CN113053694A - Vacuum circuit breaker main shaft speed measurement modularization transmission - Google Patents
Vacuum circuit breaker main shaft speed measurement modularization transmission Download PDFInfo
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- CN113053694A CN113053694A CN202110249292.2A CN202110249292A CN113053694A CN 113053694 A CN113053694 A CN 113053694A CN 202110249292 A CN202110249292 A CN 202110249292A CN 113053694 A CN113053694 A CN 113053694A
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- gear box
- circuit breaker
- shaft
- main shaft
- positioning sleeve
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
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Abstract
The invention provides a modular transmission device for measuring speed of a main shaft of a vacuum circuit breaker, which comprises a main shaft transition joint, a first gear box, a second gear box, a third gear box body and an angular velocity sensor, wherein a plurality of bolts are arranged on the outer side of the main shaft transition joint; one end of the first gearbox body is connected to the second gearbox body through a first telescopic adjusting shaft in a transmission mode. According to the invention, the compatibility of the old circuit breaker to the size of the angular velocity sensor is improved due to the movable design of the parts, the installation flexibility of the angular velocity sensor is improved due to the design of the telescopic transmission shaft, and the sensors with larger sizes can be installed in the circuit breaker due to the introduction of the telescopic structure.
Description
Technical Field
The invention relates to the field of vacuum circuit breakers, in particular to a modular transmission device for speed measurement of a main shaft of a vacuum circuit breaker.
Background
High voltage circuit breakers are the most important switching devices of electrical power systems. It is responsible for the control and protection functions, i.e. it is used to reliably switch in or switch out the corresponding line or electrical equipment, depending on the operational requirements of the power grid. The circuit breaker has a complex mechanical structure, and the reliability of the circuit breaker can be reduced due to frequent actions and unscientific overhaul, so that hidden dangers and losses are brought. Circuit breaker mechanical faults are one of the most common faults in electrical power systems. Some circuit breakers, such as capacitor switching circuit breakers in a 10kV compensation cabinet, have more action times and higher fault probability. Therefore, intelligent circuit breakers and circuit breaker online monitoring test platform development are actively carried out at home and abroad, various sensors are adopted to acquire state information of all aspects of mechanical actions of the circuit breakers, and states of the circuit breakers are comprehensively and accurately mastered. One of the most important monitoring items is monitoring of a moving contact displacement signal. By monitoring the displacement signal of the moving contact, the states of the contact stroke, the just opening (closing) speed and the like can be mastered. By analyzing the travel-time curve, the fault trend can be predicted and the fault type can be judged.
But because most circuit breaker manufacturers have considered the demand of off-line test circuit breaker operating speed when designing the production circuit breaker, leave the trompil at the box curb plate for angular velocity sensor can install in the box outside, this kind of mounting means leads to carrying out this project test after vacuum circuit breaker takes out the cubical switchboard, and angular velocity sensor volume has the size, and still need through connecting transition joint installation when linking to each other with the main shaft. The invention provides a vacuum circuit breaker main shaft speed measurement modular transmission device based on the problems that the structure of a circuit breaker is compact, the distance between a main shaft and a side baffle is very short, the space is very small, and a sensor and a transition joint cannot be placed in a box body.
Disclosure of Invention
The invention aims to provide a modular transmission device for speed measurement of a main shaft of a vacuum circuit breaker, which aims to solve the technical problem.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a modular transmission that tests speed of vacuum circuit breaker main shaft, includes main shaft transition joint, first gear box, second gear box, third gear box and angular velocity sensor, its characterized in that: a plurality of bolts are arranged on the outer side of the main shaft transition joint, one side of the main shaft transition joint is in transmission connection with a main shaft of the circuit breaker, and the other end of the main shaft transition joint is in transmission connection with a first gear box through an output shaft; one end of the first gearbox body is connected to the second gearbox body through a first telescopic adjusting shaft in a transmission mode, the first gearbox body is located on the rear side of the second gearbox body, one end of the second gearbox body is connected to the third gearbox body through a second telescopic adjusting shaft in a transmission mode, one side of the third gearbox body is connected with the coupler in a transmission mode through a third telescopic adjusting shaft, and the bottom of the coupler is connected with the angular speed sensor in a transmission mode.
Preferably, the structure of the flexible regulating spindle of first flexible regulating spindle, second and the flexible regulating spindle of third is the same, first flexible regulating spindle includes telescopic sleeve and central siphon structure, and telescopic sleeve and central siphon are both spacing through the slip spline groove, and wherein the spacing groove has been seted up in the telescopic sleeve outside, is provided with first spacing screw extrusion central siphon on the spacing groove, be provided with second spacing screw and third spacing screw on the flexible regulating spindle of second and the flexible regulating spindle of third respectively and extrude corresponding axle sleeve.
Preferably, one end of the second telescopic adjusting shaft and the inside of the third gear box are connected with a first spiral gear, the top of the third telescopic adjusting shaft and the inside of the third gear box are connected with a second spiral gear, and the first spiral gear and the second spiral gear are in meshed connection.
Preferably, one end of the first telescopic adjusting shaft is in transmission connection with the output shaft on one side of the main shaft transition joint through two spiral-tooth gears, and the two spiral-tooth gears are located inside the first gear box body.
Preferably, the other end of the first telescopic adjusting shaft is in transmission connection with the other end of the second telescopic adjusting shaft through two spiral-tooth gears, and the two spiral-tooth gears are located inside the second gear box.
Preferably, a first positioning sleeve and a first bearing are arranged at the connecting position between the third telescopic adjusting shaft and the third gear box, wherein the first bearing is arranged on the outer side of the first positioning sleeve, the first bearing is arranged on the third gear box, and the first positioning sleeve is sleeved on the outer side of the third telescopic adjusting shaft.
Preferably, a second positioning sleeve is arranged at a connecting position between the first helical gear and the third gear box, and a bearing is arranged outside the second positioning sleeve.
Preferably, a third positioning sleeve, a fourth positioning sleeve and a second bearing are arranged at the connecting position between the second telescopic adjusting shaft and the third gear box, wherein the second bearings are arranged on the outer sides of the third positioning sleeve and the fourth positioning sleeve, and the third positioning sleeve and the fourth positioning sleeve are sleeved on the outer side of the second telescopic adjusting shaft.
Compared with the prior art, the modular transmission device for the speed measurement of the main shaft of the vacuum circuit breaker has the following beneficial effects:
the invention provides a vacuum circuit breaker main shaft speed measurement modularization transmission device, firstly, the movable design of components improves the compatibility of old circuit breakers to the size of an angular velocity sensor, the design of a telescopic transmission shaft increases the installation flexibility of the angular velocity sensor, and the introduction of a telescopic structure enables sensors with larger size to be installed in the circuit breaker, the invention is very friendly to the upgrade and reconstruction of the traditional circuit breaker, has practical value and can bring economic benefit, secondly, the free combination configuration of the transmission device can be realized through the modularization design of the components, 180-degree reversing can be realized through two gear boxes and two transmission shafts, the sensors are installed on a side clapboard of the circuit breaker, the space reversing can be realized through three gear boxes and three transmission shafts, the sensors are installed on a bottom plate or a top plate of a box body of the circuit breaker, the installation is more flexible.
Drawings
FIG. 1 is a schematic structural diagram of a modular transmission device for measuring speed of a main shaft of a vacuum circuit breaker according to the present invention;
FIG. 2 is a top view of a modular transmission for measuring speed of a main shaft of a vacuum circuit breaker according to the present invention;
FIG. 3 is a schematic view of a first telescoping adjustment shaft according to the present invention;
FIG. 4 is a cross-sectional view taken at C-C of FIG. 3 in accordance with the present invention;
FIG. 5 is a cross-sectional view taken along line D-D of FIG. 3 in accordance with the present invention;
FIG. 6 is a schematic view showing the internal structure of a third gear case according to the present invention;
FIG. 7 is a schematic view of a third gear case according to the present invention;
fig. 8 is a schematic perspective view of a vacuum circuit breaker spindle speed measurement modular transmission device according to the present invention;
reference numerals: 1. a circuit breaker main shaft; 2. a main shaft transition joint; 3. a bolt; 4. an output shaft; 5. a first gear case; 6. a first telescopic adjustment shaft; 7. a second gear box; 8. a first limit screw; 9. a second telescopic adjustment shaft; 10. a second limit screw; 11. a first helical-toothed gear; 12. a spline groove; 13. a third telescopic adjusting shaft; 14. a third limit screw; 15. a coupling; 16. an angular velocity sensor; 17. a second helical gear; 18. a third gear case; 19. a first positioning sleeve; 20. a first bearing; 21. a second positioning sleeve; 22. a fourth positioning sleeve; 23. a third positioning sleeve; 24. a second bearing.
Detailed Description
In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easily understood, the invention is further described below with reference to the specific embodiments and the attached drawings, but the following embodiments are only the preferred embodiments of the invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6 and fig. 7, fig. 1 is a schematic structural diagram of a modular transmission device for measuring speed of a main shaft of a vacuum circuit breaker according to an embodiment of the present invention; FIG. 2 is a top view of a modular transmission for measuring speed of a main shaft of a vacuum circuit breaker according to the present invention; FIG. 3 is a schematic view of a first telescoping adjustment shaft according to the present invention; FIG. 4 is a cross-sectional view taken at C-C of FIG. 3 in accordance with the present invention; FIG. 5 is a cross-sectional view taken along line D-D of FIG. 3 in accordance with the present invention; FIG. 6 is a schematic view showing the internal structure of a third gear case according to the present invention; FIG. 7 is a schematic view of a third gear case according to the present invention; fig. 8 is a schematic perspective view of a vacuum circuit breaker spindle speed measurement modular transmission device according to the present invention.
In a specific implementation process, as shown in fig. 1-8, a vacuum circuit breaker spindle speed measurement modular transmission device comprises a spindle transition joint 2, a first gear box 5, a second gear box 7, a third gear box 18 and an angular velocity sensor 16, wherein a plurality of bolts 3 are arranged on the outer side of the spindle transition joint 2, one side of the spindle transition joint 2 is in transmission connection with a circuit breaker spindle 1, and the other end of the spindle transition joint 2 is in transmission connection with the first gear box 5 through an output shaft 4; one end of the first gear box body 5 is connected to the second gear box body 7 through the first telescopic adjusting shaft 6 in a transmission mode, the first gear box body 5 is located on the rear side of the second gear box body 7, one end of the second gear box body 7 is connected to the third gear box body 18 through the second telescopic adjusting shaft 9 in a transmission mode, one side of the third gear box body 18 is connected with the coupler 15 through the third telescopic adjusting shaft 13 in a transmission mode, and the bottom of the coupler 15 is connected with the angular speed sensor 16 in a transmission mode.
In the specific implementation process, as shown in fig. 1 to 5, the first telescopic adjusting shaft 6, the second telescopic adjusting shaft 9 and the third telescopic adjusting shaft 13 have the same structure, the first telescopic adjusting shaft 6 includes a telescopic sleeve and a shaft tube structure, and the telescopic sleeve and the shaft tube are both limited by a sliding spline groove 12, wherein a limiting groove is formed in the outer side of the telescopic sleeve, a first limiting screw 8 is arranged on the limiting groove to extrude the shaft tube, and a second limiting screw 10 and a third limiting screw 14 are respectively arranged on the second telescopic adjusting shaft 9 and the third telescopic adjusting shaft 13 to extrude the corresponding shaft sleeves.
In the specific implementation process, as shown in fig. 1 to 6, a first helical gear 11 is connected to one end of the second telescopic adjusting shaft 9 and located inside the third gear box 18, a second helical gear 17 is connected to the top of the third telescopic adjusting shaft 13 and located inside the third gear box 18, and the first helical gear 11 is in meshed connection with the second helical gear 17.
In the specific implementation process, as shown in fig. 1-2, one end of the first telescopic adjusting shaft 6 is in transmission connection with the output shaft 4 on one side of the main shaft transition joint 2 through two helical gear wheels, and the two helical gear wheels are located inside the first gear box body 5.
In the specific implementation process, as shown in fig. 1-2, the other end of the first telescopic adjusting shaft 6 is in transmission connection with the other end of the second telescopic adjusting shaft 9 through two helical gear wheels, and the two helical gear wheels are located inside the second gear box 7.
In a specific implementation process, as shown in fig. 1 to 6, a first locating sleeve 19 and a first bearing 20 are disposed at a connection position between the third telescopic adjusting shaft 13 and the third gear case 18, wherein the first bearing 20 is disposed on an outer side of the first locating sleeve 19, the first bearing 20 is disposed on the third gear case 18, and the first locating sleeve 19 is sleeved on an outer side of the third telescopic adjusting shaft 13.
In the specific implementation process, as shown in fig. 6 to 7, a second positioning sleeve 21 is disposed at a connection position between the first helical gear 11 and the third gear case 18, wherein a bearing is disposed outside the second positioning sleeve 21.
In a specific implementation process, as shown in fig. 1 and 6-7, a third positioning sleeve 23, a fourth positioning sleeve 22 and a second bearing 24 are arranged at a connection position between the second telescopic adjusting shaft 9 and the third gear case 18, wherein the second bearings 24 are arranged on outer sides of the third positioning sleeve 23 and the fourth positioning sleeve 22, and the third positioning sleeve 23 and the fourth positioning sleeve 22 are sleeved on the outer side of the second telescopic adjusting shaft 9.
The working principle of the invention is as follows:
the main shaft transition joint 2 is tightly installed on the main shaft 1 of the circuit breaker through three high-strength bolts 3, and the angular speed output end axes of the main shaft 1 of the circuit breaker and the main shaft transition joint 2 are ensured to be on the same straight line by fine adjustment of the three bolts 3 and the triangular positioning principle;
an output shaft 4 of a main shaft transition joint 2 is inserted into a first gear box 5, wherein the main shaft transition joint 2 and the output shaft 4 are integrally arranged, the three are fixed through two positioning sleeves, the output shaft 4 is in reversing transmission connection with a first telescopic adjusting shaft 6 through two spiral toothed gears, so that the first telescopic adjusting shaft 6 is driven to rotate, the first telescopic adjusting shaft 6 is also in reversing transmission connection with a second telescopic adjusting shaft 9 through two spiral toothed gears in a second gear box 7 between the first telescopic adjusting shaft 6 and the second telescopic adjusting shaft 9, so that the second telescopic adjusting shaft 9 is driven to rotate, the reliable transmission of angular speed is ensured, and then the second telescopic adjusting shaft 9 drives a third telescopic adjusting shaft 13 to rotate;
because the first helical gear 11 and the second helical gear 17 are meshed with each other in the third gear box 18 and are fully lubricated, the second telescopic adjusting shaft 9 is further realized to drive the third telescopic adjusting shaft 13 to rotate, wherein the first helical gear 11 and the second telescopic adjusting shaft 9 are integrally connected, the second helical gear 17 and the third telescopic adjusting shaft 13 are integrally connected, angular velocity is stably transmitted in a constant-speed reversing manner, the second telescopic adjusting shaft 9 rotates to drive the two first helical gears 11 and the second helical gear 17 to perform reversing transmission, and the third telescopic adjusting shaft 13 transmits power out of the third gear box 18;
the other end of the third telescopic adjusting shaft 13 is connected with a coupler 15 to realize the transmission of angular velocity, and finally, the angular velocity is transmitted to an angular velocity sensor 16; in the process, the lengths of the first telescopic adjusting shaft 6, the second telescopic adjusting shaft 9 and the third telescopic adjusting shaft 13 can be flexibly adjusted according to requirements, the lengths of the first telescopic adjusting shaft 6, the second telescopic adjusting shaft 9 and the third telescopic adjusting shaft 13 are fixed by screwing corresponding limiting screws after the adjustment is finished, the friction force of corresponding rotating shafts can be reduced due to the arrangement of a plurality of bearings, and the third telescopic adjusting shaft 13 and the angular velocity sensor 16 can be connected by adopting a common coupler 15;
the rotation of the main shaft 1 of the circuit breaker is transmitted to the angular velocity sensor 16 through the main shaft transition joint 2, the first gear box 5, the second gear box 7 and the third gear box 18 in equal ratio.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides a modular transmission that tests speed of vacuum circuit breaker main shaft, includes main shaft transition joint (2), first gear box (5), second gear box (7), third gear box body (18) and angular velocity sensor (16), its characterized in that: a plurality of bolts (3) are arranged on the outer side of the main shaft transition joint (2), one side of the main shaft transition joint (2) is in transmission connection with a breaker main shaft (1), and the other end of the main shaft transition joint (2) is in transmission connection with a first gear box (5) through an output shaft (4);
the one end of first gearbox body (5) is connected to second gearbox (7) through first flexible regulating shaft (6) transmission, and first gearbox body (5) are located the rear side of second gearbox (7), the one end of second gearbox body (7) is connected to third gearbox body (18) through second flexible regulating shaft (9) transmission, and one side of third gearbox body (18) is connected with shaft coupling (15) transmission through third flexible regulating shaft (13) again, angular velocity sensor (16) is connected in the bottom transmission of shaft coupling (15).
2. The modular transmission device for vacuum circuit breaker spindle speed measurement according to claim 1, characterized in that: the structure of first flexible regulating spindle (6), the flexible regulating spindle of second (9) and the flexible regulating spindle of third (13) is the same, first flexible regulating spindle (6) includes telescopic sleeve and central siphon structure, and both are spacing through slip spline groove (12) telescopic sleeve and central siphon, and wherein the spacing groove has been seted up in the telescopic sleeve outside, is provided with first limit screw (8) extrusion central siphon on the spacing groove, be provided with second limit screw (10) and third limit screw (14) respectively on the flexible regulating spindle of second (9) and the flexible regulating spindle of third (13) and extrude corresponding axle sleeve.
3. The modular transmission device for vacuum circuit breaker spindle speed measurement according to claim 2, characterized in that: the one end of the flexible regulation axle of second (9) and the internally connected with first spiral tooth gear (11) that is located third gear box (18), the top of the flexible regulation axle of third (13) and the internally connected with second spiral tooth gear (17) that is located third gear box (18), wherein meshing connection between first spiral tooth gear (11) and second spiral tooth gear (17).
4. The modular transmission device for vacuum circuit breaker spindle speed measurement according to claim 1, characterized in that: one end of the first telescopic adjusting shaft (6) is in transmission connection with the output shaft (4) on one side of the main shaft transition joint (2) through two spiral-tooth gears, and the two spiral-tooth gears are located inside the first gear box body (5).
5. The modular transmission device for vacuum circuit breaker spindle speed measurement according to claim 4, characterized in that: the other end of the first telescopic adjusting shaft (6) is in transmission connection with the other end of the second telescopic adjusting shaft (9) through two spiral-tooth gears, and the two spiral-tooth gears are located inside the second gear box (7).
6. The modular transmission device for vacuum circuit breaker spindle speed measurement according to claim 1, characterized in that: a first positioning sleeve (19) and a first bearing (20) are arranged at the position of a connection position between the third telescopic adjusting shaft (13) and the third gear box (18), wherein the first bearing (20) is arranged on the outer side of the first positioning sleeve (19), the first bearing (20) is arranged on the third gear box (18), and the first positioning sleeve (19) is sleeved on the outer side of the third telescopic adjusting shaft (13).
7. The modular transmission device for vacuum circuit breaker spindle speed measurement according to claim 6, characterized in that: and a second positioning sleeve (21) is arranged at the connecting position between the first helical gear (11) and the third gear box (18), wherein a bearing is arranged outside the second positioning sleeve (21).
8. The modular transmission device for vacuum circuit breaker spindle speed measurement according to claim 6, characterized in that: and a third positioning sleeve (23), a fourth positioning sleeve (22) and a second bearing (24) are arranged at the connecting position between the second telescopic adjusting shaft (9) and the third gear box (18), wherein the second bearing (24) is arranged on the outer sides of the third positioning sleeve (23) and the fourth positioning sleeve (22), and the third positioning sleeve (23) and the fourth positioning sleeve (22) are sleeved on the outer side of the second telescopic adjusting shaft (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110249292.2A CN113053694B (en) | 2021-03-08 | 2021-03-08 | Vacuum circuit breaker main shaft speed measurement modularization transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110249292.2A CN113053694B (en) | 2021-03-08 | 2021-03-08 | Vacuum circuit breaker main shaft speed measurement modularization transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113053694A true CN113053694A (en) | 2021-06-29 |
| CN113053694B CN113053694B (en) | 2022-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110249292.2A Active CN113053694B (en) | 2021-03-08 | 2021-03-08 | Vacuum circuit breaker main shaft speed measurement modularization transmission |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1178506A1 (en) * | 2000-08-04 | 2002-02-06 | Schneider Electric High Voltage SA | Operating mechanism with chain and starting device for electrical high voltage switches |
| CN201945671U (en) * | 2010-12-27 | 2011-08-24 | 南京沃派科技有限公司 | Displacement sensor assembly for testing intelligent high-voltage circuit breaker |
| US20130002924A1 (en) * | 2010-03-15 | 2013-01-03 | Nikon Corporation | Electronic apparatus |
| JP2016225262A (en) * | 2015-06-04 | 2016-12-28 | 株式会社日立製作所 | Switch |
| CN207556840U (en) * | 2017-12-27 | 2018-06-29 | 福建中能电气有限公司 | Vacuum circuit breaker detecting tool |
| CN110849607A (en) * | 2019-11-27 | 2020-02-28 | 云南电网有限责任公司电力科学研究院 | Method for estimating gear jamming of spring operating mechanism of circuit breaker |
| CN211013474U (en) * | 2019-11-07 | 2020-07-14 | 廊坊市东电腾达电力工程有限公司 | Replaceable high-voltage circuit breaker speed measurement sensor transmission rod |
-
2021
- 2021-03-08 CN CN202110249292.2A patent/CN113053694B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1178506A1 (en) * | 2000-08-04 | 2002-02-06 | Schneider Electric High Voltage SA | Operating mechanism with chain and starting device for electrical high voltage switches |
| US20130002924A1 (en) * | 2010-03-15 | 2013-01-03 | Nikon Corporation | Electronic apparatus |
| CN201945671U (en) * | 2010-12-27 | 2011-08-24 | 南京沃派科技有限公司 | Displacement sensor assembly for testing intelligent high-voltage circuit breaker |
| JP2016225262A (en) * | 2015-06-04 | 2016-12-28 | 株式会社日立製作所 | Switch |
| CN207556840U (en) * | 2017-12-27 | 2018-06-29 | 福建中能电气有限公司 | Vacuum circuit breaker detecting tool |
| CN211013474U (en) * | 2019-11-07 | 2020-07-14 | 廊坊市东电腾达电力工程有限公司 | Replaceable high-voltage circuit breaker speed measurement sensor transmission rod |
| CN110849607A (en) * | 2019-11-27 | 2020-02-28 | 云南电网有限责任公司电力科学研究院 | Method for estimating gear jamming of spring operating mechanism of circuit breaker |
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|---|---|
| CN113053694B (en) | 2022-07-26 |
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