CN202256571U - Leakage current signal lead-out device of power transformer sleeve for online monitoring - Google Patents
Leakage current signal lead-out device of power transformer sleeve for online monitoring Download PDFInfo
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- CN202256571U CN202256571U CN2011204234132U CN201120423413U CN202256571U CN 202256571 U CN202256571 U CN 202256571U CN 2011204234132 U CN2011204234132 U CN 2011204234132U CN 201120423413 U CN201120423413 U CN 201120423413U CN 202256571 U CN202256571 U CN 202256571U
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- conducting rod
- insulating
- current signal
- leading
- power transformer
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 29
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 24
- 239000010935 stainless steel Substances 0.000 claims abstract description 24
- 238000009413 insulation Methods 0.000 claims abstract description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052802 copper Inorganic materials 0.000 claims abstract description 15
- 239000010949 copper Substances 0.000 claims abstract description 15
- 210000003168 insulating cell Anatomy 0.000 claims description 15
- 239000004593 Epoxy Substances 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000012806 monitoring device Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 239000010953 base metal Substances 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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Abstract
The utility model discloses a leakage current signal leading-out device of a power transformer sleeve for online monitoring, belonging to the application field of power transformers implementing an online monitoring technology. The leakage current signal leading-out device comprises a conducting rod, an insulating sleeve and an insulating gasket, wherein the leading-in end of the conducting rod is connected with a copper bar at the output end of a bushing tap, a leading-out end of the conducting rod is earthed after being connected with a current transformer through a leading-out cable, and the current transformer is secondarily output to an online monitoring device; the insulating sleeve is sleeved outside the conducting rod, the insulating gasket is arranged between the leading-out end of the conducting rod and the bottom of a stainless steel sleeve assembly, and the insulating sleeve and the insulating gasket form a sealed insulating space. In the utility model, a leakage current signal of the power transformer sleeve is led out through the conducting rod, thus, the requirement of the sleeve implementing online monitoring is met, the copper conducting rod is in sufficient insulation with the assembly, the reliability for the output of the leakage current signal of the sleeve is ensured, and the device is simple in structure, easy to manufacture and low in production cost.
Description
Technical field
The utility model belongs to power transformer and implements the on-line monitoring technique application; More particularly; Relating to the power transformer casing leak current signal ejector that a kind of on-line monitoring is used, is that intelligent grid digital transformer substation power transformer is carried out the process modification technology in the implementation process of on-line monitoring field.
Background technology
Power transformer is the hinge equipment of electric system, and its reliability of operation is directly connected to the safety and stablization of electric system, and sleeve pipe is one of nucleus equipment of transformer, and the quality of its state directly has influence on the safe operation of electrical network.Therefore, it is imperative power transformer to be carried out on-line monitoring.
According to State Grid Corporation of China, the unified strong intelligent grid planning of Southern Power Grid Company construction; The digital transformer substation construction is the important component part of strong intelligent grid; And the high voltage electric power equip ment on-line monitoring is the basis of digital transformer substation; The power transformer sleeve pipe of unit operations such as national grid, south electric network mainly contains production firms such as ABB, MWB, Reynolds that, west, Xi'an electroceramics company at present, and the market share is more than 80%, without exception; The bushing shell for transformer earthing device of above-mentioned manufacturers produce all adopts the frame mode of built-in closed and external closed ground connection; Wherein, external is through external ground device ground connection, and end screen ground outlet is passed little insulator and drawn through stem (screw rod); The stem insulation against ground, outside through grounded metal in flakes or grounded metal flexible cord, grounded metal coupling arrangement etc. link to each other with ground connection position base metal; Built-in through ground connection lid, ground connection cap ground connection, end screen ground outlet is passed little insulator and is drawn through stem, the stem insulation against ground, and outer covering metal ground connection lid of stem or ground connection cap, stem links to each other with the ground connection lid, and ground connection is covered direct ground connection.Yet; These present power transformer sleeve pipes all are directly grounded in the transformer operational process; The sleeve pipe earthing device outward appearance of each manufacturer, structure are different, and installation dimension is not of uniform size, can't end screen leakage current signal be provided for the on-line monitoring system sampling detector; And a lot of electrical network units all require the sleeve pipe earthing device is improved design, implement the demand of on-line monitoring to satisfy sleeve pipe.
Chinese patent ZL 200920181460.3, Granted publication day is on November 24th, 2010, invention and created name is: the connecting terminal apparatus of bushing shell for transformer end screen; This application case comprises a connection terminal; This connection terminal comprises a conducting rod and a bottom shielding of bushing cable, and an end of said conducting rod is connected with this bottom shielding of bushing cable, and the bottom shielding of bushing stem that the other end and is drawn by sleeve pipe is connected; Said bottom shielding of bushing cable also is connected with an on-line monitoring system sensor, and ground connection; Said conducting rod also has one can be according to the discharging gap protector in electric pressure sleeve design different protection gap.Though this application case can be drawn out to on-line monitoring system with the signal of bushing shell for transformer end screen, the structure of this device is complicated, and the insulation effect of its connection terminal is bad, and conducting rod and connection terminal shell can not keep abundant insulation.
So, be badly in need of a kind of current signal of casing leak safely and effectively now and draw interface arrangement, to realize the application of on-line monitoring technique on bushing installation.
Summary of the invention
The technical matters that utility model will solve
The deficiency that can't signals security effectively be drawn when the utility model is implemented on-line monitoring to bushing shell for transformer in the prior art; The power transformer casing leak current signal ejector that provides a kind of on-line monitoring to use; Can realize the output of casing leak current signal; Carry out power transformer sleeve pipe on-line monitoring safely and effectively, realize the bushing installation on-line monitoring.
Technical scheme
For achieving the above object, the technical scheme that the utility model provides is:
The power transformer casing leak current signal ejector that a kind of on-line monitoring of the utility model is used; Comprise stainless steel sleeve pipe assembly joint and stainless steel sleeve pipe assembly; Wherein, Stainless steel sleeve pipe assembly joint and stainless steel sleeve pipe assembly are through being threaded, and it also comprises conducting rod, insulating bushing and insulating cell, and the leading-in end of conducting rod is connected with bottom shielding of bushing output terminal copper rod; Exit is through outgoing cable and ground connection again after current transformer is connected, and Current Transformer Secondary exports on-Line Monitor Device to; Insulating bushing is socketed on the outside of conducting rod, and insulating cell is between conducting rod exit and stainless steel sleeve pipe assembly bottom, and insulating bushing and insulating cell are formed the sealing insulating space.
Further, described conducting rod is the copper conducting rod, the leading-in end of conducting rod and exit are cylindrical shape, are equipped with endoporus in this leading-in end and the exit; The diameter of bore of conducting rod exit is 4 mm, and the degree of depth is 15 mm.
Further, insulating bushing is the epoxy insulation sleeve, insulating cell is the epoxy insulation liner.
The principle of the utility model:
The utility model comprises stainless steel sleeve pipe assembly, stainless steel sleeve pipe assembly joint, conducting rod, insulating sleeve and insulating cell composition; When assembly is fixed on the power transformer body; Copper conducting rod leading-in end closely contacts with bottom shielding of bushing output terminal copper rod, and establishing diameter in the copper conducting rod exit is that 4 mm, the degree of depth are the endoporus of 15mm, aperture outgoing cable and ground connection again after current transformer is connected in this; Current Transformer Secondary exports on-Line Monitor Device to; Epoxy insulation sleeve and epoxy insulation liner are formed the sealing insulating space, guarantee that copper conducting rod and assembly keep fully insulation, realize that the casing leak current signal exports on-Line Monitor Device to.
Beneficial effect
The technical scheme that adopts the utility model to provide is compared with existing known technology, has following beneficial effect:
(1) the power transformer casing leak current signal ejector used of a kind of on-line monitoring of the utility model is drawn power transformer casing leak current signal through conducting rod, has satisfied the demand that sleeve pipe is implemented on-line monitoring;
(2) insulating bushing of the conducting rod periphery of the utility model and insulating cell are formed the sealing insulating space, have guaranteed that copper conducting rod and assembly keep fully insulation, realize the reliability of casing leak current signal output;
(3) the utility model is simple in structure, is easy to make, and production cost is low.
Description of drawings
Fig. 1 is the parts stretch-out view of the power transformer casing leak current signal ejector of the utility model;
Fig. 2 is the structural representation of the utility model.
Label declaration in the synoptic diagram:
1-stainless steel sleeve pipe assembly joint; The 2-conducting rod; The 3-insulating bushing; The 4-insulating cell; 5-stainless steel sleeve pipe assembly.
Embodiment
For further understanding the content of the utility model, the utility model is described in detail in conjunction with accompanying drawing.
In conjunction with Fig. 1 and Fig. 2; The power transformer casing leak current signal ejector that a kind of on-line monitoring of the utility model is used; Comprise stainless steel sleeve pipe assembly joint 1, conducting rod 2, insulating bushing 3, insulating cell 4 and stainless steel sleeve pipe assembly 5; The leading-in end of conducting rod 2 is connected with bottom shielding of bushing output terminal copper rod, and exit is through outgoing cable and ground connection again after current transformer is connected, and Current Transformer Secondary exports on-Line Monitor Device to; Insulating bushing 3 is socketed on the outside of conducting rod 2, and insulating cell 4 is between conducting rod 2 exits and stainless steel sleeve pipe assembly 5 bottoms, and insulating bushing 3 is formed the sealing insulating space with insulating cell 4; The leading-in end of conducting rod 2 and exit are cylindrical shape, are equipped with endoporus in this leading-in end and the exit, and this two endoporus is not communicated with; Stainless steel sleeve pipe assembly joint 1 and stainless steel sleeve pipe assembly 5 are through being threaded.
Below in conjunction with embodiment the utility model is done further to describe.
Embodiment
The power transformer casing leak current signal ejector that a kind of on-line monitoring of present embodiment is used, conducting rod 2 is the copper conducting rod, leading-in end of conducting rod 2 (left-hand end of conducting rod 2 as shown in fig. 1) and exit (right-hand end of conducting rod 2 as shown in fig. 1) they are cylindrical shape; Be equipped with endoporus in this leading-in end and the exit, this two endoporus is not communicated with, and the leading-in end of conducting rod 2 is connected with bottom shielding of bushing output terminal copper rod; The diameter of bore of these conducting rod 2 leading-in ends is 4 mm; The degree of depth compliant requirement of this endoporus, the diameter of bore of conducting rod 2 exits is 4 mm, the degree of depth is 15 mm; This exit is through outgoing cable and ground connection again after current transformer is connected; Current Transformer Secondary exports on-Line Monitor Device to, and insulating bushing 3 is the epoxy insulation sleeve, is socketed on the outside of conducting rod 2; Insulating cell 4 is the epoxy insulation liner; Between conducting rod 2 exits and stainless steel sleeve pipe assembly 5 bottoms, insulating bushing 3 is formed the sealing insulating space with insulating cell 4, and stainless steel sleeve pipe assembly joint 1 and stainless steel sleeve pipe assembly 5 are through being threaded.
During use, when assembly was fixed on the power transformer body by stainless steel sleeve pipe assembly joint 1, epoxy insulation sleeve 3 was formed the sealing insulating space with epoxy insulation liner 4; Guarantee that copper conducting rod and assembly shell keep fully insulation; Guarantee the output of bottom shielding of bushing leakage current signal, satisfied the demand of sleeve pipe enforcement on-line monitoring, and simple in structure; Be easy to make, production cost is low.
Claims (4)
1. power transformer casing leak current signal ejector that on-line monitoring is used; Comprise stainless steel sleeve pipe assembly joint (1) and stainless steel sleeve pipe assembly (5); Wherein, stainless steel sleeve pipe assembly joint (1) and stainless steel sleeve pipe assembly (5) is characterized in that through being threaded: it also comprises conducting rod (2), insulating bushing (3) and insulating cell (4); Wherein, The leading-in end of described conducting rod (2) is connected with bottom shielding of bushing output terminal copper rod, and exit is through outgoing cable and ground connection again after current transformer is connected, and Current Transformer Secondary exports on-Line Monitor Device to; Insulating bushing (3) is socketed on the outside of conducting rod (2), and insulating cell (4) is positioned between conducting rod (2) exit and stainless steel sleeve pipe assembly (5) bottom, and insulating bushing (3) and insulating cell (4) are formed the sealing insulating space.
2. the power transformer casing leak current signal ejector that a kind of on-line monitoring according to claim 1 is used; It is characterized in that: described conducting rod (2) is the copper conducting rod; The leading-in end of conducting rod (2) and exit are cylindrical shape, are equipped with endoporus in this leading-in end and the exit.
3. the power transformer casing leak current signal ejector that a kind of on-line monitoring according to claim 1 and 2 is used, it is characterized in that: insulating bushing (3) is the epoxy insulation sleeve, and insulating cell (4) is the epoxy insulation liner.
4. the power transformer casing leak current signal ejector that a kind of on-line monitoring according to claim 3 is used is characterized in that: the diameter of bore of conducting rod (2) exit is 4 mm, and the degree of depth is 15 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204234132U CN202256571U (en) | 2011-10-31 | 2011-10-31 | Leakage current signal lead-out device of power transformer sleeve for online monitoring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204234132U CN202256571U (en) | 2011-10-31 | 2011-10-31 | Leakage current signal lead-out device of power transformer sleeve for online monitoring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202256571U true CN202256571U (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204234132U Expired - Fee Related CN202256571U (en) | 2011-10-31 | 2011-10-31 | Leakage current signal lead-out device of power transformer sleeve for online monitoring |
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| CN (1) | CN202256571U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344792A (en) * | 2013-06-28 | 2013-10-09 | 国家电网公司 | End screen downwards leading structure for monitoring transformer sleeve |
| CN103050240B (en) * | 2012-12-17 | 2015-12-02 | 国网浙江省电力公司电力科学研究院 | A kind of Transformer Bushing Tap signal ejector |
| CN108312408A (en) * | 2017-01-16 | 2018-07-24 | 浙江雷安电气有限公司 | A kind of composite bushing and its production technology |
| CN111856323A (en) * | 2020-07-17 | 2020-10-30 | 浙江海宁和金电子科技有限公司 | Electric wire clamp for anti-leakage power line tester |
| CN111952924A (en) * | 2020-09-03 | 2020-11-17 | 国网上海市电力公司 | A current lead-out device, installation method and anti-theft alarm system for suspending cables |
-
2011
- 2011-10-31 CN CN2011204234132U patent/CN202256571U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050240B (en) * | 2012-12-17 | 2015-12-02 | 国网浙江省电力公司电力科学研究院 | A kind of Transformer Bushing Tap signal ejector |
| CN103344792A (en) * | 2013-06-28 | 2013-10-09 | 国家电网公司 | End screen downwards leading structure for monitoring transformer sleeve |
| CN103344792B (en) * | 2013-06-28 | 2015-08-19 | 国家电网公司 | Guiding structure under special end shield monitored by a kind of bushing shell for transformer |
| CN108312408A (en) * | 2017-01-16 | 2018-07-24 | 浙江雷安电气有限公司 | A kind of composite bushing and its production technology |
| CN111856323A (en) * | 2020-07-17 | 2020-10-30 | 浙江海宁和金电子科技有限公司 | Electric wire clamp for anti-leakage power line tester |
| CN111952924A (en) * | 2020-09-03 | 2020-11-17 | 国网上海市电力公司 | A current lead-out device, installation method and anti-theft alarm system for suspending cables |
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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 |
Granted publication date: 20120530 Termination date: 20151031 |
|
| EXPY | Termination of patent right or utility model |