CN203310928U - Transformer bushing ct characteristic test device - Google Patents
Transformer bushing ct characteristic test device Download PDFInfo
- Publication number
- CN203310928U CN203310928U CN2012206986650U CN201220698665U CN203310928U CN 203310928 U CN203310928 U CN 203310928U CN 2012206986650 U CN2012206986650 U CN 2012206986650U CN 201220698665 U CN201220698665 U CN 201220698665U CN 203310928 U CN203310928 U CN 203310928U
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- China
- Prior art keywords
- transformer bushing
- transformer
- test
- bushing
- characteristic test
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- Expired - Fee Related
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- 238000012360 testing method Methods 0.000 title claims abstract description 79
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052802 copper Inorganic materials 0.000 claims abstract description 5
- 239000010949 copper Substances 0.000 claims abstract description 5
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 4
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 4
- 239000004020 conductor Substances 0.000 claims description 11
- 238000009413 insulation Methods 0.000 claims description 4
- 230000008029 eradication Effects 0.000 claims description 3
- 210000000003 hoof Anatomy 0.000 claims description 3
- 238000004804 winding Methods 0.000 abstract description 9
- 238000009434 installation Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Testing Relating To Insulation (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The utility model discloses a transformer bushing CT characteristic test device which can be used to solve problems of complex operation, low working efficiency, high labor intensity, etc., caused by the reason of oil discharge in the prior art. The transformer bushing CT characteristic test device is characterized in that the end portion of a test connection wire (10) of a test connection wire wiring terminal (6) of a transformer bushing CT characteristic test tester (1) is provided with an insulated wire (12) additionally, wherein the insulated wire (12) is a copper bar having a diameter of 10 millimetres and a length of 1.0-1.8 meters, the insulated wire (12) is covered by an insulated thermoplastic pipe, two ends of the insulated wire (12) are exposed by 3 centimeters of copper core, and the lower end of the insulated wire (12) is shaped like a horseshoe. The transformer bushing CT characteristic test device of the utility model has advantages of simple structure, easy operation, etc., can be used to effectively prevent the bushing CT secondary winding from being affected with damp, find whether a problems exists in the transformer bushing CT in advance, and leave plenty of time to the installation of transformer accessories or provide the basis for the replacement of the transformer bushing CT, the test effect will not be affected, and the transformer bushing CT characteristic test device can be widely used in transformer bushing CT tests in a transformer substation.
Description
One, technical field
The utility model belongs to sends out the power supply checkout facility, relates in particular to a kind of transformer bushing CT characteristic test apparatus.
Two, background technology
For electric system, large electrical network, high voltage are the inexorable trends of Future Development.Along with 110KV and above transformer station new construction, increase-volume extension project, overhaul technological transformation are installed, are changed the transformer project and increase, the transformer bushing CT test mission is corresponding increasing also, and transformer bushing CT polarity, no-load voltage ratio, volt-ampere characteristic test (hereinafter to be referred as attribute testing) are the Installation and Debugging work of the secondary device projects of must doing experiment.The testing regulations that State Grid Corporation of China and each net provincial electric power company are promulgated; all the no-load voltage ratio test before the current transformer operation, after the replacing winding, after overhaul is classified as to one of important tests project of examination, because the correctness of no-load voltage ratio is directly connected to the accuracy of metering and the reliability of protection.
At present, the 220kV main transformer protection all adopts the dual configuration., medium voltage side high for the 220kV main transformer, the electric current of a set of differential protection is from main transformer line interval pagoda CT, and the electric current of another set of differential protection is from main transformer body cannula C T.Not only main transformer differential main protection, every protection that involves direction, back-up protection (as composite voltage direction overcurrent etc.) all will be used sleeve of main transformer CT.Therefore the polarity for each group ac flow of guaranteeing to enter protective device is correct, volt-ampere characteristic meets the demands, no-load voltage ratio is correct, must test cannula C T.
Transformer production producer is in order to meet relevant rules and technical requirement, transformer bushing CT is normally filled with oil and is transported to scene, uses traditional transformer cannula C T proving installation to carry out the transformer bushing CT test and has following shortcoming: 1, the oil in transformer bushing CT will be bled off; While 2, testing, need standby oil drum, oil pumper, oil pipe; While 3, before transformer accessory assembling, testing, test completely, to need to recover shrouding also oil-filled in order to prevent winding from making moist, and increased like this workload of experiment work; When with transformer accessory assembling, synchronizeing while testing, often affect the annexes assembling work efficiency such as transformer bushing CT, sleeve pipe.
Three, summary of the invention
The purpose of this utility model is for market provides a kind of transformer bushing CT characteristic test apparatus that can be simple in structure, practical, time saving and energy saving, thereby reaches efficiency and the transformer accessory assembling work efficiency that improves the transformer bushing CT attribute testing.
The technical solution of the utility model is: it comprises that by LCD display, test knob, polarity test circuit, volt-ampere characteristic test circuit, no-load voltage ratio hookup, test, connecting wire binding post is connected wire with transformer bushing CT attribute testing tester and test that power-line terminal forms, the test connection wire termination that connects wire binding post in test has been set up an eradication edge wire, and the two ends of this insulated conductor are metal-cored exposes.Described insulated conductor is the copper rod of 10 millimeters of φ, 1.0～1.8 meters of length, adopts insulation thermoplastic tube parcel, and 3 centimetres of copper cores are exposed at two ends, and lower end is the shape of a hoof.
The beneficial effects of the utility model are: not only rational in infrastructure, simple to operate, and has a high efficiency, while carrying out transformer bushing CT polarity, no-load voltage ratio, volt-ampere characteristic test, do not need to drain the oil, reduced transformer bushing CT Secondary Winding aerial open-assembly time, can prevent effectively that cannula C T Secondary Winding from making moist, can find in advance whether transformer bushing CT has problems, leaving the sufficient time changes foundation is provided to the installation of transformer accessory or transformer bushing CT, do not affect test effect, the advantage such as practical.
The utility model is described in further detail below in conjunction with accompanying drawing:
Four, accompanying drawing explanation
Fig. 1 is the utility model circuit theory schematic diagram;
Fig. 2 is that the utility model is used the state wiring schematic diagram.
In figure: 1 is transformer bushing CT attribute testing tester, and 2 is LCD display, and 3 are the test knob, 4 is that polarity test circuit, 5 is the volt-ampere characteristic test circuit, and 6,7 for test connects wire binding post, and 8 is the no-load voltage ratio hookup, 9 is power-line terminal, and 10,11 for test connects wire, and 12 is insulated conductor, 13 is transformer bushing CT, and 14 is flange, and 15 is shrouding, 16 is the Secondary Winding iron core, 17 is transformer oil, and 18 is the oil pipe flange, and 19 is flange screw.
Five, embodiment
As shown in Figure 1, the test that is connected wire binding post 6 in the test that is connected the existing transformer bushing CT attribute testing tester 1 that wire binding post 6,7 and power-line terminal 9 form by LCD display 2, test knob 3, polarity test circuit 4, volt-ampere characteristic test circuit 5, no-load voltage ratio hookup 8, test connects wire 10 ends and has set up an eradication edge wire 12, this insulated conductor 12 is the copper rod of 10 millimeters of φ, 1.5 meters of length, adopt insulation thermoplastic tube parcel, 3 centimetres of copper cores are exposed at two ends, and lower end is the shape of a hoof.While implementing the utility model, only the upper-end closing plate of transformer bushing CT 13 need be opened, and make the bottom insulation of shrouding under CT, then insulated conductor 12 is put into to transformer bushing CT 13, shrouding 15 under the CT of insulated conductor 12 and transformer bushing CT 13 lower ends is reliably contacted, the test of then test connection wire binding post 6 on transformer bushing CT attribute testing tester 1 being drawn connects the upper end that wire 10 is connected to insulated conductor 12, namely with bushing shell for transformer, be connected side, the back to zero test that simultaneously test on transformer bushing CT attribute testing tester 1 is connected to wire binding post 7 connects wire 11 and is connected on transformer bushing CT flange screw 19, namely with transformer body, be connected side, can be by polarity test circuit 4, on volt-ampere characteristic test circuit 5 or the extension line that changes hookup 8 and transformer bushing CT 13, the Secondary Winding connection terminal of Secondary Winding iron core 16 is connected, can carry out bushing CT polarity, volt-ampere characteristic test or no-load voltage ratio test.That is: the insulated conductor of this device 12 is inserted in transformer bushing CT, 12 copper rods pass through the flange screw of 13 times end-plates 15 of transformer bushing CTs to transformer bushing CT 13 to a measuring current from transformer bushing CT attribute testing tester to insulated conductor, then return to transformer bushing CT attribute testing tester 1, in fact primary current has passed through the Secondary Winding iron core of transformer bushing CT 13, and its principle and the transformer bushing CT laggard line transformer cannula C T attribute testing principle of draining the oil is the same.We have carried out draining the oil and not draining the oil contrast test to bushing CT polarity, no-load voltage ratio, the volt-ampere characteristic of main transformer, and test findings shows: the two test figure matches; Facts have proved: do not drain the oil and do not affect test effect while carrying out the transformer bushing CT attribute testing.The utility model is not only simple in structure, and operation is very easy, some drawbacks of having drained the oil and having brought while having avoided carrying out the transformer bushing CT attribute testing, and work efficiency is greatly improved, and can be widely used in the transformer bushing CT test of transformer station.
Claims (2)
1. transformer bushing CT characteristic test apparatus, it comprises that by LCD display (2), test knob (3), polarity test circuit (4), volt-ampere characteristic test circuit (5), no-load voltage ratio hookup (8), test, connecting wire binding post (6,7) is connected wire with transformer bushing CT attribute testing tester (1) and test that power-line terminal (9) forms, it is characterized in that: an eradication edge wire (12), metal-cored the exposing in two ends of this insulated conductor (12) have been set up in test connection wire (10) end that connects wire binding post (6) in test.
2. transformer bushing CT characteristic test apparatus according to claim 1, it is characterized in that: described insulated conductor (12) is the copper rod of 10 millimeters of φ, 1.0～1.8 meters of length, adopt insulation thermoplastic tube parcel, 3 centimetres of copper cores are exposed at two ends, and lower end is the shape of a hoof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206986650U CN203310928U (en) | 2012-12-04 | 2012-12-04 | Transformer bushing ct characteristic test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206986650U CN203310928U (en) | 2012-12-04 | 2012-12-04 | Transformer bushing ct characteristic test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203310928U true CN203310928U (en) | 2013-11-27 |
Family
ID=49617129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012206986650U Expired - Fee Related CN203310928U (en) | 2012-12-04 | 2012-12-04 | Transformer bushing ct characteristic test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203310928U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104330763A (en) * | 2014-11-24 | 2015-02-04 | 云南电网公司曲靖供电局 | Test method for bushing current transformer of main transformer |
-
2012
- 2012-12-04 CN CN2012206986650U patent/CN203310928U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104330763A (en) * | 2014-11-24 | 2015-02-04 | 云南电网公司曲靖供电局 | Test method for bushing current transformer of main transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HUANGGANG POWER SUPPLY COMPANY, HUBEI ELECTRIC POW Effective date: 20140207 Owner name: STATE GRID CORPORATION OF CHINA Free format text: FORMER OWNER: POWER TRANSFORMATION EXAMINATION AND REPAIR CENTER, HUANGGANG POWER SUPPLY COMPANY Effective date: 20140207 |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 438000 HUANGGANG, HUBEI PROVINCE TO: 100761 DONGCHENG, BEIJING |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140207 Address after: 100761 West Chang'an Avenue, Beijing, No. 86 Patentee after: State Grid Corporation of China Patentee after: HUANGGANG POWER SUPPLY COMPANY, HUBEI ELECTRIC POWER CO., LTD. Patentee after: MAINTENANCE COMPANY, HUANGGANG POWER SUPPLY CO., LTD. Address before: 438000 No. 9 Yanjiang Avenue, Huangzhou District, Hubei, Huanggang Patentee before: Huanggang Power Supply Company Substation Maintenance Center |
|
| 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: 20131127 Termination date: 20171204 |