CN103730246A - 10KV potential transformer - Google Patents
10KV potential transformer Download PDFInfo
- Publication number
- CN103730246A CN103730246A CN201310691528.3A CN201310691528A CN103730246A CN 103730246 A CN103730246 A CN 103730246A CN 201310691528 A CN201310691528 A CN 201310691528A CN 103730246 A CN103730246 A CN 103730246A
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- China
- Prior art keywords
- potential transformer
- transformer
- phase potential
- voltage transformer
- winding
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- 239000012212 insulator Substances 0.000 claims abstract description 22
- 238000004804 winding Methods 0.000 claims abstract description 18
- 239000002184 metal Substances 0.000 claims abstract description 12
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- 238000012544 monitoring process Methods 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 230000007935 neutral effect Effects 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 239000012774 insulation material Substances 0.000 claims description 3
- 239000000696 magnetic material Substances 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000005266 casting Methods 0.000 abstract 1
- 230000006872 improvement Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 241000883966 Astrophytum capricorne Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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- Transformers For Measuring Instruments (AREA)
Abstract
The invention aims to provide a 10KV potential transformer comprising a base. A junction box and three single-phase potential transformers are arranged on the base, and a secondary terminal of each single-phase potential transformer is connected with the junction box through a lead. A core is arranged inside each single-phase potential transformer, and a metering winding, a monitoring winding and a protecting winding which are independent from one another are arranged on each core. A shell of the single-phase potential transformer is an insulator, and binding posts are arranged on each insulator shell. A metal connector with a locking nut is exposed to the top end of each binding post. Through the totally-enclosed insulators moulded by one-step casting, the metering, monitoring and protecting windings are separated from one another without mutual interference, and the 10KV potential transformer is high in precision, tolerable to outdoor environment, highly uvioresistant and safe and reliable to use; a three-phase group is formed through the three single-phase potential transformers, and a harmonic wave eliminator is added, so that operational reliability of the 10KV potential transformer is improved, and the 10KV potential transformer is applicable to power systems with rated voltage of 10KV and below for voltage and electric energy measurement and relay protection.
Description
Technical field
The present invention relates to a kind of instrument transformer, be specifically related to a kind of 10KV voltage transformer.
Background technology
(Potential transformer is called for short PT to voltage transformer; also be called for short TV); for the voltage on conversion line; object is mainly for powering to measuring instrument and protective relaying device; be used for voltage, power and the electric energy of measurement circuitry, or be used for the expensive equipment in protection circuit, motor and transformer when line failure.Existing outdoor type voltage transformer, especially 10KV and following voltage transformer, the winding phase mutual interference in instrument transformer, causes the problem that precision is not high, and the insulation crust of instrument transformer tolerance outdoor environment and anti-uv-ray are poor, have certain potential safety hazard.
Summary of the invention
For above-mentioned deficiency, the invention provides a kind of 10KV voltage transformer, by insulator, adopt the full-enclosed structure of disposal pouring moulding, there is high accuracy, can tolerate the advantage of outdoor environment, uvioresistant impact; Adopt metering, monitoring, protection winding separately, do not interfere with each other, safe and reliable; By three single-phase potential transformers composition three-phase groups, be assembled on same base, and set up terminal box and be convenient to wiring, simple in structure, meet outdoor use, and there is resonance resisting capacity, greatly improved the operational reliability of product; Be applicable to rated frequency and be 50Hz or 60Hz, rated voltage and be 10KV and be and following electric power system in do voltage, electric energy measurement and used for relay protection.
The object of this invention is to provide a kind of 10KV voltage transformer, comprise base, be provided with terminal box and three single-phase potential transformers on described base, the secondary terminals of described single-phase potential transformer is connected with terminal box by lead-in wire; Single-phase potential transformer inside is provided with iron core, separate measure winding, monitoring winding, protection winding on iron core; The shell of single-phase potential transformer is insulator, on insulator shell, is provided with binding post; The exposed metal connection seat having with locking nut in binding post top.
Further improvement of the present invention is: the insulator shell of described single-phase potential transformer is the full-enclosed structure of disposal pouring moulding, insulator shell adopts import outdoor type epoxy resin to make insulation material, the total height of insulator shell is 425 ~ 435mm, and the distance between each metal connection seat is 230 ~ 240mm.
Further improvement of the present invention is: described 10KV voltage transformer neutral point is provided with resonance eliminator, resonance eliminator is positioned on base, three metal connection seats that are positioned at homonymy are connected by bus, are provided with wiring nut on bus, wiring nut and resonance eliminator electrical connection.
Further improvement of the present invention is: described resonance eliminator is nonlinear resistance type resonance eliminator.
Further improvement of the present invention is: in described terminal box, be provided with secondary sealing cover, the other Wire fastener that is provided with of terminal box.
Further improvement of the present invention is: described iron core is high-quality permeability magnetic material.
Beneficial effect of the present invention: adopt the full-enclosed structure of disposal pouring moulding by insulator, there is high accuracy, can tolerate the advantage of outdoor environment, uvioresistant impact; Adopt metering, monitoring, protection winding separately, do not interfere with each other, safe and reliable; By three single-phase potential transformers composition three-phase groups, be assembled on same base, and set up terminal box and be convenient to wiring; Neutral point at voltage transformer is set up resonance eliminator, makes when isolated neutral system is used, and can effectively prevent that intermittent arc grounding overvoltage from burning voltage transformer.
The present invention is simple in structure; meet outdoor use; and there is resonance resisting capacity and resistance to overvoltage ability, greatly improved the operational reliability of product, be applicable to rated frequency and be 50Hz or 60Hz, rated voltage and be 10KV and be and following electric power system in do voltage, electric energy measurement and used for relay protection.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
Vertical view of the present invention during Fig. 2.
Wherein: 1-base, 2-terminal box, 3-single-phase potential transformer, 4-binding post, 5-metal connection seat, 6-resonance eliminator, bis-sealing covers of 7-, 8-Wire fastener, 9-bus, 10-wiring nut.
Embodiment
In order to deepen the understanding of the present invention, below in conjunction with embodiment, the invention will be further described, and this embodiment only, for explaining the present invention, does not form limiting the scope of the present invention.
The present embodiment provides a kind of 10KV voltage transformer, comprises base 1, is provided with terminal box 2 and three single-phase potential transformers 3 on described base 1, and the secondary terminals of described single-phase potential transformer 3 is connected with terminal box 2 by lead-in wire; Single-phase potential transformer 3 inside are provided with iron core, and iron core is provided with separate measure winding, monitoring winding, protection winding; The shell of single-phase potential transformer 3 is insulator, on insulator shell, be provided with the binding post 4 that two outer surfaces are covered with umbrella projection, umbrella projection is divided into and has two kinds and two kinds of bulge clearance settings according to diameter, and two binding posts 4 are the setting of goat's horn shape on insulator shell; The exposed metal connection seat 5 having with locking nut in binding post 4 tops.The insulator shell of described single-phase potential transformer 3 is the full-enclosed structure of disposal pouring moulding, and insulator shell adopts import outdoor type epoxy resin to make insulation material, has the characteristic that precision is high, can tolerate outdoor environment, uvioresistant impact; The total height of insulator shell is 430mm, and the distance between each metal connection seat 5 is 230mm.Described 10KV voltage transformer neutral point is provided with resonance eliminator 6, resonance eliminator 6 is positioned on base 1, three the metal connection seats 5 that are positioned at " N " end of a winding are electrically connected with resonance eliminator 6, connected mode is: be positioned at three metal connection seats 5 of homonymy by hold-down nut and bus 9 connected in electrical series, on bus 9, be provided with wiring nut 10, wiring nut 10 is electrically connected with resonance eliminator 6; When isolated neutral system is used, can effectively prevent that intermittent arc grounding overvoltage from burning voltage transformer.Described resonance eliminator 6 is nonlinear resistance type resonance eliminator.In described terminal box 2, be provided with secondary sealing cover 7, the other Wire fastener 8 that is provided with of terminal box 2.On base 1, be also provided with installing hole and the retainer ring being convenient to install and use, and offer the ground hole of being convenient to temporary grounding.Described iron core is that high-quality permeability magnetic material is made, reduced magnetic flux density, the degree of saturation of magnetic property while having improved overvoltage, can bear the high voltage that relatively short circuit produces in a long time, there is antiresonance and resistance to overvoltage capabilities, greatly improved the operational reliability of product.
The present embodiment adopts the full-enclosed structure of disposal pouring moulding by insulator, have high accuracy, can tolerate the advantage of outdoor environment, uvioresistant impact; Adopt metering, monitoring, protection winding separately, do not interfere with each other, safe and reliable; By three single-phase potential transformers 3, form three-phase group, be assembled on same base, and set up terminal box 2 and be convenient to wiring; At the neutral point of voltage transformer, set up resonance eliminator 6, make when isolated neutral system is used, can effectively prevent that intermittent arc grounding overvoltage from burning voltage transformer.
Claims (6)
1. a 10KV voltage transformer, comprise base (1), it is characterized in that: on described base (1), be provided with terminal box (2) and three single-phase potential transformers (3), the secondary terminals of described single-phase potential transformer (3) is connected with terminal box (2) by lead-in wire; Single-phase potential transformer (3) inside is provided with iron core, and iron core is provided with separate measure winding, monitoring winding, protection winding; The shell of single-phase potential transformer (3) is insulator, is provided with binding post (4) on insulator shell; The exposed metal connection seat (5) having with locking nut in binding post (4) top.
2. 10KV voltage transformer as claimed in claim 1, it is characterized in that: the insulator shell of described single-phase potential transformer (3) is the full-enclosed structure of disposal pouring moulding, insulator shell adopts import outdoor type epoxy resin to make insulation material, the total height of insulator shell is 425 ~ 435mm, and the distance between each metal connection seat (5) is 230 ~ 240mm.
3. 10KV voltage transformer as claimed in claim 1, it is characterized in that: described 10KV voltage transformer neutral point is provided with resonance eliminator (6), resonance eliminator (6) is positioned on base (1), be positioned at three metal connection seats (5) of homonymy by bus (9) series connection, on bus (9), be provided with wiring nut (10), wiring nut (10) and resonance eliminator (6) electrical connection.
4. 10KV voltage transformer as claimed in claim 3, is characterized in that: described resonance eliminator (6) is nonlinear resistance type resonance eliminator.
5. 10KV voltage transformer as claimed in claim 1, is characterized in that: in described terminal box (2), be provided with secondary sealing cover (7), the other Wire fastener (8) that is provided with of terminal box (2).
6. 10KV voltage transformer as claimed in claim 1, is characterized in that: described iron core is high-quality permeability magnetic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310691528.3A CN103730246A (en) | 2013-12-17 | 2013-12-17 | 10KV potential transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310691528.3A CN103730246A (en) | 2013-12-17 | 2013-12-17 | 10KV potential transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103730246A true CN103730246A (en) | 2014-04-16 |
Family
ID=50454280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310691528.3A Pending CN103730246A (en) | 2013-12-17 | 2013-12-17 | 10KV potential transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103730246A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332298A (en) * | 2014-10-30 | 2015-02-04 | 国家电网公司 | Intelligent three-phase integrated voltage transformer of un-grounded system |
| CN107768123A (en) * | 2017-10-23 | 2018-03-06 | 湖北霞光电力设备有限公司 | A kind of intelligent power-off protection electromagnetic potential transformer |
| CN108447667A (en) * | 2018-05-04 | 2018-08-24 | 卓维电力科技有限公司 | A kind of safe voltage transformer |
-
2013
- 2013-12-17 CN CN201310691528.3A patent/CN103730246A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332298A (en) * | 2014-10-30 | 2015-02-04 | 国家电网公司 | Intelligent three-phase integrated voltage transformer of un-grounded system |
| CN107768123A (en) * | 2017-10-23 | 2018-03-06 | 湖北霞光电力设备有限公司 | A kind of intelligent power-off protection electromagnetic potential transformer |
| CN108447667A (en) * | 2018-05-04 | 2018-08-24 | 卓维电力科技有限公司 | A kind of safe voltage transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140416 |
|
| WD01 | Invention patent application deemed withdrawn after publication |