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The branch-line coupler consists of two parallel transmission lines physically coupled together with two or more branch lines between them. The branch lines are spaced λ/4 apart and represent sections of a multi-section filter design in the same way as the multiple sections of a coupled-line coupler except that here the coupling of each ...
Rail transport terms are a form of technical terminology applied to railways. Although many terms are uniform across different nations and companies, they are by no means universal, with differences often originating from parallel development of rail transport systems in different parts of the world, and in the national origins of the engineers and managers who built the inaugural rail ...
mechanical coupling of vehicles only, requires manual connection of pneumatic and electrical lines; mechanical coupling of vehicles with automatic connection of pneumatic lines, requires manual connection of electrical lines; mechanical coupling of vehicles with automatic connection of pneumatic and electrical lines (but not data transmission ...
A time-domain reflectometer; an instrument used to locate the position of faults on lines from the time taken for a reflected wave to return from the discontinuity.. A signal travelling along an electrical transmission line will be partly, or wholly, reflected back in the opposite direction when the travelling signal encounters a discontinuity in the characteristic impedance of the line, or if ...
This is because the line might become inadvertently charged (e.g. through a back-charged transformer, possibly as a result of an improperly connected, inadequately isolated emergency generator at a customer facility), or inductively coupled from an adjacent in-service line. To prevent this, the line is first grounded via a clamp known as a bond ...
The Denver & Rio Grande Railway (D&RG) was incorporated on October 27, 1870, by General William Jackson Palmer (1836–1909), and a board of four directors. It was originally announced that the new 3 ft (914 mm) railroad would proceed south from Denver and travel an estimated 875 miles (1,408 km) south to El Paso via Pueblo, westward along the Arkansas River, and continue southward through the ...
The generic term used by the International Union of Railways for the technology is overhead line. [1] It is known variously as overhead catenary, overhead contact line (OCL), overhead contact system (OCS), overhead equipment (OHE), overhead line equipment (OLE or OHLE), overhead lines (OHL), overhead wiring (OHW), traction wire, and trolley wire.
This coupling is used by Spanish firefighters, and is defined by Spanish Standard UNE 23400. [15] It is a sexless coupling with three engaging lugs, and is available in several different sizes, including Barcelona 25 (25 mm hose ID), Barcelona 45 (45 mm hose ID), and Barcelona 70 (70 mm hose ID). Suitable for delivery (pressure) only, not suction.
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