CN213716827U - Quick breaking device based on short-circuit current induction field intensity - Google Patents
Quick breaking device based on short-circuit current induction field intensity Download PDFInfo
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- CN213716827U CN213716827U CN202120018134.1U CN202120018134U CN213716827U CN 213716827 U CN213716827 U CN 213716827U CN 202120018134 U CN202120018134 U CN 202120018134U CN 213716827 U CN213716827 U CN 213716827U
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- 239000004020 conductor Substances 0.000 claims abstract description 78
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- 230000005611 electricity Effects 0.000 claims description 2
- 230000009471 action Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000007246 mechanism Effects 0.000 description 5
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
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- 230000009286 beneficial effect Effects 0.000 description 2
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- 230000005426 magnetic field effect Effects 0.000 description 2
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Abstract
The utility model relates to a quick breaking device based on short circuit current induction field intensity, which belongs to the technical field of power system equipment and comprises a fixed electric conductor, a movable electric conductor, an operation connecting rod, an arc extinguish chamber and a power supply, wherein the fixed electric conductor is electrically connected with the power supply, and a loop equivalent resistance is arranged between the fixed electric conductor and the power supply; the movable conductor is arranged in the fixed conductor and close to the end part; one end of the operating connecting rod is detachably connected with the movable conductor, the other end of the operating connecting rod is fixedly connected with a switch moving contact arranged in the arc extinguishing chamber, and an insulator is arranged in the middle of the operating connecting rod and divides the operating connecting rod into two sections; and a switch static contact matched with the switch moving contact is also arranged in the arc extinguishing chamber and is electrically connected with a power supply. The utility model discloses the structure is retrencied, low in production cost and divide the disconnected action sensitive, divide disconnected reliably.
Description
Technical Field
The utility model relates to a quick disjunction device based on short-circuit current induction field intensity belongs to power system equipment technical field.
Background
The protection control of fault current is the most important guarantee for reliable operation of an electric power system and an automatic control system, the protection system needs to drive an electrical appliance contact to quickly break a circuit, quickly connect a current limiting circuit or quickly switch a power supply bus circuit by means of a quick operating mechanism, and the current way for the fault current is to clear the fault current by matching a protection device with a circuit breaker, namely, after the protection device obtains short-circuit fault information and processes the short-circuit fault information, the type of the short-circuit fault is judged, and then a corresponding circuit breaker is started to perform tripping operation, so that the fault is eliminated. The method can be completed only by the close and accurate matching of the protection device and the circuit breaker; at present, a capacitive energy storage discharge type electromagnetic eddy current repulsion mechanism is used as a quick operation mechanism of a switch, but the mode needs an additional power supply to provide required energy, needs a matched control system, and has a series of problems of reliability, high cost, complex structure and the like of protection.
In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.
SUMMERY OF THE UTILITY MODEL
In order to overcome shortcomings such as current fault current protection control structure cost height, structure complicacy, the utility model designs a quick disjunction device based on short-circuit current induction field intensity, its structure is retrencied, low in production cost and the disjunction action is sensitive, the disjunction is reliable.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a quick breaking device based on short-circuit current induction field intensity comprises a fixed conductor, a movable conductor, an operation connecting rod, an arc extinguish chamber and a power supply, wherein the fixed conductor is electrically connected with the power supply, and a loop equivalent resistor is arranged between the fixed conductor and the power supply; the movable conductor is arranged in the fixed conductor and close to the end part; one end of the operating connecting rod is detachably connected with the movable conductor, the other end of the operating connecting rod is fixedly connected with a switch moving contact arranged in the arc extinguishing chamber, and an insulator is arranged in the middle of the operating connecting rod and divides the operating connecting rod into two sections; and a switch static contact matched with the switch moving contact is also arranged in the arc extinguishing chamber and is electrically connected with a power supply.
Furthermore, an operation connecting rod between the switch moving contact and the insulator is electrically connected with the fixed conductor, and a current limiting resistor is arranged between the operation connecting rod and a power supply.
Further, the fixed conductor comprises a cylindrical base and a fixed coil for conducting electricity, and the fixed coil is fixedly wound on the cylindrical base.
Further, the operating link is screwed with the movable conductor.
Further, the cross-sectional area of the movable conductor is smaller than the cross-sectional area of the cylindrical base.
Compared with the prior art the utility model discloses there are following characteristics and beneficial effect: the utility model relies on the action of the quick breaking mechanism driven by the self short-circuit current energy of the main loop, saves energy, reduces redundant structures, has simple overall structure, is not influenced by impact force in the high-speed action process, is beneficial to effective arc extinguishing, and prolongs the service life; in the environment of needing repeated opening and closing operations, the complexity of the mechanism structure and the production cost are reduced; the quick breaking device based on the short-circuit current induction field intensity is sensitive in action and reliable in breaking.
Drawings
FIG. 1 is a schematic connection diagram of the first embodiment;
FIG. 2 is a schematic connection diagram of the second embodiment.
Wherein the reference numerals are: 1. fixing the conductor; 2. a movable conductor; 3. operating the connecting rod; 4. a cylindrical base; 5. an insulator; 6. a switch moving contact; 7. a switch static contact; 8. an arc extinguishing chamber; 9. a loop equivalent resistance; 10. a current limiting resistor; 11. a power source.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Example one
As shown in fig. 1, the fast disconnecting device based on the short-circuit current induction field strength of the present embodiment includes a fixed conductor 1, a movable conductor 2, an operating link 3, an arc extinguish chamber 8 and a power supply 11, wherein the fixed conductor 1 is electrically connected to the power supply 11, and a loop equivalent resistor 9 is arranged between the fixed conductor 1 and the power supply 11; the movable conductor 2 is arranged in the fixed conductor 1 at a position close to the right end; one end of the operating connecting rod 3 is detachably connected with the movable conductor 2, the other end of the operating connecting rod is fixedly connected with a switch moving contact 6 arranged in an arc extinguish chamber 8, an insulator 5 is also arranged in the middle of the operating connecting rod 3, and the operating connecting rod 3 is divided into two sections by the insulator 5; and a switch static contact 7 matched with the switch moving contact 6 is also arranged in the arc extinguish chamber 8, and the switch static contact 7 is electrically connected with a power supply 11.
In particular, the movable electrical conductor 2 is constituted by a coil or a copper tube closed end to end.
Further, the fixed conductor 1 includes a cylindrical base 4 and a fixed coil for conduction, and the fixed coil is fixedly wound on the cylindrical base 4; the fixed coil is made of copper wires with an enamel-insulated coating, and adjacent wires have an insulating effect; one end of a fixed coil on the fixed conductor 1 is connected with a power supply 11 through a loop equivalent resistor 9, and the other end is connected with an operation connecting rod 3 between the switch moving contact 6 and the insulator 5.
Further, the operating link 3 is screwed with the movable conductor 2.
Further, the sectional area of the movable conductor 2 is smaller than that of the cylindrical base 4.
The working principle of the first embodiment is as follows: as shown in fig. 1, in a quick disconnecting device based on short-circuit current induction field intensity, one end of an operating link 3 is connected with a movable conductor 2, the other end is connected with a switch moving contact 6, the middle is insulated and isolated through an insulator 5, and the movable conductor 2 is positioned at the right side of the center inside a fixed conductor 1; when a short-circuit fault occurs at a certain point of an electric main loop of the power system, short-circuit fault current flows through the fixed electric conductor 1, when the movable electric conductor 2 is located at a position close to the right side of the center inside the fixed electric conductor 1, the movable electric conductor 2 can induce loop current due to the change of magnetic flux under the action of the short-circuit current of the fixed electric conductor 1, and according to the lenz law, the magnetic field effect of induced current in the movable electric conductor 2 always counteracts the effect of an original magnetic field causing the induced current, so that the movable electric conductor 2 has the tendency of moving towards the right side of the fixed electric conductor 1, the operation connecting rod 3 is further driven to move towards the right side, the switch moving contact 6 is driven to realize rapid opening operation, the electric main loop.
Example two
As shown in fig. 2, the fast disconnecting device based on the short-circuit current induction field strength of the present embodiment includes a fixed conductor 1, a movable conductor 2, an operating link 3, an arc extinguish chamber 8 and a power supply 11, wherein the fixed conductor 1 is electrically connected to the power supply 11, and a loop equivalent resistor 9 is arranged between the fixed conductor 1 and the power supply 11; the movable conductor 2 is arranged in the fixed conductor 1 at a position close to the end part; one end of the operating connecting rod 3 is detachably connected with the movable conductor 2, the other end of the operating connecting rod is fixedly connected with a switch moving contact 6 arranged in an arc extinguish chamber 8, an insulator 5 is also arranged in the middle of the operating connecting rod 3, and the operating connecting rod 3 is divided into two sections by the insulator 5; and a switch static contact 7 matched with the switch moving contact 6 is also arranged in the arc extinguish chamber 8, and the switch static contact 7 is electrically connected with a power supply 11.
In particular, the movable electrical conductor 2 is constituted by a coil or a copper tube closed end to end.
Furthermore, an operation connecting rod 3 between the switch moving contact 6 and the insulator 5 is electrically connected with the fixed conductor 1, and a current limiting resistor 10 is arranged between the fixed conductor and a power supply 11.
Further, the fixed conductor 1 includes a cylindrical base 4 and a fixed coil for conduction, and the fixed coil is fixedly wound on the cylindrical base 4.
Further, the operating link 3 is screwed with the movable conductor 2.
Further, the sectional area of the movable conductor 2 is smaller than that of the cylindrical base 4.
Working principle of the second embodiment: as shown in fig. 2, in a quick breaking device based on short-circuit current induction field intensity, one end of an operating connecting rod 3 is connected with a movable conductor 2, the other end is connected with a switch moving contact 6, and the middle is insulated and isolated through an insulator 5; wherein, the movable conductor 2 is positioned at the right side of the center of the fixed conductor 1; the switch branch in the arc extinguish chamber 8 in the main loop is connected with a loop of the current limiting resistor 10 in parallel, and the current of the main loop normally flows from the switch branch in the arc extinguish chamber 8 because the resistance value of the current limiting resistor 10 is very large and the flowing current value is very small and can be ignored during normal work; when a short-circuit fault occurs at a certain point of an electric main loop of the power system, short-circuit fault current flows through the fixed electric conductor 1, when the movable electric conductor 2 is positioned at the position close to the right side of the center inside the fixed electric conductor 1, the movable electric conductor 2 can induce loop current due to the change of magnetic flux under the action of the short-circuit current of the fixed electric conductor 1, and according to the Lenz's law, the magnetic field effect of induced current in the movable electric conductor 2 always counteracts the effect of an original magnetic field causing the induced current, so that the movable electric conductor 2 has the tendency of moving towards the right side of the fixed electric conductor 1, the operation connecting rod 3 is further driven to move towards the right side, the switch moving contact 6 is driven to realize rapid opening operation, the electric; after the switch branch in the arc extinguish chamber 8 is opened, the switch branch is disconnected and the branch where the current limiting resistor 10 is located bears the current circulation of the main loop, and because the resistance value of the current limiting resistor 10 is very large, the current limiting resistor has a good effect of limiting the short-circuit current of the main loop, and can prevent the short-circuit current from damaging the stability of the power system.
It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Claims (5)
1. The utility model provides a quick disjunction device based on short-circuit current induction field intensity which characterized in that: the arc extinguishing device comprises a fixed conductor (1), a movable conductor (2), an operation connecting rod (3), an arc extinguishing chamber (8) and a power supply (11), wherein the fixed conductor (1) is electrically connected with the power supply (11), and a loop equivalent resistor (9) is arranged between the fixed conductor (1) and the power supply (11); the movable conductor (2) is arranged in the fixed conductor (1) at a position close to the end part; one end of the operating connecting rod (3) is detachably connected with the movable conductor (2), the other end of the operating connecting rod is fixedly connected with a switch moving contact (6) arranged in the arc extinguish chamber (8), an insulator (5) is further arranged in the middle of the operating connecting rod (3), and the operating connecting rod (3) is divided into two sections by the insulator (5); a switch static contact (7) matched with the switch moving contact (6) is also arranged in the arc extinguish chamber (8), and the switch static contact (7) is electrically connected with a power supply (11).
2. A rapid disconnection device according to claim 1, wherein: an operation connecting rod (3) between the switch moving contact (6) and the insulator (5) is electrically connected with the fixed conductor (1), and a current-limiting resistor (10) is arranged between the operation connecting rod and a power supply (11).
3. A rapid disconnection device according to claim 1, wherein: the fixed electric conductor (1) comprises a cylindrical base (4) and a fixed coil for conducting electricity, and the fixed coil is fixedly wound on the cylindrical base (4).
4. A rapid disconnection device according to claim 1, wherein: the operating link (3) is in threaded connection with the movable conductor (2).
5. A rapid disconnection device according to claim 1, wherein: the cross-sectional area of the movable conductor (2) is smaller than the cross-sectional area of the cylindrical base (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120018134.1U CN213716827U (en) | 2021-01-05 | 2021-01-05 | Quick breaking device based on short-circuit current induction field intensity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120018134.1U CN213716827U (en) | 2021-01-05 | 2021-01-05 | Quick breaking device based on short-circuit current induction field intensity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213716827U true CN213716827U (en) | 2021-07-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120018134.1U Active CN213716827U (en) | 2021-01-05 | 2021-01-05 | Quick breaking device based on short-circuit current induction field intensity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213716827U (en) |
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2021
- 2021-01-05 CN CN202120018134.1U patent/CN213716827U/en active Active
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