CN110618352A - 10 kilovolt distribution lines single-phase earth fault addressing device - Google Patents

10 kilovolt distribution lines single-phase earth fault addressing device Download PDF

Info

Publication number
CN110618352A
CN110618352A CN201911004375.4A CN201911004375A CN110618352A CN 110618352 A CN110618352 A CN 110618352A CN 201911004375 A CN201911004375 A CN 201911004375A CN 110618352 A CN110618352 A CN 110618352A
Authority
CN
China
Prior art keywords
movable rod
side plate
fixed seat
fault
addressing device
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.)
Pending
Application number
CN201911004375.4A
Other languages
Chinese (zh)
Inventor
罗道军
彭清峰
张亚涛
李春辉
杨楠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanyang Power Supply Co of State Grid Henan Electric Power Co Ltd
Original Assignee
Nanyang Power Supply Co of State Grid Henan Electric Power Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nanyang Power Supply Co of State Grid Henan Electric Power Co Ltd filed Critical Nanyang Power Supply Co of State Grid Henan Electric Power Co Ltd
Priority to CN201911004375.4A priority Critical patent/CN110618352A/en
Publication of CN110618352A publication Critical patent/CN110618352A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08Locating faults in cables, transmission lines, or networks
    • G01R31/081Locating faults in cables, transmission lines, or networks according to type of conductors
    • G01R31/085Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead

Abstract

The invention discloses a 10 kV distribution line single-phase earth fault addressing device which comprises a main shell, wherein a component board is arranged inside the main shell, a detection chip module, two state inductors, an actuator module and a fault change-over switch are arranged on the upper surface of the component board, the fault change-over switch comprises a hollow fixed seat and a movable rod, the movable rod is movably sleeved with the inside of the hollow fixed seat, an alternate rotating piece is arranged on one side of the movable rod, which is far away from a second side plate, a first semi-cylinder display block and a second semi-cylinder display block are symmetrically connected to two sides of a center shaft of the alternate rotating piece, a folding connecting rod is connected to one end of the center shaft of the alternate rotating piece in a hot melting mode, and the other end of the folding connecting rod is rotatably connected to the top of the. The invention can well prompt the position of the fault, is convenient for the work of maintainers and improves the efficiency of fault treatment.

Description

10 kilovolt distribution lines single-phase earth fault addressing device
Technical Field
The invention mainly relates to the technical field of circuit fault troubleshooting, in particular to a single-phase earth fault addressing device for a 10-kilovolt distribution line.
Background
Under the background of vigorous development of infrastructure equipment such as power grids in China, more and more power facilities are put into use, and the number of covered basic accessories such as cables, distribution boxes and the like is very large in large-scale projects such as west-east power transmission and the like, each power device needs to be maintained regularly to ensure the smoothness of the whole circuit and provide better guarantee for the power work, in the process of maintenance by the maintainers, faults exist on the part of the electric equipment, but clear judgment is not easy to be carried out at any moment, so that the maintenance period is slowed down, the portable fault prompting addresser installed on the circuit needs to be designed to help the maintainer to quickly find the root of the fault, make correct judgment and then process.
Disclosure of Invention
The invention mainly provides a single-phase earth fault addressing device for a 10 kV distribution line, which is used for solving the technical problems in the background technology.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a10 KV distribution line single-phase ground fault addressing device comprises a main shell, a first side plate, a second side plate and a wiring base plate, wherein the top of the main shell is of a semi-arc shape, the first side plate and the second side plate are fixed on two sides of the main shell respectively through bolt attachment, two end side edges of the wiring base plate are respectively in hot melting connection with inner walls of two ends of the bottom of the main shell, a component plate is arranged inside the main shell, four vertex angles at the bottom of the component plate are respectively fixedly connected with the upper surface of the wiring base plate through screws, a fault switching switch is vertically arranged at the center of one side edge of the component plate close to the second side plate and comprises a hollow fixing seat and a movable rod, the movable rod is movably sleeved with the inside of the hollow fixing seat, and one side of the movable rod, far away from the second side plate, is provided with an alternating rotating piece, a first semi-cylinder display block and a second semi-cylinder display block are symmetrically connected to two sides of a center shaft of the alternate rotating piece, a folding connecting rod is connected to one end of the center shaft of the alternate rotating piece in a hot melting mode, the other end of the folding connecting rod is rotatably connected with the top of the movable rod through a shaft rod, and a supporting shaft is connected to one end, far away from the folding connecting rod, of the center shaft of the alternate rotating piece in a hot melting mode;
the component board upper surface is equipped with the detection chip module, one side of detecting the chip module is equipped with two state inductors, just the one end of detecting the chip module transversely is equipped with the executor module, the executor module pass through the wire with the fault change over switch is electric connection.
Furthermore, the inner wall of the first side plate is connected with a supporting seat in a hot melting mode, a bearing is arranged in the supporting seat in a clamping mode, and the bearing sleeve is arranged on the outer wall of the supporting shaft in a matched mode.
Further, the top of the main casing body is provided with an observation port, and transparent glass is embedded in the observation port.
Furthermore, a round observation port is formed in the upper end of the second side plate, and transparent glass is embedded in the round observation port.
Further, the circular arc surface of first halfcylinder show piece and second halfcylinder show piece is equipped with first sticker on the surface and glues glutinous groove and second sticker on the surface respectively.
Furthermore, the cavity fixing base is close to both ends are fixed with electromagnetism spring screens ware and electromagnetism actuation locator respectively about the lateral wall of executor module, the inside of electromagnetism spring screens ware runs through the casing swing joint of cavity fixing base has the triangle thimble of spring, just the inside of electromagnetism actuation locator runs through the casing of cavity fixing base is connected with the electro-magnet generation module through the wire, the electro-magnet generation module is fixed in on the infrabasal plate of cavity fixing base.
Furthermore, the movable rod is far away from be equipped with the lug perpendicularly on one side lateral wall of folding connecting rod, the lug with the spout that sets up on the cavity fixing base is identical and is sliding connection, the bottom of lug is equipped with the iron plate, the iron plate embedded with in the bottom casing of movable rod.
Furthermore, one side of the movable rod close to the actuator module is provided with a triangular clamping groove, the triangular clamping groove is positioned on the shell of the movable rod close to the bottom, and the triangular clamping groove is matched with the spring triangular thimble in size.
Compared with the prior art, the invention has the beneficial effects that:
the ground fault addressing device is installed in the existing distribution line, after a power line and a ground line are connected through a wiring base plate, the current magnitude on the line is detected in real time through the matching of a detection chip module and two state sensors, when fault characteristics occur, a movable rod in a fault switch is controlled to pop out from a hollow fixed seat through an actuator module, and a rotating piece is turned over for 180 degrees through the linkage effect of a folding connecting rod, so that a first semi-cylinder display block and a second semi-cylinder display block are forced to be exchanged with each other and a fault alarm prompt is given, the fault position is effectively prompted, the fast searching and fault judgment of maintainers are facilitated, and the fault processing efficiency is improved better.
The present invention will be explained in detail below with reference to the drawings and specific embodiments.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the overall internal structure of the present invention;
FIG. 3 is an enlarged view of area A in FIG. 2;
FIG. 4 is a schematic view of the inner wall structure of the first side plate according to the present invention;
fig. 5 is a sectional view showing an internal structure of the fail-over switch of the present invention.
Description of the drawings: 1. a main housing; 11. a viewing port; 2. a first side plate; 21. a supporting seat; 211. a bearing; 3. a second side plate; 31. a circular viewing port; 4. a wiring base plate; 5. a component board; 51. a fail-over switch; 511. a hollow fixing seat; 511a, a chute; 512. a movable rod; 512a, a bump; 512b, iron blocks; 512c, a triangular clamping groove; 513. an electromagnetic spring retainer; 513a, a spring triangular thimble; 514. an electromagnetic attraction positioner; 514a, an electromagnet generating module; 52. rotating the rotary member in turns; 521. a first semi-cylindrical display block; 521a, a first sticker sticking groove; 522. a second semi-cylindrical display block; 522a, a second sticker sticking groove 523 and a support shaft; 524. folding the connecting rod; 53. detecting a chip module; 54. a state sensor; 55. an actuator module.
Detailed Description
In order to facilitate an understanding of the invention, the invention will now be described more fully hereinafter with reference to the accompanying drawings, in which several embodiments of the invention are shown, but which may be embodied in different forms and not limited to the embodiments described herein, but which are provided so as to provide a more thorough and complete disclosure of the invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, as the terms "vertical", "horizontal", "left", "right" and the like are used herein for descriptive purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the knowledge of the terms used herein in the specification of the present invention is for the purpose of describing particular embodiments and is not intended to limit the present invention, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Please refer to fig. 1-3 in greater detail, a 10 kv distribution line single-phase ground fault addressing device includes a main housing 1, a first side plate 2, a second side plate 3 and a wiring base plate 4, wherein the top of the main housing 1 is a semi-arc shape, the first side plate 2 and the second side plate 3 are respectively fixed on two sides of the main housing 1 by bolts, two side edges of the wiring base plate 4 are respectively connected with inner walls of two ends of the bottom of the main housing 1 by thermal melting, a component plate 5 is arranged inside the main housing 1, four top corners of the bottom of the component plate 5 are respectively fixedly connected with the upper surface of the wiring base plate 4 by screws, a fault switch 51 is vertically arranged at a center of one side edge of the component plate 5 close to the second side plate 3, the fault switch 51 includes a hollow fixing seat 511 and a movable rod 512, the movable rod 512 is movably sleeved with the inside of the hollow fixed seat 511, one side of the movable rod 512, which is far away from the second side plate 3, is provided with an alternate rotating part 52, two sides of a center shaft of the alternate rotating part 52 are symmetrically connected with a first semi-cylinder display block 521 and a second semi-cylinder display block 522, one end of the center shaft of the alternate rotating part 52 is in hot melting connection with a folding connecting rod 524, the other end of the folding connecting rod 524 is in rotary connection with the top of the movable rod 512 through a shaft rod, and one end of the center shaft of the alternate rotating part 52, which is far away from the folding connecting rod 524, is in hot melting; the upper surface of the component board 5 is provided with a detection chip module 53, one side of the detection chip module 53 is provided with two state sensors 54, one end of the detection chip module 53 is transversely provided with an actuator module 55, and the actuator module 55 is electrically connected with the fault switching switch 51 through a lead.
Please refer to fig. 4, a support seat 21 is connected to an inner wall of the first side plate 2 by thermal melting, a bearing 211 is clamped in the support seat 21, and the bearing 211 is sleeved on an outer wall of the support shaft 523 to be in fit connection. In this embodiment, the rotation and support of the alternate rotation member 52 is achieved by the support base 21 in cooperation with the bearing 211.
Please refer to fig. 1 again, the top of the main housing 1 is provided with a viewing port 11, and the viewing port 11 is embedded with transparent glass. In this embodiment, the transparent glass provided in the observation port 11 is used for convenience
Referring to fig. 1 again, a circular viewing port 31 is formed at the upper end of the second side plate 3, and transparent glass is embedded in the circular viewing port 31. In the present embodiment, the observation of the fault state at different angles is assisted by the transparent glass provided in the circular observation port 31.
Please refer to fig. 2, the first half-cylinder display block 521 and the second half-cylinder display block 522 have a first sticker adhesive groove 521a and a second sticker adhesive groove 522a on their arc surfaces, respectively. In this embodiment, the normal line status is indicated by pasting a white prompt sticker in the first sticker pasting slot 521a, and the fault line status is indicated by pasting a red prompt sticker in the second sticker pasting slot 522 a.
Please refer to fig. 3 and 5 again, an electromagnetic spring retainer 513 and an electromagnetic pull-in locator 514 are respectively fixed at the upper and lower ends of the sidewall of the hollow fixing seat 511 close to the actuator module 55, a spring triangular thimble 513a is movably connected to the inner portion of the electromagnetic spring retainer 513 penetrating through the housing of the hollow fixing seat 511, an electromagnet generating module 514a is connected to the inner portion of the electromagnetic pull-in locator 514 penetrating through the housing of the hollow fixing seat 511 through a conducting wire, and the electromagnet generating module 514a is fixed on the inner bottom plate of the hollow fixing seat 511; a convex block 512a is vertically arranged on the side wall of one side of the movable rod 512, which is far away from the folding connecting rod 524, the convex block 512a is matched with a sliding groove 511a arranged on the hollow fixed seat 511 and is in sliding connection with the same, an iron block 512b is arranged at the bottom of the convex block 512a, and the iron block 512b is embedded in a bottom shell of the movable rod 512; one side of the movable rod 512 close to the actuator module 55 is provided with a triangular clamping groove 512c, the triangular clamping groove 512c is located on the shell of the movable rod 512 close to the bottom, and the triangular clamping groove 512c is matched with the spring triangular thimble 513a in size. In this embodiment, the protrusion 512a on the movable rod 512 is slidably connected with the sliding slot 511a on the hollow fixed seat 511, then the electromagnet generating module 514a generates magnetism by the on-off circuit of the electromagnetic attracting positioner 514, and when the electromagnet generating module generates magnetic force in the state of passage, the electromagnet generating module and the iron block 512b at the bottom of the movable rod 512 form repulsive magnetism, the movable rod 512 is pushed out of the hollow fixed seat 511 upwards, and the triangular clamping slot 512c is engaged with the spring triangular thimble 513a controlled by the electromagnetic spring clamping device 513 in the displacement process, and then the movable rod 512 is limited.
The specific process of the invention is as follows:
firstly, after the ground fault addressing device of the invention is installed on the line, a working power supply and a ground line are connected to the wiring base plate 4, then the starting device is started to work, through real-time detection of the detection chip module 53, when a fault is detected, the two state sensors 54 sense the fault first, the detection chip module 53 instructs the actuator module 55 to conduct electrification control on the electromagnetic attraction positioner 514 on the fault switch 51, magnetic force is generated on the electromagnet generation module 514a to form repulsive magnetism with the iron block 512b at the bottom of the movable rod 512, the movable rod 512 is pushed upwards out of the hollow fixed seat 511, after the triangular clamping groove 512c is engaged with the spring triangular thimble 513a controlled by the electromagnetic spring clamping device 513 in the displacement process, at the moment, the folding connecting rod 524 rotatably connected with the top of the movable rod 512 drives the first semi-cylindrical display block 521 and the second semi-cylindrical display block 522 on the rotating part 52 to perform 180-degree transposition, the white prompting paster pasted in the first paster pasting groove 521a is converted into the red prompting paster pasted in the second paster pasting groove 522a to prompt that the line state is faulty, the line state is checked at the observation port 11 or the round observation port 31, and after the fault is processed, the detection chip module 53 can be automatically reset.
The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to adopt such insubstantial modifications of the inventive concept and solution, or to apply the inventive concept and solution directly to other applications without such modifications.

Claims (8)

1. The single-phase ground fault addressing device for the 10-kilovolt distribution line comprises a main shell (1), a first side plate (2), a second side plate (3) and a wiring base plate (4), and is characterized in that the top of the main shell (1) is of a semi-arc shape, the first side plate (2) and the second side plate (3) are fixed on two sides of the main shell (1) through bolt attachment respectively, two end side edges of the wiring base plate (4) are connected with inner walls at two ends of the bottom of the main shell (1) in a hot melting mode respectively, an element plate (5) is arranged inside the main shell (1), four top corners at the bottom of the element plate (5) are fixedly connected with the upper surface of the wiring base plate (4) through screws one by one, a fault switching switch (51) is vertically arranged at the edge center of one side edge of the element plate (5) close to the second side plate (3), the fault switch (51) comprises a hollow fixed seat (511) and a movable rod (512), the movable rod (512) is movably sleeved with the inside of the hollow fixed seat (511), one side, far away from the second side plate (3), of the movable rod (512) is provided with a rotation member (52), two sides of a center shaft of the rotation member (52) are symmetrically connected with a first semi-cylinder display block (521) and a second semi-cylinder display block (522), one end of the center shaft of the rotation member (52) is in hot melting connection with a folding connecting rod (524), the other end of the folding connecting rod (524) is in rotary connection with the top of the movable rod (512) through a shaft rod, and one end, far away from the folding connecting rod (524), of the center shaft of the rotation member (52) is in hot melting connection with a supporting shaft (523);
the upper surface of the component board (5) is provided with a detection chip module (53), one side of the detection chip module (53) is provided with two state inductors (54), one end of the detection chip module (53) is transversely provided with an actuator module (55), and the actuator module (55) is electrically connected with the fault switching switch (51) through a wire.
2. The single-phase ground fault addressing device for the 10 kv distribution line according to claim 1, wherein a supporting seat (21) is thermally connected to an inner wall of the first side plate (2), a bearing (211) is clamped in the supporting seat (21), and the bearing (211) is sleeved on an outer wall of the supporting shaft (523) to be in fit connection.
3. The single-phase ground fault addressing device for 10 kv distribution lines according to claim 1, characterized in that the top of the main housing (1) is provided with a viewing port (11), and the viewing port (11) is embedded with a transparent glass.
4. The single-phase ground fault addressing device for the 10 kV distribution line according to claim 1, wherein a circular observation opening (31) is formed in the upper end of the second side plate (3), and transparent glass is embedded in the circular observation opening (31).
5. The single-phase ground fault addressing device for 10 kv distribution lines as claimed in claim 1, wherein the first half-cylinder display block (521) and the second half-cylinder display block (522) are respectively provided with a first sticker sticking groove (521 a) and a second sticker sticking groove (522 a) on the arc surfaces.
6. The single-phase ground fault addressing device for the 10-kilovolt distribution line according to claim 1, characterized in that an electromagnetic spring clamping device (513) and an electromagnetic attraction positioning device (514) are respectively fixed to the upper end and the lower end of the side wall of the hollow fixed seat (511), the inner portion of the electromagnetic spring clamping device (513) penetrates through the shell of the hollow fixed seat (511) and is movably connected with a spring triangular ejector pin (513 a), the inner portion of the electromagnetic attraction positioning device (514) penetrates through the shell of the hollow fixed seat (511) and is connected with an electromagnet generation module (514 a) through a conducting wire, and the electromagnet generation module (514 a) is fixed on the inner bottom plate of the hollow fixed seat (511).
7. The single-phase ground fault addressing device for the 10 kv distribution line according to claim 1, wherein a protrusion (512 a) is vertically arranged on a side wall of the movable rod (512) far away from the folding connecting rod (524), the protrusion (512 a) is matched with and slidably connected with a sliding groove (511 a) arranged on the hollow fixed seat (511), an iron block (512 b) is arranged at the bottom of the protrusion (512 a), and the iron block (512 b) is embedded in a bottom shell of the movable rod (512).
8. The single-phase ground fault addressing device for the 10 kV distribution line according to claim 6, wherein a triangular clamping groove (512 c) is formed in one side, close to the actuator module (55), of the movable rod (512), the triangular clamping groove (512 c) is formed in a shell, close to the bottom, of the movable rod (512), and the triangular clamping groove (512 c) is matched with the spring triangular ejector pin (513 a) in size.
CN201911004375.4A 2019-10-22 2019-10-22 10 kilovolt distribution lines single-phase earth fault addressing device Pending CN110618352A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911004375.4A CN110618352A (en) 2019-10-22 2019-10-22 10 kilovolt distribution lines single-phase earth fault addressing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911004375.4A CN110618352A (en) 2019-10-22 2019-10-22 10 kilovolt distribution lines single-phase earth fault addressing device

Publications (1)

Publication Number Publication Date
CN110618352A true CN110618352A (en) 2019-12-27

Family

ID=68926336

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911004375.4A Pending CN110618352A (en) 2019-10-22 2019-10-22 10 kilovolt distribution lines single-phase earth fault addressing device

Country Status (1)

Country Link
CN (1) CN110618352A (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201413375Y (en) * 2009-04-03 2010-02-24 北京清畅电力技术股份有限公司 Line short circuit and ground fault indicator
CN201673234U (en) * 2010-05-26 2010-12-15 西安兴汇电力科技有限公司 Distribution line single-phase earth fault inspection device
CN102486220A (en) * 2010-12-06 2012-06-06 北京福生泉创科技有限公司 Mechanical structure of three-dimensional crank slide block
CN202886534U (en) * 2012-11-20 2013-04-17 山东电力集团公司 Flopping fault indicator
CN105115689A (en) * 2015-09-23 2015-12-02 中国航空工业集团公司沈阳飞机设计研究所 Pulse excitation apparatus
CN207448060U (en) * 2017-10-30 2018-06-05 贵州润柏吉科技有限公司 Lamp stand sanding apparatus
CN110018401A (en) * 2019-05-20 2019-07-16 国网甘肃省电力公司天水供电公司 A kind of distribution circuit single-phase earth fault localization method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201413375Y (en) * 2009-04-03 2010-02-24 北京清畅电力技术股份有限公司 Line short circuit and ground fault indicator
CN201673234U (en) * 2010-05-26 2010-12-15 西安兴汇电力科技有限公司 Distribution line single-phase earth fault inspection device
CN102486220A (en) * 2010-12-06 2012-06-06 北京福生泉创科技有限公司 Mechanical structure of three-dimensional crank slide block
CN202886534U (en) * 2012-11-20 2013-04-17 山东电力集团公司 Flopping fault indicator
CN105115689A (en) * 2015-09-23 2015-12-02 中国航空工业集团公司沈阳飞机设计研究所 Pulse excitation apparatus
CN207448060U (en) * 2017-10-30 2018-06-05 贵州润柏吉科技有限公司 Lamp stand sanding apparatus
CN110018401A (en) * 2019-05-20 2019-07-16 国网甘肃省电力公司天水供电公司 A kind of distribution circuit single-phase earth fault localization method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
好看视频: "曲柄滑块机构是如何工作的", 《HTTPS://HAOKAN.BAIDU.COM/V?VID=7231587332188780390&PD=BJH&FR=BJHAUTHOR&TYPE=VIDEO》 *

Similar Documents

Publication Publication Date Title
CN101430986B (en) Outdoor high-voltage permanent magnet type vacuum circuit breaker
CN201289816Y (en) Outdoor high-voltage permanent magnet type vacuum circuit breaker
CN107747672A (en) A kind of transformer station's O&M equipment secret position check device
CN110618352A (en) 10 kilovolt distribution lines single-phase earth fault addressing device
JP2013044556A (en) Watt-hour meter test device
CN208478995U (en) Overhaul of line breaker auxiliary device and overhaul of line breaker equipment
CN109143056B (en) Vibration online repair system of GIS equipment switch
CN209641125U (en) A kind of power cable simulation test device
CN106568701A (en) Disconnecting link online salt spray test apparatus
CN207050943U (en) A kind of socket durability detection device
CN203013554U (en) Divide-shut brake device and automatic change-over switching device
CN206161805U (en) Circuit breaker test fixture operating means
CN211237466U (en) High school physics electromagnetic induction presentation device
CN209709463U (en) A kind of distribution box convenient for line maintenance
CN204706211U (en) Operating mechanism secondary circuit failure searches instrument for training
CN210129667U (en) Control cabinet for electromechanical engineering
CN203325810U (en) Indoor electricity measurement and control module
CN208432694U (en) A kind of circuit board on-off detecting tool
CN105957777A (en) Residual-current circuit breaker with residual-current fault indication function
CN205248181U (en) Permanent magnetism of manual separating brake divides closing operation mechanism
CN206248751U (en) A kind of multi-functional boxcar of electric test
CN205157588U (en) Moulded case circuit -breaker inspection jig
CN205572411U (en) Magnetism winding of magnetic ball hinge robot
JP2546403Y2 (en) Operation tester for current limiter
CN105023489B (en) Power circuit Controlling model for electric power teaching

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
RJ01 Rejection of invention patent application after publication

Application publication date: 20191227

RJ01 Rejection of invention patent application after publication