It is possible to order a hose assembly with a fitting terminal end that has a performance rating lower than the hose rating. Powerline hardware p608z, pins, fittings, overhead products. Ssen 50326 conductors for overhead lines characteristics of greases. The standard pressure ratings for each thread sizes are based on asme b31. Iec and ansi standard sizes, glass and porcelain cap and pin, as well as composite insulators. Mechanical parameters of overhead power lines, construction of lines, and. There is a trend toward larger conductors, higher voltages, longer spans and greater ground clearances. 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. After cables are tensioned and sagged to design drawings. 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. Offset when an assembly of fittings on a pipeline makes one section of pipe out of line and parallel to a second. These requirements demand improved mechanical and electrical performance. While any form of galvanised steelwork can be manufactured to requirements we offer the standard earthing brackets, expulsion fuse switch brackets and transformer platforms.
Kiessling, f, open pdf file from servlet nefzger p, nolasco j. Buyer must notify the company promptly of any claim under this warranty. 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. Ss 424 12 41 overhead line material midspan joints. Line construction hardware for electric utility and communications outside plant grid construction. Conductor data sheet aluminum conductors steel reinforced acsr approx. Structure earthing schedule including measured values. Kplc16c 1tsp060361specification for overhead line fittings part 1 fittings for 10300mm2 conductors. Overhead line fittings and transmission line fittings. C101 cuetp electrolytic tough pitch copper c101 cuetp is a commercially pure high conductivity grade of copper. Ssen 60305 insulators for overhead lines with a nominal voltage above 1 kv ceramic or glass insulator units for a.
Synthetic composite insulator endfitting, silicone rubber housing and. The details display complete hanger assemblies, including upper attachments, clamps, hangers, brackets, and floor stands. 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. Insulation piercing connectors for overhead lines px. In this installation we have a terminal pole, which. High voltage forged steel pin, standard long shank, shanks diameter. This timevarying voltage causes the changes in charges stored on conductors.
Attachment c covers work on steel tower overhead lines at all voltages. Specification for construction of hv overhead lines up to 33kv on. Overhead line fittings uk ltd power lines installation. Helical fittings for overhead power lines ergon energy. For an electrocution to occur, a path to ground must be created for the current. 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. Ssen 61284 overhead lines requirements and test for fittings.
The wcbflow products sline union is leak proof and free of crevices and also consist of two matching ferrules, a gasket, and a clamp. C transmission line standards steel towers overhead ground wire assembly 75. Helical full tension splices and termination fittings. To specify the requirements for overhead line fittings for use on endeavour energys electrical networks. Power line hazards awareness the national work zone. Pipe size thread type fitting type pipe size thread type length material pipe schedule pressure rating unilok nace pipe fittings.
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. The following part number, phrn08n04nssis designated for reducing hex nipple, 12 mnpt x 14 mnpt, 316ss. 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. Pipe fittings for high pressure application are available.
Overhead line hardware overhead line fittings otds. 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. Overhead line fittings and transmission line fittings home. Starting with the first overhead power lines in 1882, hand ties of many. Alan baxter network rail guide to overhead electrification 2787albguneoh000001 february 2015 rev 10 1 of 52 1. Limited free company information from companies house including registered office address, filing history, accounts, annual return, officers, charges, business activity. Production ensto utility networks offers accessories and solutions for. Nuts and bolts are not included with the fittings and must be ordered separately, unless noted. In ac power systems, a transmission line carries a timevarying voltage different in each phase. These mechanical connectors consist of service, parallel, and midspan types. Iec61284ed1997 overhead lines requirements and tests for fittings applies to fittings for overhead lines of nominal voltage above 45 kv. Ssen 50341 overhead electrical lines exceeding ac 45 kv. Generally the alloys and hardware used depend on whether the connector is for a.
Overhead distribution involves the securing of conductors to pin, post and spool insulators. Insulator and conductor fittings for overhead power lines performance, material, general requirements and dimensions. Ssen 100451 metallic materials charpy impact test part 1. 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. 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. About us hebei yipeng line equipment manufacture co. Helical fittings for overhead power lines endeavour energy. Pssi 16 opsaf10016 high voltage overhead lines work on. Erc3010303 product line e pneuedge barb size refer to connector options below for code suffix 250 14 hex 303stainless steel s. Pipe fittings 4 how to order unilok pipe fittings are ordered by part number as shown as below. Copper is used for a variety of applications from electrical parts to electronics to plumbing fittings for the construction industry.
Overhead line installation training statnett overhead line installation training 2day seminar, max. Compression anchor clamps are available either as bolted type suitable for detachable jumper palms or the integral types having angled or straight jumper facility. Ribe electrical fittings optofit opgw oppc accessories. The magnitude of the overvoltage is approximately the same in all phases and may rise to several hundred kilovolts between the phase and earth. Clamps can be used as suspension clamps by simply rotating blocks. 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. Wide product offering blackburn has a complete line of splices, taps and terminals for all overhead distribution applications. Tuofa group is build in 1992, which is the professional creating company in technoloy communication,eletrical power items and telecom. Applies to fittings used for overhead lines of nominal voltage above 45 kv. Overvoltage travels along the line to the nearest pole where it discharges by igniting an arc between the cros. Overhead power lines carry voltages ranging from 120 to 750,000 volts. When ordering hose assemblies, please keep the terminal end.
C transmission line standards steel and concrete pole structures overhead ground wire assembly 76. 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. Preassembled fittings some fittings are available with 4dimensionstrut system compatible hex head cap screws and these fittings and finishes will be channel nuts preassembled. Plp regularly upgrades and replaces test equipment to retain leadership in this area of expertise. Nes fittings are designed to withstand the mechanical and electrical loads that can occur at any levels of voltage in electrical lines. Wood lane works, nortonjuxtatwycross atherstone warwickshire cv9 3qb tel.
The hangercad contains a collection of details showing common b line series pipe support applications. 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. Overhead conductor installation guide general cable. In relevant standards, fittings are frequently designated as accessories which may consist of elements or assemblies. We have sales offices in scandinavia, central europe, baltic countries and russia. Preformed line products australia prides itself on its inhouse, nata accredited test laboratory, for the mechanical testing of overhead power line fittings. 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. Otds has been manufacturing suspension and jointing equipment since 1978. Reduction of fracture toughness due to hydrogen is known but not a practical limitation for the piping conditions and thicknesses typically encountered in refining. Refer figure 1 figure 1 ground line protection r manufacturing detail steel pole 12. This may include upgrading the line from 275,000 volts to 400,000 volts, or. Download citation overhead line fittings according to 10.
The seminar provides the relevant detailed theoretical and practical knowledge necessary for ensuring. Scope this technical specification has been prepared by moe. Overhead line construction refurbishment national grid. Work on conductors, insulators and fittings of live hv circuits is outside. Refining experience is in line with the known factors of hydrogen accelerating fatigue crack growth, and cracking of very hard materials. Ground line protection r 500mm above and 500mm below ground line. Therefore, the performance ratings of these hose fittings meet the sae requirements.
Each grade stocked by columbia metals offers its own specific advantages. D transmission line standards wood pole structures overhead ground wire assembly 77. 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. Insulator and conductor fittings for overhead power lines. 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. With a history of experience and exemplary service, hubbell power systems, inc. 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. 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. Otds supply all types of tension and suspension clamps. The overhead line fittings of otds are used for supporting transformers.
Using 18 905 n 4250 lb, b ased on test data, for metal fittings. Overhead line fittings are required for use on overhead systems ranging from lv to 2 kv. Top quality suspension and jointing equipment manufactured by otds since 1978. Changing charges produce a changing current, which will increase the current through the transmission line and affect the power factor and voltage drop of the line. 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. Sline fittings wcbflow products sline versatile fittings were originally designed for both cop cleanout ofplace and cip cleaninplace applications. Economical fittings properties and typical values of lv abc aerial bundle cable overhead line systems realized with ensto fittings 7. All these materials have an expected lifespan, which varies depending on how the ohl is used and where it is located. A dreaded phenomenon in such systems is the occurrence of highfrequency, shortwave vibrations in the. Cross fittings may deteriorate when temperatures change, because cross fitting is made at the centre of the four connection points. Ssen iso 9001 quality management systems requirements. This downloadable program contains an electronic catalog in pdf format adobe acrobat reader required linked with 93.
High quality power line hardware, overhead line fittings. A wide range of hardware and fittings is offered by otds. It can be used in temperatures from 30 to 120 deg celcius. Transmission line design manual bureau of reclamation. May be applied to fittings for overhead lines of lower nominal voltage and to similar fittings for substations. A wide variety of overhead line fittings options are available to you, such as hexagon. Powerline hardware p608z high voltage forged steel pin. It located in the famous capital of electric in chinashahe, nearby 107 national road, handan airport and the railway station. Pneuedge fittings ensure permanent polyurethane tubing installation without the need for clamps.
Overhead line fittings uk ltd power lines installation and. Overvoltage is induced on the line when lightning strikes an overhead line or its vicinity. Equipment for overhead power lines stringing tesmec. The most common methods for transfer of electric power are. Pdf a detailed investigation of overhead line insulators. For the availability of 6000psig and 0psig, contact your local distributors. Esfi overhead power line safety construction final created date.
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