CN2817020Y - Outdoor dry type totally-enclosed anti-ferromagnetic resonance three-phase voltage transformer - Google Patents
Outdoor dry type totally-enclosed anti-ferromagnetic resonance three-phase voltage transformer Download PDFInfo
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- CN2817020Y CN2817020Y CN 200520092187 CN200520092187U CN2817020Y CN 2817020 Y CN2817020 Y CN 2817020Y CN 200520092187 CN200520092187 CN 200520092187 CN 200520092187 U CN200520092187 U CN 200520092187U CN 2817020 Y CN2817020 Y CN 2817020Y
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- 230000005329 antiferromagnetic resonance Effects 0.000 title abstract 3
- 238000004804 winding Methods 0.000 claims abstract description 45
- 230000007935 neutral effect Effects 0.000 claims abstract description 10
- 238000009413 insulation Methods 0.000 claims description 34
- 238000007789 sealing Methods 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 4
- 238000012806 monitoring device Methods 0.000 claims description 3
- 239000012774 insulation material Substances 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 239000011810 insulating material Substances 0.000 abstract description 3
- 230000005290 antiferromagnetic effect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 8
- 238000005259 measurement Methods 0.000 description 7
- 239000003822 epoxy resin Substances 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- 230000008030 elimination Effects 0.000 description 3
- 238000003379 elimination reaction Methods 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 210000004899 c-terminal region Anatomy 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model discloses an outdoor dry-type totally closed anti ferromagnetic resonance three-phase voltage transformer, it has the voltmeter body, draws forth the primary winding of the voltmeter body to a binding post through a conductive body, and secondary binding post draws forth to the secondary terminal box through the wire, the voltmeter body is four, and its primary winding is connected the line according to anti ferromagnetic resonance principle through a wire, specifically is wherein after the primary winding of A ~ C voltmeter body constitutes three-phase star connection, once neutral point is through zero sequence voltage ware body primary winding ground connection, namely N end ground connection of the primary winding of the voltmeter body, and after the secondary winding of A ~ C voltmeter body forms star connection, the secondary neutral point is through the basic secondary winding ground connection of zero sequence voltage ware body, namely N end ground connection again of the basic secondary winding of zero sequence voltage ware body; all the components are sealed into an integral structure through insulating materials at one time. The utility model has the characteristics of anti ferromagnetic is wiped out and is shaken, insulating stable, leakproofness are good etc.
Description
Technical field
The utility model relates to electric power system high-tension measurement equipment, the totally-enclosed anti-ferro resonance threephase potential transformer of specifically a kind of outdoor dry type.
Background technology
Voltage transformer is the equipment of measuring voltage, electric energy in electric power system or the electric control system.At present; the outdoor threephase potential transformer mostly is the oil immersed type voltage transformer; the function that does not all possess anti-ferro resonance; because voltage transformer is as an inductance element; influenced by some extraneous excitation condition of network; through regular meeting the ferro resonance phenomenon taking place, and then has influence on the reliability of operation of power networks.The unstable properties of harmonic elimination apparatus once adopted a neutral point to add harmonic elimination apparatus, because also can't be restrained the generation of resonance and be burnt voltage transformer; Or adopt four outdoor dry type single-phase transformers, reach the purpose of anti-ferro resonance through aerial lug, but installation and wiring are more loaded down with trivial details; The anti-ferro resonance type of indoor type voltage transformer is to adopt four voltage transformers to dress up integrative-structure (promptly so-called semi-enclosed) through the external iron core group, but only be applicable to indoor environment by this structure, and be subjected to the influence fluctuation of outdoor adverse circumstances bigger as the oil immersion dielectric, easy oil leakage in the use, and along with time lengthening ageing of insulation occurs and easily causes insulation breakdown, thereby also can have an accident.The insulation of ferro resonance and oil immersed type voltage transformer safeguards it is the more serious problem that power department is generally acknowledged, frequent going wrong caused very big economic loss, increased lot of manpower and material resources.
The utility model content
The purpose of this utility model is to provide a kind of outdoor dry type totally-enclosed anti-ferro resonance threephase potential transformer, and the existing oil immersed type voltage transformer of solution can not prevent ferro resonance, insulation is unstable, seepage is oily and semiclosed product can not be used for problems such as open air.
For achieving the above object, the technical solution adopted in the utility model is:
The utlity model has voltage device body, by the primary conductive body winding of voltage device body is led to the primary connection terminal, the secondary connection terminal leads to the secondary connection box through lead, it is characterized in that: described voltage device is as four, after a winding of A wherein～C voltage device body is formed the three-phase star-star connection, a neutral point is through winding earth of residual voltage device body, be the N end ground connection of a winding of residual voltage device body, after the secondary winding of A～C voltage device body forms star-star connection, secondary neutral is through the basic secondary winding ground connection of residual voltage device body, and promptly the n of the basic secondary winding of residual voltage device body holds ground connection again; Above-mentioned each components and parts are through the disposable integrative-structure that is sealed to of insulation material, and integral installation is on a grooved base, and the part that envelope is put voltage device body is the main insulation body.
The secondary side of described residual voltage device body also is provided with ground connection supervision secondary winding, and dn end ground connection wherein is provided with a protection relay between the da termination, termination of ground connection supervision secondary winding and dn termination, or da termination and dn termination directly are connected in the failure monitoring device; Described primary connection terminal envelope places in High-Voltage Insulation post, is distributed in the upper surface of main insulation body, and the outside of a High-Voltage Insulation post and main insulation body outer surface of upper are rainproof full skirt; Described secondary connection box is provided with several secondary line outlets, the slit cable end socket shutoff between secondary line and the secondary line outlet, and this secondary connection box is provided with the box cover, by the screw and the sealing of secondary connection box of band lead sealing; The upper surface of described main insulation body is the inclined-plane.
The utlity model has following advantage:
1. anti-ferromagnetic wiping shaken, and insulation is stable, good airproof performance.The utility model voltage device body is pressed the wiring of anti-ferro resonance principle by a lead, destroyed the condition that resonance produces, and the composite insulating material by epoxy resin or epoxy resin and silicon rubber will constitute each components and parts of the present utility model and pour into totally-enclosed dry construction, thereby changed present outdoor threephase potential transformer and adopted the oil immersion insulation, do not have anti-ferro resonance and semi-enclosed product and can not be used for outdoor present situation, be applicable to that outdoor rated frequency is 50Hz or 60Hz, rated voltage is to make voltage in 35KV and the following three-phase power circuit, electric energy measurement is used, and has solved the easy resonance of old-fashioned in the past outdoor threephase potential transformer, the problem that insulation is unstable and sealing is poor;
2. corrosion-resistant, non-maintaining, safe in utilization.The dry construction of hermetically sealed, all insulation of the present utility model makes in 35KV and the following electric power system and can not re-use oil immersion insulation and easy resonance threephase potential transformer, has fundamentally solved the easy oil impregnate of outdoor voltage transformer, easily resonance and other maintenance issues; Because the upper surface beveling of the utility model main insulation body prevents the sleet deposition, main insulation body and a High-Voltage Insulation post outside have the rainproof full skirt of self-supporting, make the surface seeping phenomenon can not occur, are suitable for various families adverse circumstances; The secondary connection box is provided with the box cover, by screw and the secondary connection box sealing of band lead sealing, can play preventing to get an electric shock and the effect of stealing, improves the reliability of power supply greatly, is widely used in metering transformation and new, the old easy resonance circuit;
3. has the relaying protection function.When the utility model does not have earth fault, its protection winding residual voltage≤10V, when 100% fault took place mutually in 1 of system, its output 100V voltage was for used for relay protection;
Description of drawings
Fig. 1 is the utility model external structure front view;
Fig. 2 is the utility model external structure vertical view;
Fig. 3 is the utility model internal structure schematic diagram;
Fig. 4 is the comprehensive line map of the utility model measurement;
Fig. 5 is the utility model metering and measurement split line map.
Embodiment
Shown in Fig. 1～3, the utility model adopts following structure: comprise voltage device body 1, the primary connection terminal and the secondary connection box 5 that are electrically connected with voltage device body 1 by primary conductive body 2, above-mentioned each components and parts, adopt the insulating material such as composite material of epoxy resin or epoxy resin and silicon rubber to pour into a pour mass, integral installation is on a grooved base 6, and the part that envelope is put voltage device body 1 is a main insulation body 1; As Fig. 1, shown in Figure 4, described voltage device body 1 is four, parallel being distributed in the main insulation body 11, press the wiring of anti-ferro resonance principle by a lead, be specially a winding AO of A～C voltage device body wherein, BO, after CO forms the three-phase star-star connection, a neutral point O is through a winding ON of residual voltage device body ground connection, be the N end ground connection of a winding ON of residual voltage device body, be equivalent to through high resistance grounding, each phase winding is connected across on the voltage between phases of power supply, no longer be associated with ground capacity, when certain phase 100% ground connection occurring once, though two phase voltages raise (being elevated to 1.732 times) in addition, the voltage that other two phase windings are accepted is constant, promptly do not possess the condition that ferro resonance produces, thereby just ferro resonance can not take place;
After secondary winding ao, the bo of A～C voltage device body, co formed star-star connection, secondary neutral o was through the basic secondary winding on ground connection of residual voltage device body, and promptly the n of the basic secondary winding on of residual voltage device body holds ground connection again; Residual voltage device body has a ground connection supervision winding da-dn, wherein but the dn end is held common ground with the n of basic secondary winding on, also can distinguish ground connection, between the da termination of ground connection supervision secondary winding da-dn and dn termination, a protection relay J can be set, or da termination and dn termination are connected to directly in the failure monitoring device; This mode of connection, when certain phase earth fault occurring, the voltage of ground connection supervision winding da-dn output 100V provides signal for the ground(preference) relay action or to Computerized monitor system, and voltage transformer still can normally move simultaneously, normal metering.When system normally moved, ground connection supervision winding output voltage≤10V can not cause relay misoperation work etc.
Voltage device body 1 of the present utility model leads to main insulation body 11 tops through primary conductive body 2, threaded inserts output is adopted in external cabling, form five primary connection terminals, i.e. A terminal, B terminal, C terminal, O terminal and N terminal, primary conductive body 2 is placed in High-Voltage Insulation post 3 by envelope; The outside of a High-Voltage Insulation post 3 and main insulation body 11 outer surface of upper are the rainproof full skirt 12 that adapts to outdoor environment; 3 minutes two rows of High-Voltage Insulation post are distributed on the main insulation body 11 with the direction vertical with base 6; Described main insulation body 11 upper surfaces are the inclined-plane with inclination angle, this inclined-plane can be one, also can be the inclined-plane that two or more crossing outside belows tilt, it is that highest order tilts to front lower place, the back lower place respectively that present embodiment adopts from the cross central line of vertical view, can prevent that like this sleet from its surface deposition, helping sleet and in time draining;
Secondary connection box 5 is located at the side-lower of main insulation body 11, the bottom of secondary connection box 5 has several circular secondary line outlets 8 that Open Side Down, 9 shutoff of cable end socket can be used in slit between secondary line and the secondary line outlet 8, this secondary connection box 5 is provided with the box cover, screw and secondary connection box 5 by the band lead sealing seals, and can play to prevent to get an electric shock and the effect of stealing; Described base 6 except that having installing hole 10, also is provided with suspension ring for the channel-section steel that two of being connected with above-mentioned pour mass be arranged in parallel, notch is downward on the base 6, for user's carrying, installing and locating provides convenience.
The utility model provides two kinds of external wiring patterns, as shown in Figure 4, is the comprehensive line map of measurement, and the secondary terminal has a, b, c, o, n, da, seven terminals of dn; As shown in Figure 5, be metering and measurement split line map, the secondary terminal is 1a, 1b, 1c, 2a, 2b, 2c, o, n, ten terminals of da, dn; No matter the utility model adopts above-mentioned which kind of external wiring pattern, and metering and measurement all can be carried out simultaneously.
During use, a winding N terminal ground connection, the O terminal is without ground connection; Neutral point can not install the damping resonance eliminator again additional or take other harmonic elimination vibration means during the product operation; Secondary winding only allows one point earth, and the direct ground connection of n terminal is when n terminal ground connection, secondary terminals such as o, a, b are ground connection again, otherwise can cause the short circuit of product secondary winding and burn, secondary winding o terminal does not allow external lead-out wire, can avoid zero sequence winding multipoint earthing and short circuit.
Claims (5)
1. totally-enclosed anti-ferro resonance threephase potential transformer of outdoor dry type, has voltage device body, by the primary conductive body winding of voltage device body is led to the primary connection terminal, the secondary connection terminal leads to the secondary connection box through lead, it is characterized in that: described voltage device body (1) is four, a winding (AO of A wherein～C voltage device body, BO, CO) after the star-star connection of composition three-phase, a neutral point (O) is through a residual voltage device winding of body (ON) ground connection, be the N end ground connection of a winding of residual voltage device body (ON), secondary winding (the ao of A～C voltage device body, bo, co) after the formation star-star connection, secondary neutral (o) is through basic secondary winding (on) ground connection of residual voltage device body, and promptly the n of the basic secondary winding (on) of residual voltage device body holds ground connection again; Above-mentioned each components and parts are through the disposable integrative-structure that is sealed to of insulation material, and integral installation is on a grooved base (6), and the part that envelope is put voltage device body (1) is main insulation body (11).
2. by the totally-enclosed anti-ferro resonance threephase potential transformer of the described outdoor dry type of claim 1; it is characterized in that: the secondary side of described residual voltage device body also is provided with ground connection supervision secondary winding (da-dn); wherein dn holds ground connection; between the da termination of ground connection supervision secondary winding (da-dn) and dn termination, be provided with a protection relay (J), or da termination and dn termination are connected to directly in the failure monitoring device.
3. by the totally-enclosed anti-ferro resonance threephase potential transformer of the described outdoor dry type of claim 1, it is characterized in that: described primary connection terminal envelope places in the High-Voltage Insulation post (3), be distributed in the upper surface of main insulation body (11), the outside of a High-Voltage Insulation post (3) and main insulation body (11) outer surface of upper are rainproof full skirt (12).
4. by the totally-enclosed anti-ferro resonance threephase potential transformer of the described outdoor dry type of claim 1, it is characterized in that: described secondary connection box (5) is provided with several secondary line outlets (8), slit cable end socket (9) shutoff between secondary line and the secondary line outlet (8), this secondary connection box (5) is provided with the box cover, by the screw and secondary connection box (5) sealing of band lead sealing.
5. by the totally-enclosed anti-ferro resonance threephase potential transformer of the described outdoor dry type of claim 1, it is characterized in that: the upper surface of described main insulation body (11) is inclined-plane (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520092187 CN2817020Y (en) | 2005-08-17 | 2005-08-17 | Outdoor dry type totally-enclosed anti-ferromagnetic resonance three-phase voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520092187 CN2817020Y (en) | 2005-08-17 | 2005-08-17 | Outdoor dry type totally-enclosed anti-ferromagnetic resonance three-phase voltage transformer |
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| Publication Number | Publication Date |
|---|---|
| CN2817020Y true CN2817020Y (en) | 2006-09-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520092187 Expired - Lifetime CN2817020Y (en) | 2005-08-17 | 2005-08-17 | Outdoor dry type totally-enclosed anti-ferromagnetic resonance three-phase voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2817020Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101308725B (en) * | 2007-05-16 | 2010-05-19 | 大连北方互感器有限公司 | Dry-type voltage inductor for metering cart user |
| CN102226974A (en) * | 2011-03-28 | 2011-10-26 | 江西赣电电气有限公司 | Voltage transformer capable of eliminating ferromagnetic resonance |
| CN108447667A (en) * | 2018-05-04 | 2018-08-24 | 卓维电力科技有限公司 | A kind of safe voltage transformer |
| CN108648900A (en) * | 2018-06-02 | 2018-10-12 | 湖北大二互科技股份有限公司 | Ring main unit antiresonance type three-phase and four-line type voltage transformer |
-
2005
- 2005-08-17 CN CN 200520092187 patent/CN2817020Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101308725B (en) * | 2007-05-16 | 2010-05-19 | 大连北方互感器有限公司 | Dry-type voltage inductor for metering cart user |
| CN102226974A (en) * | 2011-03-28 | 2011-10-26 | 江西赣电电气有限公司 | Voltage transformer capable of eliminating ferromagnetic resonance |
| CN102226974B (en) * | 2011-03-28 | 2012-07-25 | 江西赣电电气有限公司 | Voltage transformer capable of eliminating ferromagnetic resonance |
| CN108447667A (en) * | 2018-05-04 | 2018-08-24 | 卓维电力科技有限公司 | A kind of safe voltage transformer |
| CN108648900A (en) * | 2018-06-02 | 2018-10-12 | 湖北大二互科技股份有限公司 | Ring main unit antiresonance type three-phase and four-line type voltage transformer |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150817 Granted publication date: 20060913 |
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| EXPY | Termination of patent right or utility model |