CN116013743A - Synchronous tripping linkage device of multipole circuit breaker and working method thereof - Google Patents
Synchronous tripping linkage device of multipole circuit breaker and working method thereof Download PDFInfo
- Publication number
- CN116013743A CN116013743A CN202310057802.5A CN202310057802A CN116013743A CN 116013743 A CN116013743 A CN 116013743A CN 202310057802 A CN202310057802 A CN 202310057802A CN 116013743 A CN116013743 A CN 116013743A
- Authority
- CN
- China
- Prior art keywords
- comb
- circuit breaker
- rod
- synchronous
- tripping
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000005405 multipole Effects 0.000 title claims description 22
- 238000005452 bending Methods 0.000 claims abstract description 23
- 244000060701 Kaempferia pandurata Species 0.000 claims abstract description 12
- 235000016390 Uvaria chamae Nutrition 0.000 claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims description 23
- 230000007246 mechanism Effects 0.000 claims description 22
- 230000033001 locomotion Effects 0.000 claims description 15
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 5
- 238000001746 injection moulding Methods 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- 238000012797 qualification Methods 0.000 abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 11
- 238000013461 design Methods 0.000 description 11
- 230000009471 action Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 238000013459 approach Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000001960 triggered effect Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 208000025274 Lightning injury Diseases 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Images
Landscapes
- Breakers (AREA)
Abstract
The invention relates to a synchronous tripping linkage device of a multipolar circuit breaker and a working method thereof, the device comprises a comb rod, two ends of the comb rod are provided with a comb rod shaft pivot, a plurality of comb fingers are arranged on the comb rod and are arranged on the same row, the comb fingers comprise a comb finger bending section and a comb finger root straight section, an included angle is formed between the comb finger bending section and the comb finger root straight section, the comb finger root straight section is connected with the comb rod, and the comb rod, the comb rod shaft pivot and the comb fingers form a strip-shaped comb structure. The invention prevents the equipment from supplying power to open phase and not completely disconnecting the fault power supply, so that the maximum limit tripping current value of the circuit breaker is closer to the rated current value, the overcurrent tripping of the circuit breaker is more stable and reliable, the product qualification rate is improved, the fault rate of the circuit breaker is reduced, the vibration and impact resistance of the circuit breaker is improved, and the breaking capacity value of the circuit breaker is improved.
Description
Technical Field
The invention relates to a linkage device and a working method thereof, in particular to a synchronous tripping linkage device of a circuit breaker and a working method thereof.
Background
The circuit breaker is an important electricity control protection device which is provided with safe power supply and reliably operates, and synchronous tripping means that when any pole of the multipole circuit breaker is tripped due to fault current, other poles can synchronously cut off fault power supply in a short time. The main function of the synchronous tripping linkage device is that when the multipole circuit breaker encounters fault power supply impact such as overcurrent, short circuit, undervoltage, electric leakage, overheat, shunt excitation, lightning stroke and the like, the most sensitive one-pole tripping in the multipole circuit breaker is triggered firstly due to the short-board effect, namely the active tripping pole.
The synchronous tripping linkage device is a necessary device of the multipolar circuit breaker, if the structural design is unreasonable, the comb fingers are not in a bending state but are in a straight bar shape, because the clockwise limiting point of the transmission piece reaches the limit, the transmission piece does not clockwise rotate to the uplink space, and the straight bar-shaped comb fingers and the attraction force-bearing end of the armature piece are always at a certain included angle after being filled, so that the attraction force-bearing end of the armature piece is extruded, the included angle of the attraction stroke is reduced, the attraction distance is shortened, and the working end of the armature piece is close to or contacted with the force-bearing end of the unlocking part. Under the state, if the circuit breaker encounters overload current (1.5 In-2 In) or fault signals with a small amplitude, the armature plate attraction stress end starts to accelerate under the action of the fixed iron core electromagnetic attraction force but has no rotating speed, at the moment, the air gap is relatively large, the magnetic field intensity In the magnetic circuit is relatively small, so that the armature plate attraction end receives small electromagnetic attraction force, but the working end of the armature plate is close to or contacts with the stress end of the unlocking part, the armature plate does not need to apply work to the stress end of the unlocking part when the armature plate is started to form a certain speed, the unlocking resistance is too large or the armature plate is blocked due to static friction, and then the electromagnetic attraction force generated by the larger current can attract the armature plate to overcome static friction force to unlock the unlocking part. Therefore, the maximum limit tripping current of the circuit breaker is relatively large, namely when a 10A current can normally trip, the tripping current is increased to more than 15A because the synchronous tripping linkage device presses the armature plate to reduce the actuation stroke of the armature plate. The limit action current of the circuit breaker is large, the circuit breaker is unqualified in factory test if the circuit breaker is light, the qualification rate of finished products is reduced, and the circuit breaker is aged and burned out if the circuit breaker is heavy because the overcurrent trip is unstable or cannot be carried out, and the protected equipment is resistant to the overcurrent for a long time.
The synchronous tripping linkage device is unreasonable in structural design, if the design of comb fingers is too short, the active tripping pole of the circuit breaker unlocks and trips instantly, the crank mechanism triggering rod pushes the stress end of the transmission piece anticlockwise to enable the transmission piece to rotate anticlockwise and rapidly, the working end of the transmission piece presses the comb fingers of the synchronous tripping linkage device, the comb pivots at two ends of the synchronous tripping linkage device rotate around the mounting holes, and the rotation displacement and the pressing force are transmitted to other comb fingers in parallel through the comb rods of the synchronous tripping linkage device. However, as the design of the comb finger is too short, the attraction end of the armature sheet cannot be contacted or close to the fixed iron core, and the working end of the armature sheet pushes the stress end of the unlocking component, but the unlocking component cannot be completely unlocked, the fault that the driven tripping electrode cannot trip after the active tripping electrode of the circuit breaker trips occurs; if the comb finger is designed too long, after overcurrent protection of the circuit breaker occurs, the stressed end of the transmission piece rotates anticlockwise under the strong pushing of the trigger rod of the crank mechanism, and the working end of the transmission piece presses the comb finger of the synchronous tripping linkage device, so that the attraction end of the armature piece approaches to the fixed iron core, if the air gap stroke is extruded by the comb finger of the device to become 0 value, the pushing stroke of the trigger rod of the crank mechanism is still redundant, and at the moment, the circuit breaker handle, the crank mechanism and the like cannot rotate and reset to be in a clamping state. The breaking distance between the fixed contact and the moving contact is reduced due to incomplete resetting of the crank motion mechanism, the interference opening distance is reduced, the rapid separation function is lost, the fault current cannot be rapidly broken, and the contact pair is burnt or burst due to high temperature of arc excitation due to long-time arcing.
The synchronous tripping linkage device is not matched, namely, the bending angle, bending position, thickness and the like of the comb finger are caused, so that the comb finger interferes to squeeze the attraction end of the armature plate, the working end of the armature plate is close to or contacts with the stress end of the unlocking part, the working end of the armature plate is acted by vibration centrifugal force, the high-frequency beating of the stress end of the unlocking part of the rotary swing arm structure triggers the unlocking and tripping mechanism to unlock and trip, the circuit breaker cannot normally run, the vibration resistance of the circuit breaker is deteriorated or the vibration resistance is lost, and safety accidents are caused by moving equipment.
Disclosure of Invention
The invention aims to: the invention aims to overcome the defects in the prior art, and provides a multipole circuit breaker synchronous tripping linkage device which can prevent equipment from power supply phase interruption and can not completely disconnect a fault power supply, so that the maximum limit tripping current value of a circuit breaker is closer to a rated current value, the overcurrent tripping of the circuit breaker is more stable and reliable, the product qualification rate is improved, the fault rate of the circuit breaker is reduced, the vibration and impact resistance of the circuit breaker is improved, and the breaking capacity value of the circuit breaker is improved, and a working method thereof.
The technical scheme is as follows: in order to solve the technical problems, the synchronous tripping linkage device of the multipolar circuit breaker comprises a comb rod, wherein comb rod shaft pivots are arranged at two ends of the comb rod, a plurality of comb fingers are arranged on the comb rod and are arranged on the same row, each comb finger comprises a comb finger bending section and a comb finger root straight section, an included angle is formed between the comb finger bending section and the comb finger root straight section, the comb finger root straight section is connected with the comb rod, and the comb rod, the comb rod shaft pivots and the comb fingers form a strip-shaped comb structure.
Further, the comb rod is in a strip shape, and the longitudinal section of the comb rod is cylindrical, elliptic and polygonal.
Further, the comb fingers are sheet-shaped.
Further, the strip-shaped comb structure is a unitary structure.
Further, the strip-shaped comb structure is a split structure and is formed by splicing or welding a plurality of split units, and each split unit comprises a comb rod, a comb rod shaft pivot and a comb finger.
Further, the strip-shaped comb-shaped structure is formed in an injection molding mode, a machining mode or a die stamping mode.
Further, the strip-shaped comb-shaped structure is made of plastic or metal.
The synchronous tripping linkage device is of a strip-shaped comb structure, the number of comb fingers is identical to the number of poles of the circuit breaker, two ends of the comb rod are in cylindrical structure, the comb rod shaft is pivoted into positioning mounting holes at two ends of a circuit breaker shell or a machine core, the comb fingers can rotate around the shaft center of the comb rod and in the positioning mounting holes at two ends, when the active tripping pole of the multi-pole circuit breaker is tripped and protected, a crank mechanism of the active tripping pole pushes a stress end of a driving plate anticlockwise through a trigger rod, the driving plate rotates anticlockwise rapidly, the working end of the driving plate presses the corresponding comb fingers of the synchronous tripping linkage device, the synchronous tripping linkage device rotates around the positioning mounting holes along the comb rod shafts at two ends, the rotating displacement and the pressing force are transmitted to other comb fingers in parallel through the comb rod of the synchronous tripping linkage device, and the other comb fingers synchronously press the middle pole iron sheet and the third pole iron sheet, so that two passive tripping poles are mechanically unlocked, and synchronous disconnection is realized.
Further, the flat direction of the comb finger bending section of the comb finger is parallel to the initial state of the armature plate actuation working end, the thickness of the comb finger is matched, the bending point is positioned outside the armature plate actuation end, and the armature plate actuation end is not extruded; the length of the comb finger is matched, so that the switching-on and switching-off motions of a crank motion mechanism of the circuit breaker are not interfered, and the switching-off speed of the crank mechanism and the contact opening distance are not influenced; the comb finger is of a bending structure and does not press the attraction end of the armature plate.
In the invention, the movement structure, the part size, the assembly mode, the movement mode, the functional principle, the shell structure and the like of the circuit breaker are all determined, the installation position and the installation hole size of the synchronous tripping linkage device are also determined, and the design scheme is as follows:
1) The design size of the matched installation and the implementation process control: the outer circle size deviation control, the coaxiality deviation control and the clearance fit tolerance control of the comb rod shaft pivot of the synchronous tripping linkage device are realized; the length of the comb rod is controlled by clearance fit tolerance at the bottom of the mounting hole after riveting the multipole circuit breaker; the length of the comb rod shaft which is pivoted into the mounting hole is controlled, so that the two ends of the linkage device are prevented from being blocked, extruded and prevented from rotating after the linkage device is arranged in the shell;
2) Initial state checking design: according to the actual structure of the product, checking and designing the length of the plane section of the root part of the comb finger, and ensuring that the suction end of the armature plate is not extruded by the comb finger of the linkage device; the direction of the bending section of the comb finger is simulated, and the bending direction is parallel to the attraction end of the armature plate, so that the comb finger of the linkage device is ensured not to press the attraction end of the armature plate;
3) The design of the instantaneous simulation motion of unlocking and tripping of the circuit breaker is as follows: the motion simulates the instantaneous state of tripping and unlocking of the circuit breaker, ensures that the crank mechanism pushes the stressed end of the transmission piece to the working end of the transmission piece anticlockwise through the trigger rod, presses the comb finger of the synchronous tripping linkage device, and enables the operating handle of the circuit breaker to return freely when the attraction end of the armature piece is close to the fixed iron core;
4) The assembly method comprises the following steps: the synchronous tripping linkage device is installed in the assembly of the multipolar circuit breaker, and a tripolar circuit breaker is taken as an example. The circuit breaker is of a laminated structure, after a movement and a shell of the circuit breaker with one pole, two poles and three poles are sequentially assembled, a synchronous tripping linkage device is assembled from top to bottom before the shell is assembled, so that a comb finger is positioned between an armature plate and a transmission plate, a shaft is pivoted into an installation hole of a bottom shell, then the circuit breaker is closed, an unlocking device is manually triggered, the function of the synchronous tripping linkage device is tested, an upper cover shell is assembled after the test is qualified, and the circuit breaker is riveted.
The beneficial effects are that: compared with the prior art, the invention has the remarkable advantages that: when any pole of the multipole circuit breaker is tripped due to the over-current fault, the other poles can synchronously cut off the fault power supply in a short time, so that the damage of electric shock to operation and maintenance personnel caused by open-phase burning loss or incomplete power failure of the protected equipment is prevented.
The invention enhances the reliability of synchronous tripping of the multipole circuit breaker, prevents the equipment from power supply phase failure and can not completely disconnect a fault power supply; the maximum limit tripping current value of the circuit breaker is closer to the rated current value, so that the overcurrent tripping of the circuit breaker is more stable and reliable, and the product qualification rate is improved; reducing the fault rate of the circuit breaker; the vibration and impact resistance of the circuit breaker is improved; and the breaking capacity value of the circuit breaker is improved.
Drawings
FIG. 1 is a schematic elevational view of the present invention;
FIG. 2 is a schematic side elevational view of the present invention;
FIG. 3 is a schematic diagram of the mounting structure of the present invention and a multipole circuit breaker;
FIG. 4 is a schematic diagram of a normal operating state of the multipole circuit breaker;
fig. 5 is a schematic diagram of a multipole circuit breaker trip instant.
Description of the embodiments
The invention is further described below with reference to the drawings and examples.
Examples
As shown in fig. 1 and 2, a synchronous tripping linkage device of a multipolar circuit breaker comprises a comb rod 1, wherein comb rod shaft pivots 2 are arranged at two ends of the comb rod 1, three comb fingers 3 are arranged on the comb rod 1 and are arranged on the same row, each comb finger 3 comprises a comb finger bending section 4 and a comb finger root straight section 5, an included angle is formed between the comb finger bending section 4 and the comb finger root straight section 5, the comb finger root straight section 5 is connected with the comb rod 1, and the comb rod 1, the comb rod shaft pivots 2 and the comb fingers 3 form a strip-shaped comb structure;
the comb pole 1 is in a strip shape, and the longitudinal section of the comb pole is cylindrical, elliptic and polygonal;
the comb fingers 3 are sheet-shaped;
the strip-shaped comb-shaped structure is an integral structure;
the strip-shaped comb-shaped structure is formed in an injection molding mode, a machining mode or a die stamping mode;
the strip-shaped comb-shaped structure is made of plastic or metal.
As shown in fig. 3, the synchronous tripping linkage device is of a strip-shaped comb structure as a whole, the comb fingers 3 are in a sheet shape, the number of the comb fingers 3 is matched with the number of poles of the circuit breaker, the two ends of the comb rod 1 are provided with comb rod shaft pivots 2 of a cylindrical structure, the comb rod shaft pivots 2 are arranged in positioning mounting holes at the two ends of the circuit breaker shell or the movement, and the comb fingers 3 can rotate around the shaft center of the comb rod 1 in the positioning mounting holes at the two ends.
As shown in fig. 4 and 5, the magnetic field intensity of the active trip pole stator core 11 magnetized by the exciting coil attracts the armature plate attracting force end 13 through the air gap attracting stroke 12, so that the armature plate rotates anticlockwise around the rotating shaft, the electromagnetic attracting force and displacement are transmitted to the armature plate working end 10 in a rotating moment manner, and the unlocking component attracting force end 9 is pushed to unlock the crank motion mechanism. At the unlocking moment, the moving contact assembly 19 is quickly separated under the action of the crank motion mechanism and the power-assisted main torsion spring, the crank mechanism trigger rod 17 pushes the stress end 18 of the transmission piece anticlockwise, so that the transmission piece rotates rapidly in the anticlockwise direction, the working end 14 of the transmission piece presses the corresponding comb finger of the synchronous tripping linkage device, the synchronous tripping linkage device rotates around the mounting hole along the comb pivot at the two ends, the rotation displacement and the pressing force are transmitted to other comb fingers through the comb rod of the synchronous tripping linkage device in parallel, the other comb fingers synchronously press the middle pole armature piece and the third pole armature piece, the two passive tripping poles are mechanically unlocked, the power supply is cut off during synchronous tripping, and the damage of the three-phase electric equipment caused by the fact that only one phase is disconnected, or the single-phase two-wire electric equipment is electrified only by disconnecting the electric shock zero line, and the operation personnel is brought to the maintenance personnel is avoided.
If the comb finger is in a bending structure, if the comb finger is not in a bending state but is in a straight strip shape, the clockwise limiting point 15 of the transmission piece reaches the limit, the transmission piece does not clockwise rotate to an uplink space, and a certain included angle is formed between the straight strip-shaped comb finger and the armature piece attraction force end 13 after being installed, so that the armature piece attraction force end 13 of the armature piece is extruded, the included angle of the attraction stroke 12 is reduced, the attraction distance is shortened, and the armature piece working end 10 is close to or contacts with the unlocking part force end 9. In this state, if the circuit breaker encounters an overload current (1.5 In-2 In) or a fault signal with a small amplitude, the armature plate actuation stress end 13 starts to accelerate under the electromagnetic attraction force of the fixed iron core 11, but has no rotating speed, at this time, the air gap is relatively large, and the magnetic field strength In the magnetic circuit is relatively small, so that the armature plate actuation stress end 13 receives small electromagnetic attraction force, but the armature plate working end 10 is close to or contacts the unlocking member stress end 9, the armature plate does not need to work on the unlocking member stress end 9 when a certain speed is not formed, the unlocking resistance is too large or the unlocking member is blocked due to static friction, and then the electromagnetic attraction force generated by the larger current can actuate the armature plate, so that the unlocking member can be unlocked by overcoming static friction force. Therefore, the maximum limit tripping current of the circuit breaker is relatively large, namely when a 10A current can normally trip, the tripping current is increased to more than 15A because the synchronous tripping linkage device presses the armature plate to reduce the actuation stroke of the armature plate. The limit action current of the circuit breaker is large, if the limit action current of the circuit breaker is light, the circuit breaker is unqualified in factory test, the qualification rate of finished products is reduced, and if the limit action current of the circuit breaker is heavy, the circuit breaker is unstable in overcurrent tripping or cannot be subjected to overcurrent tripping, and the protected equipment is aged and burnt due to long-term tolerance to overload current;
if the length of the comb finger is proper, if the design of the comb finger is too short, the trigger lever 17 of the crank mechanism pushes the stressed end 18 of the transmission piece anticlockwise to enable the transmission piece to rotate anticlockwise rapidly, the working end 14 of the transmission piece presses the comb finger of the synchronous tripping linkage device, the comb pivots at two ends of the synchronous tripping linkage device rotate around the mounting hole, and the rotation displacement and the pressing force are transmitted to other comb fingers in parallel through the comb lever of the synchronous tripping linkage device. However, as the comb finger design is too short, the armature plate attraction force-bearing end 13 cannot be contacted or approach to the fixed iron core 11, and the armature plate working end 10 pushes the unlocking component force-bearing end 9, but the unlocking component cannot be completely unlocked, the fault that the driven tripping electrode cannot trip after the active tripping electrode of the circuit breaker trips occurs; if the comb finger design is too long, after the overcurrent protection of the circuit breaker occurs, the force-bearing end 18 of the transmission piece rotates anticlockwise under the strong pushing of the trigger rod 17 of the crank mechanism, and the working end 14 of the transmission piece presses the comb finger of the synchronous tripping linkage device, so that the force-bearing end 13 of the armature piece approaches the fixed iron core 11, if the attraction stroke 12 is extruded by the comb finger of the device to become 0 value, the pushing stroke of the trigger rod 17 of the crank mechanism is still redundant, and at the moment, the circuit breaker handle, the crank mechanism and the like cannot be rotated and reset to be in a clamping state. The breaking distance 20 between the fixed contact 21 and the movable contact assembly 19 is reduced due to the fact that the crank movement mechanism cannot be reset completely, the interfered opening distance is reduced, the rapid separation function is lost, fault current cannot be broken rapidly, and the contact pair is burnt or burst due to high temperature of arc excitation due to long-time arcing;
the bending angle, the bending position and the thickness of the comb finger are proper, if deviation exists, the comb finger is interfered to squeeze the armature plate attraction force end 13, the armature plate working end 10 is close to or contacts the unlocking part force end 9, the armature plate working end 10 is acted by vibration centrifugal force, the unlocking part force end 9 is beaten by the rotating swing arm structure at high frequency, the unlocking release mechanism is triggered to unlock and release, and the circuit breaker cannot normally operate, so that the vibration resistance of the circuit breaker is poor or the vibration resistance is lost, and safety accidents are caused.
The present invention provides a method and a thought, and a method for implementing the technical scheme are numerous, the above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made, and these improvements and modifications should also be regarded as protection scope of the present invention, and each component that is not explicitly described in the present embodiment can be implemented by the prior art.
Claims (9)
1. The utility model provides a multipole circuit breaker synchronous tripping linkage device which characterized in that: the comb comprises a comb rod (1), wherein comb rod shaft pivots (2) are arranged at two ends of the comb rod (1), a plurality of comb fingers (3) are arranged on the comb rod (1) and are arranged on the same row, each comb finger (3) comprises a comb finger bending section (4) and a comb finger root straight section (5), an included angle is formed between each comb finger bending section (4) and each comb finger root straight section (5), each comb finger root straight section (5) is connected with the comb rod (1), and each comb rod (1), each comb rod shaft pivot (2) and each comb finger (3) form a strip-shaped comb structure.
2. The multipole circuit breaker synchronous trip linkage of claim 1 wherein: the comb rod (1) is in a strip shape, and the longitudinal section of the comb rod is cylindrical, elliptic and polygonal.
3. The multipole circuit breaker synchronous trip linkage of claim 1 wherein: the comb fingers (3) are sheet-shaped.
4. The multipole circuit breaker synchronous trip linkage of claim 1 wherein: the strip-shaped comb-shaped structure is an integral structure.
5. The multipole circuit breaker synchronous trip linkage of claim 1 wherein: the strip-shaped comb structure is a split structure and is formed by splicing or welding a plurality of split units, and each split unit comprises a comb rod, a comb rod shaft pivot and a comb finger.
6. The multipole circuit breaker synchronous trip linkage of claim 1 wherein: the strip-shaped comb-shaped structure is formed in an injection molding mode, a machining mode or a die stamping mode.
7. The multipole circuit breaker synchronous trip linkage of claim 1 wherein: the strip-shaped comb-shaped structure is made of plastic or metal.
8. A method of operating a synchronous trip linkage of a multipole circuit breaker according to claim 1, characterized by: the synchronous tripping linkage device is of a strip-shaped comb structure as a whole, the comb fingers are of a sheet shape, the number of the comb fingers is matched with the number of poles of the circuit breaker, the two ends of the comb rod are of cylindrical structure, the comb rod is pivoted into positioning mounting holes at the two ends of a shell or a movement of the circuit breaker, the comb fingers can rotate around the shaft center of the comb rod and in the positioning mounting holes at the two ends, when the active tripping pole of the multipolar circuit breaker trips for protection, a crank mechanism of the active tripping pole pushes a stressed end of a transmission piece through a trigger rod to enable the transmission piece to rotate anticlockwise rapidly, the working end of the transmission piece presses the corresponding comb finger of the synchronous tripping linkage device, the synchronous tripping linkage device rotates around the positioning mounting holes along the shaft of the two ends of the comb rod, the rotary displacement and the pressing force are transmitted to the other comb rods of the synchronous tripping linkage device in parallel, and the other fingers synchronously press the middle pole armature piece and the third pole armature piece, so that the two passive tripping poles are mechanically unlocked, and synchronous disconnection is realized.
9. The method of operating a synchronous trip linkage of a multipole circuit breaker of claim 8, wherein: the flat direction of the bending section of the comb finger is parallel to the initial state of the actuation working end of the armature plate, the thickness of the comb finger is matched, the bending point is positioned outside the actuation end of the armature plate, and the actuation end of the armature plate is not extruded; the length of the comb finger is matched, so that the switching-on and switching-off motions of a crank motion mechanism of the circuit breaker are not interfered, and the switching-off speed of the crank mechanism and the contact opening distance are not influenced; the comb finger is of a bending structure and does not press the attraction end of the armature plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310057802.5A CN116013743A (en) | 2023-01-19 | 2023-01-19 | Synchronous tripping linkage device of multipole circuit breaker and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310057802.5A CN116013743A (en) | 2023-01-19 | 2023-01-19 | Synchronous tripping linkage device of multipole circuit breaker and working method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116013743A true CN116013743A (en) | 2023-04-25 |
Family
ID=86037126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310057802.5A Withdrawn CN116013743A (en) | 2023-01-19 | 2023-01-19 | Synchronous tripping linkage device of multipole circuit breaker and working method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116013743A (en) |
-
2023
- 2023-01-19 CN CN202310057802.5A patent/CN116013743A/en not_active Withdrawn
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101971281B (en) | Multi-pole armature interlock for circuit breakers | |
| CN109950103B (en) | Circuit breaker operating mechanism and circuit breaker | |
| AU3315799A (en) | Electrical breaking device comprising a differential trip device and a circuit breaker comprising such a device | |
| CN100555507C (en) | Miniature circuit breaker | |
| CN107275163B (en) | Circuit breaker and power distribution system | |
| EP3291273B1 (en) | Operating mechanism of circuit breaker | |
| ITMI20012327A1 (en) | LOW VOLTAGE SWITCH | |
| EP3291274B1 (en) | Fusion welding isolation mechanism for operating mechanism of circuit breaker | |
| EP3703097B1 (en) | Clapper-type electromagnetic release for miniature circuit breaker | |
| CN107342178B (en) | High-breaking miniature circuit breaker | |
| CN219917049U (en) | Delay release and circuit breaker | |
| CN101170031B (en) | Quick break low voltage circuit breaker | |
| CN117116717A (en) | Circuit breaker with leakage protection | |
| CN116013743A (en) | Synchronous tripping linkage device of multipole circuit breaker and working method thereof | |
| AU2019386913B2 (en) | Circuit breaker | |
| CN106128878A (en) | Intelligent breaker | |
| CN209880525U (en) | Miniature circuit breaker with ultrahigh short circuit breaking capacity | |
| KR200190795Y1 (en) | Limiting current device of a circuit breaker | |
| CN218384989U (en) | Novel modularization semi-axis is threaded off device | |
| CN214043578U (en) | Composite circuit breaker with thermal tripping and electromagnetic tripping functions | |
| CN201054339Y (en) | Quick close-open low-voltage circuit breaker | |
| JP2000003661A (en) | Earth leakage breaker | |
| CN211045359U (en) | Automatic time-delay circuit breaker | |
| CN220963213U (en) | Multi-section contact connection breaker | |
| CN108878226B (en) | Circuit breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20230425 |
|
| WW01 | Invention patent application withdrawn after publication |