, T1 and T2 and the like, so that the MCU can control the bidirectional magnetic holding device and the transient protection unit to act. After the MCU is arranged, the circuit breaker is quick in response and high in precision, and control performance is effectively improved.
As shown in fig. 3, the driving signal of the circuit breaker in the present invention is PWM (pulse width modulation) signal, and the corresponding output square wave current signal (current) is approximately square wave in the switching states (open and close). As shown in fig. 4, during operation, because of the energy storage spring, the forward force of the transmission shaft 203 is larger than the reverse force during closing, which is beneficial to quick closing.
In the invention, the MCU controls the electronic solid-state switching device (48V of Input and Output voltage) of the circuit breaker in a state machine mode, wherein the circuit breaker state comprises self-checking, dormancy, standby, full closing and protection states, the MCU controls the circuit breaker to switch between the states, and the circuit breaker state can be displayed by the LED.
In the invention, the MCU is provided with an auxiliary power supply (aux power) to ensure reliable power supply, and is connected with various communication interfaces (such as RS485 and the like) to receive or output corresponding signals (such as enabling signals RS485/EN, driving signals RS485/DRV and the like) so as to monitor the control signals and the detection signals of the circuit breaker and refresh the running state of the circuit breaker at fixed time and store or upload corresponding data locally. The circuit breaker control system concatenates a current limiting inductance Lsc before a sampling resistance Is between a circuit breaker mechanical switching breakpoint Ke and an electronic solid state switching device to protect the electronic solid state switching device.
3. Bidirectional magnetic holding executing mechanism
Referring to fig. 5 to 9, the circuit breaker of the present invention relates to a state of closing, opening, releasing, and opening, and the corresponding operating mechanism is composed of a manual operating unit 1, an electric operating unit 2, a snap protection unit 3, a moving contact system 4, a fixed contact system 5, a shunt detection system, and the like, wherein a transmission shaft 203, a trip shaft 302, and a moving contact support 401 in the operating mechanism are important executing components, and the following description is given.
As shown in fig. 7 to 9, the circuit breaker of the present invention is provided with a transmission shaft 203 that can be manually or electrically operated to perform lateral movement and a trip shaft 302 that can be manually or electrically operated to perform lateral movement and vertical movement, the trip shaft 302 being located between the transmission shaft 203 and a moving contact support 401, the transmission shaft 203 being configured with an energy storage mechanism and a holding mechanism; when the switch-on is performed, the energy storage mechanism releases energy, the movable contact and the fixed contact are combined to be switched on by driving the transmission shaft 203, the tripping shaft 302 and the movable contact support 401 to move towards the switch-on direction, and when the switch-on is performed, the holding mechanism provides switch-on holding force; when the brake is released, the movable contact support 401, the tripping shaft 302 and the transmission shaft 203 are reset towards the brake releasing direction, and when the brake is released, the retaining mechanism provides brake releasing retaining force and stores energy for the energy storage mechanism; when overload or short circuit occurs, the tripping shaft 302 is driven to vertically move, so that the tripping shaft 302 is separated from the transmission shaft 203 and the moving contact support 401 to perform tripping and opening protection (as shown in fig. 4-6). The movable contact support 401 is provided with a movable contact spring and a return reaction spring so as to provide a closing pressure at the time of closing and a switching-off restoring force at the time of switching off.
In the invention, a corresponding retaining mechanism is arranged for ensuring the stable and reliable switching-on and switching-off of the circuit breaker. Preferably, the holding mechanism is a bidirectional holding executing mechanism, in particular to a bidirectional magnetic holding device, which can rapidly and reliably perform switching on/off and provide magnetic holding force when the switching on/off is completed so as to ensure the state stability of the circuit breaker.
Referring to fig. 7 to 17, the bi-directional magnetic latching device includes a yoke including a yoke frame 201 and a yoke end plate 202, the yoke frame 201 having a U shape, the yoke end plate 202 being fitted to an opening of the yoke frame 201 and fixed, wherein yoke through holes are respectively provided at the bottom of the yoke frame 201 and the yoke end plate 202 to pass through the transmission shaft 203. Thus, the magnetic steel 204 is fixedly arranged inside the magnetic yoke, the movable iron core 206 is arranged in the transmission shaft 203 and is accommodated in the cavity of the magnetic yoke, the transmission shaft 203 is movably arranged on the magnetic yoke, the left side static iron core and the right side static iron core 205 are respectively fixed on two sides of the magnetic yoke, the magnetic steel and the left side static iron core form a brake separating magnetic circuit, the magnetic yoke, the magnetic steel and the right side static iron core form a brake closing magnetic circuit, the brake separating magnetic circuit provides brake separating magnetic holding force for the transmission shaft 203 when brake separating is completed, and the brake closing magnetic circuit provides brake closing magnetic holding force for the transmission shaft 203 when brake closing is completed.
Specifically, a magnetic holder 208 is further provided, the transmission shaft 203, the magnetic steel 204, the movable iron core 206, the left stationary iron core and the right stationary iron core 205 are respectively attached to the magnetic holder 208, the magnetic holder 208 is fixedly attached to the inside of the yoke, and the magnetic steel 204, the movable iron core 206, the left stationary iron core and the right stationary iron core 205 are respectively attached to the magnetic holder 208. Here, the magnetic holder 208 is provided with an iron core through hole 208c in the axial direction, and the transmission shaft 203, the movable iron core 206, the left side static iron core, and the right side static iron core 205 are respectively mounted on the iron core through hole 208c, wherein the left side static iron core and the right side static iron core 205 are respectively positioned at two ends of the iron core through hole 208 c; in addition, a magnet steel mounting groove 208a is provided in the middle of the outer periphery of the magnet holder 208, coil winding grooves 208b are provided on both sides of the magnet steel mounting groove 208a on the outer periphery of the magnet holder 208, the magnet steel 204 is mounted in the magnet steel mounting groove 208b, and coils 209 on both sides are wound around the corresponding coil winding grooves 208c, respectively.
In addition, a corresponding energy storage mechanism is arranged in the bidirectional magnetic holding device, and the bidirectional magnetic holding device specifically comprises an energy storage spring 207, wherein the energy storage spring 207 is sleeved on the transmission shaft 203 and is positioned between the movable iron core 206 and the left static iron core 205, so that energy is stored during opening and energy is released during closing so as to accelerate the closing speed. Here, the movable iron core 206 is provided with a storage spring cavity, and the storage spring 207 may be installed in the storage spring cavity to be positioned so as to maintain stability of the storage spring 207.
3. Contact system
The moving contact and the fixed contact of the circuit breaker can be switched on and off through the bidirectional magnetic holding device, and can also be used for tripping and switching off protection through the instantaneous protection unit in overload or short-circuit fault, as described in detail below.
Referring to fig. 18, the present invention is a circuit breaker with bidirectional magnetic latching function, whose operating mechanism is configured with bidirectional magnetic latching device, instantaneous protection unit 3, moving contact system 4, static contact system 5, shunt detection system, etc., and can rapidly perform switching-off, switching-on and tripping switching-off, wherein the circuit breaker can be operated manually or electrically, as described in detail below.
Referring to fig. 19 to 21, the switching-on state, the switching-off state and the switching-off completion state of the bidirectional magnetic latching device of the circuit breaker are shown. Referring also to fig. 22-26, the circuit breaker opening and closing and tripping protection process is shown, as described in detail below.
For convenience, the right direction is defined as a closing direction, and the left direction is defined as a opening direction, which will be described in detail below.
(one) Manual operation
As shown in fig. 19-26, referring to fig. 28 and 31, the operating handle 101 is manually pushed to push the linkage member 102 to move forward together, the linkage member 102 drives the transmission shaft 203 of the bidirectional magnetic holding device to move forward together to push the trip shaft 302 and the moving contact system 4 to move forward, so as to close and hold the contacts of the moving contact system 4 and the fixed contact system 5, namely, the circuit breaker is turned on; the operation handle 101 is manually pulled, the linkage piece 102 is pulled to move backwards together, the linkage piece 102 drives the transmission shaft 203 of the bidirectional magnetic holding device to move backwards together, the moving contact system 4 moves backwards under the action of the contact spring 402 and the counter-force spring 405, and the separation and the holding of the moving contact system 4 and the fixed contact system 5 are realized, namely the circuit breaker is opened.
When the magnetic steel 204 of the bidirectional magnetic holding device and a closing magnetic circuit (right side) formed by the magnetic yokes 201 and 202 and the static iron core 205 (right side) provide magnetic holding force during closing, and the contact spring 402 in the moving contact system 4 provides contact pressure to ensure reliable connection; when the switch-on magnetic circuit of the bidirectional magnetic holding device is disconnected, the switch-on magnetic circuit moves backwards due to manual pulling to generate an air gap L2, further, the contact spring 402 and the counter-force spring 405 provide counter force to enable the moving contact to be separated quickly, meanwhile, the tripping shaft 302 moves backwards under the action of the ejector rod 401a of the moving contact supporting piece 401, the magnetic steel 204 of the bidirectional magnetic holding device and the switch-off magnetic circuit (left side) formed by the magnetic yokes 201 and 202 and the static iron core 205 (left side) provide magnetic holding force to ensure reliable disconnection, and the gap of the moving contact is L1.
(II) electric operation
The electric operation includes overload or short-circuit protection actions in addition to opening and closing. The method specifically comprises the following steps: the electronic control and man-machine interaction unit 9 takes electricity from the incoming line end 7, detects the current breaker state (detected by the mechanism action monitoring 901 and the contact position monitoring 902) and receives a control signal (the remote control is active control and the overload protection is passive control), when the electronic control unit 9 receives a closing instruction, the closing action of the bidirectional magnetic holding device is triggered, namely the movable iron core 206 and the transmission shaft 203 move forwards to realize closing; when the electronic control unit 9 receives a brake-separating or tripping brake-separating instruction, the brake-separating action of the bidirectional magnetic holding device is triggered, namely the movable iron core 206 and the transmission shaft 203 move backwards to realize brake separation. When the switch is opened and closed, the logic relationship is the same as that of manual operation, and the description is omitted.
It should be noted that, during the manual operation and the electric operation of the switching on/off, the default circuit breaker and the distribution line are in a non-fault state, and at this time, the instantaneous trip unit 3 ensures that the trip shaft 302 drives between the transmission shaft 203 of the bidirectional magnetic latching device and the ejector 401a of the moving contact support 401 under the action of the spring 304. If the instantaneous protection unit 3 acts, the overload or short-circuit protection action is the same as the logic of the electrically operated brake release.
(III) instantaneous protection trip operation
The invention provides a snap protection unit 3 which is provided with a tripping shaft 302, wherein the tripping shaft 302 can be manually or electrically operated to carry out transverse movement and vertical movement, the tripping shaft 302 is positioned between a transmission shaft 203 and a moving contact support 401, and when overload or short circuit occurs, the tripping shaft 302 is driven to vertically move so as to separate the tripping shaft 302 from the transmission shaft 203 and the moving contact support 401 for carrying out tripping brake-separating protection.
The trip protection unit 3 is configured with a trip armature assembly 301 for a trip shaft 302 to drive the trip shaft 302 to move vertically. Trip armature assembly 301 includes an armature 301a and a trip slide 301b, trip slide 301b being provided with a transverse slide-in hole 301b-1, and a trip shaft 302 mounted within trip slide-in hole 301b-1 such that trip shaft 302 is movable transversely on trip slide 301b and vertically with the trip slide.
Wherein the surge protection unit 3 is provided with a U-shaped yoke 305 and an armature 301a, wherein a slide plate catching groove 301b-3 is provided at the bottom of the trip slider armature 301a, and the armature slider is placed in the catching groove 301b-3 to be caught with the trip slider 301 b. In this way, the armature 301a is installed in the U-shaped magnetic yoke, the trip copper bar 303 is penetrated between the armature 301a and the U-shaped magnetic yoke 305 to be electrified, the trip slider 301b is connected with the armature 301a, and the trip slider return spring 304 is respectively applied to the trip slider 301b and the U-shaped magnetic yoke 305, so that the trip slider 301b can be reset. Here, the trip slider 301b is provided with a spring positioning hole 301b-2, and the slider return spring 304 can be fitted into the spring positioning hole 301b-2 for positioning so that the slider return spring 304 is stable when it expands and contracts.
In the present invention, the trip shaft 302 is in contact with the moving contact support 401, rather than directly contacting the contact 403. At this time, a support rod 401a is further provided to the movable contact support 401, and the trip shaft 302 is brought into contact with or separated from the support rod 401a to realize manual or electric switching on/off or trip switching off.
It will be appreciated that the snap protection unit 3 needs to take electricity, which is achieved by the copper bars 303. At this time, a flexible connection wire 404 is disposed between the copper bar 303 and the moving contact 403, and two ends of the flexible connection wire are respectively connected with the copper bar 303 and the moving contact 403, so as to adapt to the requirement of the moving contact 403.
Referring to fig. 22-26, the instantaneous protection trip operation of the present invention includes 3 stages, wherein fig. 22, 26 are the initial and completed states, respectively, fig. 23 shows the first stage of trip, fig. 24 shows the second stage of trip, and fig. 25 shows the third stage of trip; when a short circuit fault occurs in a circuit of the power utilization system, short circuit current occurs in the circuit, namely current in the circuit is extremely large, and the static contact system 5 and the shunt detection system monitor the fault current at the moment and trigger the tripping and opening actions of the bidirectional magnetic latching device; meanwhile, because the copper bar 303 is penetrated between the armature 301a and the U-shaped yoke 305 on the trip assembly 301 provided in the instantaneous protection unit 3, when a short-circuit large current flows, a magnetic field is generated between the U-shaped yoke 305 and the armature 301a, and thus the armature 301a drives the trip slider 301b and the trip shaft 302 to move downwards together and rapidly; because the tripping shaft 302 is arranged between the middle holes of the tripping sliding plate 301b, when the tripping shaft 302 is pulled out, the static state of the transmission shaft 203, the tripping shaft 302, the moving contact support 401 (the moving contact support ejector rod 401 a), the contact spring 402, the moving contact 403 and the static contact system 501 is broken, and the moving contact 403 and the moving contact support 401 rapidly move backwards under the action of the contact spring 402 and the moving reset counter-force spring 405, so that the tripping and opening of the circuit breaker are realized; further, the bidirectional magnetic latching device completes the switching action. Thereafter, the armature 301a and the trip slider 301b return to the initial position by the trip slider return spring 304, thereby pushing the trip shaft 302 to the initial position.
5. Current and voltage detection mechanism of contact system, contact position detection and indication structure
Referring to fig. 27, the present invention includes contact position detection and system status indication, which is a contact system with a power detection function. In general, current sensing of the prior art typically employs diverter screws fastened or welded in the middle of the main loop. In contrast, the invention adopts the scheme of integrating the contact system and the current divider so as to reduce the internal resistance of a loop and reduce the running power consumption of a product.
Referring to fig. 27, the current divider 502 is a flat plate bent type, one end of the current divider is provided with a fixed contact 501 so as to be in contact with and separate from a movable contact 403 to realize connection and disconnection of a main circuit, and the other end of the current divider 502 is welded with a wire inlet terminal clamp 503 for reliable connection with a system circuit, so that a pluggable function is realized to be easy to maintain. Here, the shunt 502 is divided into a shunt main body 502b and a shunt lead-out wire 502a, and is provided on one side of the shunt main body 502b for power taking and current measurement by the electronic control unit.
6. Emergency tripping mechanism
The electric operating unit of the invention has a bidirectional magnetic latching actuator, the structure of which is as previously shown. The mechanism can be either manual or electric, and the emergency release mechanism is described below with particular reference to the manual operation and the electric operation described above.
Referring to fig. 28 to 31, a structure and manner of the manual operation unit are shown, wherein fig. 28 is an initial state of the manual emergency trip structure, fig. 29 is a schematic view of a trip button operation in a manual trip button pressed state, fig. 30 is a schematic view of a lock release operation in a lock release pressed state, and fig. 31 is a schematic view of an operation handle in an operation handle pulled state.
As described above, the circuit breaker of the present invention has a contact system structure with a trip function, which is provided with the instantaneous protection unit 3, and can perform trip opening protection by manual operation of the emergency trip mechanism.
As shown in fig. 28 to 31, the manual operation unit 1 includes an operation handle 101, a link member 102, a lock release member 103, an intermediate transmission member 104, a trip button return spring 105, a trip button 106, a cam transmission member 107, a trip armature assembly 301, and the like, and the specific operation manner is as follows.
In the closing state, the trip button 106 is pressed down, the cam transmission piece 107 is pushed to rotate clockwise, the cam presses the trip sliding plate assembly 301 to move downwards, the product is tripped and separated, meanwhile, the trip button 106 triggers the electronic control unit 9 to operate electrically, and the bidirectional magnetic holding device acts to the separating state. After release of trip button 106, trip slider assembly 301 returns to the original position under the action of trip slider return spring 304, while trip button 106 returns to the original state under the action of button return spring 105.
In addition, under the closing state, the product can be firstly released from the buckle to open the brake when being loaded into the power distribution cabinet, so that the product safety is ensured. The specific process is that the power distribution cabinet frame (not shown) presses the locking unlocking piece 103 to rotate anticlockwise, then presses the middle transmission piece 104 to rotate clockwise, then pushes the tripping button 106 to move leftwards, pushes the cam transmission piece 107 to rotate clockwise, the cam presses the tripping sliding plate assembly 301 to move downwards, the product trips to open the gate, meanwhile, the tripping button 106 triggers the electronic control unit 9 to operate electrically, and the bidirectional magnetic holding device acts to an open gate state. Upon release of trip button 106, trip slider assembly 301 returns to its original position under the influence of trip slider return spring 304. Meanwhile, the trip button 106 returns to the initial state under the action of the button return spring 105, the locking and unlocking piece 103 is sprung up after entering the frame, and is not pressed, and the circuit breaker returns to the initial state.
Pulling the operating handle 101 to drive the linkage 102 to move rightwards, and opening the breaker (the specific process is seen in the manual operating part); continuing to pull the operating handle 101, driving the locking unlocking piece 103 to rotate anticlockwise, further pressing the intermediate transmission piece 104 to rotate clockwise, further pushing the tripping button 106 to move leftwards, pushing the cam transmission piece 107 to rotate clockwise, pressing the tripping sliding plate assembly 301 to move downwards, tripping and opening a product, and returning the tripping sliding plate assembly 301 to an initial position under the action of the tripping sliding plate return spring 304 after the operating handle 101 is released. Meanwhile, the trip button 106 returns to the initial state under the action of the button return spring 105, the locking and unlocking piece 103 is reset and not pressed, the operating handle returns to the initial position under the action of the handle return spring, and the circuit breaker returns to the initial state.
7. Wire outlet terminal wiring structure
The invention further improves the structure of the outgoing line end of the circuit breaker and the wire frame assembly, and the structure is as follows.
Referring to fig. 32, a schematic diagram of the circuit breaker outlet termination line of the present invention for use in customer main loop quick connect wiring is shown. The outlet terminal wiring structure is composed of the housing 10, the wire frame assembly 8 and other components, and the specific structure is as follows.
Referring to fig. 33, a schematic view of the structure of the wiring portion of the housing is shown. The front end of the shell 10 is provided with a wiring hole 10a and a wiring screw operation hole 10b for wiring the customer; the side face of the wire frame is provided with a cavity 10c and a positioning convex hull 10d for being fixedly installed with the wire frame 8.
Referring to fig. 34-47, the structure of the circuit breaker wire frame assembly is shown, wherein fig. 34-35 are the wire frame assembly structure and explosion schematic diagram, fig. 36-38 are the wire frame structure schematic diagram, fig. 39 is the wire screw structure schematic diagram, fig. 40 is the copper bar structure schematic diagram, fig. 41-43 are the wire spring structure and state schematic diagram, fig. 44-45 are the rear spring structure and state schematic diagram, fig. 46 is the wire frame assembly pre-wiring schematic diagram, and fig. 47 is the wire frame assembly post-wiring schematic diagram. The details are described below in connection with fig. 34-47.
As shown in fig. 34-35, a schematic view of the structure and explosion of the wire frame assembly is shown, the wire frame assembly 8 is installed in the inner cavity 10c of the housing 10, and is composed of a wire frame 801, a wire bolt 802, a wire pressing spring 803, a shaft 804, a positioning spring 805 and a busbar 806. The wire frame 801 is in a cage structure, is installed in a cavity 10c of the housing 10 through an installation positioning hole 801d, and is limited by the installation positioning hole 801d, so that the wire frame assembly 8 is assembled in the housing 10.
As shown in fig. 36-38, the wire frame 801 has a cage structure, and a threaded hole 801a is formed at the front end to be matched with a stud 802c provided on the wire screw 802; the rear end is provided with a limit groove 801e, and an inclined plate 805b arranged on the rear spring plate 805 is clamped in the limit groove 801e to realize fixation so as to avoid falling out; the upper ends of the two sides are provided with T-shaped structures 801b which are matched with a bent plate 806a with a T-shaped groove arranged on the copper bar 806 to realize front and back and upper and lower limiting; the upper ends of the two sides are also provided with pin shaft holes 801c, a shaft 804 passes through the pin shaft holes 801c and holes 803a on the wire pressing elastic sheet 803, and the wire pressing elastic sheet 803 can be turned around the shaft 804 in the wire connecting frame 801; and mounting and positioning holes 801d are further formed in two sides of the wiring frame 801 and are used for matching the set position convex hulls 10d in the cavity 10c of the shell 10 to realize mounting and positioning. Further, a binding screw supporting portion 801f is provided at the bottom of the binding frame 801 to support the binding screw.
As shown in fig. 39, the front end of the binding screw 802 is provided with a screw head 802a, including but not limited to cross grooves, straight grooves, internal hexagonal grooves, etc.; the front end of the stud 802c is a conical structure 802b, so that the front end of the stud is positioned with a threaded hole 801a arranged on the wire frame 801; stud 802c is matched with front end threaded hole 801a of wire frame 801; the diameter of the rear end 802d is larger than that of the stud 802c, and the end face 802f is used for limiting the reverse screwing-out of the screw, so that the user can be prevented from detaching the wire screw 802 and separating from the wire frame 801; the rear end is provided with a conical structure 802e which is matched with a position hole 805a set by the rear spring plate 805, namely, the wiring screw 802 is erected between the wiring frame 801 and the rear spring plate 805. When the wiring screw 802 is screwed into the rear conical structure 802e to push the wire pressing elastic sheet 803 to turn over, the rear cylindrical surface 802d props against the wire pressing elastic sheet 803 to keep at the wire pressing position, so that reliable wiring is realized.
As shown in fig. 40, copper bar 806 is provided with a T-grooved bent plate 806a that mates with the wire frame to facilitate positioning after assembly in place.
As shown in fig. 41 to 43, the wire-connecting elastic piece 803 is bent with a hole 803a matching with the shaft 804, and a first wire-pressing claw 803b and a second wire-pressing claw 803c for pressing a wire or a terminal, i.e., at least one wire-pressing claw of the wire-connecting elastic piece; a guide groove 803d is further provided, and the guide groove cooperates with a conical surface 802e provided on the binding screw 802 to realize guide overturning so as to ensure reliable binding, and the initial state and the deformation state of the guide groove are respectively represented by T1 and T2.
As shown in fig. 44-45, the wire screw 802 is prevented from being removed from the threaded hole 801a of the wire frame 801, the wire screw is screwed out to avoid damage of the violent operation of the wire frame assembly, but the wire screw 802 can be guaranteed to be reversely screwed out, and the initial state and the deformation state are respectively represented by Z1 and Z2.
As shown in fig. 46 to 47, the state before and after wiring is shown. When the initial state is not wired, the wired screw 802 is on the outer side, the wire pressing elastic sheet 803 is not stressed, and is in a loose state, as shown in fig. 39. When the wire or the wiring terminal is connected, the wire or the wiring terminal is inserted into the wiring hole 10a on the face cover of the shell 10, the wiring screw 802 is operated, the wire pressing elastic sheet 803 is pushed to turn around the shaft 804 anticlockwise by the conical surfaces and the cylindrical surfaces of the characteristics 802d and 802e along with the screwing of the wire pressing screw 802 into the inner side of the wiring frame 801, and when the first claw 803b and the second claw 803c press the wire or the wiring terminal, the wire pressing screw 802 is continuously operated to screw into the inner side of the wiring frame 801, and the first claw 803b and the second claw 803c press the wire or the wiring terminal. At this time, the terminal 802 is continuously operated to be screwed into the inside of the terminal frame 801, and finally, the screw is removed from the screw hole 801a provided in the terminal frame 801, as shown in fig. 40.
The wire outlet end adopts the rapid wiring mode, has the functions of anti-riot operation and the like, and can avoid product damage caused by manual violent wiring. It should be noted that, each spring plate structure in the above-mentioned outlet end structure is only used for convenience of description, and is not used for limiting the specific type of the elastic member.
Although the present embodiment is disclosed above, it is not limited thereto, and any person skilled in the art can make possible variations and modifications without departing from the spirit and scope of the present embodiment, so that the protection scope of the present embodiment shall be defined by the claims of the present embodiment.
Claims (8)
1. The circuit breaker contact system comprises a moving contact system, a fixed contact and a shunt detection system, and is characterized in that a bidirectional magnetic holding device and a transient protection unit are configured, wherein the bidirectional magnetic holding device is provided with a transmission shaft which can be manually or electrically operated to perform transverse movement, the transient protection unit is provided with a tripping shaft which can be manually or electrically operated to perform transverse movement and vertical movement, the tripping shaft is positioned between the transmission shaft and a moving contact support member, and the transmission shaft is provided with an energy storage mechanism and a holding mechanism; the two-way magnetic holding device comprises a magnetic yoke, magnetic steel, a movable iron core, a left side static iron core and a right side static iron core, wherein the magnetic steel is fixedly arranged in the magnetic yoke, the movable iron core is arranged in a transmission shaft and is accommodated in the magnetic yoke, the transmission shaft can be transversely movably arranged in the magnetic yoke, the left side static iron core and the right side static iron core are respectively fixed on two sides of the magnetic yoke, the magnetic steel and the right side static iron core form a closing magnetic circuit so as to provide closing magnetic holding force when closing, and the magnetic yoke, the magnetic steel and the left side static iron core form a closing magnetic circuit so as to provide opening magnetic holding force when opening; the energy storage mechanism is applied to the movable iron core to accelerate closing; the instantaneous protection unit is provided with a U-shaped magnetic yoke, an armature, a trip slide plate and a trip slide plate reset spring, wherein the armature is arranged in the U-shaped magnetic yoke, a trip copper bar is arranged between the armature and the U-shaped magnetic yoke in a penetrating way, the trip slide plate is connected with the armature, the trip slide plate reset spring is respectively applied to the trip slide plate and the U-shaped magnetic yoke, and a trip shaft can move along with the trip slide plate; when the switch is closed, the energy storage mechanism releases energy, the transmission shaft, the tripping shaft and the moving contact support piece are driven to move towards the switch-on direction, and when the switch is closed, the holding mechanism provides switch-on holding force; when the brake is separated, the movable contact support piece, the tripping shaft and the transmission shaft are reset towards the brake separating direction, and the retaining mechanism provides brake separating retaining force when the brake is separated, and stores energy for the energy storage mechanism; when overload or short circuit occurs, the tripping shaft is driven to vertically move, so that the tripping shaft is separated from the transmission shaft and the moving contact support piece to perform tripping and opening protection.
2. The circuit breaker contact system of claim 1, wherein the energy storage mechanism comprises an energy storage spring nested within the drive shaft and positioned between the moving core and the left stationary core.
3. The circuit breaker contact system of claim 2 wherein the plunger is provided with a reservoir spring cavity into which the reservoir spring is received for positioning.
4. The circuit breaker contact system of claim 1, wherein the trip slide is provided with a trip slide central bore, and the trip shaft is mounted in the trip slide central bore.
5. The circuit breaker contact system of claim 4, wherein the trip slider bottom is provided with a catch slot, and the armature is disposed in the catch slot to engage the trip slider.
6. The circuit breaker contact system of claim 4, wherein the trip slider is provided with a spring retention hole into which the slider return spring can be received for retention.
7. The circuit breaker contact system of claim 4, wherein a soft wire is provided before the trip copper bar and the moving contact support, and both ends of the soft wire are respectively coupled to the trip copper bar and the moving contact support.
8. The circuit breaker contact system of any one of claims 1 to 7, wherein the moving contact supporter is provided with a supporter jack, the trip shaft is manually or electrically switched on, off, or off by contacting or disengaging with the supporter jack, and the moving contact supporter is provided with a moving contact spring and a return reaction spring to provide a switching-on pressure at the time of switching on and a switching-off restoring force at the time of switching off.
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| CN206864415U (en) * | 2017-05-27 | 2018-01-09 | 西一电气有限公司 | Modular circuit breaker spring operating mechanism |
| CN206864414U (en) * | 2017-05-27 | 2018-01-09 | 西一电气有限公司 | Energy storage closing trip gear |
| CN207134311U (en) * | 2017-07-01 | 2018-03-23 | 中欧电气有限公司 | A kind of arc protection rapid closing structure |
| CN109087833A (en) * | 2018-08-31 | 2018-12-25 | 宁波耀华电气科技有限责任公司 | A kind of Monostable permanent magnetism operating mechanism |
| CN209119030U (en) * | 2018-12-14 | 2019-07-16 | 北京双杰电气股份有限公司 | Passive tripping is kept and mechanical recovery device |
| CN112071723A (en) * | 2020-07-21 | 2020-12-11 | 西安交通大学 | Permanent magnet and repulsion force combined quick switch operating mechanism |
| CN112837977A (en) * | 2021-01-11 | 2021-05-25 | 嘉兴京硅智能技术有限公司 | Tripping protection device of electromechanical hybrid circuit breaker |
| CN214542092U (en) * | 2021-01-11 | 2021-10-29 | 嘉兴京硅智能技术有限公司 | Closing device of circuit breaker |
| CN214542099U (en) * | 2021-01-11 | 2021-10-29 | 嘉兴京硅智能技术有限公司 | Electromechanical composite circuit breaker |
| CN113161211A (en) * | 2021-04-30 | 2021-07-23 | 科都电气股份有限公司 | Circuit breaker device |
| CN113675048A (en) * | 2021-09-15 | 2021-11-19 | 天津工业大学 | Permanent magnet and spring bidirectional retaining mechanism |
| CN216928450U (en) * | 2021-12-24 | 2022-07-08 | 上海京硅智能技术有限公司 | Circuit breaker contact system |
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