CN110595350B - High-voltage isolating switch angular displacement detection system and detection method thereof - Google Patents
High-voltage isolating switch angular displacement detection system and detection method thereof Download PDFInfo
- Publication number
- CN110595350B CN110595350B CN201910805836.1A CN201910805836A CN110595350B CN 110595350 B CN110595350 B CN 110595350B CN 201910805836 A CN201910805836 A CN 201910805836A CN 110595350 B CN110595350 B CN 110595350B
- Authority
- CN
- China
- Prior art keywords
- angular displacement
- characteristic quantity
- isolating switch
- data processing
- processing terminal
- 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.)
- Active
Links
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 87
- 238000001514 detection method Methods 0.000 title claims abstract description 26
- 238000004891 communication Methods 0.000 claims abstract description 17
- 230000003750 conditioning effect Effects 0.000 claims abstract description 17
- 230000002159 abnormal effect Effects 0.000 claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention discloses a high-voltage isolating switch angular displacement detection system and a detection method thereof. The detection system comprises an angular displacement sensor, a signal conditioning circuit and a controller: the system comprises a wireless communication module, a positioning module, a data processing terminal, a digital signal acquisition module and a data processing terminal, wherein the wireless communication module is used for acquiring the position information of the digital signal; the data processing terminal is used for converting the digital signal into angular displacement, drawing a curve of which the angular displacement changes along with time by combining the position information, and extracting the characteristic quantity of the current curve; then comparing the characteristic quantity and the angular displacement corresponding to the current curve end point with the characteristic quantity and the angular displacement corresponding to the normal state respectively to obtain a difference value of the characteristic quantity and the angular displacement; when the difference value between the two characteristic quantities is larger than a set threshold value, judging that the operating mechanism of the high-voltage isolating switch is abnormal; when the absolute value of the difference between the two angular displacements is larger than a set threshold value, judging that the opening and closing are not in place; and then displaying the curve and the determination result.
Description
Technical Field
The invention relates to the electrical field, in particular to a high-voltage isolating switch angular displacement detection system and a detection method thereof.
Background
As the power grid evolves, higher demands are placed on the reliability of the equipment. As the electrical equipment with the largest use amount, namely the high-voltage isolating switch, the operation condition of the high-voltage isolating switch is directly related to the safety of a power grid. The reliability of high voltage disconnectors depends to a large extent on the reliability of their mechanical operating systems.
The main function of the high-voltage isolating switch in the power grid is to establish a reliable insulation gap to separate equipment or lines to be overhauled from a power supply by an obvious disconnection point so as to ensure the safety of overhauling personnel and equipment. Therefore, whether the switching on/off of the high-voltage isolating switch is in place has a decisive effect on whether the established insulation gap is reliable or not.
However, at present, whether the opening and closing of the high-voltage isolating switch is in place or not is generally indicated qualitatively through an opening and closing indication board configured by the high-voltage isolating switch, so that the opening and closing degree of the high-voltage isolating switch cannot be accurately judged. If the travel is insufficient or the knife switch is not separated when the knife switch is separated, great danger is brought to operation and maintenance work.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a high-voltage isolating switch angular displacement detection system and a detection method thereof, wherein the detection system can reflect the switching-on and switching-off degree of a high-voltage isolating switch.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
the high-voltage isolating switch angular displacement detection system comprises a support frame, a power module for supplying power and a first support shaft for fixedly connecting with a rotating main shaft of the high-voltage isolating switch, wherein a driving wheel is arranged on the first support shaft; the support frame is connected with a second support shaft through two bearings and a bearing seat, a driven wheel meshed with the driving wheel is arranged on the second support shaft between the two bearings, the diameter of the driven wheel is smaller than that of the driving wheel, an angular displacement sensor for detecting the angular displacement of the second support shaft is arranged on the support frame, the output end of the angular displacement sensor is connected with a signal conditioning circuit, the signal conditioning circuit is connected with a controller, the controller is respectively connected with a positioning module and a wireless communication module, and the wireless communication module is connected with a data processing terminal;
the signal conditioning circuit is used for converting the analog signals acquired by the angular displacement sensor into digital signals;
the controller is used for reducing the digital signals according to the set proportion and then sending the reduced digital signals and the position information acquired by the positioning module to the data processing terminal through the wireless communication module;
the data processing terminal is used for converting the reduced digital signals into angular displacement on the rotating main shaft, drawing and displaying curves of the angular displacement of the rotating main shaft at different positions along with time by combining the position information, and extracting characteristic quantities of the current curves; then comparing the angular displacement corresponding to the characteristic quantity and the current curve end point with the characteristic quantity and the angular displacement corresponding to the normal state stored in the data processing terminal respectively to obtain a difference value of the characteristic quantity and the angular displacement; when the difference value between the two characteristic quantities is larger than the threshold value of the corresponding set characteristic quantity, judging that the operating mechanism of the high-voltage isolating switch is abnormal; when the absolute value of the difference between the two angular displacements is larger than the corresponding set angular displacement threshold value, judging that the opening and closing are not in place; and then displaying the curve and the determination result.
Further, the angular displacement sensor is a potentiometer.
Further, the wireless communication module is a Zigbee module.
Further, the transmission ratio of the driving wheel to the driven wheel is 3.6:1.
Further, a mounting rack for mounting on a telegraph pole is arranged on the support frame.
Further, extracting the feature quantity of the current curve further includes:
and calculating the average value and the amplitude value between all adjacent two points of the current curve to obtain a plurality of groups of average values and amplitude values, comparing the average value and the amplitude value of each group, and if the average value and the amplitude value are the same, adding 1 to the count, and taking the count as the characteristic quantity.
On the other hand, a detection method of the high-voltage isolating switch angular displacement detection system designed according to the scheme is provided, and the detection method comprises the following steps:
s1, an angular displacement sensor collects analog signals and sends the analog signals to a signal conditioning circuit, and the signal conditioning circuit converts the received analog signals into digital signals and sends the digital signals to a controller;
s2, the controller reduces the digital signals according to a set proportion and then sends the reduced digital signals and the position information acquired by the positioning module to the data processing terminal through the wireless communication module;
s3, converting the reduced digital signals into angular displacement on the rotating spindle by the data processing terminal, drawing and displaying curves of the angular displacement of the rotating spindle at different positions along with time by combining the position information, and extracting characteristic quantities of the current curves; then comparing the angular displacement corresponding to the characteristic quantity and the current curve end point with the characteristic quantity and the angular displacement corresponding to the normal state stored in the data processing terminal respectively to obtain a difference value of the characteristic quantity and the angular displacement; when the difference value between the two characteristic quantities is larger than the threshold value of the corresponding set characteristic quantity, judging that the operating mechanism of the high-voltage isolating switch is abnormal; when the absolute value of the difference between the two angular displacements is larger than the corresponding set angular displacement threshold value, judging that the opening and closing are not in place; and then displaying the curve and the determination result.
The beneficial effects of the invention are as follows:
because the first supporting shaft is fixedly connected with the rotating main shaft, and the driving wheel is in key connection with the first supporting shaft, the rotating main shaft rotates to drive the supporting shaft and the driving wheel to synchronously rotate (the angular speed is the same). The rotation of the driving wheel drives the driven wheel to synchronously rotate (the linear speed is the same), and the angular speed of the driven wheel is in direct proportion to the angular speed of the driving wheel because the diameter of the driven wheel is smaller than that of the driving wheel. The driven wheel rotates to drive the second supporting shaft to synchronously rotate (the angular speed is the same), so that the angular displacement of the rotating main shaft is amplified, and the detection precision of the system is improved.
Meanwhile, as the data processing terminal displays the curve and the judging result (whether the opening and closing is in place or not and whether the operating mechanism is abnormal or not), a worker can directly obtain the conclusion that whether the opening and closing is in place or not and whether the operating mechanism is abnormal or not, not only can the layering degree of the opening and closing be known through the curve, but also the rotating working condition of the rotating main shaft can be intuitively observed, so that the worker can more easily find possible faults (such as jamming) of the operating mechanism of the high-voltage isolating switch, thereby accurately overhauling the high-voltage isolating switch and prolonging the service life of the high-voltage isolating switch.
Drawings
Fig. 1 is a schematic structural diagram of a high-voltage isolating switch angular displacement detection system in an application of the embodiment.
1, rotating a main shaft; 2. a first support shaft; 3. a driving wheel; 4. driven wheel; 5. a bearing; 6. a bearing seat; 7. a support frame; 8. an angular displacement sensor (8); 9. and a second support shaft.
Detailed Description
The following detailed description of the invention is presented in conjunction with the drawings to facilitate understanding of the invention by those skilled in the art. It should be apparent that the embodiments described below are only some, but not all embodiments of the invention. All other embodiments, which come within the spirit and scope of the invention as defined and defined by the following claims, may be made by one skilled in the art without any inventive faculty.
As shown in fig. 1, the high-voltage isolating switch angular displacement detection system comprises a support frame 7, a power module for supplying power and a first support shaft 2 fixedly connected with a rotating main shaft 1 of the high-voltage isolating switch, wherein a driving wheel 3 is arranged on the first support shaft 2; the support frame 7 is connected with a second support shaft 9 through two bearings 5 and a bearing seat 6, a driven wheel 4 meshed with the driving wheel 3 is arranged on the second support shaft 9 between the two bearings 5, the diameter of the driven wheel 4 is smaller than that of the driving wheel 3, an angular displacement sensor 8 for detecting the angular displacement of the second support shaft 9 is arranged on the support frame 7, the output end of the angular displacement sensor 8 is connected with a signal conditioning circuit, the signal conditioning circuit is connected with a controller, the controller is respectively connected with a positioning module and a wireless communication module, and the wireless communication module is connected with a data processing terminal;
the signal conditioning circuit is used for converting the analog signals acquired by the angular displacement sensor 8 into digital signals;
the controller is used for reducing the digital signals according to the set proportion and then sending the reduced digital signals and the position information acquired by the positioning module to the data processing terminal through the wireless communication module;
the data processing terminal is used for converting the reduced digital signals into angular displacement on the rotating main shaft, drawing and displaying curves of the angular displacement of the rotating main shaft at different positions along with time by combining the position information, and extracting characteristic quantities of the current curves; then comparing the angular displacement corresponding to the characteristic quantity and the current curve end point with the characteristic quantity and the angular displacement corresponding to the normal state stored in the data processing terminal respectively to obtain a difference value of the characteristic quantity and the angular displacement; when the difference value between the two characteristic quantities is larger than the threshold value of the corresponding set characteristic quantity, judging that the operating mechanism of the high-voltage isolating switch is abnormal; when the absolute value of the difference between the two angular displacements is larger than the corresponding set angular displacement threshold value, judging that the opening and closing are not in place; and then displaying the curve and the determination result.
In implementation, the feature extraction of the present solution preferably further includes:
and calculating the average value and the amplitude value between all adjacent two points of the current curve to obtain a plurality of groups of average values and amplitude values, comparing the average value and the amplitude value of each group, and if the average value and the amplitude value are the same, adding 1 to the count, and taking the count as the characteristic quantity. So as to find out the jamming phenomenon of the operating mechanism. Thereby performing maintenance.
And when the data processing terminal displays whether the operating mechanism is abnormal, displaying the degree of abnormality according to the difference value between the two characteristic quantities. The larger the difference value between the two characteristic quantities is, the more serious the jam phenomenon is reflected, so that the staff can conveniently and timely overhaul, and the serious fault or safety accident caused by evolution is avoided.
As shown in fig. 1, when in use, the support frame 7 is fixedly mounted on the ground, and the angular displacement sensor 8 is a potentiometer. The wireless communication module is a Zigbee module, so that the data processing terminal can simultaneously receive more than 50 signals transmitted by the signal conditioning circuits.
Wherein the transmission ratio of the driving wheel 3 to the driven wheel is 3.6:1. Because the rotating main shaft 1 rotates 90 degrees generally during opening and closing, the angular displacement can be amplified by 3.6 times (the maximum value does not exceed 324 degrees) through the arrangement, so that the value detected by the angular displacement sensor 8 has a unique corresponding relation with the angle formed by opening and closing during amplifying.
In another embodiment, the support frame 7 is provided with a mounting rack for mounting on a telegraph pole to reduce the mounting procedure of the high voltage isolating switch angular displacement detection system.
The detection method of the high-voltage isolating switch angular displacement detection system designed by the scheme comprises the following steps:
s1, an angular displacement sensor 8 collects analog signals and sends the analog signals to a signal conditioning circuit, and the signal conditioning circuit converts the received analog signals into digital signals and sends the digital signals to a controller;
s2, the controller reduces the digital signals according to a set proportion and then sends the reduced digital signals and the position information acquired by the positioning module to the data processing terminal through the wireless communication module;
s3, converting the reduced digital signals into angular displacement on the rotating spindle by the data processing terminal, drawing and displaying curves of the angular displacement of the rotating spindle at different positions along with time by combining the position information, and extracting characteristic quantities of the current curves; then comparing the angular displacement corresponding to the characteristic quantity and the current curve end point with the characteristic quantity and the angular displacement corresponding to the normal state stored in the data processing terminal respectively to obtain a difference value of the characteristic quantity and the angular displacement; when the difference value between the two characteristic quantities is larger than the threshold value of the corresponding set characteristic quantity, judging that the operating mechanism of the high-voltage isolating switch is abnormal; when the absolute value of the difference between the two angular displacements is larger than the corresponding set angular displacement threshold value, judging that the opening and closing are not in place; and then displaying the curve and the determination result.
Claims (6)
1. The high-voltage isolating switch angular displacement detection system is characterized by comprising a support frame (7), a power module for supplying power and a first support shaft (2) fixedly connected with a rotating main shaft (1) of the high-voltage isolating switch, wherein a driving wheel (3) is arranged on the first support shaft (2); the support frame (7) is connected with a second support shaft (9) through two bearings (5) and a bearing seat (6), a driven wheel (4) meshed with the driving wheel (3) is arranged on the second support shaft (9) between the two bearings (5), the diameter of the driven wheel (4) is smaller than that of the driving wheel (3), an angular displacement sensor (8) for detecting the angular displacement of the second support shaft (9) is arranged on the support frame (7), the output end of the angular displacement sensor (8) is connected with a signal conditioning circuit, the signal conditioning circuit is connected with a controller, the controller is respectively connected with a positioning module and a wireless communication module, and the wireless communication module is connected with a data processing terminal;
the signal conditioning circuit is used for converting the analog signals acquired by the angular displacement sensor (8) into digital signals;
the controller is used for reducing the digital signals according to a set proportion and then sending the reduced digital signals and the position information acquired by the positioning module to the data processing terminal through the wireless communication module;
the data processing terminal is used for converting the reduced digital signals into angular displacement on the rotating spindle, then drawing and displaying curves of the angular displacement of the rotating spindle at different positions along with time by combining the position information, extracting characteristic quantities of the current curve, calculating average values and amplitude values between all adjacent two points of the current curve to obtain multiple groups of average values and amplitude values, comparing the average value and the amplitude value of each group, if the average values and the amplitude values are the same, adding 1 to the count, and taking the count as the characteristic quantity; then comparing the angular displacement corresponding to the characteristic quantity and the current curve end point with the characteristic quantity and the angular displacement corresponding to the normal state stored in the data processing terminal respectively to obtain a difference value of the characteristic quantity and the angular displacement; when the difference value between the two characteristic quantities is larger than the threshold value of the corresponding set characteristic quantity, judging that the operating mechanism of the high-voltage isolating switch is abnormal; when the absolute value of the difference between the two angular displacements is larger than the corresponding set angular displacement threshold value, judging that the opening and closing are not in place; and then displaying the curve and the judgment result.
2. The high-voltage isolating switch angular displacement detection system according to claim 1, characterized in that the angular displacement sensor (8) is a potentiometer.
3. The system of claim 1, wherein the wireless communication module is a Zigbee module.
4. The high-voltage isolating switch angular displacement detection system according to claim 1, wherein the transmission ratio of the driving wheel (3) to the driven wheel is 3.6:1.
5. The high-voltage isolating switch angular displacement detection system according to claim 1, characterized in that the support frame (7) is provided with a mounting rack for mounting on a utility pole.
6. A method of detecting an angular displacement of a high voltage disconnector according to any of claims 1-5, comprising:
s1, an angular displacement sensor (8) collects analog signals and sends the analog signals to a signal conditioning circuit, and the signal conditioning circuit converts the received analog signals into digital signals and sends the digital signals to a controller;
s2, the controller reduces the digital signals according to a set proportion and then sends the reduced digital signals and the position information acquired by the positioning module to the data processing terminal through the wireless communication module;
s3, converting the reduced digital signals into angular displacement on the rotating spindle by the data processing terminal, drawing and displaying curves of the angular displacement of the rotating spindle at different positions along with time by combining the position information, and extracting characteristic quantities of the current curves; then comparing the angular displacement corresponding to the characteristic quantity and the current curve end point with the characteristic quantity and the angular displacement corresponding to the normal state stored in the data processing terminal respectively to obtain a difference value of the characteristic quantity and the angular displacement; when the difference value between the two characteristic quantities is larger than the threshold value of the corresponding set characteristic quantity, judging that the operating mechanism of the high-voltage isolating switch is abnormal; when the absolute value of the difference between the two angular displacements is larger than the corresponding set angular displacement threshold value, judging that the opening and closing are not in place; and then displaying the curve and the judgment result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910805836.1A CN110595350B (en) | 2019-08-29 | 2019-08-29 | High-voltage isolating switch angular displacement detection system and detection method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910805836.1A CN110595350B (en) | 2019-08-29 | 2019-08-29 | High-voltage isolating switch angular displacement detection system and detection method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110595350A CN110595350A (en) | 2019-12-20 |
| CN110595350B true CN110595350B (en) | 2024-04-09 |
Family
ID=68856392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910805836.1A Active CN110595350B (en) | 2019-08-29 | 2019-08-29 | High-voltage isolating switch angular displacement detection system and detection method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110595350B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113341308B (en) * | 2021-04-19 | 2023-04-18 | 云南电网有限责任公司临沧供电局 | Method and system for judging action characteristics of isolating switch |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008004483A (en) * | 2006-06-26 | 2008-01-10 | Chugoku Electric Power Co Inc:The | Operation monitoring device of disconnector, disconnector, and operation monitoring method of disconnector |
| CN102608357A (en) * | 2011-01-24 | 2012-07-25 | 阿尔卑斯电气株式会社 | Angular speed detection apparatus and method for detecting angular speed error |
| CN105548876A (en) * | 2016-01-28 | 2016-05-04 | 国网北京市电力公司 | Method and device for detection of mechanical features of disconnection switch |
| CN106546210A (en) * | 2016-11-25 | 2017-03-29 | 云南电网有限责任公司电力科学研究院 | A kind of disconnecting switch outer corner measurement system and method for on-line monitoring |
| CN106601534A (en) * | 2016-11-22 | 2017-04-26 | 平高集团有限公司 | High-voltage isolating switch and high-voltage isolating switch transmission mechanism fault monitoring method |
| CN107917681A (en) * | 2017-11-30 | 2018-04-17 | 国网江苏省电力有限公司检修分公司 | High voltage isolator angle of eccentricity measuring device and method based on toothed belt transmission |
| CN108007418A (en) * | 2017-11-30 | 2018-05-08 | 国网江苏省电力有限公司检修分公司 | Based on gear-driven high voltage isolator transmission shaft corner measuring apparatus and method |
| CN109036884A (en) * | 2018-09-19 | 2018-12-18 | 宁夏力成电气集团有限公司 | A kind of Intelligent high-voltage vacuum circuit breaker and its mechanical property parameter determination method |
| CN109738181A (en) * | 2019-01-09 | 2019-05-10 | 国网湖南省电力有限公司 | Isolator operating mechanism and its application method with mechanical bite detection function |
| CN210346593U (en) * | 2019-08-29 | 2020-04-17 | 国网四川省电力公司电力科学研究院 | Angular displacement detector for high-voltage isolating switch |
-
2019
- 2019-08-29 CN CN201910805836.1A patent/CN110595350B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008004483A (en) * | 2006-06-26 | 2008-01-10 | Chugoku Electric Power Co Inc:The | Operation monitoring device of disconnector, disconnector, and operation monitoring method of disconnector |
| CN102608357A (en) * | 2011-01-24 | 2012-07-25 | 阿尔卑斯电气株式会社 | Angular speed detection apparatus and method for detecting angular speed error |
| CN105548876A (en) * | 2016-01-28 | 2016-05-04 | 国网北京市电力公司 | Method and device for detection of mechanical features of disconnection switch |
| CN106601534A (en) * | 2016-11-22 | 2017-04-26 | 平高集团有限公司 | High-voltage isolating switch and high-voltage isolating switch transmission mechanism fault monitoring method |
| CN106546210A (en) * | 2016-11-25 | 2017-03-29 | 云南电网有限责任公司电力科学研究院 | A kind of disconnecting switch outer corner measurement system and method for on-line monitoring |
| CN107917681A (en) * | 2017-11-30 | 2018-04-17 | 国网江苏省电力有限公司检修分公司 | High voltage isolator angle of eccentricity measuring device and method based on toothed belt transmission |
| CN108007418A (en) * | 2017-11-30 | 2018-05-08 | 国网江苏省电力有限公司检修分公司 | Based on gear-driven high voltage isolator transmission shaft corner measuring apparatus and method |
| CN109036884A (en) * | 2018-09-19 | 2018-12-18 | 宁夏力成电气集团有限公司 | A kind of Intelligent high-voltage vacuum circuit breaker and its mechanical property parameter determination method |
| CN109738181A (en) * | 2019-01-09 | 2019-05-10 | 国网湖南省电力有限公司 | Isolator operating mechanism and its application method with mechanical bite detection function |
| CN210346593U (en) * | 2019-08-29 | 2020-04-17 | 国网四川省电力公司电力科学研究院 | Angular displacement detector for high-voltage isolating switch |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110595350A (en) | 2019-12-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106443362A (en) | Power distribution network fault detection system | |
| CN110595350B (en) | High-voltage isolating switch angular displacement detection system and detection method thereof | |
| CN102116823A (en) | System for automatically judging and positioning faults of automatic blocking and continuous railway power lines in railway distribution network | |
| CN103018666A (en) | On-line monitoring/diagnostic system and method of intelligent circuit breaker | |
| CN106646116A (en) | Trouble shooting and locating method for power distribution network | |
| CN210346593U (en) | Angular displacement detector for high-voltage isolating switch | |
| CN110336210B (en) | Intelligent quick replacement system of high-voltage switch cabinet | |
| CN111245094A (en) | Load real-time monitoring visualization device with positioning function | |
| CN203572905U (en) | Automatic monitoring device for train power supply failure | |
| CN202372620U (en) | Detection circuit of circuit breaker | |
| CN205139295U (en) | Little electric wire netting vacuum circuit breaker with communication detects function | |
| CN202230182U (en) | Power transformer on-load tap-changer mechanical characteristic on-line monitoring device | |
| CN215116642U (en) | Switch cabinet grounding switch contact in-place detection device | |
| CN215180561U (en) | Patrol formula cubical switchboard monitoring devices | |
| CN201910656U (en) | Power cutover chopper switch system for communication equipment | |
| CN111208803A (en) | Tank gun control system fault online detection device and method | |
| CN213152068U (en) | Device for monitoring and switching transmitted audio signals | |
| CN216248209U (en) | Insulating automatic check out system of fan coil | |
| KR101011002B1 (en) | Gas insulated apparatus | |
| CN217590376U (en) | Relay protection device and switch cabinet | |
| CN219774272U (en) | Wind driven generator safety detection device with self-checking function | |
| CN215932432U (en) | Single-rack centralized maintenance control system based on rolling mill zero-speed signal | |
| CN219831287U (en) | Simple high-voltage insulation detection device | |
| CN220015397U (en) | Data acquisition system and wind turbine generator system | |
| CN214675167U (en) | Short wave station wisdom fortune dimension system |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |