CY1295A - Surge diverter/arrester - Google Patents
Surge diverter/arrester Download PDFInfo
- Publication number
- CY1295A CY1295A CY1295A CY129580A CY1295A CY 1295 A CY1295 A CY 1295A CY 1295 A CY1295 A CY 1295A CY 129580 A CY129580 A CY 129580A CY 1295 A CY1295 A CY 1295A
- Authority
- CY
- Cyprus
- Prior art keywords
- arrester
- heat
- electrical surge
- surge diverter
- housing
- Prior art date
Links
- 239000000463 material Substances 0.000 claims description 15
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 4
- 210000000481 breast Anatomy 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 239000011787 zinc oxide Substances 0.000 claims description 2
- 230000008602 contraction Effects 0.000 claims 2
- 230000002401 inhibitory effect Effects 0.000 claims 1
- 229910052573 porcelain Inorganic materials 0.000 description 9
- 239000012212 insulator Substances 0.000 description 4
- 239000002360 explosive Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/12—Overvoltage protection resistors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/66—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by liberation of internal stresses, e.g. shrinking of one of the parts to be joined
- B29C65/68—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by liberation of internal stresses, e.g. shrinking of one of the parts to be joined using auxiliary shrinkable elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T4/00—Overvoltage arresters using spark gaps
- H01T4/04—Housings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3406—Components, e.g. resistors
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Thermistors And Varistors (AREA)
Description
1
GB 2 073 965 A 1
SPECIFICATION
Improvements in electrical surge diverters
5 This invention concerns improvements in electrical surge diverters (also known as surge arresters) as used particularly, though not exclusively, in electrical power distribution and transmission systems for the safe handling of atmospherically induced surges 10 (lightning strikes for instance) and overvoltages caused by switching operations.
As is well known in the surge diverter art and as is described in our British Patent Application No. 7918273 (Serial No. ), surge arresters com-
15 monly comprise a non-linear resistor arrangement contained within the bore of a glazed porcelain insulator housing. The non-linear resistor arrangement commonly has comprised a series arrangement of spark gaps and silicon carbide varistor 20 elements and is designed such that, in the event of a voltage surge on a line connected to the arrester, the spark gaps flash over and put an earth fault on the line for the duration of the surge, the power follow current which can flow through the arrester being 25 limited bythe series non-linear resistors to a level' which can be cleared by the spark gaps.
The porcelain housing places various constraints upon the manufacture of surge arresters. It is conventional to vacuum dry the assembly of the 30 non-linear resistor arrangement with the porcelain housing and to fill the arrester with an inert gas prior to final sealing. It is also conventional, particularly in the case of larger sized, station class diverters but also in the case of smaller distribution type diverters, 35 to provide a pressure-relief diaphragm atone or both ends of the porcelain insulator housing adapted to rupture in the event of an overpressure occurring in the gas filling of the diverter as a result of the expansion of this gas when the diverter operates to 40 divert a current surge to earth. The purpose of these provisions has been to protect the porcelain housing against explosive shattering which otherwise can occurwith corresponding risk to lifeand property.
The cost of the porcelain insulator housing and of 45 the treatments and arrangements necessary to minimise the danger it presents by virtueof its risk of explosive shattering, has conventionally contributed very significantly to the cost of a surge diverter.
The present invention proposes to obviate the use 50 of porcelain insulators as housings for surge arresters. According to the invention, a surge arrester comprises a generally tubular housing formed of a heat-shrink material. Such a surge arrester can accommodate within its housing any type of electric-55 al surge arrester arrangement and, by virtue of the nature of heat-shrink materials which are in themselves well known, is not subject to any explosive shattering problems and so has no need for special rupturable end seals and, in its manufacture, has no 60 need for the evacuation, drying and inert gas filling stages of conventional surge arresters housed in porcelain. Other advantages arise by virtue of the considerable weight saving which arises by use of heat-shrink material in place of porcelain, which 65 reflects in lower mounting bracket costs, lower
2073965A l_>
installation costs, and lower transportation costs.
The heat-shrink material is necessarily a high voltage electrical insulator, capable of withstanding the electrical potential of a lightning strike for example without dielectric breakdown. Such materials are known per se and are available for example from Raychem Limited. One such heat-shrink material is a modified ethylene propylene polymer preferably incorporating an anti-creepage tracking agent.
An exemplary embodiment of the invention is illustrated in the accompanying drawing and will be described hereinafter in order that the invention might be clearly understood.
In the drawing, details of the non-linear resistor assembly 1 are not shown. This assembly can be of any appropriate form such as the conventional series arrangement of spark gaps and silicon carbide resistors for example or an alternative arrangement comprising zinc oxide varistors. End caps 2 formed with terminal posts 3 are provided at each end of the non-linear resistor arrangement 1, and the whole is secured together by means of a sleeve 4 of heat-shrink material. The end caps 2 are formed as shown so as to constitute with the heat-shrink sleeve 4 effective end seals for the non-linear resistor arrangement 1 and also so that as the sleeve 4 is shrunk down onto the resistor 1 and end caps 2 combination, the sleeve 4 compacts the end caps 2 onto the resistor arrangement 1 and ensures good electrical connection between the end caps 2 and the resistor 1. Circumferential grooves formed in the end caps 2 ensure that the heat shrink material binds firmly with the end caps 2.
A plurality of sheds 5 are provided. These preferably are formed also of heat-shrink material and can be formed integrally with the sleeve 4 or can be separate therefrom.
One or more electrically insulating reinforcing rods 6 may be passed through bores in the resistor arrangement 1 to augment the rigidity of the finished arrester.
The above-described embodiment of the invention is but one example of a surge arrester constructed in accordance with the invention and, as will be appreciated by those possessed of appropriate skills and knowledge, various modifications and alternatives are possible. For example, a three phase type surge arrester could be constructed in accordance with the invention so as to have three non-linear resistor limbs extending from a common base mounting, each limb constituting an arrester for one particular phase, and with the three limbs housed within a three-part heat-shrink "udder".
Claims (10)
1. An electrical surge diverter/arrester comprising a non-linear resistor arrangement within a tubular housing formed of heat-shrink material.
2. An electrical surge diverter/arrester according to claim 1 wherein said heat-shrink material incorporates an agent for inhibiting electrical creepage tracking.
3. An electrical surge diverter/arrester as claimed in claim 1 or 2 wherein said heat-shrink material
70
75
80
85
90
95
100
105
110
115
120
125
130
GB 2 073 965 A
comprises a modified ethylene propylene polymer.
4. An electrical surge diverter/arrester as claimed in any of the preceding claims wherein the nonlinear resistor arrangement comprises zinc oxide
5 varistors.
5. An electrical surge diverter/arrester as claimed in any of the preceding claims incorporating one or -4
more electrically insulating reinforcing elements . '
extending through the non-linear resistor arrange-10 ment longitudinally of the tubular housing.
6. An electrical surge diverter/arrester as claimed in any of the preceding claims incorporating end caps formed for cooperation with said heat-shrink material housing such that when said housing is
15 heat-shrunkthe lateral contraction thereof engages the end caps with the housing and the longitudinal contraction thereof compacts the end caps on to the non-linear resistor arrangement.
7. An electrical surge diverter/arrester as claimed 20 in any of the preceding claims including a number of sheds externally of said housing, the said sheds being formed of heat-shrink material.
8. An electrical surge diverter/arrester as claimed in claim 7 wherein the sheds are formed integrally
25 with the heat-shrink material housing.
9. An electrical surge diverter/arrester as claimed in any of the preceding claims constructed for *
multi-phase application and comprising a non-linear resistor limb for each phase extending from a 30 common base mounting, each limb constituting a diverter/arrester for one particular phase, and wherein the multiple limbs are housed each within one part of a multiple part heat shrink "udder".
10. An electrical surge diverter/arrester substan-35 tially as herein described with reference to the accompanying drawing.
Printed for Her Majesty's Stationery Office by Croydon Printing Company Limited, Croydon, Surrey, 1981.
Published by The Patent Office, 25 Southampton Buildings, London, WC2A 1AY,
from which copies may be obtained.
BNSDOCID: <GB 2073965A_I_>
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8011609A GB2073965B (en) | 1980-04-08 | 1980-04-08 | Surge diverter/arrester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CY1295A true CY1295A (en) | 1985-10-18 |
Family
ID=10512663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CY1295A CY1295A (en) | 1980-04-08 | 1980-04-08 | Surge diverter/arrester |
Country Status (5)
| Country | Link |
|---|---|
| CY (1) | CY1295A (en) |
| GB (1) | GB2073965B (en) |
| HK (1) | HK49085A (en) |
| MY (1) | MY8600110A (en) |
| SG (1) | SG23885G (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH666574A5 (en) * | 1984-06-01 | 1988-07-29 | Bbc Brown Boveri & Cie | SURGE ARRESTERS. |
| GB8527548D0 (en) * | 1985-11-08 | 1985-12-11 | Raychem Gmbh | Electrical equipment |
| CA1315336C (en) * | 1986-01-29 | 1993-03-30 | Rodney Meredith Doone | Electrical surge arrester/diverter |
| DE3769955D1 (en) * | 1986-12-12 | 1991-06-13 | Sediver | METHOD FOR PRODUCING A LIGHTNING ARMOR AND LIGHTNING ARMOR PRODUCED BY THIS METHOD. |
| SE456623B (en) * | 1987-02-23 | 1988-10-17 | Asea Ab | surge |
| JP2647893B2 (en) * | 1987-03-06 | 1997-08-27 | セラヴェール | How to make an arrester |
| AU603020B2 (en) * | 1988-12-06 | 1990-11-01 | Asea Brown Boveri Ab | Surge arrester |
| US5680289A (en) * | 1996-06-27 | 1997-10-21 | Raychem Corporation | Surge arrester |
| US5757604A (en) * | 1996-06-27 | 1998-05-26 | Raychem Corporation | Surge arrester having grooved and ridged terminals |
| US5712757A (en) * | 1996-06-27 | 1998-01-27 | Raychem Corporation | Surge arrester having ridged terminals |
| DE19927940B4 (en) * | 1999-06-18 | 2011-08-18 | Tridelta Überspannungsableiter GmbH, 07629 | Plastic surge arresters in modular design and method for its production |
| DE102005007146A1 (en) * | 2005-02-11 | 2006-08-24 | Siemens Ag | Method for sheathing a varistor block with an electrically insulating sheath and varistor block for a surge arrester |
-
1980
- 1980-04-08 GB GB8011609A patent/GB2073965B/en not_active Expired
- 1980-04-08 CY CY1295A patent/CY1295A/en unknown
-
1985
- 1985-03-30 SG SG238/85A patent/SG23885G/en unknown
- 1985-06-20 HK HK490/85A patent/HK49085A/en not_active IP Right Cessation
-
1986
- 1986-12-30 MY MY110/86A patent/MY8600110A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| SG23885G (en) | 1985-09-13 |
| GB2073965A (en) | 1981-10-21 |
| MY8600110A (en) | 1986-12-31 |
| GB2073965B (en) | 1984-05-02 |
| HK49085A (en) | 1985-06-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4161012A (en) | High voltage protection apparatus | |
| US4100588A (en) | Electrical overvoltage surge arrester with varistor heat transfer and sinking means | |
| US5708555A (en) | Surge arrester having controlled multiple current paths | |
| CY1295A (en) | Surge diverter/arrester | |
| JPS63215020A (en) | Surge arrestor | |
| US5608596A (en) | Surge arrester with spring clip assembly | |
| EP0388779B1 (en) | Cable termination | |
| US6493201B1 (en) | Spark gap retrofit module for surge arrester | |
| CA1129487A (en) | Overvoltage protection device | |
| US4203143A (en) | Protective device | |
| US4270160A (en) | Lightning resistive device in aerial power transmission system | |
| JPH0145812B2 (en) | ||
| US4924346A (en) | Gas discharge surge suppressor for a telephone line | |
| EP0004348B1 (en) | Lightning arrester device for power transmission line | |
| CA2098365A1 (en) | Surge arrester with spring clip assembly | |
| WO1982000926A1 (en) | Improvements in surge arresters | |
| US4074338A (en) | Multi-element surge arrester | |
| JPS5923050B2 (en) | Lightning resistant bushing | |
| JPS5947866B2 (en) | Lightning arrester | |
| JPH073538Y2 (en) | Lightning arrester | |
| RU41185U1 (en) | LOW-VOLTAGE OVERVOLTAGE LIMITER | |
| SU853728A1 (en) | Overvoltage protection device | |
| JPH0714707A (en) | Arrester for power transmission | |
| KR820001579B1 (en) | Lighting arrester device for power transmission line | |
| EP0107762A1 (en) | Failsafe overvoltage protector |