C transmission line standards steel and concrete pole structures overhead ground wire assembly 76. High voltage forged steel pin, standard long shank, shanks diameter. Overhead distribution 1 f f 21 1609 1 1 2422483 00 100 c c 22mm hole pole cap pole cap bracket xarm 1 1 f f 500mm f f g. Work on, or within the safety distance of, phase conductors, insulators and associated fittings is outside the scope of this safety instruction and is covered in pssi 4. Insulator and conductor fittings for overhead power lines performance and general requirements for helical fittings as 12141983 hotdip galvanized coatings on threaded fasteners iso metric coarse thread series as 1222. Iec61284ed1997 overhead lines requirements and tests for fittings applies to fittings for overhead lines of nominal voltage above 45 kv. Wide product offering blackburn has a complete line of splices, taps and terminals for all overhead distribution applications. Kplc16c 1tsp060361specification for overhead line fittings part 1 fittings for 10300mm2 conductors. Economical fittings properties and typical values of lv abc aerial bundle cable overhead line systems realized with ensto fittings 7. Transmission line design manual bureau of reclamation. The intent of this guide, along with ieee standard 524, guide to the installation of overhead transmission line conductors, is to provide guidance for an optimized installation of overhead conductors. Refurbishment of an overhead line an ohl is constructed using a variety of materials, from concrete and steel for the foundations, steelwork for the pylon and aluminium and steel for the conductors.
Each grade stocked by columbia metals offers its own specific advantages. Technical specification for helical fittings for overhead powerlines page 6 of 14 specification ets010903 ver 3 ergon energy corporation limited abn 50 087 646 062 nominal holding tension withstand slip of the fittings shall be, 15% of the mcbl of the conductor or 3. D transmission line standards wood pole structures overhead ground wire assembly 77. Scope this technical specification has been prepared by moe. Attachment c covers work on steel tower overhead lines at all voltages. Copper is used for a variety of applications from electrical parts to electronics to plumbing fittings for the construction industry. Helical fittings for overhead power lines endeavour energy. Clamps can be used as suspension clamps by simply rotating blocks.
Overhead line installation training statnett overhead line installation training 2day seminar, max. Limited free company information from companies house including registered office address, filing history, accounts, annual return, officers, charges, business activity. May be applied to fittings for overhead lines of lower nominal voltage and to similar fittings for substations. Starting with the first overhead power lines in 1882, hand ties of many. Refer figure 1 figure 1 ground line protection r manufacturing detail steel pole 12. Overhead power lines carry voltages ranging from 120 to 750,000 volts. Production ensto utility networks offers accessories and solutions for. While any form of galvanised steelwork can be manufactured to requirements we offer the standard earthing brackets, expulsion fuse switch brackets and transformer platforms. Therefore, the performance ratings of these hose fittings meet the sae requirements. A wide range of hardware and fittings is offered by otds. Ssen 50326 conductors for overhead lines characteristics of greases. Pssi 16 opsaf10016 high voltage overhead lines work on. A dreaded phenomenon in such systems is the occurrence of highfrequency, shortwave vibrations in the.
Overhead distribution involves the securing of conductors to pin, post and spool insulators. About us hebei yipeng line equipment manufacture co. Nes fittings are designed to withstand the mechanical and electrical loads that can occur at any levels of voltage in electrical lines. Pipe fittings for high pressure application are available. It is possible to order a hose assembly with a fitting terminal end that has a performance rating lower than the hose rating. Ssen iso 9001 quality management systems requirements. Mechanical parameters of overhead power lines, construction of lines, and.
The most common methods for transfer of electric power are. Preformed line products australia prides itself on its inhouse, nata accredited test laboratory, for the mechanical testing of overhead power line fittings. Power line hazards awareness the national work zone. Gzt acsr conductor matthew for which overhead line fittings uk limited was at the forefront of the design of the relevant fittings in collaboration with national grid. Otds supply all types of tension and suspension clamps. All structures shall have the number of foundation blocks as specified in table 7 in appendices 1 to 5 fitted at a. Pipe size thread type fitting type pipe size thread type length material pipe schedule pressure rating unilok nace pipe fittings. Otds has been manufacturing suspension and jointing equipment since 1978.
Overhead line hardware overhead line fittings otds. Ground line protection r 500mm above and 500mm below ground line. Alan baxter network rail guide to overhead electrification 2787albguneoh000001 february 2015 rev 10 1 of 52 1. It is used in a wide range of applications where permanent lowresistance joints are vital these include overhead line conductor connections, cable jointing, transformer and switchgear connections, lightning conductors and many more. Cross fittings may deteriorate when temperatures change, because cross fitting is made at the centre of the four connection points. This may include upgrading the line from 275,000 volts to 400,000 volts, or. On completion of construction and prior to final commissioning of the overhead line installation the asp is to provide the following as installed detail to ee. Overvoltage travels along the line to the nearest pole where it discharges by igniting an arc between the cros. Powerline hardware p608z high voltage forged steel pin. Insulator and conductor fittings for overhead power lines. Pneuedge fittings ensure permanent polyurethane tubing installation without the need for clamps.
We offer a wide range of hardware and fittings for all types of conductor and voltages from lv networks up to 500kv transmission lines and substations. With a history of experience and exemplary service, hubbell power systems, inc. Installation practices once the route and length of a transmission or distribu tion line has been decided upon and the correct conductor size and type selected to carry the system load safely and economically, there are still several mechanical considera tions which will have an effect on installation practices. Insulator and conductor fittings for overhead power lines performance, material, general requirements and dimensions. Sae and jic flare fittings in hydraulic applications, while sae adapters are commonly brass flare. Maximum dc code overall rated resistance name steel total aluminium steel diameter aluminium steel total strength at 20 oc awg or awg or mcm mcm turkey 6. Wood lane works, nortonjuxtatwycross atherstone warwickshire cv9 3qb tel.
The wcbflow products sline union is leak proof and free of crevices and also consist of two matching ferrules, a gasket, and a clamp. The details display complete hanger assemblies, including upper attachments, clamps, hangers, brackets, and floor stands. Refining experience is in line with the known factors of hydrogen accelerating fatigue crack growth, and cracking of very hard materials. Overhead line fittings are required for use on overhead systems ranging from lv to 2 kv. Preassembled fittings some fittings are available with 4dimensionstrut system compatible hex head cap screws and these fittings and finishes will be channel nuts preassembled. Overhead line fittings uk ltd power lines installation. This specification covers the design, engineering, manufacture, testing, supply and delivery of. However, we recommend the use of clamps in applications over 80 psi which also involve heat or vibration. Depending on the line spec ifications our engineers will design the position complete with all the required accessories terminal position beginning or end of the line.
These requirements demand improved mechanical and electrical performance. Powerline hardware p608z, pins, fittings, overhead products. These mechanical connectors consist of service, parallel, and midspan types. The following part number, phrn08n04nssis designated for reducing hex nipple, 12 mnpt x 14 mnpt, 316ss. For an electrocution to occur, a path to ground must be created for the current. This specification covers the provision of tubular steel supports, crossarms, fittings and accessories suitable for 11kv overhead lines with maximum conductor size 12020 acsr and lv lines with maximum conductor size 120mm2 aac. Buyer must notify the company promptly of any claim under this warranty.
Work on conductors, insulators and fittings of live hv circuits is outside. A wide variety of overhead line fittings options are available to you, such as hexagon. We supply all kind of power line hardware, inclding strain clamp, stay rod, insulator pin, cross arm, we have passed ce certificate, iso 9001 system, with part of products up to some european and american industrially developed countries level. Tuofa group is build in 1992, which is the professional creating company in technoloy communication,eletrical power items and telecom. In this installation we have a terminal pole, which. The overhead line fittings of otds are used for supporting transformers.
Plp regularly upgrades and replaces test equipment to retain leadership in this area of expertise. For the availability of 6000psig and 0psig, contact your local distributors. Synthetic composite insulator endfitting, silicone rubber housing and. Nuts and bolts are not included with the fittings and must be ordered separately, unless noted. Iec and ansi standard sizes, glass and porcelain cap and pin, as well as composite insulators. This downloadable program contains an electronic catalog in pdf format adobe acrobat reader required linked with 93. Sline fittings wcbflow products sline versatile fittings were originally designed for both cop cleanout ofplace and cip cleaninplace applications. Overhead line construction refurbishment national grid.
In relevant standards, fittings are frequently designated as accessories which may consist of elements or assemblies. Esfi overhead power line safety construction final created date. Kiessling, f, open pdf file from servlet nefzger p, nolasco j. Limit state design principles for various line components security classes and design working life more detailed coverage on electrical design and earthing using eg0 risk based earthing approach covers steel lattice, steel poles, concrete poles, wood poles and crossarms handbook hb331 published april 2012 amendments to asnzs7000 due to be. Overhead line fittings and transmission line fittings home. Reduction of fracture toughness due to hydrogen is known but not a practical limitation for the piping conditions and thicknesses typically encountered in refining. Specification for construction of hv overhead lines up to 33kv on. Ssen 60305 insulators for overhead lines with a nominal voltage above 1 kv ceramic or glass insulator units for a. Conductor data sheet aluminum conductors steel reinforced acsr approx. To specify the requirements for overhead line fittings for use on endeavour energys electrical networks. Applies to fittings used for overhead lines of nominal voltage above 45 kv. It located in the famous capital of electric in chinashahe, nearby 107 national road, handan airport and the railway station.
The magnitude of the overvoltage is approximately the same in all phases and may rise to several hundred kilovolts between the phase and earth. Overhead line fittings uk ltd power lines installation and. Pdf a detailed investigation of overhead line insulators. Generally the alloys and hardware used depend on whether the connector is for a. Overhead conductor installation guide general cable. Download citation overhead line fittings according to 10. High quality power line hardware, overhead line fittings.
All these materials have an expected lifespan, which varies depending on how the ohl is used and where it is located. After cables are tensioned and sagged to design drawings. Erc3010303 product line e pneuedge barb size refer to connector options below for code suffix 250 14 hex 303stainless steel s. There is a trend toward larger conductors, higher voltages, longer spans and greater ground clearances. Ss 424 12 41 overhead line material midspan joints. Equipment for overhead power lines stringing tesmec. Compression anchor clamps are available either as bolted type suitable for detachable jumper palms or the integral types having angled or straight jumper facility.
Pipe fittings 4 how to order unilok pipe fittings are ordered by part number as shown as below. It can be used in temperatures from 30 to 120 deg celcius. In ac power systems, a transmission line carries a timevarying voltage different in each phase. Structure earthing schedule including measured values. The standard pressure ratings for each thread sizes are based on asme b31. Insulation piercing connectors for overhead lines px. Overvoltage is induced on the line when lightning strikes an overhead line or its vicinity. The company founded in 1995, we are professional supplier and manufacturer in electric power fittings, especially on aerial overhead. This timevarying voltage causes the changes in charges stored on conductors. Overhead line fittings and transmission line fittings. Helical fittings for overhead power lines ergon energy. Ribe electrical fittings optofit opgw oppc accessories.
C101 cuetp electrolytic tough pitch copper c101 cuetp is a commercially pure high conductivity grade of copper. Windinduced vibrations in overhead transmission lines can damage conductors bundled conductor systems are used in overhead transmission lines for highvoltage and extrahighvoltage grids for electrical reasons. Ssen 50341 overhead electrical lines exceeding ac 45 kv. The seminar provides the relevant detailed theoretical and practical knowledge necessary for ensuring. Since its establishment in 1961, overhead line fittings uk limited has worked with national grid formerly the cegb, the dnos and their contractors to provide a complete package of materials for the installation and maintenance of overhead transmission and distribution power lines. Top quality suspension and jointing equipment manufactured by otds since 1978. Ssen 61284 overhead lines requirements and test for fittings.
C transmission line standards steel towers overhead ground wire assembly 75. Offset when an assembly of fittings on a pipeline makes one section of pipe out of line and parallel to a second. When ordering hose assemblies, please keep the terminal end. Using 18 905 n 4250 lb, b ased on test data, for metal fittings.
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