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Amtrak's 60 Hz Traction Power System
Amtrak operates a 60 Hz traction power system along the Northeast Corridor between New Haven, Connecticut,Specifically, Amtrak's 25 kV system begins at the Mill River Interlocking about two miles north of New Haven Union Station and Boston, Massachusetts. This system was built in the late 1990s and supplies locomotives with power from an overhead lines, overhead catenary system at 25 kV alternating current with a frequency of 60 Hz. The system is also commonly known as the ''Northend Electrification'', in contrast to the ''Amtrak's 25 Hz traction power system, Southend Electrification'' that runs between New York City and Washington, D.C. History In 1992, Congress passed the ''Amtrak Authorization and Development Act'' requiring Amtrak to establish high-speed rail passenger service between New York City and Boston. The goal was to reduce travel time in this corridor from 4.5 hours to less than 3 hours. Revenue from this service was expected to play a critical role ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trains (magazine)
''Trains'' is a monthly magazine about trains and railroads Rail transport (also known as train transport) is a means of transport that transfers passengers and goods on wheeled vehicles running on rails, which are incorporated in tracks. In contrast to road transport, where the vehicles run on a prep ... aimed at railfan, railroad enthusiasts and railroad industry employees. The magazine primarily covers railroad happenings in the United States and Canada, but has some articles on railroading elsewhere. It is among the 11 magazines published by Kalmbach Media, based in Waukesha, Wisconsin. It was founded as ''Trains'' in 1940 by publisher Al C. Kalmbach and editorial director Linn Westcott. From October 1951 to March 1954, the magazine was named ''Trains and Travel''. Jim Wrinn, a former reporter and editor at the ''Charlotte Observer'', served as editor from 2004 until his death in 2022. Carl A. Swanson succeeded him. Editors * Al C. Kalmbach, 1940–1948 * Willard V. A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Railway Electrification Systems
This is a list of the power supply systems that are, or have been, used for tramway and railway electrification systems. Note that the voltages are nominal and vary depending on load and distance from the substation. Many modern trams and trains use on-board solid-state electronics to convert these supplies to run three-phase AC induction motors. Tram electrification systems are listed here. Key to the tables below * Volts: voltage or volt * Current: ** DC = direct current ** # Hz = frequency in hertz (alternating current (AC)) *** AC supplies are usually single-phase (1Ø) except where marked three-phase (3Ø). * Conductors: ** overhead line or ** conductor rail, usually a third rail to one side of the running rails. Conductor rail can be: *** top contact: oldest, least safe, most affected by ice, snow, rain and leaves. Protection boards are being installed on most top contact systems, which increases safety and reduces these affections. *** side contact: newer, safer, less aff ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrification Of The New York, New Haven, And Hartford Railroad
The New York, New Haven and Hartford Railroad pioneered electrification of main line railroads using high-voltage, alternating current, single-phase overhead catenary. It electrified its mainline between Stamford, Connecticut, and Woodlawn, New York, in 1907, and extended the electrification to New Haven, Connecticut, in 1914. While single-phase AC railroad electrification has become commonplace, the New Haven's system was unprecedented at the time of construction. The significance of this electrification was recognized in 1982 by its designation as a National Historic Engineering Landmark by the American Society of Mechanical Engineers (ASME). Initial experiments The New Haven tried several experiments with low-voltage DC electrification in the decade preceding their main line overhead electrification. These included: *1895 electrification of of line between Nantasket Junction and Pemberton, Massachusetts using overhead copper contact wire at 600-700 Vdc. *This line was ext ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amtrak's 25 Hz Traction Power System
Amtrak's 25 Hz traction power system is a Traction power network, traction power grid operated by Amtrak along the southern portion of its Northeast Corridor (NEC): the 226.6 route miles (362 km) between Washington, D.C. and New York City and the 104 route miles (167 km) between Philadelphia and Harrisburg, Pennsylvania. The Pennsylvania Railroad constructed it between 1915 and 1938. Amtrak inherited the system from Penn Central, the successor to the Pennsylvania Railroad, in 1976, along with the Northeast Corridor. This is the reason for using 25 Hz, as opposed to 60 Hz, which is the standard for power transmission in North America. In addition to serving the NEC, the system provides power to NJ Transit Rail Operations (NJT), the SEPTA, Southeastern Pennsylvania Transportation Authority (SEPTA) and the MARC Train, Maryland Area Regional Commuter Train (MARC). Only about half of the system's electrical capacity is used by Amtrak. The remainder is sold to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
25 KV AC Railway Electrification
Railway electrification systems using alternating current (AC) at are used worldwide, especially for high-speed rail. It is usually supplied at the standard utility frequency (typically 50 or 60Hz), which simplifies traction substations. The development of 25kV AC electrification is closely connected with that of successfully using utility frequency. This electrification is ideal for railways that cover long distances or carry heavy traffic. After some experimentation before World War II in Hungary and in the Black Forest in Germany, it came into widespread use in the 1950s. One of the reasons why it was not introduced earlier was the lack of suitable small and lightweight control and rectification equipment before the development of solid-state rectifiers and related technology. Another reason was the increased clearance distances required where it ran under bridges and in tunnels, which would have required major civil engineering in order to provide the increased clearance t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Autotransformer
An autotransformer is an electrical transformer with only one winding. The "auto" (Greek for "self") prefix refers to the single coil acting alone, not to any kind of automatic mechanism. In an autotransformer, portions of the same winding act as both the primary winding and secondary winding sides of the transformer. In contrast, an ordinary transformer has separate primary and secondary windings which have no metallic conducting path between them. The autotransformer winding has at least three taps where electrical connections are made. Since part of the winding does "double duty", autotransformers have the advantages of often being smaller, lighter, and cheaper than typical dual-winding transformers, but the disadvantage of not providing electrical isolation between primary and secondary circuits. Other advantages of autotransformers include lower leakage reactance, lower losses, lower excitation current, and increased VA rating for a given size and mass. An example of an ap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Split Phase
A split-phase or single-phase three-wire system is a type of single-phase electric power distribution. It is the alternating current (AC) equivalent of the original Edison Machine Works three-wire direct-current system. Its primary advantage is that, for a given capacity of a distribution system, it saves conductor material over a single-ended single-phase system, while only requiring a single phase on the supply side of the distribution transformer. This system is common in North America for residential and light commercial applications. Two 120 V AC lines are supplied to the premises that are out of phase by 180 degrees with each other (when both measured with respect to the neutral), along with a common neutral. The neutral conductor is connected to ground at the transformer center tap. Circuits for lighting and small appliance power outlets (i.e., NEMA 1 and NEMA 5) use 120 V circuits - these are connected between one of the lines and neutral using a single-pole circuit breake ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
