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In particular the parallel route of 110 kV and 220 kV three-phase AC is common. The use of 380 kV power lines on the same pylon requires 220 kV insulators for the traction current line, because in case the 380 kV line fails, voltage spikes can occur along the traction current line, which the 110 kV insulators cannot handle.
Amtrak Avelia Liberty trainset operating under the 25 Hz traction power system near Claymont, Delaware. Amtrak's 25 Hz traction power system is a traction power network for the southern portion of the Northeast Corridor (NEC), the Keystone Corridor, and several branch lines between New York City and Washington D.C.
This is a list of the power supply systems that are, or have been, used for railway electrification. Note that the voltages are nominal and vary depending on load and distance from the substation. As of 2023 many trams and trains use on-board solid-state electronics to convert these supplies to run three-phase AC traction motors.
Amtrak’s 60 Hz traction power system operates along the Northeast Corridor between New Haven, Connecticut, [note 1] and Boston, Massachusetts. This system was built by Amtrak in the late 1990s and supplies locomotives with power from an overhead catenary system at 25 kV alternating current with at 60 Hz, the standard frequency in North America.
This is a route-map template for Amtrak's 25 Hz traction power system, a United States traction power network.. For a key to symbols, see {{railway line legend}}.; For information on using this template, see Template:Routemap.
The new electrical infrastructure included the installation of approximately 130 to 140 miles (210 to 230 km) of 25 kV 60 Hz single-phase AC overhead contact lines and ten new power stations (two traction power stations, a switching station approximately halfway along the line, and seven paralleling stations). [24]
Occasionally 25 kV is doubled to 50 kV to obtain greater power and increase the distance between substations. Such lines are usually isolated from other lines to avoid complications from interrunning. Examples are: The Sishen–Saldanha iron ore railway (50 Hz). The Deseret Power Railway which is an isolated coal railway (60 Hz). [8]
High speed lines in France, Spain, Italy, United Kingdom, the Netherlands, Belgium and Turkey operate under 25 kV, as do high power lines in the former Soviet Union as well. A pylon of a single-phase AC 110 kV power line near Bartholomä in Germany. Lines of this type are used in Germany to supply electric railways with single-phase AC at 16.7 ...