CN201829260U - 330KV mutual inductor hollow porcelain insulator - Google Patents
330KV mutual inductor hollow porcelain insulator Download PDFInfo
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- CN201829260U CN201829260U CN2010205365042U CN201020536504U CN201829260U CN 201829260 U CN201829260 U CN 201829260U CN 2010205365042 U CN2010205365042 U CN 2010205365042U CN 201020536504 U CN201020536504 U CN 201020536504U CN 201829260 U CN201829260 U CN 201829260U
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- hollow porcelain
- insulator
- instrument transformer
- upper flange
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Abstract
The utility model relates to an insulator, which belongs to the technical field of electric power transmission components, in particular to a mutual inductor hollow porcelain insulator applicable to a 330KV super-high-voltage power transmission system. The mutual inductor hollow porcelain insulator mainly comprises a hollow porcelain insulation member, a sealing layer, an upper flange, a lower flange and a mutual inductor arranged in a hollow part inside the hollow porcelain insulation member, wherein a primary loop of the mutual inductor is connected with the upper flange, and a second loop is insulated from the upper flange. The insulator has strong insulation performance, large creepage distance and high safety and is simple to manufacture.
Description
Technical field
The utility model relates to a kind of insulator, and especially a kind of hollow porcelain insulator of instrument transformer that is applicable in the 330KV extra-high voltage transmission belongs to electric power transfer unit technical field.
Background technology
Insulator is commonly called as porcelain vase, is the insulator that is used for supporting lead.It can guarantee that lead and cross-arm, shaft tower have enough insulation, thereby is widely used in the overhead type transmission system.Because it is in operation and not only needs to bear the loading of lead vertical direction and the pulling force of horizontal direction, and need stand Exposure to Sunlight, drench with rain, the corrosion of climate change and chemical substance, therefore, insulator should have good electric property, and enough mechanical strengths are arranged again.
In order in time to grasp line voltage, the current running condition in high pressure and even the extra-high voltage transmission, usually adopt the measuring instrument that inserts in the transmission system that line voltage, electric current are directly monitored in the prior art, but has following defective: 1, the line voltage of transmission system, electric current are all very high, especially the Northwest of China's length and breadth of land, usually adopt the extra-high voltage transmission of 330KV, measuring instrument has been proposed acid test; 2, different transmission systems, its line voltage, electric current are often different, and often range is also inequality for the measuring instrument of so feasible monitoring usefulness, does not possess versatility; 3, measuring instrument directly inserts superhigh pressure, electric current transmission system, is difficult to guarantee instrument self and even surveying work personnel's safety; 4, can't reflect earth fault.
Therefore, can be by common parts---the insulator in the existing transmission system, by transformation to the composition of insulator, material and even assembling, make it when possessing original support wire, insulating effect, realization is to the monitoring of transmission system, and overcome above-mentioned defective, for those skilled in the art have opened up brand-new thinking.
The utility model content
In order to solve the problems of the technologies described above, the utility model aims to provide the hollow porcelain insulator of a kind of 330KV instrument transformer, it can be under the prerequisite of keeping the insulator existing capability, pass through architecture advances, can monitor the voltage of superhigh pressure (for example 330KV) transmission of electricity electrical network, and overcome exist in the prior art to measuring instrument require too high, versatility is bad, fail safe is lower, can't monitor drawback such as earth fault.Its technical scheme that adopts is as follows:
The hollow porcelain insulator of this 330KV instrument transformer mainly comprises: hollow porcelain insulating spare, sealant, upper flange, lower flange and place instrument transformer in the described hollow porcelain insulating spare boring, and the primary circuit of described instrument transformer is connected with described upper flange, and secondary circuit insulate with it.
Preferably, described sealant is a silicon rubber.
Preferably, this insulator also comprises adhesive, and it places the mucilage binding part of described upper flange and described hollow porcelain insulating spare and the mucilage binding part of described lower flange and described hollow porcelain insulating spare.
Preferably, described instrument transformer comprises hold-down nut, metal bar, becket, plain conductor, monitoring terminal and following hold-down nut.
Preferably, the realization of described upward hold-down nut is connected with described upper flange, and the realization of described hold-down nut down is connected with described lower flange, and the described hold-down nut lower end of going up connects described metal bar, and described becket is vertically passed in described metal bar lower end, the two insulation.
Preferably, described becket is received described monitoring terminal by described plain conductor, and described monitoring terminal is loaded on the outer surface of described hollow porcelain insulating spare.
Compared with prior art, the utlity model has following advantage:
1, insulation level height: through evidence, its 1min power-frequency withstand voltage can reach 640kV, and the switching impulse withstand voltage can reach 1120kV, and lightning impulse withstand voltage 50 μ s peak values can reach 1390kV.
2, creepage bigger than distance: through evidence, the creepage of-0.005H product can reach 27.5kV/min than distance;-0.075H and-0.01H product creepage than apart from up to 31kV/min.
3, fail safe is higher: its high voltage with the primary circuit (extra-high pressure) becomes the low-voltage (for example 100V) of secondary circuit, the big electric current of primary circuit becomes the little electric current (5A) of secondary circuit, measuring instrument only inserts secondary circuit, implement electrical isolation with primary circuit high voltage and big electric current, thereby guaranteed the safety of surveying work personnel and instrumentation.
4, the measuring instrument versatility is good: it can make the measuring instrument manufacturer's standardization after adopting instrument transformer, and need not design instrument by measured voltage height and size of current.
5, take out zero sequence power supply, component of voltage for the protective relaying device use, can reflect earth fault.
Description of drawings
Fig. 1: the half sectional view of the hollow porcelain insulator of 330KV instrument transformer of the present utility model (the first half is an external view, and the latter half is a cutaway view);
Fig. 2: the schematic diagram of instrument transformer 6 shown in Figure 1;
Fig. 3: the dimensional drawing of the hollow porcelain insulator of 330KV instrument transformer of the present utility model.
Among the figure: 1, hollow porcelain insulating spare; 2, sealant; 3, upper flange; 4, adhesive; 5, lower flange; 6, instrument transformer; 7, go up hold-down nut; 8, metal bar; 9, becket; 10, plain conductor; 11, monitoring terminal; 12, following hold-down nut.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and example:
An embodiment of the present utility model as shown in Figure 1, the figure shows a hollow porcelain insulator of 330KV instrument transformer amplification vertical half sectional view, wherein the first half is an external view, the latter half is a cutaway view, below will explain detailedly.
This insulator can be used for extra-high voltage transmission, especially the 330KV transmission system in NORTHWEST CHINA area, it mainly comprises: hollow porcelain insulating spare 1, sealant 2, upper flange 3, lower flange 5 and place instrument transformer 6 in hollow porcelain insulating spare 1 boring, and the primary circuit of instrument transformer 6 is connected with upper flange, and secondary circuit insulate with it.
Hollow porcelain insulating spare 1 can adopt C120.
Sealant 2 is used to realize the sealing property of this insulator integral body, for example adopts silicon rubber.
Upper flange 3, lower flange 5 all are used for the installation of this insulator, adopt light weight and possess the metal of certain intensity, for example adopt aluminium alloy ZL114A.
This insulator can also comprise adhesive 4, place upper flange 3 and the mucilage binding part of hollow porcelain insulating spare 1 and the mucilage binding part of lower flange 5 and hollow porcelain insulating spare 1, play bonding flange and hollow porcelain insulating spare 1, make its effect that becomes one, for example adopt the 525# portland cement as cement glue.
As shown in Figure 2, described instrument transformer 6 comprises hold-down nut 7, metal bar 8, becket 9, plain conductor 10, monitoring terminal 11, following hold-down nut 12, wherein, last hold-down nut 7 realizations are connected with upper flange 3, and following hold-down nut 12 is realized being connected with lower flange 5, and last hold-down nut 7 lower ends connect metal bar 8, becket 9 is vertically passed in metal bar 8 lower ends, the two insulation, becket 9 is received monitoring terminal 11 by plain conductor 10, and monitoring terminal 11 is loaded on the outer surface of hollow porcelain insulating spare 1.
This insulator each several part is of a size of:
| H | 2850mm | d1 | 300mm |
| D | 655mm | d2 | 13mm |
| D1 | 610mm | d3 | 13mm |
| D2 | 440mm | n | 24 |
| d | 400mm | n1 | 12 |
Below operation principle of the present utility model and concrete enforcement are explained the main points briefly.
The hollow porcelain insulating spare of built-in instrument transformer and the mucilage binding position of upper and lower flange are brushed resilient coating, with cement glue upper and lower flange and hollow porcelain insulating spare are connect with fixed attention then, the finally sealed layer is coated silicon rubber and is formed this insulator; Upper flange is inserted the electrical network of 330KV transmission system; lower flange is fixed on the strutting piece; the 330KV extra-high pressure appears on metal bar (being the primary circuit); and because the capacitive sensing between metal bar and the becket; go up the generation low-voltage signal at becket (being secondary circuit); for example be low-voltage, the low current of 100V, 5A; and be sent to the monitoring terminal; connect devices such as charged demonstration, nuclear phase, relaying protection; from low-voltage signal, extract zero sequence power supply, component of voltage etc., carry out corresponding monitoring and handle.
Evidence: the minimum creep distance of this insulator can reach 9075mm, and bending failure load is not less than 12kNm, hydraulic test 1.5MPa/min one by one, and hydraulic pressure destroys load and is not less than 3MPa/min, function admirable.
With way of example the utility model is illustrated above, but the utility model is not limited to above-mentioned specific embodiment, all any change or modification of doing based on the utility model all belong to the claimed scope of the utility model.
Claims (6)
1. hollow porcelain insulator of 330KV instrument transformer, it is characterized in that, comprise: hollow porcelain insulating spare (1), sealant (2), upper flange (3), lower flange (5) and place instrument transformer (6) in described hollow porcelain insulating spare (1) boring, and the primary circuit of described instrument transformer (6) is connected with described upper flange (3), and secondary circuit insulate with it.
2. the hollow porcelain insulator of 330KV instrument transformer according to claim 1 is characterized in that described sealant (2) is a silicon rubber.
3. the hollow porcelain insulator of 330KV instrument transformer according to claim 1, it is characterized in that, this insulator also comprises adhesive (4), and it places described upper flange (3) and the mucilage binding part of described hollow porcelain insulating spare (1) and the mucilage binding part of described lower flange (5) and described hollow porcelain insulating spare (1).
4. the hollow porcelain insulator of 330KV instrument transformer according to claim 1, it is characterized in that described instrument transformer (6) comprises hold-down nut (7), metal bar (8), becket (9), plain conductor (10), monitoring terminal (11) and following hold-down nut (12).
5. the hollow porcelain insulator of 330KV instrument transformer according to claim 4, it is characterized in that, the realization of described upward hold-down nut (7) is connected with described upper flange (3), the realization of described hold-down nut (12) down is connected with described lower flange (5), described hold-down nut (7) lower end of going up connects described metal bar (8), described becket (9), the two insulation are vertically passed in described metal bar (8) lower end.
6. the hollow porcelain insulator of 330KV instrument transformer according to claim 4, it is characterized in that, described becket (9) is received described monitoring terminal (11) by described plain conductor (10), and described monitoring terminal (11) is loaded on the outer surface of described hollow porcelain insulating spare (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205365042U CN201829260U (en) | 2010-09-20 | 2010-09-20 | 330KV mutual inductor hollow porcelain insulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205365042U CN201829260U (en) | 2010-09-20 | 2010-09-20 | 330KV mutual inductor hollow porcelain insulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201829260U true CN201829260U (en) | 2011-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205365042U Expired - Fee Related CN201829260U (en) | 2010-09-20 | 2010-09-20 | 330KV mutual inductor hollow porcelain insulator |
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| Country | Link |
|---|---|
| CN (1) | CN201829260U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102254646A (en) * | 2011-05-13 | 2011-11-23 | 浙江华高电气有限公司 | Hollow composite insulator for ultrahigh-voltage direct-current equipment |
-
2010
- 2010-09-20 CN CN2010205365042U patent/CN201829260U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102254646A (en) * | 2011-05-13 | 2011-11-23 | 浙江华高电气有限公司 | Hollow composite insulator for ultrahigh-voltage direct-current equipment |
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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: 20110511 Termination date: 20120920 |