CN210222122U - Ground wire device for circuit insulation test - Google Patents
Ground wire device for circuit insulation test Download PDFInfo
- Publication number
- CN210222122U CN210222122U CN201920834426.5U CN201920834426U CN210222122U CN 210222122 U CN210222122 U CN 210222122U CN 201920834426 U CN201920834426 U CN 201920834426U CN 210222122 U CN210222122 U CN 210222122U
- Authority
- CN
- China
- Prior art keywords
- wire
- operating
- grounding
- clamp
- bolt
- 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
Images
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
The utility model discloses an experimental earth connection device that uses of circuit insulation test aims at providing the experimental earth connection device that uses of circuit insulation test that can improve the operating efficiency. The grounding device comprises a wire end clamp for clamping a wire during operation, a grounding operation rod connected with the wire end clamp, a grounding end clamp for clamping a grounding body during operation, an operation bolt arranged on the grounding end clamp, and a short circuit wire, wherein two ends of the short circuit wire are respectively connected with the wire end clamp and the grounding end clamp; the testing device also comprises a butterfly bolt which is screwed on the grounding terminal wire clamp in a threaded manner and is used for connecting a testing wire of the insulation megger, an operating head which is clamped with an operating bolt on the grounding terminal wire clamp, and an operating rod which is fixedly connected with the operating head; a pin rod is arranged at one end of the operating bolt, which is connected with the operating head, and the pin rod and the operating bolt form a cross shape; one end that the operating head is connected with the operating bolt sets up the blind hole that supplies the handle rod tip to stretch into, and sets up a set of J-shaped, be used for supplying the spacing groove that the pin rod card is gone into on the blind hole outer wall.
Description
Technical Field
The utility model belongs to the technical field of the power maintenance equipment technique and specifically relates to a circuit insulation test is experimental with earth connection device is related to.
Background
The line insulation resistance test is the work which is carried out by the line conventionally, and is carried out on 10kV to 110kV lines in particular. Before a newly-built line is put into operation, after complex maintenance, before and after a withstand voltage test or after a fault, when a fault point is difficult to find, and the like, the insulation resistance test work of the line needs to be carried out. Because the work of the circuit insulation test is relatively simple, the degree of attention of people to the normative of the work is often covered by the test result, and the attention is not easy to be attracted. The operation time is long, and part operation process is nonstandard, forms habitual violating regulations, easily causes danger such as the people is wounded to the response electricity, even electrocutes. The conventional line insulation resistance test method is analyzed as follows:
(1) line insulation resistance test before commissioning and after complex maintenance of newly-built line
Before the new line is put into operation and after complex maintenance, the line is in a maintenance state when the insulation resistance of the line is tested. When testing the first phase, the installation of the test line can be completed under the line repairing state, and the line is switched to the cold standby state during the test. When the test line is dismantled and the next test line is installed, a tester needs to perform 5 times of line maintenance and then cold standby, about 3 hours of time is consumed, and in order to shorten the operation time, the illegal condition that the test line is directly dismantled and installed 5 times in a line cold standby state exists. The illegal behavior exposes the operating personnel to the risks of induction electricity and sudden electric shock of the tested line, and is easy to cause the dangers of induction electricity and even electric shock and the like. According to the method, the risk of electric injury is reduced, the three-phase test wire can be assembled and disassembled at the same time, but three times of materials including an insulation megger need to be carried, which is difficult to achieve, and the interphase insulation test work cannot be carried out. This forms the motivation and behavior for a habitual violation.
(2) Post line fault insulation resistance test
After the line fault trips, the reclosing is unsuccessful or not, the line cannot be normally put into operation, power supply is interrupted, and most line operation and maintenance personnel perform inspection and check at the point of suspected fault at the first time according to experience, line operation conditions or known information. If no fault point is found, the general line is long, when the range of the fault point is difficult to be determined, the line is often applied for standby cooling, an insulation resistance test method is adopted to judge and search the fault point, and when the line has a permanent fault, the line is required to be untied and divided into multiple sections for line insulation resistance test. Due to the pressure from power supply, customer service, line availability factor and the like, an operator is specially patrolled outside, part of the operators do not handle a work order and change to overhaul during the insulation resistance test, the operation rod is used for lapping a test line after the line is tested in a cold standby state, if an electromagnetic voltage transformer is connected to the tested line in an dead state or the line needs to test the insulation resistance in a segmented manner, the electromagnetic voltage transformer and a strain drainage line are removed, even an insulator and other elements are removed for inspection, and the conditions that the operator is induced by the tested line and is injured by sudden incoming calls exist in the operation processes; and after the permanent fault line is broken or the wire is hung on the next voltage level line after the wire is disconnected, the test line is not overhauled, so that the danger that the person is injured by induced electricity or even an electric shock is easily caused under the risk that the person is injured by the operation voltage of the hung line on the tested line. And are prone to form habitual violation behaviors and motivations.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a purpose aims at overcoming the not enough of prior art existence, provides a can effectively improve the experimental earth connection device of using of circuit insulation test of operation safety.
In order to solve the technical problem, the utility model discloses a realize through following technical scheme:
a grounding wire device for a circuit insulation test comprises a wire end clamp for clamping a wire during operation, a grounding operating rod connected with the wire end clamp, a grounding end clamp for clamping a grounding body during operation and provided with an operating bolt, and a short circuit wire of which two ends are respectively connected with the wire end clamp and the grounding end clamp; the testing device also comprises a butterfly bolt which is screwed on the grounding terminal wire clamp in a threaded manner and is used for connecting a testing wire of the insulation megger, an operating head which is clamped with an operating bolt on the grounding terminal wire clamp, and an operating rod which is fixedly connected with the operating head; a pin rod is arranged at one end of the operating bolt, which is connected with the operating head, and the pin rod and the operating bolt form a cross shape; one end that the operating head is connected with the operating bolt sets up the blind hole that supplies the handle rod tip to stretch into, and sets up a set of J-shaped, be used for supplying the spacing groove that the pin rod card is gone into on the blind hole outer wall.
Preferably, the operating head is connected with the operating bolt of the grounding terminal clamp through a J-shaped blind hole structure.
Preferably, the operating head is connected to the operating rod by a screw structure.
Preferably, the short-circuit line is a short-circuit line having a thickened transparent insulating layer.
Compared with the prior art, the utility model has the advantages of as follows:
the utility model discloses can reduce the risk of line insulation resistance test operation, effectively improve line insulation resistance test operation security, standardization and operating efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of the present invention in use.
Fig. 2 is a schematic structural diagram of the operating head in fig. 1.
Fig. 3 is a schematic structural view of the grounding terminal clamp in fig. 1.
In the figure: the device comprises a lead 1, a lead end clamp 2, a pin rod 3, a blind hole 4, a grounding operating rod 5, a short circuit line 6, a grounding body 7, a grounding end clamp 8, a butterfly bolt 9, an operating bolt 10, an operating head 11, a limiting groove 12, a test line 13, an insulation megger 14 and an operating rod 15.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention. In the following description, for the sake of clarity of illustrating the structure and operation of the present invention, reference will be made to the accompanying drawings by means of directional terms, but the terms "front", "rear", "left", "right", "up", "down", etc. should be construed as convenient terms and not as limitative terms.
The grounding wire device for the line insulation test shown in fig. 1-3 comprises a wire end clamp for clamping a wire during operation, a grounding operating rod connected with the wire end clamp, a grounding end clamp for clamping a grounding body during operation and provided with an operating bolt, and a short-circuit wire with two ends respectively connected with the wire end clamp and the grounding end clamp; the testing device also comprises a butterfly bolt which is screwed on the grounding terminal wire clamp in a threaded manner and is used for connecting a testing wire of the insulation megger, an operating head which is clamped with an operating bolt on the grounding terminal wire clamp, and an operating rod which is fixedly connected with the operating head; a pin rod is arranged at one end of the operating bolt, which is connected with the operating head, and the pin rod and the operating bolt form a cross shape; one end that the operating head is connected with the operating bolt sets up the blind hole that supplies the handle rod tip to stretch into, and sets up a set of J-shaped, be used for supplying the spacing groove that the pin rod card is gone into on the blind hole outer wall.
In order to facilitate the disassembly, the assembly and the maintenance and save the operating rod, the operating head is connected with the operating rod through a thread structure, and obviously, the operating head can also be connected in a clamping way and the like. The operating head is connected with an operating bolt of a ground terminal wire clamp through a J-shaped blind hole structure.
In order to be convenient to carry, the operating rod is formed by connecting two sections of rod bodies and can be connected in a threaded connection mode or a clamping connection mode and the like. Obviously, the number of segments of the operating rod can be increased according to the actual requirement, such as three segments.
The operating rod, the operating head and the grounding end wire clamp are very convenient and fast to assemble and disassemble, the operating head and the pin rod are only required to be butted in place during assembly and then rotate by a certain angle, and the operating head can be separated from the pin rod by reversely rotating the operating head through the operating rod after being disassembled, so that the grounding end wire clamp is flexibly separated and connected, and the requirement of testing the grounding end is met. The disk bolt is M8 in model number and is used for effectively fixing the insulated megger test wire and avoiding the insulated megger test wire from falling off when the grounding terminal wire clamp is assembled and disassembled. On the basis that the short circuit line meets the technical standard of portable short circuit grounding wire, the transparent insulating layer is reinforced, the thickness is increased to 1.2mm, and the insulating resistance of the short circuit line is more than 100M omega.
The utility model discloses can work as conventional earth connection normal use completely, not increase simultaneously and drop into basically, need not repeated configuration conventional earth connection behind the configuration this earth connection device.
Adopt the utility model discloses carry out circuit insulation test process as follows:
(1) and (4) converting the line into a cold standby state, and pulling open the electromagnetic voltage transformer and the secondary side air switch of the voltage transformer which can be isolated by operation.
(2) And (4) eliminating strain drainage wires, electromagnetic voltage transformer drainage wires and the like which need to be eliminated in the insulation resistance test.
(3) ① installing a group of grounding wire devices for test on the A phase wire after testing electricity at the line insulation resistance test point, ② connecting the test wire, connecting the test wire test connection end to the butterfly bolt of the grounding terminal wire clamp, using the grounding short circuit wire as the test wire connected to the line wire, as shown in figure 1, connecting other test wires, ③ disconnecting the grounding terminal wire clamp from the grounding body by using the operating rod and suspending, ④ testing the line insulation resistance, ⑤ recovering the grounding terminal wire clamp with the test wire by using the operating rod, detaching the test wire, ⑥ repeating ② - ⑤ testing B, C phase wire, detaching the grounding wire device by using the 36 ⑦ and cleaning the site.
(4) ① sets a group of grounding wire devices for test at two ends of the drainage wire of the subsection point of the drainage wire to be disconnected, ② disconnects the drainage wire, ③ repeats ② - ⑥ in the step (3), the insulation resistance of each section of the wire after the subsection is tested, ④ recovers the disconnected drainage wire, ⑤ removes the grounding wire devices and cleans the site.
(5) ①, installing a group of grounding wire devices for testing on the line conductor at the position where the electromagnetic voltage transformer needs to be untied, installing a group of grounding wire devices on the electromagnetic voltage transformer, ② removing the drainage wire of the electromagnetic voltage transformer, ③ repeating ② - ⑥ in (3), testing the line insulation resistance, ④ recovering the untied drainage wire of the voltage transformer, ⑤ removing the grounding wire devices, and cleaning the site.
Before the circuit tests the insulation resistance, the circuit applies for a licensor to stop all work on the circuit, and the circuit is switched to cold standby. The grounding of the line required during the operation of connecting and disconnecting the test wire and disconnecting and restoring the relevant drainage wire is realized by independently selecting a position for electricity testing by an operator and installing a grounding wire device. The protection device meets the requirement that the operating personnel should operate in the protection range of the grounding wire in 'electric power safety work regulations of the Limited liability company of the power grid in south China'. The power failure maintenance operation is forbidden under the condition that no grounding wire or a grounding wire is not completely installed. "requirement. After the permanent fault line is broken or the wire is hung on the next voltage level line after the wire is disconnected, the test line is not overhauled, so that the risk of hurting people and the violation of regulations caused by the operation voltage of the hung line on the tested line is controlled.
The working responsible person manages the state of the line for maintenance, the operating rod for testing is used for disconnecting the grounding end wire clamp of the grounding wire for test connected with the test wire from the ground and suspending the grounding end wire clamp and recovering the grounding end wire clamp of the grounding wire for test with the test wire, the split-phase grounding wire is converted into the test wire by disconnecting the grounding end wire clamp from the grounding lifting body by the maintenance grounding wire, the grounding of the grounding end wire clamp of the grounding wire is recovered, the test wire is converted into the process of maintaining the grounding wire, and the operation process of state conversion of the line for 6 times is. The operation of repeating 6 state transitions on the line requires at least 3 hours per time, and the test is carried out for less than 10 minutes, and the whole test process is carried out for less than 30 minutes according to a new flow. The effective working time can be shortened from at least 3.5 hours to 0.5 hour every time the line insulation resistance is tested. The operation amount of 6 times of line state transition and the waiting time for waiting the line state transition are reduced, the motivation and action of the habitual violation are effectively avoided, and the habitual violation of the line cold standby state operation is avoided.
The utility model discloses replaced some test wire with the earth connection device, installed the earth connection device and just also replaced and connected some test wire, the operation personnel just can not lazily connect the earth connection device not. The habitual regulation violation that the test wire is connected and removed and the drainage wire is removed and recovered without installing a ground wire device is avoided, and meanwhile, the main electric injury risk of the line insulation test is controlled.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A grounding wire device for a circuit insulation test comprises a wire end clamp for clamping a wire during operation, a grounding operating rod connected with the wire end clamp, a grounding end clamp for clamping a grounding body during operation and provided with an operating bolt, and a short circuit wire of which two ends are respectively connected with the wire end clamp and the grounding end clamp; the method is characterized in that: the testing device also comprises a butterfly bolt which is screwed on the grounding terminal wire clamp in a threaded manner and is used for connecting a testing wire of the insulation megger, an operating head which is clamped with an operating bolt on the grounding terminal wire clamp, and an operating rod which is fixedly connected with the operating head; a pin rod is arranged at one end of the operating bolt, which is connected with the operating head, and the pin rod and the operating bolt form a cross shape; one end that the operating head is connected with the operating bolt sets up the blind hole that supplies the handle rod tip to stretch into, and sets up a set of J-shaped, be used for supplying the spacing groove that the pin rod card is gone into on the blind hole outer wall.
2. The ground wire device for the line insulation test according to claim 1, characterized in that: the operating head is connected with an operating bolt of a ground terminal wire clamp through a J-shaped blind hole structure.
3. The ground wire device for the line insulation test according to claim 1, characterized in that: the operating head is connected with the operating rod through a thread structure.
4. The ground wire device for the line insulation test according to claim 1, characterized in that: the short circuit line adopts a short circuit line with a thickened transparent insulating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920834426.5U CN210222122U (en) | 2019-06-04 | 2019-06-04 | Ground wire device for circuit insulation test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920834426.5U CN210222122U (en) | 2019-06-04 | 2019-06-04 | Ground wire device for circuit insulation test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210222122U true CN210222122U (en) | 2020-03-31 |
Family
ID=69929719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920834426.5U Active CN210222122U (en) | 2019-06-04 | 2019-06-04 | Ground wire device for circuit insulation test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210222122U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108944A (en) * | 2019-06-04 | 2019-08-09 | 云南电网有限责任公司德宏供电局 | A kind of line insulation test grounding wire device and its line insulation test method |
| CN111584266A (en) * | 2020-06-19 | 2020-08-25 | 国网江苏省电力有限公司常州供电分公司 | Magnetic attraction guide type insulating operating rod |
-
2019
- 2019-06-04 CN CN201920834426.5U patent/CN210222122U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108944A (en) * | 2019-06-04 | 2019-08-09 | 云南电网有限责任公司德宏供电局 | A kind of line insulation test grounding wire device and its line insulation test method |
| CN111584266A (en) * | 2020-06-19 | 2020-08-25 | 国网江苏省电力有限公司常州供电分公司 | Magnetic attraction guide type insulating operating rod |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210222122U (en) | Ground wire device for circuit insulation test | |
| CN112731210B (en) | Main transformer electrical preventive test method without dismantling high-voltage side GIS | |
| CN201608064U (en) | 10kV multifunctional operating rod | |
| CN101907675B (en) | Method for finding out fault of distribution network circuit | |
| CN201497774U (en) | Lightning-stroke protection and monitoring device with discharge electrode and discharge counter for ten-kilovolt circuit | |
| CN202231361U (en) | 10kV multifunctional safe tool | |
| CN103001141A (en) | Method for mounting anti-waving spacers on 66-kilovolt power transmission hot-line | |
| CN110289574B (en) | Multifunctional J-shaped line clamping and assembling and disassembling tool for 10kV insulating rod operation method | |
| CN201398034Y (en) | Electroscopy grounding device | |
| CN205753300U (en) | 10kV distribution line lightning protection earthing device | |
| CN203690803U (en) | Backup protection device for live replacement of power transmission line tension insulator | |
| CN204481356U (en) | A kind of fast moving distribution integrated apparatus | |
| CN210693413U (en) | High-strength core rod type lightning arrester with visible fracture | |
| CN208862536U (en) | Fault isolation device under drawing for 10kV cable | |
| CN202424088U (en) | Socket spanner special for charged installation of arrester in ground potential | |
| CN203166397U (en) | Circuit structure for eliminating induction voltage | |
| CN204008726U (en) | Insulators on HVDC Transmission Line live testing device loop bracket | |
| CN106019022B (en) | Cover plate test device for connecting gas chamber between oil-gas type transformer and GIS and operation method | |
| CN206461289U (en) | A kind of clamp for being used to fix high-pressure inflating cabinet sleeve pipe | |
| CN217507943U (en) | Main transformer loop incoming line structure based on 3/2 circuit breaker wiring | |
| CN220510604U (en) | Distribution network JP cabinet back end circuit operation and maintenance inter-connection ground switch | |
| CN111077475A (en) | Low-voltage line ground fault indicator | |
| CN110600311A (en) | Outdoor earthing knife switch | |
| CN209515540U (en) | A kind of horizontal retractable ice-melt fracture isolating switch structure | |
| CN211103788U (en) | Vacuum switch energy storage spring mounting and dismounting tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |