CN2888710Y - Neutral point protector for 110KV or 220KV transformer - Google Patents
Neutral point protector for 110KV or 220KV transformer Download PDFInfo
- Publication number
- CN2888710Y CN2888710Y CN 200620031290 CN200620031290U CN2888710Y CN 2888710 Y CN2888710 Y CN 2888710Y CN 200620031290 CN200620031290 CN 200620031290 CN 200620031290 U CN200620031290 U CN 200620031290U CN 2888710 Y CN2888710 Y CN 2888710Y
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- China
- Prior art keywords
- electrode bar
- neutral point
- protective device
- transformer
- electrode
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Abstract
The utility model relates to a transformer protection device, in particular to a neutral point protection device used in the transformers of 110KV or 220KV, which comprises a pole with a certain distance, a disconnecting switch, a current transformer and a relay protection device connected with the terminal of the current transformer. The clearances of the stick electrode are not arranged vertical and the terminals of the stick electrode are curve. At least a stick electrode is arranged with clearance distance adjusting structure, wherein a terminal of one of the stick electrodes is connected with the disconnecting switch or the top of the arrester. Another stick electrode penetrates the current transformer and is fixed on the bracket. With no vertical arrangement, the terminals of this device overcomes the gas short-circuit or clearance distance cut resulting from the rain or snow. The current transformer is a dry type totally enclosed structure, reaching the preservation-free degree. Adjustable stick clearance distance and terminals of global structure guarantee the even and steady discharge voltage, safe usage, and convenient installation and maintaining.
Description
One, technical field
The utility model relates to a kind of protection equipment for transformer, particularly relates to a kind of 110KV of being used for or 220KV transformer neutral point protective device.
Two, background technology
Transformer is in running; when lightning wave immerses transformer station to transformer neutral point and system's individual event ground connection, open-phase operation from circuit; when particularly supervening static exciter inductance and line mutual-ground capacitor resonance; can produce higher lightning overvoltage or power frequency steady-state overvoltage; transformer neutral point is constituted a threat to; even make insulation breakdown; for preventing that the overvoltage that atmospheric over-voltage, switching overvoltage and transformer high-voltage side single-phase earthing cause from destroying neutral point insulation, need the neutral point protection device.
Traditional neutral point protection device is: transformer neutral point voltage is drawn with angle steel from transformer neutral point isolating switch top, introduces the earth by top sparking electrode, discharging gap, bottom sparking electrode, current transformer, earth electrode.Its shortcoming is: (1) electrode tip is the point discharge form, and discharge voltage is dispersed big; (2) electrode gap is a vertical in form, may shorten owing to current or silver thaw cause gap shorting or clearance distance when sleety weather, causes misoperation; (3) structural stability is poor, can swing at wind-force effect bottom electrode, causes clearance distance to become big; (4) current transformer is an oil immersed type, and lower electrode is directly installed on the binding post of current transformer, and poor stability damages the binding post sealing under external force easily, causes the instrument transformer leakage of oil; (5) overall structure is a steel construction, needs regularly anticorrosion and maintenance.
Three, summary of the invention
The utility model is overcome that deficiency that prior art exists designs and manufactures simple in structure, it is easy to maintenance to use, easy, safe and reliable transformer neutral point protective device is installed.
The technical solution of the utility model:
A kind of 110KV or 220KV transformer neutral point protective device of being used for; contain the electrode that has certain distance; isolating switch; current transformer, with the protective relaying device that the binding post of current transformer connects, the electrode bar gap is non-perpendicular to the horizontal plane setting; the electrode bar termination is a curved surface; at least one electrode bar is provided with the clearance distance adjusting mechanism, and an end of one of them electrode bar is connected in the top of isolating switch or lightning arrester, and another electrode bar runs through current transformer and is fixed on the support.
Described electrode bar gap is the horizon bar gap, and excellent gap is that " one " font electrode bar and approximate " 7 " font electrode bar are formed, and two electrode tips are coaxial, its with axis error less than 3 millimeters.
The electrode bar clearance distance of 110KV transformer neutral point protective device is 90～130mm; the electrode bar clearance distance of 220KV transformer neutral point protective device is 250～335mm; described curved surface is a hemisphere; or be spherical crown, or be bulb, or be oval hemisphere; oval spherical crown; or be oval bulb, the diameter 10mm≤φ≤100mm of described electrode bar, the radius of curvature of curved surface is 5mm≤R≤50mm.
The radius of described electrode bar equals hemispheroidal radius of curvature, or less than hemispheroidal radius of curvature.
Described excellent clearance distance adjusting mechanism is located on " one " word electrode bar, or be located on approximate " 7 " font electrode bar, on the electrode bar of approximate " 7 " font, also be provided with height, direction adjusting mechanism, run through on the electrode bar of D.C mutual-inductor insulating case is installed, described clearance adjustment mechanism and height, direction adjusting mechanism are " screw mandrel and locknut " formula, or are " screw mandrel and jackscrew " formula.
One end of " one " font electrode bar is connected on the insulator on transformer neutral point isolating switch top, or is connected on the insulator on lightning arrester top, and the current transformer binding post connects the input of protective relaying device.
When one end of electrode bar connected lightning arrester, lightning arrester was the magnetic insulation lightning arrester.
Described current transformer is fixed on the support, and support is fixed on the concrete bar, and support connects earth connection.
Electrode bar termination and electrode bar are for flexibly connecting, and described electrode bar is a stainless steel round bar, or is copper rod.
The beneficial effect that the utility model had
1, electrode adopts non-perpendicular layout, has overcome gap shorting or clearance distance shortening that the sleety weather reason causes; Current transformer is the dry type full-closed structure, reaches non-maintaining grade (6), and operating cost easy for installation is low.
2, for making things convenient for installation and maintenance, excellent gap is an adjustable, reaches optimum efficiency for making discharge, electrode is a spherical structure, guarantees that discharge voltage is even, stable, and spheric electrode is that screw mandrel is connected with electrode bar, electrode tip gets final product if electrode, only takes replacing by flash burn.
3, the whole stainless steel that adopts, deformation can not take place in overall structure under the situation of powerful external force not having, and structural stability is strong, and good looking appearance is corrosion-resistant.
Four, description of drawings
Fig. 1: the A type is used for one of 110KV or 220KV transformer neutral point protective device
Fig. 2: the A type is used for two of 110KV or 220KV transformer neutral point protective device
Fig. 3: Type B is used for 110KV or 220KV transformer neutral point protective device
Fig. 4: the BLQ type is used for 110KV or 220KV transformer neutral point protective device
Fig. 5: be used for one of 110KV or 220KV transformer neutral point protective device clearance adjustment mechanism front view
Fig. 6: Fig. 5 cutaway view
Fig. 7: be used for two of 110KV or 220KV transformer neutral point protective device clearance adjustment mechanism front view
Fig. 8: Fig. 7 cutaway view
Fig. 9: be used for 110KV or 220KV transformer neutral point protective device dome electrode rod termination front view
Figure 10: Fig. 9 cutaway view
Figure 11: be used for 110KV or 220KV transformer neutral point protective device electrical schematic diagram
Five, specific embodiment
Embodiment 1: referring to Fig. 1,5,6,9,10,11, electrode bar 3 is fixedly connected on the insulator 2 of isolating switch 1 among the figure, " one " font electrode bar 3 is provided with the clearance distance adjusting mechanism 4 of screw mandrel 18 and locknut 17 compositions, the termination of " one " font electrode bar 3 and approximate " 7 " font electrode bar 8 is a hemisphere 5,100 millimeters excellent gaps 6 are arranged between the two ends, on approximate " 7 " font electrode bar 8, be provided with the screw mandrel 7 at dismountable termination 5 and rear portion, termination, and insulating case 10 and height are installed at the end of electrode bar 8, direction adjusting mechanism 9 (adjusting mechanism 9 is a screw mandrel locknut formula), it is fixed on the support 12, current transformer 11 is fixed on the support 12, be punching, D.C mutual-inductor 11 is run through in the rear end that promptly has the electrode bar 8 of insulating case 10; The binding post of D.C mutual-inductor 11 connects with binding post on the terminal box 14 by cable 13, and support 12 is fixed on the concrete bar 16 by anchor ear 15, and electrode bar 8 passes through support 12 connection earth connections.
When system has overvoltage or other accident to take place; be that overvoltage value is when surpassing gap discharge voltage; by sparking electrode rod 3 and 8 gap discharges; electrical discharge arc is with transformer neutral point ground connection; make local earth-free; electrical network changes the useful earthing electric network by arcing ground into, and D.C mutual-inductor exports the current value of measuring to protective relaying device, thereby the realization neutral point is protected automatically.
Embodiment 2: referring to Fig. 2,7,8,9,10,11, the meaning of symbol representative is identical with embodiment one among the figure, no longer repeats, and difference is that clearance adjustment mechanism is that screw mandrel 18 and jackscrew 19 are formed, and support 12 directly is fixed on the concrete bar 16.
Embodiment 3: referring to Fig. 3,5,6,9,10,11, the meaning of symbol representative is identical with embodiment one among the figure, no longer repeat, difference be on the terminals of isolating switch, connected again lightning arrester 1 ' the top.
Embodiment 4: referring to Fig. 4,5,6,9,10,11, the meaning of symbol representative is identical with embodiment one among the figure, no longer repeat, difference be electrode bar 3 be connected in lightning arrester 1 ' the top.
Claims (9)
1, a kind of 110KV or 220KV transformer neutral point protective device of being used for; contain the electrode that has certain distance; isolating switch; current transformer; the protective relaying device that connects with the binding post of current transformer; it is characterized in that: the electrode bar gap is non-perpendicular to the horizontal plane setting; the electrode bar termination is a curved surface; at least one electrode bar is provided with the clearance distance adjusting mechanism; one end of one of them electrode bar is connected in the top of isolating switch or lightning arrester, and another electrode bar runs through current transformer and is fixed on the support.
2, transformer neutral point protective device according to claim 1; it is characterized in that: described electrode bar gap is the horizon bar gap; the rod gap be " one " font electrode bar and approximate " 7 " font electrode bar composition, and two electrode tips are coaxial, its with axis error less than 5 millimeters.
3, transformer neutral point protective device according to claim 1; it is characterized in that: the electrode bar clearance distance of 110KV transformer neutral point protective device is 90～130mm; the electrode bar clearance distance of 220KV transformer neutral point protective device is 250～335mm, and described curved surface is a hemisphere, or is spherical crown; or be bulb; or be oval hemisphere, oval spherical crown, or be oval bulb; diameter 10mm≤φ≤the 100mm of described electrode bar, the radius of curvature of curved surface is 5mm≤R≤50mm.
4, transformer neutral point protective device according to claim 3, it is characterized in that: the radius of described electrode bar equals hemispheroidal radius of curvature, or less than hemispheroidal radius of curvature.
5, transformer neutral point protective device according to claim 2; it is characterized in that: described excellent clearance distance adjusting mechanism is located on " one " word electrode bar; or be located on approximate " 7 " font electrode bar; on the electrode bar of approximate " 7 " font, also be provided with height, direction adjusting mechanism; run through on the electrode bar of D.C mutual-inductor insulating case is installed; described clearance adjustment mechanism and height, direction adjusting mechanism are " screw mandrel and locknut " formula, or are " screw mandrel and jackscrew " formula.
6, transformer neutral point protective device according to claim 2; it is characterized in that: an end of " one " font electrode bar is connected on the insulator on transformer neutral point isolating switch top; or be connected on the insulator on lightning arrester top, the current transformer binding post connects the input of protective relaying device.
7, transformer neutral point protective device according to claim 1 is characterized in that: when an end of electrode bar connected lightning arrester, lightning arrester was the magnetic insulation lightning arrester.
8, transformer neutral point protective device according to claim 1, it is characterized in that: described current transformer is fixed on the support, and support is fixed on the concrete bar, and support connects earth connection.
9, according to the described transformer neutral point protective device of the arbitrary claim of claim 1～8, it is characterized in that: electrode bar termination and electrode bar are for flexibly connecting, and described electrode bar is a stainless steel round bar, or is copper rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620031290 CN2888710Y (en) | 2006-03-06 | 2006-03-06 | Neutral point protector for 110KV or 220KV transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620031290 CN2888710Y (en) | 2006-03-06 | 2006-03-06 | Neutral point protector for 110KV or 220KV transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2888710Y true CN2888710Y (en) | 2007-04-11 |
Family
ID=38047281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620031290 Expired - Fee Related CN2888710Y (en) | 2006-03-06 | 2006-03-06 | Neutral point protector for 110KV or 220KV transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2888710Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101621185B (en) * | 2009-06-15 | 2011-07-20 | 上海安越电气工程技术有限公司 | Transformer neutrality point combination electric device |
| CN103323759A (en) * | 2013-06-26 | 2013-09-25 | 深圳供电局有限公司 | Test platform of parallel protective gap of transformer neutral point |
| CN103414158A (en) * | 2013-08-22 | 2013-11-27 | 深圳供电局有限公司 | Novel bar-plate-bar protective gap device for protecting transformer neutral point |
| CN103414157A (en) * | 2013-08-22 | 2013-11-27 | 深圳供电局有限公司 | Device for operation of protective gap of transformer neutral point |
| CN103944070A (en) * | 2014-04-11 | 2014-07-23 | 都匀供电局 | Simple overvoltage protection device |
| CN117334512A (en) * | 2023-10-13 | 2024-01-02 | 登高电气有限公司 | High-voltage isolating switch |
-
2006
- 2006-03-06 CN CN 200620031290 patent/CN2888710Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101621185B (en) * | 2009-06-15 | 2011-07-20 | 上海安越电气工程技术有限公司 | Transformer neutrality point combination electric device |
| CN103323759A (en) * | 2013-06-26 | 2013-09-25 | 深圳供电局有限公司 | Test platform of parallel protective gap of transformer neutral point |
| CN103414158A (en) * | 2013-08-22 | 2013-11-27 | 深圳供电局有限公司 | Novel bar-plate-bar protective gap device for protecting transformer neutral point |
| CN103414157A (en) * | 2013-08-22 | 2013-11-27 | 深圳供电局有限公司 | Device for operation of protective gap of transformer neutral point |
| CN103414157B (en) * | 2013-08-22 | 2016-06-08 | 深圳供电局有限公司 | A kind of device of operation of protective gap of transformer neutral point |
| CN103414158B (en) * | 2013-08-22 | 2016-09-21 | 深圳供电局有限公司 | A kind of New bar plate rod portable protective gaps device protecting transformer neutral point |
| CN103944070A (en) * | 2014-04-11 | 2014-07-23 | 都匀供电局 | Simple overvoltage protection device |
| CN117334512A (en) * | 2023-10-13 | 2024-01-02 | 登高电气有限公司 | High-voltage isolating switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070411 |