CN202583303U - High-voltage bushing tap leakage current sampling device - Google Patents
High-voltage bushing tap leakage current sampling device Download PDFInfo
- Publication number
- CN202583303U CN202583303U CN2012202401972U CN201220240197U CN202583303U CN 202583303 U CN202583303 U CN 202583303U CN 2012202401972 U CN2012202401972 U CN 2012202401972U CN 201220240197 U CN201220240197 U CN 201220240197U CN 202583303 U CN202583303 U CN 202583303U
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- China
- Prior art keywords
- metal shell
- current sensor
- leakage current
- shell
- bushing tap
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- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a high-voltage bushing tap leakage current sampling device which comprises a metal shell, an electric current transducer, a front end contact device, a back end contact device and a top cover. The front end of the metal shell is provided with threads to be connected with a shell of a bushing tap. The back end of the metal shell is provided with threads to be connected with the top cover. The inner side of the metal shell is provided with the electric current transducer which is connected with a bushing tap metal rod through the front end contact device and is connected with the metal shell through the back end contact device. Measurement signals of the electric current transducer are led out through cable holes, and grounding wires are not needed. The high-voltage bushing tap leakage current sampling device is reliable in grounding and convenient to assemble and disassemble; and a bushing tap preventive test can be easily achieved. All matching surfaces are provided with seal grooves and seal rings, and good seal performance is guaranteed.
Description
Technical field
The utility model relates to a kind of current sampling device, particularly a kind of bushing end screen leakage current sampler.
Background technology
For even distribution electric field, sleeve pipe is made up of insulation course between the multi-disc metal screen, and the end screen is last screen, is used for being connected with the ground equipotential, and necessary reliable ground in service is untied during preventive trial so that measure the electric capacity of sleeve pipe and decreased with Jie.The sleeve pipe insulation line monitoring device need be measured leakage current from the end screen, and current sampling device one end is connected with end screen Metallic rod, and the other end is a ground wire, and ground wire is linked near the current sensor the sleeve pipe, ground connection then.But; Current sampling device should seal, contact reliable, otherwise will cause that sleeve pipe makes moist or explodes, but the on-the-spot installation procedure of existing current sampling device is more loaded down with trivial details; Inconvenient preventive trial mounting or dismounting; Sealing is relatively poor, particularly because there is long ground wire, so the reliability of ground connection is not high.
Summary of the invention
The utility model provides a kind of does not have ground wire, the leakage current sampling apparatus is shielded at ground connection end reliable, easy for installation, good seal, to overcome the prior art deficiency.
The technical scheme that the utility model adopted is: near the current sensor the sleeve pipe is embedded in the metal particle screen lid; Leakage current is through ground connection in metal particle screen lid immediately behind the current sensor; Need not ground wire, reduce end screen open circuit risk, and the projected current sensor signal lines is for measurement.
This device is made up of metal shell, current sensor, front end contact device, rear end contact device, top cover four parts.Metal shell one end is provided with screw thread and is connected with the end screen shell of ground connection, and the other end is provided with screw thread and is connected with top cover, and two mating surfaces of metal shell all have the O-ring seal completion to seal.Current sensor is equipped with in metal shell inside; Like core-theaded type current transformer, resistor, capacitor etc.; One end of current sensor is connected with end screen Metallic rod through the front end contact device, and the other end connects metal shell through the rear end contact device, accomplishes end screen ground connection.Top cover cooperates with the metal shell rear end through screw thread, accomplishes sealing.End screen leakage current grounding path is: end screen Metallic rod → front end contact device → current sensor → rear end contact device → metal shell → end screen shell.
And on metal shell, bore cable aperture, and the slotted line of current sensor is drawn, hermetically-sealed cable hole then, and measure interface in the installing of metal shell surface, be convenient to slotted line is linked into measurement mechanism.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Embodiment
As shown in Figure 1.In the screen shell 1 of end box thread 3 and Metallic rod 2 are arranged; Metal shell 6 one ends are designed with male thread 4 and cooperate with box thread 3; Mating surface has seal groove 5, and other end design box thread 8 cooperates with the male thread 9 of top cover 11, and mating surface has seal groove 10; Seal groove all is furnished with O-ring seal, guarantees the junction good seal.
Current sensor 13 is housed in the metal shell 6 is used for measuring end screen leakage current, the front end of current sensor 13 is connected with Metallic rod 2 through front end contactor 12.
Metal shell 6 inwalls are made the tapped hole of matching with shell wall set bolt 7, and current sensor 13 rear ends are screwed binding post, and are furnished with current sensor afterbody set bolt 17.Lead 18 two ends have the line nose, so that be separately fixed on shell wall set bolt 7 and the current sensor afterbody set bolt 17.The rear end contactor is made up of shell wall set bolt 7, current sensor afterbody set bolt 17, lead 18, and the rear end contactor is connected the rear end of current sensor 13 with metal shell 6.
Have cable aperture 16 on the shell wall of metal shell 6, draw, receive and measure on the interface 15, and use encapsulant shutoff cable aperture 16, guarantee good seal for the measuring-signal output line 14 of current sensor.
When preventive trial is shielded at the end, only need turn on top cover 11, turn on current sensor afterbody set bolt 17 then, make Metallic rod 2 and ground open circuit, can begin to test, recover reversed in order.
Claims (4)
1. the leakage current sampler is shielded at a bushing end; Comprise metal shell (6); It is characterized in that: the front end at metal shell (6) is provided with screw thread (4) to connect end screen shell (1); Be provided with screw thread (8) in the rear end of metal shell (6) to connect top cover (11), be provided with current sensor (13), the current sensor measurement signal is drawn through cable aperture (16) in the inboard of metal shell (6).
2. bushing according to claim 1 end screen leakage current sampler; It is characterized in that: the front end of current sensor (13) is connected with Metallic rod 2 through front end contactor 12, and the rear end of current sensor (13) is connected with metal shell (6) through the rear end contactor.
3. bushing according to claim 2 end screen leakage current sampler; It is characterized in that: the rear end contactor is made up of shell wall set bolt (7), current sensor afterbody set bolt (17), lead (18), and current sensor (13) is connected with metal shell (6).
4. bushing according to claim 1 end screen leakage current sampler; It is characterized in that: be provided with seal groove (5) at metal shell (6) front end mating surface; Mating surface at top cover (11) is provided with seal groove (10); Being used rubber seal, and use encapsulant shutoff cable aperture (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202401972U CN202583303U (en) | 2012-05-27 | 2012-05-27 | High-voltage bushing tap leakage current sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202401972U CN202583303U (en) | 2012-05-27 | 2012-05-27 | High-voltage bushing tap leakage current sampling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202583303U true CN202583303U (en) | 2012-12-05 |
Family
ID=47252704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202401972U Expired - Fee Related CN202583303U (en) | 2012-05-27 | 2012-05-27 | High-voltage bushing tap leakage current sampling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202583303U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105137152A (en) * | 2015-08-21 | 2015-12-09 | 华北电力大学 | Ground lead current signal monitoring sensor for end screen of transformer bushing |
-
2012
- 2012-05-27 CN CN2012202401972U patent/CN202583303U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105137152A (en) * | 2015-08-21 | 2015-12-09 | 华北电力大学 | Ground lead current signal monitoring sensor for end screen of transformer bushing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20140527 |