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Topic: Catenary (railways)

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	Viessman Main Page
		Catenary is a feature of most countries real size railways to one degree or another.
		By ensuring all catenary wires hang from the catenary masts via the live section of the prong.
		In real life each catenary wire has a certain length and as it reaches the end, it needs to be exchanged for a fresh length.
	www.reynaulds.com /viessmann/catenary.html (1118 words)

	Class 104: RAILWAYS / U.S. Patent Classification Definitions
		Apparatus comprising an arrangement of a plurality of railway tracks, means to facilitate the making-up of a train of railway cars, means to facilitate the sorting of railway cars, or the general arrangement of a railway yard designed to receive, distribute, or classify railway cars.
		Railways in which the trackway is provided with an underground slotted conduit for the reception of traction elements, such as electric conductors or traction-cables.
		Traction railways in which field farm tools are adapted to reciprocate transversely of the field by traction and to move longitudinally thereof at the same time or adapted for transverse and longitudinal movement independent of each other.
	www.uspto.gov /web/offices/ac/ido/oeip/taf/def/104.htm (6896 words)

	Railway Goof Up (Site not responding. Last check: 2007-10-17)
		The Indian Railways may have lost crores of rupees in repairs, replacement and traffic disruptions because of a flawed decision by the administration to use a different material for overhead traction wires instead of the regular one, it has been reliably learnt.
		The Railway Board decided in 1990 to use AAA Catenary wires for overhead traction on lines that were being newly electrified.
		The AAA Catenary wires were estimated to have a useful life of 25 years, against which they were used for only 19 years.The replacement of AAA Catenary wires with Copper Cadmium wires is estimated to cost Rupees 4.51 crore.
	www.nagpurcity.net /cityline/260698.html (1162 words)

	Overhead lines - Wikipedia, the free encyclopedia
		These were an experimental railway line of Siemens in Berlin-Lichtenberg in 1898 (length: 1.8 kilometres), the military railway between Marienfelde and Zossen between 1901 and 1904 (length: 23.4 kilometres) and an 800-metre-long section of a coal railway near Cologne, between 1940 and 1949.
		A catenary is a system of overhead wires used to supply electricity to a locomotive, streetcar, or light rail vehicle which is equipped with a pantograph.
		One wire, called the catenary wire or the messenger wire, is hung at a specific tension value in the shape of a mathematical catenary between line structures.
	en.wikipedia.org /wiki/Catenary_(railways) (2858 words)

	Funicular
		A funicular railway is always on a steep slope, the rolling stock often being pulled by a steel cable, driven by a stationary engine, though some mountain railways use a rack-and-pinion drive, using a motor on the train.
		All we have is a sentence that is equivalent to "catenary".
		The funicular for the catenary is not exactly central in the diagram because of the crude method of iterating in the calculation.
	www.brantacan.co.uk /funicular.htm (2693 words)

	Trolley - Biocrawler (Site not responding. Last check: 2007-10-17)
		Outside of the United States of America and Canada, a trolley is usually known as an electric tram.
		The term "trolley" derives from the trolley pole that collects live power from an overhead wire or cable, sometimes simply strung, sometimes as catenary.
		The trolley pole in turn derived its name from the "trolley wheel" that was formerly the chief means of contact between car and wire as the wheel "trolled" behind the moving car.
	www.biocrawler.com /encyclopedia/Trolley (317 words)

	Technologies - Regenerative braking in 50 Hz, 25 kV systems
		However, is is often not an attractive option for railways since most energy suppliers do not reimburse the recovered energy or only at a much lower price than for the intake.
		Catenary voltage (25 kV) is very high which allows for a transmission at low losses over relatively big distances.
		Receptivity of catenary: The supply system may be non-receptive“ because no other train is close enough to use it.
	www.railway-energy.org /static/Regenerative_braking_in_50_Hz__25_kV_systems_104.php (1357 words)

	tren auscultador de catenaria - catenary inspection (and maintenance/diagnostic) vehicle/car (Spanish to English ...
		To evaluate the geometry of the contact wire it is necessary to measure the height of the contact wire above the rails and the horizontal position of the contact wire and to know the relative position between track and overhead wire.
		The Catenary Inspection Vehicle was designed and manufactured in Columbia (South Carolina) for TRA which is the National Railway in Taiwan.
		This machine is the first machine of its kind to be able to measure the location and profile of the overhead catenary wire by non-contact means using lasers and high speed cameras at speeds of up to 100 kph (62 mph).
	www.proz.com /kudoz/1294495 (1642 words)

	OnTracks guide to the Viessmann high realism catenary system
		The frame hanging between the two masts is called a Headspan - in the Viessmann system the Headspan is sold both separately and as part of a unit with two masts.
		However the more unusual items might need to be ordered from Germany which may take 4-8 weeks, so we recommend ordering your entire requirements early, which will allow you to start on your electrification and complete it as outstanding items arrive.
		The pictures on this guide are taken from the 'Catenary Information Book', which can be ordered from us - it is listed in the HO category, however all text is in German.
	www.ontrackscart.co.uk /graphics/guide_viessmann_catenary.htm (1296 words)

	The Hindu Business Line : Railways must shed baggage of the past
		Like the axle load, the prevalent net weight to tare weight ratio for wagons on Indian Railways, varying between 2 and 2.6, is one of the lowest in the world.
		The Railways needs to shed the baggage of the past and expeditiously bring about an effective change in its siding regime: Its cost-structure, staffing, and maintenance obligations.
		The Railways must bring about technological evolution in equipment and practices, and move towards higher axle load, higher payload-to-tare ratio, optimal moving dimensions, material-handling facilities, appropriate terminals, maintenance standards and practices.
	www.thehindubusinessline.com /2006/02/23/stories/2006022301711000.htm (835 words)

	Catenary inspection on rail networks using the DayCor Corona Detection Camera (Site not responding. Last check: 2007-10-17)
		In common use as a preventative maintenance tool to detect electrical faults, Infrared Thermal Imaging cameras can easily identify problems with connectors, where the fault is apparent as a change in temperature.
		However they are unable to determine the condition of insulators etc on Catenary, where the fault produces minimal if any change in temperature.
		In order to undertake a thorough Catenary inspection on the Gorkovskaya rail network in Russia, it was decided to use both thermal and ultra violet methods of measurement.
	www.uvcamera.co.uk /catenary_inspection.htm (204 words)

	Progress of Electric Railways in Japan
		Following the 1906 nationalization, in 1908, responsibility for administration of railways was transferred from the Ministry of Communications to the Railway Agency, which was part of the cabinet, and this administration system continued until 1987 when JNR was privatized and divided.
		However, the small generation capacity of the railway companies in the huge electricity supply business meant that they could not compete with the power companies and their electric lighting business was soon consolidated with that of the larger power utilities, leaving five powerful national companies at that time.
		Private railways took the lead over government railways in introducing urban electric rail services and during this period, electricity for operations was supplied from the railway companies' own generating stations with surplus capacity sold to trackside housing and factories.
	www.jrtr.net /jrtr42/s62_kob.html (4799 words)

	Shore Line Interurban Historical Society: Chicago Electric Railways - Dotted Dictionary (Site not responding. Last check: 2007-10-17)
		Some is specific to the railway or transit industry in general, while others are specific to the Chicagoland electric railway properties covered by Shore Line.
		A steady is an assembly of a wood strain insulator, a steady arm of metal rod, and a contact wire clamp, together with an appropriate fitting to attach it to the supporting structure.
		In 1893 the Calumet Electric Street Railway reached 119th and Halsted streets, extended two blocks south to the IC station in 1896, and substituted the 3/4-mile single-track West Pullman loop in 1904.
	www.shore-line.org /railroads/dictionary (2854 words)

	Swedish railways history
		A railway was built between the mines and harbour in Höganäs.
		The railway network had a length of 2000 km, 1100 km of which were state owned.
		The Swedish railways are at their largest with a total lenght of 16900 km.
	www.canit.se /~griffon/railways/text/swe_history.html (1556 words)

	Bahnbau Gruppe - Catenary systems
		New build and upgrading, renewal, repair and general services for standard catenary systems, plus the reconstruction, modification and extension of electrical power systems of railways are included in the portfolio of catenary installation services.
		The catenary installation wagon is used to wind the contact wire and carrying cable onto drums continuously and simultaneously.
		The catenary installation wagon is an integral part of the catenary renewal complex, but can also be used separately.
	www.db.de /site/bahnbaugruppe/en/heavy__equipment/catenary__systems/catenary__systems.html (488 words)

	Overhead trolley wire insulated support post - Patent 4625839 (Site not responding. Last check: 2007-10-17)
		It is an object of the present invention to provide an improved cantilever structural assembly of the kind described for use in an overhead electric traction system for railways, which cantilever structural assembly is simple in construction and substantially less expensive than cantilever structural assemblies hitherto proposed and used.
		A clevis clamp 27, attached to the horizontal strut 23 close to its outer end, is attached by a pin to the clevis side of a tongue and clevis clamp 28 attached to the upper end of the inclined strut 22.
		A catenary swivel clamp 29 for supporting the catenary is attached to the horizontal strut 23 between the clevis clamp 27 and the outer end of the horizontal strut.
	www.freepatentsonline.com /4625839.html (1508 words)

	Safety systems for the railway industry : platforms, cranes, catenary, bogies
		The most secure railways in the world are equipped with key transfer safety locks which offer robustness, easy use, easy installation as well as unequalled lifetime.
		Catenary must be retracted and switched off and to the earth before any lifting operation..The line must be protected against any train arrival by point position and derailing stop.
		For easy maintenance, numerous workshop are now equipped of retractable catenaries, cranes movements must be interlocked with retractable caternary positions to avoid any risk for workers and damages on trains.
	www.servtrayvou.com /english/ap-railway-safety-systems.htm (860 words)

	KLK ELECTRO MATERIALES
		The rigid Catenary is an overhead electricity feeding system for railways alternative to the standard Catenary.
		Its particular characteristics made it the most suitable system for tunnels because despite of that the initial installation cost is higher, the tunnel clearance needed is lower and then the maintenance cost is much lower.
		The rigid Catenary consist mainly in a aluminium profile of high mechanical ruggedness designed to fit the contact wire and with adequate current carrying capacity to act also as feeding conductor.
	www.klk.es /home/ing/catenaria_rigida/imprimir.htm (286 words)

	[IRFCA] Indian Railways FAQ: Electric Traction - I
		The catenary connected to the DC power supply does not reach all the way to the catenary connected to the AC power supply; there is a neutral section between them.
		Other than that, there are a few points where the catenary has a gap (no cable physically present, not even a neutral or dead section), for instance at level crossings where there is provision for extra-tall road traffic, in which case the pantograph has to be lowered as the loco coasts through the gap.
		It is thought that this practice arises from the idea that entanglement of the catenary by the front pantograph may result in damage to the rear pantograph as well as the debris or broken equipment lands on it, and using the rear pantograph lessens the chance of this.
	irfca.org /faq/faq-elec.html (3941 words)

	South African Railways in H0 scale, Magersfontein
		Trains may be interchanged between lines and facilities exist for the replacement of motive power from electric to diesel electric and even steam.
		The main lines of the real South African Railways are built to a gauge of 3 feet 6 inches.
		The catenary is connected to the common return, thus assisting with conductivity to the electric locomotives.
	www.eastbank.btinternet.co.uk /rsa.htm (452 words)

	Electric Railroads (in progress)
		Amtrak installed catenary of 25,000 volts at 60 Hertz from New York to Boston, converting the New Haven's old 25 Hz electrification to 60 Hz between New York and New Haven.
		Either there must be another train nearby demanding power or the substations that supply power to the catenary must be capable of having power flow in the reverse direction: from the catenary to the power grid of the country or region (50 or 60 Hz).
		Another problem is that for the energy to flow down the catenary away from the train, the voltage at the braking train must be higher than the normal catenary voltage.
	www.lafn.org /~dave/trans/rail/electric_rr.html (8215 words)

	Mechanical and electrical installations for railways (Site not responding. Last check: 2007-10-17)
		Modern railways are dependent on electrical and mechanical installations.
		This infrastructure includes the primary railway systems, such as rails, traction power and signalization as well as auxiliary systems that are required in order to ensure the safety and availability of the railway.
		COWI provides comprehensive consultancy in relation to railway installations with a special view to the complex interfaces between the various installations and the interfaces to civil works.
	www.cowi.dk /cowi/en/menu/services/transport/railwaysandmetro/mechanicalandelectricalinstallations/mechanicalandelectricalinstallationsforrailways (259 words)

	[IRFCA] Indian Railways FAQ: Electric Traction - I
		The catenary connected to the DC power supply does not reach all the way to the catenary connected to the AC power supply; there is a neutral section between them.
		Other than that, there are a few points where the catenary has a gap (no cable physically present, not even a neutral or dead section), for instance at level crossings where there is provision for extra-tall road traffic, in which case the pantograph has to be lowered as the loco coasts through the gap.
		It is thought that this practice arises from the idea that entanglement of the catenary by the front pantograph may result in damage to the rear pantograph as well as the debris or broken equipment lands on it, and using the rear pantograph lessens the chance of this.
	www.irfca.org /faq/faq-elec.html (3976 words)

	History
		The repercussion of the world crisis provoked by the conflict war of the year 1914, next to the scarcity and shortage of the fuel created a raises excessive in the cost of exploitation of the Railroads of the State.
		The mensager that maintains to the thread of contact and constitutes the catenary exactly such, is of steel Martin Siemens of 9.5 mm.
		Besides this, a negative wire of aluminum of 85 mm2 runs besides the posts that maintains the catenary, except in the sectors where double way exists, and that carries connections to the rail each 1.500 m.
	members.fortunecity.es /locomotoraselectricas/introeng.htm (1759 words)

	Chicago ''L''.org: Vocabulary
		catenary: A particular type of overhead system for the provision of traction power to transit vehicles, typical of interurban railways, modern light rail systems, or electrified main line railroads.
		As opposed to the "direct suspension" system in which the wire a rail car receives power from is attached directly to the overhead support (whether it be a crosswire, metal arm, bracket, or other support), a catenary system consists of a "messenger wire" suspended loosely between the overhead supports.
		There are a few different types of catenary systems and the type the North Shore (and subquently the Yellow Line) used was called a "compound catenary" system, which used two messenger wires rather than just one.
	www.chicago-l.org /vocab.html (4513 words)

	SERBIAN RAILWAYS - CL Installations
		Contact line (called CL) is a part of stable installations of electric traction, which are used for the quality supply of electric-traction stock with electric energy, and on the electrified railway lines.
		The electrification of the railways on the Serbian Railways begun in 1986 with mono-phase, alternating current system 25kV, 50Hz.
		Untill now, 2000 km of track was electrificated, which is 1/3 of all the railways built.
	www.zeleznicesrbije.com /active/en/home/glavna_navigacija/infrastruktura/elektrotehnicka_postrojenja/km_postrojenja.html (248 words)

	:: barinmodell.com ::
		As a construction engineer, I have been involved in three railway projects in recent years in different countries and this involvement has brought my attention deeper into the subject catenary, especially the various solutions implemented in Switzerland by different railway companies.
		The experience I have gathered through the realization of those projects, had been brought into the catenary in scale 1 / 87 in order to reach the highest possible quality, which are continuously being improved.
		I believe in presentation of those catenary poles in correct environment and therefore I have a couple of years ago started to build moduls for this purpose.
	www.barinmodell.com (302 words)

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