CN203166320U - Wall bushing tap grounding device - Google Patents

Wall bushing tap grounding device Download PDF

Info

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
Application number
CN 201220587963
Other languages
Chinese (zh)
Inventor
侍海军
徐青龙
张平
张曦
徐建波
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.)
State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Suzhou Power Supply Co Ltd of Jiangsu Electric Power Co
Original Assignee
State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Suzhou Power Supply Co Ltd of Jiangsu Electric Power Co
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 State Grid Corp of China SGCC, State Grid Jiangsu Electric Power Co Ltd, Suzhou Power Supply Co Ltd of Jiangsu Electric Power Co filed Critical State Grid Corp of China SGCC
Priority to CN 201220587963 priority Critical patent/CN203166320U/en
Application granted granted Critical
Publication of CN203166320U publication Critical patent/CN203166320U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Insulators (AREA)

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

Wall bushing end screen earthing device
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.
CN 201220587963 2012-11-09 2012-11-09 Wall bushing tap grounding device Expired - Fee Related CN203166320U (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
CN109633384A (en) A kind of Intelligent insulating line thunder protection on-Line Monitor Device and method
CN106556753B (en) A kind of divider fault monitoring device
CN205749647U (en) Monitoring system for railway outdoor trackside signalling arrangement
CN102901894A (en) Test method and device for testing 500kV zinc oxide arrester
CN204649859U (en) A kind of transmission line of electricity over-voltage measurement analogue test platform
CN203166320U (en) Wall bushing tap grounding device
CN202221437U (en) Special-purpose test tool for electrified lightning arrester
CN102221652A (en) Method and device for testing 500kV metal oxide arrester
CN201413879Y (en) Special leading wire for test of lightning arrester of power transmission cable pole tower
CN203502546U (en) GIS partial discharging on-line monitoring device
CN105846330A (en) Special assorted tool for changing leakage current meter of lightning arrester in live-working state and working method
CN203232124U (en) Grounding state alarm device for transformer bushing tap
CN205693210U (en) For spark gap charged for replacement leakage current table special complete instrument
CN204101638U (en) A kind of 110kV combined type Zinc-Oxide Arrester does not remove high-voltage connection preventive trial connection circuit
CN104188238A (en) High-voltage early-warning insulation boot
CN202837440U (en) Testing apparatus for testing 500 kV zinc oxide arrester
CN204228889U (en) Single-core high-voltage cable screen armour ground connection on-line intelligence monitoring system
CN204228900U (en) A kind of local discharge signal harvester
CN103197127A (en) Grounding step voltage detecting method and grounding step voltage detecting device of high-voltage equipment of switch gear room of converting station
CN203204108U (en) Current comparison module used for monitoring defects of secondary circuit of current transformer in power system
CN208399621U (en) A kind of partial pressure type electric detonation tube detection device
CN209148844U (en) A kind of high-voltage circuitbreaker test short jumper device
CN203250629U (en) Mutual inductor secondary winding connection box
CN202210133U (en) Heat-engine plant and high voltage plant electricity insulation monitoring system
CN203232060U (en) Insulation rod test wire connector

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