CN2428903Y - Overhead insulation-line over-voltage protection apparatus - Google Patents
Overhead insulation-line over-voltage protection apparatus Download PDFInfo
- Publication number
- CN2428903Y CN2428903Y CN 00230081 CN00230081U CN2428903Y CN 2428903 Y CN2428903 Y CN 2428903Y CN 00230081 CN00230081 CN 00230081 CN 00230081 U CN00230081 U CN 00230081U CN 2428903 Y CN2428903 Y CN 2428903Y
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- insulator
- lightning
- insulated
- guiding device
- line
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses an overhead insulation-line over-voltage protector, relating to the technology of lightning protection. The over-voltage protector is developped for elimiting the process of scrapping the insulation layer of a cable in an overhead insulation-line when a lightning arrester is installed. The protector is mainly composed of an insulator, a non-linear current limiter and a current guiding device. The top end of the non-linear current limiter is horizontally fixed the current guiding device, and the current guiding device is arranged on the circumference of the lower end of the insulator. The current guiding device can be formed in the shape of a stainless steel circle, a semicircle and a straight line or a curve. The utility model having the advantages of simple structure, high performance and price ratio and high safety can be used for the lightning protection of the overhead insulation-line.
Description
The utility model relates to lightning-protecting engineering, relates in particular to the lightning-protecting engineering of insulated overhead line.
Lightning flashes and thunder rumbles is a kind of common natural phenomena.Lightning energy causes casualties; Can make building, structures breaking-up and on fire, energy ignition and blasting combustible and explosive articles; Especially electric equipment, circuits such as electric power, communication, computer are caused huge destruction.For thunder and lightning, human also not finding at present controlled its effective way of control.But, install that some are lightning-arrest, thunder eliminating device and facility, can significantly reduce the thunderbolt loss.
Along with the mankind are more and more higher to the power supply reliability requirement, and unexpected power outage will bring enormous economic loss to society.In order to solve of the influence of external objects such as branch, parabolic to distribution wire, improve power supply reliability, domesticly begin the city overhead distribution has been carried out the insulating transformation from the eighties.But along with the employing of aerial insulated cable, caused a new problem, promptly lightning overvoltage is done the time spent, and power frequency arc concentrates on the breakdown point of insulating barrier, causes insulated cable burning and fusing.Though metal oxide arrester can play the effect that prevents lightning overvoltage, it has following deficiency:
Must divest the insulating barrier of insulated cable when 1. installing, cause rainwater to divest an infiltration, the plain conductor of corrosion insulated cable along insulating barrier;
2. lightning arrester not only bears the power-frequency voltage effect for a long time, also will bear the effect of lightning overvoltage and power frequency continued flow simultaneously off and on, and aging easily, its fault is a lot, and cost is very high;
3. if because of big lightning current by lightning arrester, cause lightning arrester to hold can't stand and damage, cause short circuit ground connection, cause the insulated cable broken string.
The purpose of this utility model just is to overcome the problem and shortage that above-mentioned prior art exists, and develops a kind of insulated overhead line overvoltage protection.
The purpose of this utility model is achieved in that by non-linear flow restricter, series gap and cooperates with the suitable of insulator; a stainless steel flow diverter promptly is set around the top of non-linear flow restricter and insulator; behind the thunderbolt insulated overhead line; series gap is at first breakdown; guide lightning current into non-linear flow restricter; and at 1/4 power frequency period internal cutting off power frequency continued flow; avoid insulator arc-over or puncture; the protection insulated overhead line avoids taking place broken string accident and the great personal injury accident that may cause because of breaking and the huge economic compensation of initiation thus.
Describe in detail below in conjunction with drawings and Examples:
Fig. 1 is this structure drawing of device (main looking);
Fig. 2 is a circular flow diverter structure chart (overlook, dwindle);
Fig. 3 is a straight line flow diverter structure chart (overlook, dwindle);
Fig. 4 is a curve flow diverter structure chart (overlook, dwindle);
Fig. 5 is general overhead transmission line overvoltage protection scheme of installation.
Wherein: 1-insulated circuit, 2-insulator, the non-linear flow restricter of 3-, 4-flow diverter, 5-cross-arm, 6-series gap, 7-electric pole, 8-lead-in wire, 9-lightning arrester.
As shown in Figure 1, this device is made up of insulator 2, non-linear flow restricter 3, flow diverter 4, the cross-arm 5 of fixed insulation circuit 1.Insulator 2 is parallel each other with non-linear flow restricter 3 and be separately fixed on the cross-arm 5.At stainless steel flow diverter 4 of the top of non-linear flow restricter 3 horizontal fixed, flow diverter 4 places the periphery (not contacting) of insulator 2 lower ends.According to different requirements, flow diverter 4 is circle, semicircle, linear and shaped form.Left end at circular flow diverter 4 has an opening, is convenient to install.
Operation principle of the present utility model is:
When insulated overhead line 1 has lightning current, the high pressure of lightning current at first punctures the insulating barrier of insulated circuit and the series gap 6 between the stainless steel flow diverter 4, guide lightning current into non-linear flow restricter 3, because non-linear flow restricter 3 is non-linear, its thunder and lightning residual voltage is limited on the power-frequency overvoltage, and at 1/4 power frequency period internal cutting off power frequency continued flow.That is to say; because the puncture voltage of the series gap 6 of design is lower than the flashover voltage of protected insulator 2; normal working voltage is done the time spent; this gap 6 can be not breakdown; when lightning current transmits along insulated circuit 1; the overvoltage that appearance jeopardizes the insulated overhead line 1 that needs protection; this series gap 6 is at first breakdown; discharge over the ground by non-linear flow restricter 3; make a large amount of electric charges all leak in the ground; thereby limited the voltage value of insulated overhead line 1, played the effect of protection insulated overhead line 1.
The utlity model has following advantage:
1. by the synergy of series gap 6 and non-linear flow restricter 3, cut off power frequency continued flow effectively, avoid the broken string accident of insulated circuit 1 after thunderbolt;
Needn't divest the insulating barrier of insulated circuit 1 when 2. installing, thereby eliminate the shortcoming that lightning arrester 9 is installed;
3. because of series gap 6 is arranged, 3 of non-linear flow restricters just work when lightning current, do not have power frequency continued flow at ordinary times and pass through, and have improved the life-span of this device, help the safe operation of electric power system;
Even 4. big lightning current is arranged by non-linear flow restricter 3, cause non-linear flow restricter 3 to hold can't stand and damage, because of the buffer action of series gap 6 can not cause short circuit ground connection, guarantee the safety of electric power system.
Because the utility model is simple in structure, ratio of performance to price height, safe and reliable, therefore in insulated overhead line lightning-arrest, be widely used.
Claims (2)
1, a kind of insulated overhead line over-pressure safety device includes the insulator (2) and the non-linear flow restricter (3) of fixed insulation circuit (1), it is characterized in that:
1. insulator (2) is parallel each other with non-linear flow restricter (3) and be separately fixed on the cross-arm (5);
2. fix a stainless steel flow diverter (4) on the top of non-linear flow restricter (3), flow diverter (4) places end periphery (not contacting) under the insulator (2), forms the gap (6) of connecting between insulated circuit (1) and flow diverter (4).
2, by the described a kind of insulated overhead line over-pressure safety device of claim 1, it is characterized in that flow diverter (4) left part is divided into circle, semicircle, straight line or curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00230081 CN2428903Y (en) | 2000-06-05 | 2000-06-05 | Overhead insulation-line over-voltage protection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00230081 CN2428903Y (en) | 2000-06-05 | 2000-06-05 | Overhead insulation-line over-voltage protection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2428903Y true CN2428903Y (en) | 2001-05-02 |
Family
ID=33593235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00230081 Expired - Fee Related CN2428903Y (en) | 2000-06-05 | 2000-06-05 | Overhead insulation-line over-voltage protection apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2428903Y (en) |
Cited By (2)
| 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 |
| CN110162914A (en) * | 2019-05-30 | 2019-08-23 | 广州供电局有限公司 | Current limiter insulation level calculation system, method, device and readable storage medium |
-
2000
- 2000-06-05 CN CN 00230081 patent/CN2428903Y/en not_active Expired - Fee Related
Cited By (2)
| 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 |
| CN110162914A (en) * | 2019-05-30 | 2019-08-23 | 广州供电局有限公司 | Current limiter insulation level calculation system, method, device and readable storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |