CN2735626Y - An over-voltage protector for aerial insulated line - Google Patents
An over-voltage protector for aerial insulated line Download PDFInfo
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- CN2735626Y CN2735626Y CN 200420037225 CN200420037225U CN2735626Y CN 2735626 Y CN2735626 Y CN 2735626Y CN 200420037225 CN200420037225 CN 200420037225 CN 200420037225 U CN200420037225 U CN 200420037225U CN 2735626 Y CN2735626 Y CN 2735626Y
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- overvoltage protection
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Abstract
The utility model discloses a lightning protection device, in particular to an over-voltage protector for aerial insulated wire. The over-voltage protector for aerial insulated line is composed of an insulator fixed to the aerial insulated wire with the binding thread, a non-linear current limiter fixed to the insulator with the mounting frame, and a draining ring fixed to the top of the non-linear current limiter. Wherein, the non-linear current limiter adopts the compounded outer sleeve arrester, concretely compising a resistance valve sheet coated by the silicon rubber insulation outer sleeve, an upper electrode and a lower electrode of the current limiting elements positioned at the two ends of the resistance valve sheet. The draining ring is sheathed in the middle part of the insulator but is not contacted with the insulator, and the gap between the draining ring and the aerial insulated wire is 80 mm. The utility model solves the problem of long running reliability existing in the original arrester itself and fundamentally eliminates the exploding danger of the arrester outer sleeve.
Description
Technical field
The utility model relates to a kind of lightning protection device, relates in particular to a kind of insulated overhead line overvoltage protection.
Background technology
Present existing insulated overhead line overvoltage protection, by being fixed on the insulator on the suspended insulated guide wire with binding wire and being fixed on non-linear flow restricter on the insulator with mounting bracket, and the drainage ring that is fixed on non-linear flow restricter top is formed.Because its drainage ring is installed in the insulator bottom, the gap between suspended insulated guide wire is very little, and non-linear flow restricter adopts insulator zinc oxide arrester, the as easy as rolling off a log blast of lightning arrester overcoat.
Summary of the invention
The utility model has overcome deficiency of the prior art, and a kind of insulated overhead line overvoltage protection that can solve the long-time running integrity problem of lightning arrester existence itself is provided.
The purpose of this utility model is finished by following technical solution:
Insulated overhead line overvoltage protection after the improvement still comprises insulator, non-linear flow restricter, and the drainage ring.
Non-linear flow restricter adopts composite sheath metal zinc oxide lightning arrester, comprises the resistor valve sheet of composite silicone rubber insulating coating parcel, and the bottom electrode of the current limiting element of the top electrode of the current limiting element of resistor valve sheet two ends connection drainage ring and connection support.
Compared with prior art, the utility model has solved the long-time running integrity problem that original lightning arrester itself exists, and fundamentally eliminates the danger of lightning arrester overcoat blast.It is in addition outer: advantages such as in light weight, volume is little, and anti-pollution characteristic is good, and heat dissipation characteristics is good, and manufacturing process is simple.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 overlooks the section perspective view for Fig. 1.
Fig. 3 analyses and observe enlarged diagram for non-linear flow restricter among Fig. 1.
Among Fig. 1: 1 is suspended insulated guide wire, and 2 is binding wire, and 3 is insulator, and 4 is stainless steel drainage ring, and 5 is non-linear flow restricter, and 10 is mounting bracket; Among Fig. 3: 6 is the top electrode of current limiting element, and 7 is resistor valve sheet, and 8 is the bottom electrode of current limiting element, and 9 is insulating coating.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail.
Specific embodiment 1: non-linear flow restricter 5 usefulness mounting brackets 10 are fixed on the insulator 3, and a stainless steel drainage ring 4 is fixed on the top of non-linear flow restricter 5.Stainless steel drainage ring 4 is sleeved on insulator 3 middle parts, but does not contact with insulator.Gap between stainless steel drainage ring 4 and the suspended insulated guide wire 1 is 35mm.Non-linear flow restricter 5 adopts composite sheath metal zinc oxide lightning arrester, by the zinc oxide valve plate 7 of composite silicone rubber insulating coating 9 parcels, and the bottom electrode 8 of the current limiting element of the top electrode 6 of the current limiting element of 7 two sections connections of zinc oxide valve plate stainless steel drainage ring 4 and connection support 10 is formed.
Specific embodiment 2: non-linear flow restricter 5 usefulness mounting brackets 10 are fixed on the insulator 3, and a stainless steel drainage ring 4 is fixed on the top of non-linear flow restricter 5.Stainless steel drainage ring 4 is sleeved on insulator 3 middle parts, but does not contact with insulator.Gap between stainless steel drainage ring 4 and the suspended insulated guide wire 1 is 80mm.Non-linear flow restricter 5 adopts composite sheath metal lightning arrester, by the resistor valve sheet 7 of composite silicone rubber insulating coating 9 parcels, and the bottom electrode 8 of the current limiting element of the top electrode 6 of the current limiting element of 7 two sections connections of resistor valve sheet stainless steel drainage ring 4 and connection support 10 is formed.
Specific embodiment 3: non-linear flow restricter 5 usefulness mounting brackets 10 are fixed on the insulator 3, and a stainless steel drainage ring 4 is fixed on the top of non-linear flow restricter 5.Stainless steel drainage ring 4 is sleeved on insulator 3 middle parts, but does not contact with insulator.Gap between stainless steel drainage ring 4 and the suspended insulated guide wire 1 is 80mm.Non-linear flow restricter 5 adopts the composite sheath zinc oxide arrester, by the zinc oxide valve plate 7 of composite silicone rubber insulating coating 9 parcels, and the bottom electrode 8 of the current limiting element of the top electrode 6 of the current limiting element of 7 two sections connections of zinc oxide valve plate stainless steel drainage ring 4 and connection support 10 is formed.
Specific embodiment 4: non-linear flow restricter 5 usefulness mounting brackets 10 are fixed on the insulator 3, and a stainless steel drainage ring 4 is fixed on the top of non-linear flow restricter 5.Stainless steel drainage ring 4 is sleeved on insulator 3 middle parts, but does not contact with insulator.Gap between stainless steel drainage ring 4 and the suspended insulated guide wire 1 is 80mm.Non-linear flow restricter 5 adopts composite sheath carborundum lightning arrester, by the carborundum valve block 7 of composite silicone rubber insulating coating 9 parcels, and the bottom electrode 8 of the current limiting element of the top electrode 6 of the current limiting element of 7 two sections connections of carborundum valve block stainless steel drainage ring 4 and connection support 10 is formed.
Specific embodiment 5: non-linear flow restricter 5 usefulness mounting brackets 10 are fixed on the insulator 3, and a stainless steel drainage ring 4 is fixed on the top of non-linear flow restricter 5.Stainless steel drainage ring 4 is sleeved on insulator 3 middle parts, but does not contact with insulator.Gap between stainless steel drainage ring 4 and the suspended insulated guide wire 1 is 85mm.Non-linear flow restricter 5 adopts composite sheath metal zinc oxide lightning arrester, by the zinc oxide valve plate 7 of composite silicone rubber insulating coating 9 parcels, and the bottom electrode 8 of the current limiting element of the top electrode 6 of the current limiting element of 7 two sections connections of zinc oxide valve plate stainless steel drainage ring 4 and connection support 10 is formed.
Operation principle of the present utility model is: when insulated overhead line 1 had lightning current, the high pressure of lightning current at first caused insulator arc-over, and punctured the series gap between wire insulation and the drainage ring 4, guided lightning current into non-linear flow restricter 5.Because non-linear flow restricter 5 is non-linear, its thunder and lightning residual voltage is limited on the power-frequency overvoltage, and cuts off the power frequency continued flow that lightning current causes, prevented the generation of suspended insulated guide wire circuit lightning-caused breaking accident.The use of polymeric housed metal oxide arrester, arrange in the gap between drainage ring and the suspended insulated guide wire, has solved the long-time running integrity problem that original lightning arrester itself exists, and fundamentally eliminates the danger of lightning arrester overcoat blast.
With specific embodiment 1 is experimental subjects, and main test data is as follows:
1. the residual voltage under the nominal discharge current (5kA)
Under the effect of 8/20us nominal impulse current 5kA, the residual voltage of protector is 35.66kV, shown in chart 1.Satisfy the requirement of technical indicator.
The residual voltage of table 1 overvoltage protection device lightning arrester
| Test number (TN) | The wave head time (us) | The half-peak value time (us) | Current amplitude (kA) | Residual voltage (kV) |
| 1 | 7.51 | 22.0 | 4.8 | 35.48 |
| 2 | 7.43 | 21.9 | 4.9 | 35.41 |
| 3 | 7.38 | 21.8 | 5.0 | 35.66 |
| 4 | 7.41 | 21.9 | 5.1 | 35.67 |
| 5 | 7.46 | 21.6 | 5.3 | 35.68 |
| 6 | 7.40 | 21.5 | 5.5 | 35.66 |
2. overvoltage protection device series gap power-frequency sparkover voltage (effective value kV)
Overvoltage protection device series gap power-frequency sparkover voltage result of the test is specifically as shown in table 2.
The asymmetric installation of drainage ring of table 2 protector series gap is to the influence of its power-frequency sparkover voltage
| The drainage ring is installed the symmetry situation | Protector series gap power-frequency sparkover voltage (effective value kV) | |||||
| The | ||||||
| 1 | 2 | 3 | 4 | 5 | 6 | |
| Symmetry is installed, drainage ring and insulator post concentric, and be 2.5cm between the two apart | 64 | 67 | 63 | 65 | 66 | 65 |
| Asymmetric installation, drainage ring and insulator post one side are at a distance of 1.5cm, and opposite side is at a distance of 3.0cm | 62 | 59 | 63 | 59 | 63 | 61 |
| Asymmetric installation, drainage ring and insulator post one side are at a distance of 1.0cm, and opposite side is at a distance of 3.5cm | 58 | 57 | 59 | 59 | 61 | 60 |
Obviously, even seriously be asymmetric with at stainless steel drainage ring under the situation of insulator post (not concentric) installation, power-frequency sparkover voltage still can satisfy the requirement greater than 50kV.In addition, also as can be seen, the asymmetric installation of stainless steel drainage ring can't have a strong impact on its power-frequency sparkover voltage, and it only can make power-frequency sparkover voltage a little decline occur.
3. overvoltage protection device series gap front of wave impulse sparkover voltage
Actual measurement shows that its front of wave impulse sparkover voltage satisfies the technical requirement less than 200kV shown in chart 3.
Table 3 overvoltage protection device series gap front of wave impulse sparkover voltage
| Test number (TN) | The wave head time (us) | Time to chopping (us) | Front of wave impulse sparkover voltage (kV) |
| 1 | 0.53 | 1.1 | 187.6 |
| 2 | 0.57 | 1.1 | 189.8 |
| 3 | 0.53 | 1.1 | 188.5 |
| 4 | 0.53 | 1.1 | 189.3 |
| 5 | 0.55 | 1.1 | 188.1 |
| 6 | 0.73 | 1.3 | 190.3 |
4. overvoltage protection device series gap 1.2/50us impulse sparkover voltage
Actual measurement shows that the 1.2/50us impulse sparkover voltage of protector series gap satisfies the requirement of technical indicator between 98～110kV.The result of concrete 6 tests is as shown in table 10.In fact, the desired requirement less than 110kV of technical indicator also is irrational, and some is higher, because press standard-required, 50% thunder discharge voltage of PS105 insulator post also only is 105kV, will occur the un-reasonable phenomenon of series gap lightning impulse discharge voltage high-tension insulator post like this.In fact, this 1.2/50us impulse sparkover voltage index should be chosen less than 90kV (105/1.2=87.5kV), but considers that the spacing that the lead sag may cause descends, and this impulse sparkover voltage also is should be no more than 100kV for well.
Table 4 overvoltage protection device series gap 1.2/50us lightning impulse discharge voltage
| Test number (TN) | The wave head time (us) | Breakdown time (us) | Lightning impulse discharge voltage (kV) |
| 1 | 1.27 | 8.4 | 98.5 |
| 2 | 1.27 | 6.9 | 99.2 |
| 3 | 1.28 | 7.8 | 100.6 |
| 4 | 1.28 | 7.4 | 102.3 |
| 5 | 1.28 | 4.3 | 106.1 |
| 6 | 1.27 | 3.4 | 110.3 |
5. overvoltage protection device series gap 250/2500us switching impulse sparkover voltage
Overvoltage protection device will be subjected to the influence of switching overvoltage inevitably in the process of coming into operation.For the 10kV system, the most serious situation is the existing single phase ground fault of system before cut-offfing, and produces overvoltage when using general breaker operator and may surpass 4.0p.u, i.e. 39kV.That is to say that under maximum switching overvoltage 39kV, series gap can not be breakdown, overvoltage protection device should not move.
Actual measurement shows that the 250/2500us impulse sparkover voltage of protector series gap is between 95～97kV, and is big more than maximum switching overvoltage 39kV.The result of concrete 6 tests is as shown in table 5.In fact, under this clearance distance, also there is bigger nargin in the disruptive discharge voltage under its switching overvoltage.
Table 5 overvoltage protection device series gap 250/2500us switching impulse sparkover voltage
| Test number (TN) | The wave head time (us) | Breakdown time (us) | Switching impulse sparkover voltage (kV) |
| 1 | 272 | 482 | 96.4 |
| 2 | 253 | 456 | 96.6 |
| 3 | 278 | 512 | 95.6 |
| 4 | 245 | 489 | 95.4 |
| 5 | 236 | 470 | 95.2 |
| 6 | 256 | 490 | 95.8 |
With specific embodiment 3 is experimental subjects, and main test data is as follows:
1. the residual voltage under the nominal discharge current (5kA)
Under the effect of 8/20us nominal impulse current 5kA, the residual voltage of protector is 49.5kV, and is as shown in table 6.Satisfy the requirement of technical indicator.
Table 6 overvoltage protection device overvoltage residual voltage
| Test number (TN) | The wave head time (us) | The half-peak value time (us) | Current amplitude (kA) | Residual voltage (kV) |
| 1 | 7.55 | 22.2 | 4.9 | 49.3 |
| 2 | 7.66 | 21.9 | 4.9 | 49.0 |
| 3 | 7.76 | 21.6 | 5.0 | 49.5 |
| 4 | 7.45 | 21.7 | 5.1 | 49.6 |
| 5 | 7.48 | 21.8 | 5.2 | 49.6 |
| 6 | 7.43 | 21.4 | 5.2 | 49.8 |
2. overvoltage protection device series gap power-frequency sparkover voltage (effective value kV)
Overvoltage protection device series gap power-frequency sparkover voltage result of the test is specifically as shown in table 7.
Table 7 overvoltage protection device series gap power-frequency sparkover voltage (effective value kV)
| The drainage ring is installed the symmetry situation | Protector series gap power-frequency sparkover voltage (effective value kV) | |||||
| The | ||||||
| 1 | 2 | 3 | 4 | 5 | 6 | |
| Symmetry is installed, drainage ring and insulator post concentric, and be 2.5cm between the two apart | 57 | 58 | 56 | 57 | 57 | 58 |
| Asymmetric installation, drainage ring and insulator post one side are at a distance of 1.5cm, and an other side is at a distance of 3.0cm | 54 | 55 | 55 | 54 | 56 | 55 |
| Asymmetric installation, drainage ring and insulator post one side are at a distance of 1.0cm, and an other side is at a distance of 3.5cm | 53 | 52 | 53 | 54 | 52 | 53 |
3. overvoltage protection device series gap front of wave impulse sparkover voltage
Actual measurement shows that its front of wave impulse sparkover voltage is as shown in table 8, satisfies the technical requirement less than 200kV.
Table 8 overvoltage protection device series gap front of wave impulse sparkover voltage
| Test number (TN) | The wave head time (us) | Time to chopping (us) | Front of wave impulse sparkover voltage (kV) |
| 1 | 0.57 | 1.1 | 166.7 |
| 2 | 0.55 | 1.1 | 168.8 |
| 3 | 0.52 | 1.2 | 165.5 |
| 4 | 0.54 | 1.1 | 166.3 |
| 5 | 0.58 | 1.2 | 168.1 |
| 6 | 0.56 | 1.2 | 163.3 |
4. overvoltage protection device series gap 1.2/50us impulse sparkover voltage
Actual measurement shows that the 1.2/50us impulse sparkover voltage of overvoltage protection device series gap is between 96～99kV.The result of concrete 6 tests is as shown in table 9, satisfies the requirement less than 100kV.
Table 9 overvoltage protection device series gap 1.2/50us impulse sparkover voltage
| Test number (TN) | The wave head time (us) | Breakdown time (us) | Lightning impulse discharge voltage (kV) |
| 1 | 1.26 | 7.6 | 96.5 |
| 2 | 1.25 | 7.3 | 98.6 |
| 3 | 1.26 | 7.5 | 98.7 |
| 4 | 1.25 | 7.1 | 98.2 |
| 5 | 1.24 | 6.7 | 97.4 |
| 6 | 1.26 | 7.5 | 96.5 |
5. overvoltage protection device series gap 250/2500us switching impulse sparkover voltage
Protector will be subjected to the influence of switching overvoltage inevitably in the process of coming into operation.For the 10kV system, the most serious situation is the existing single phase ground fault of system before cut-offfing, and produces overvoltage when using general open-circuit operation and may surpass 4.0p.u, i.e. 39kV.That is to say that under maximum switching overvoltage 39kV, series gap can not be breakdown, protector should not move.
Actual measurement shows that the 250/2500us impulse sparkover voltage of protector series gap is between 80～84kV, and is big more than maximum switching overvoltage 39kV.The result of concrete 6 tests is as shown in table 10.
Table 10 overvoltage protection device series gap 250/2500us switching impulse sparkover voltage
| Test number (TN) | The wave head time (us) | Breakdown time (us) | Switching impulse sparkover voltage (kV) |
| 1 | 271 | 467 | 82.4 |
| 2 | 263 | 487 | 83.6 |
| 3 | 267 | 489 | 81.5 |
| 4 | 273 | 498 | 80.6 |
| 5 | 256 | 481 | 82.2 |
| 6 | 278 | 463 | 81.8 |
At last, it is also to be noted that what more than enumerate only is specific embodiment of the utility model.Obviously, the utility model is not limited to above embodiment, and many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from the disclosed content of the utility model all should be thought protection range of the present utility model.
Claims (10)
1, a kind of insulated overhead line overvoltage protection; comprise with binding wire (2) and be fixed on insulator (3) on the suspended insulated guide wire (1); with the non-linear flow restricter (5) that is fixed on mounting bracket (10) on the insulator (3); and be fixed on the drainage ring (4) on non-linear flow restricter (5) top, it is characterized in that: non-linear flow restricter (5) adopts polymeric housed metal oxide arrester.
2, overvoltage protection according to claim 1 is characterized in that: non-linear flow restricter (5) adopts composite silicone rubber insulating coating lightning arrester.
3, overvoltage protection according to claim 1 and 2 is characterized in that: non-linear flow restricter (5) adopts zinc oxide arrester.
4, overvoltage protection according to claim 1 and 2; it is characterized in that: non-linear flow restricter (5) comprises the resistor valve sheet (7) of insulating coating (9) parcel, reaches the top electrode (6) of the current limiting element at resistor valve sheet (7) two ends, the bottom electrode (8) of current limiting element.
5, overvoltage protection according to claim 4 is characterized in that: the top electrode of current limiting element (6) connects drainage ring (4), the bottom electrode of current limiting element (8) connection support (10).
6, overvoltage protection according to claim 4 is characterized in that: resistor valve sheet (7) adopts zinc oxide valve plate.
7, overvoltage protection according to claim 1 is characterized in that: drainage ring (4) is sleeved on insulator (3) middle part, but does not contact with insulator (3).
8, overvoltage protection according to claim 1 is characterized in that: the gap between drainage ring (4) and the suspended insulated guide wire (1) is 35～85mm.
9, overvoltage protection according to claim 8 is characterized in that: the gap between drainage ring (4) and the suspended insulated guide wire (1) is 80mm.
10, overvoltage protection according to claim 1 is characterized in that: drainage ring (4) adopts stainless steel drainage ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420037225 CN2735626Y (en) | 2004-06-29 | 2004-06-29 | An over-voltage protector for aerial insulated line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420037225 CN2735626Y (en) | 2004-06-29 | 2004-06-29 | An over-voltage protector for aerial insulated line |
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| Publication Number | Publication Date |
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| CN2735626Y true CN2735626Y (en) | 2005-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420037225 Expired - Lifetime CN2735626Y (en) | 2004-06-29 | 2004-06-29 | An over-voltage protector for aerial insulated line |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101989477A (en) * | 2010-09-28 | 2011-03-23 | 山东迅实电气有限公司 | Ring electrode lightning arrester for contact system of urban rail transit |
-
2004
- 2004-06-29 CN CN 200420037225 patent/CN2735626Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101989477A (en) * | 2010-09-28 | 2011-03-23 | 山东迅实电气有限公司 | Ring electrode lightning arrester for contact system of urban rail transit |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HANGZHOU DAYOU TECHNOLOGY DEVELOPMENT CO., LTD.; Free format text: FORMER OWNER: HANGZHOU DAYOU TECHNOLOGY DEVELOPMENT CO., LTD. Effective date: 20060303 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20060303 Address after: 310012 Zhejiang province Hangzhou Xihu District GUCUI Road No. 78 Co-patentee after: Hangzhou Electric Power Bureau Patentee after: Hangzhou Dayou Technology Development Co., Ltd. Address before: 310012 Zhejiang province Hangzhou Xihu District GUCUI Road No. 78 Patentee before: Hangzhou Dayou Technology Development Co., Ltd. |
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| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140629 Granted publication date: 20051019 |