CN203166320U - Wall bushing tap grounding device - Google Patents
Wall bushing tap grounding device Download PDFInfo
- Publication number
- CN203166320U CN203166320U CN 201220587963 CN201220587963U CN203166320U CN 203166320 U CN203166320 U CN 203166320U CN 201220587963 CN201220587963 CN 201220587963 CN 201220587963 U CN201220587963 U CN 201220587963U CN 203166320 U CN203166320 U CN 203166320U
- Authority
- CN
- China
- Prior art keywords
- grounding
- end screen
- wall bushing
- screw rod
- grounding screw
- 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.)
- Expired - Fee Related
Links
- 238000009413 insulation Methods 0.000 claims abstract description 21
- 238000012544 monitoring process Methods 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 6
- 229910052573 porcelain Inorganic materials 0.000 claims abstract description 6
- 239000004020 conductor Substances 0.000 claims description 11
- 125000006850 spacer group Chemical group 0.000 claims description 11
- 230000015556 catabolic process Effects 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000009666 routine test Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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Abstract
The utility model relates to a wall bushing tap grounding device. The wall bushing tap grounding device comprises a tap grounding screw, an insulation porcelain bushing which is used for insulating the tap grounding screw and a flange, a grounding cover body which is arranged on the tap grounding screw, and a nut which fixes the grounding cover body on the tap grounding screw. An insulation gasket is arranged between the grounding cover body and the flange. The tap grounding screw is connected with a grounding downlead. The grounding downlead is connected with a separable insulation online monitoring current meter. The tail end of the insulation online monitoring current meter is reliably grounding. A tap grounding wire is led down, and a test worker can carry out convenient untying and test. In an operation state, the test worker can carry out bushing capacitance and current detection and monitors bushing main insulation in real time, so as to realize state detection and state maintenance.
Description
Technical field
The utility model relates to wall bushing end screen earthing device in a kind of electric power system.
Background technology
The 110kV of 110kV transformer station inlet wire and main transformer wall bushing end screen earthing mode as shown in Figure 1 at present, it comprises end screen grounding screw rod 1, be used for the end shield grounding screw rod 1 and flange 10 insulation insulated porcelain sleeve 2, be installed in ground connection lid 3 on the screen grounding screw rod 1 of end, ground connection lid 3 be fixed on nut 4 on the screen grounding screw rod 1 of end, under the running status, ground connection lid 3 is fixedly connected with flange 10, end screen reliable ground.When needs carry out routine test, maintainer's need are climbed near the bottom shielding of bushing by insulating ladder, untie the nut 4 on the screen of end, make ground connection lid 3 break away from flange 10 and be connected, be convenient to use the positive connection of dielectric loss electric bridge that capacitance of bushing amount and dielectric loss tangent value are tested.Because whole sleeve pipe is very high, there is not inspection platform again, therefore near the operation that the staff arrives the bottom shielding of bushing and the nut that is fixed is untied is very difficult, workload is very big, and insulating ladder is big and heavy, and inner being difficult to carried in electric substation, and when establishing insulating ladder, exist and to topple over danger, jeopardize personnel and electric equipment safety on every side.
The utility model content
The utility model purpose is that a kind of test, earthing device that can detect the capacitance of bushing electric current in real time under running status be convenient to when routine test is provided in order to overcome the deficiencies in the prior art.
For achieving the above object, the technical solution adopted in the utility model is: a kind of wall bushing end screen earthing device, it comprises end screen grounding screw rod, be used for the end is shielded the insulated porcelain sleeve of grounding screw rod and flange insulation, be installed in the ground connection lid on the screen grounding screw rod of end, the ground connection lid is fixed on the last nut that shields on the grounding screw rod, between described ground connection lid and flange, be provided with insulation spacer, the screen grounding screw rod is connected with down conductor at the end, described down conductor is connected with separable insulated on-line monitoring ammeter, the terminal reliable ground of described insulated on-line monitoring ammeter.
The further conversion that technique scheme is adopted and being optimized for:
Described insulation spacer is made by the material that can puncture.The puncture voltage of the insulation spacer that adopts can reach 2000V, and is when down conductor ruptures, not breakdown with protective casing end screen.
The thickness of described insulation spacer is 2-4mm.
Described insulated on-line monitoring ammeter also is parallel with for the protection of described ammeter not breakdown many groups piezo-resistance when the high frequency overvoltage.
First indicator light that whether series connection one normally moves for detection of end screen grounded circuit on the described on-line monitoring electric current.
Also connect one for showing the second whether breakdown indicator light of piezo-resistance on the circuit that the described piezo-resistance of many groups is formed.
Because technique scheme is used, the utility model compared with prior art has following advantage: the utility model draws down by the end being shielded earth connection, testing crew is convenient to untie and is tested, simultaneously under running status, it can carry out the capacitance of bushing current detecting, sleeve pipe main insulation is monitored in real time, thereby realize state-detection and repair based on condition of component.
Description of drawings
Accompanying drawing 1 is existing bottom shielding of bushing earthing device schematic diagram;
Accompanying drawing 2 is the utility model bottom shielding of bushing earthing device schematic diagram;
Wherein: 1, end screen grounding screw rod; 2, insulated porcelain sleeve; 3, ground connection lid; 4, nut; 5, insulation spacer; 6, down conductor; 7, on-line monitoring ammeter; 8, piezo-resistance; 91, first indicator light; 92, second indicator light; 10, flange.
Embodiment
Below in conjunction with accompanying drawing the utility model preferred embodiment is elaborated:
Wall bushing end screen earthing device as shown in Figure 2, it comprises end screen grounding screw rod 1, be used for the end is shielded insulated porcelain sleeve 2 that grounding screw rod 1 and metal flange 10 insulate mutually, is installed in ground connection lid 3 on the screen grounding screw rod 1 of end, ground connection lid 3 is fixed on the last nut 4 that shields on the grounding screw rod 1, between ground connection lid 3 and flange 10, be provided with insulation spacer 5, flange 10 ground connection.End screen down conductor 6 is drawn from the top of end screen grounding screw rod 1, and down conductor 6 is connected with separable on-line monitoring ammeter 7, ammeter 7 terminal reliable grounds, thus make end screen reliable ground.
Particularly, insulation spacer 5 thickness are 2-4mm.It is made by the material that can puncture, and puncture voltage when down conductor 6 fractures, can be shielded not breakdown in the protective casing end up to 2000V.
When the high frequency overvoltage, not breakdown for protection on-line monitoring ammeter 7, be arranged in parallel many group piezo-resistances 8 with on-line monitoring ammeter 7, in the present embodiment, three groups of pressure-sensitive circuit parallel branches are set.
In order can whether normally moving running status end screen grounded circuit reflection intuitively to be arranged, in the present embodiment, also to be in series with first indicator light 91 on the on-line monitoring ammeter 7.Simultaneously, be the further operating state of understanding piezo-resistance 8, on the circuit that many group piezo-resistances 8 are formed, also connect one for showing the second whether breakdown indicator light 92 of piezo-resistance.
Above-mentioned the utility model end screen earthing device structure is illustrated, below its operation principle is done brief description:
In the bushing normal course of operation, down conductor 6 is in series with online detection ammeter 7 and is connected back ground connection, the piezo-resistances 8 of organizing of its parallel connection simultaneously more, this kind set-up mode is under the prerequisite that guarantees end screen reliable ground, can also detect in real time the capacitance of bushing electric current, thereby sleeve pipe main insulation is monitored.When overvoltage, because the setting of insulation spacer and piezo-resistance can realize effective protection.
When regular maintenance, only need to remove down conductor and can test sleeve pipe with being connected of on-line monitoring ammeter, need not to ascend a height and carry out the dismounting of end screen ground connection, greatly reduce task difficulty, improved production efficiency, guarantee operating personnel's safety.
Above-described embodiment only is explanation technical conceive of the present utility model and characteristics; its purpose is to allow the personage who is familiar with this technology can understand content of the present utility model and enforcement according to this; can not limit protection range of the present utility model with this; all equivalences of doing according to the utility model spirit essence change or modify, and all should be encompassed within the protection range of the present utility model.
Claims (6)
1. earthing device is shielded at a wall bushing end, it comprises end screen grounding screw rod (1), be used for the end is shielded the insulated porcelain sleeve (2) of grounding screw rod (1) and flange (10) insulation, be installed in the ground connection lid (3) on the end screen grounding screw rod (1), ground connection lid (3) is fixed on the last nut (4) that shields on the grounding screw rod (1), it is characterized in that: between described ground connection lid (3) and flange (10), be provided with insulation spacer (5), be connected with down conductor (6) at end screen grounding screw rod (1), described down conductor (6) is connected with separable insulated on-line monitoring ammeter (7), the terminal reliable ground of described insulated on-line monitoring ammeter (7).
2. wall bushing according to claim 1 end screen earthing device, it is characterized in that: described insulation spacer (5) is made by the material that can puncture.
3. wall bushing according to claim 1 end screen earthing device, it is characterized in that: the thickness of described insulation spacer (5) is 2-4mm.
4. according to any wall bushing of claim 1 to 3 end screen earthing device, it is characterized in that: described insulated on-line monitoring ammeter (7) also is parallel with for the protection of described ammeter not breakdown many groups piezo-resistance (8) when the high frequency overvoltage.
5. wall bushing according to claim 4 end screen earthing device is characterized in that: whether normally described on-line monitoring electric current (7) goes up series connection one for detection of end screen grounded circuit first indicator light (91) of operation.
6. wall bushing according to claim 4 end screen earthing device is characterized in that: organizing also connects on the circuit that described piezo-resistance (8) forms more one is used for showing whether breakdown second indicator light (92) of piezo-resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220587963 CN203166320U (en) | 2012-11-09 | 2012-11-09 | Wall bushing tap grounding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220587963 CN203166320U (en) | 2012-11-09 | 2012-11-09 | Wall bushing tap grounding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203166320U true CN203166320U (en) | 2013-08-28 |
Family
ID=49027480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220587963 Expired - Fee Related CN203166320U (en) | 2012-11-09 | 2012-11-09 | Wall bushing tap grounding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203166320U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558446A (en) * | 2013-11-22 | 2014-02-05 | 国家电网公司 | Overvoltage on-line monitoring system |
| CN107478969A (en) * | 2017-08-08 | 2017-12-15 | 江苏智达高压电气有限公司 | A kind of gas insulated bushing end shield structure |
-
2012
- 2012-11-09 CN CN 201220587963 patent/CN203166320U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558446A (en) * | 2013-11-22 | 2014-02-05 | 国家电网公司 | Overvoltage on-line monitoring system |
| CN107478969A (en) * | 2017-08-08 | 2017-12-15 | 江苏智达高压电气有限公司 | A kind of gas insulated bushing end shield structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130828 Termination date: 20191109 |