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The diamond-shaped, electric-rod pantograph of the Swiss cogwheel locomotive of the Schynige Platte railway in Schynige Platte, built in 1911 Cross-arm pantograph of a Toshiba EMU. A pantograph (or "pan" or "panto") is an apparatus mounted on the roof of an electric train, tram or trolley buses [1] to collect power through contact with an ...
One of the most notable differences in appearances between the two locomotives was the pantograph(s): the El-C had one double-arm (Stemmann) pantograph, whereas the E44 had two single-arm (Faiveley) pantographs: a characteristic born of the PRR's operating practice of having two pantographs per locomotive.
These are normally based on a vision system which takes pictures of the pantographs and performs an analysis based on computer vision algorithms. A pantograph uses a carbon strip to conduct electricity between the catenary and the pantograph. When these are damaged or worn out, the pantograph can tear down the catenary causing train delays.
The Arrow IIIs also featured the twin-arm Stemmann pantographs as on the Arrow Is, built by the United Knitting Machine corporation. These were replaced with single arm TransTech type pantographs between 2011 and 2014. The large central air scoop over the center of the roof on each cab end is the final major spotting feature.
Baldwin-Westinghouse steeple cab electric locomotives operating as Iowa Traction Railroad (IATR) 50 and 54 in Mason City, Iowa, in 2009. Examples served with the Oshawa Electric Railway in Oshawa, Ontario. These were delivered in the 1920s to provide freight service within the city, serving mainly the General Motors plant. [10]
Pantograph-equipped locomotives must not run through a section break when one side is de-energized. The locomotive would become trapped, but as it passes the section break the pantograph briefly shorts the two catenary lines. If the opposite line is de-energized, this voltage transient may trip supply breakers.
A New Haven EP-1 electric locomotive, circa 1907. Note the small DC pantograph between the two larger AC pantographs. The New York, New Haven and Hartford Railroad pioneered electrification of main line railroads using high-voltage, alternating current, single-phase overhead catenary.
Finally, the New York Central employed overhead lines over railroad switches in place of third rail electrification. [4] To support these myriad methods, Westinghouse installed two sets of pantographs, one for AC and one for DC collection, and a contact shoe for third rail operation. Control devices within the locomotive prevented drawing power ...