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Which current collector use for high speed tramways and trains?
Cable
Pole
Bow
Panto-graph
Bow
The Bow collector is historically significant and is often used for high-speed tramways and specific types of electric trains. It consists of a collector strip mounted on a framework that maintains contact with the overhead wire, capable of handling higher currents and speeds compared to simple trolley poles.
The Bow collector is historically significant and is often used for high-speed tramways and specific types of electric trains. It consists of a collector strip mounted on a framework that maintains contact with the overhead wire, capable of handling higher currents and speeds compared to simple trolley poles.
FcтАЛ=PcтАЛ+I2R тАФ Represents the total power loss where PcтАЛ is contact loss and I2R is the ohmic loss.
The Bow collector uses a spring-loaded or pneumatically operated frame that presses a sliding contact strip against the overhead conductor wire. As the vehicle moves, the strip maintains continuous electrical contact through friction, allowing for effective current collection at moderate to high speeds while being less prone to dewiring than a trolley pole.
Used extensively in early electrified railways and tramway systems.
Superior current collection capability compared to pole collectors.
Requires proper lubrication of the overhead wire to reduce wear.
Maintains orientation automatically during bidirectional movement.
Better contact stability at higher speeds than trolley poles.
Eliminates the need for manual pole adjustment at terminals.
Higher current carrying capacity for heavy traction.
Increased wear on the overhead contact wire due to sliding friction.
Heavier construction increases structural load on the locomotive roof.
Less aerodynamic than modern single-arm pantographs.
Electric Tramways
Suburban Electric Trains
Industrial Locomotives
While modern high-speed trains predominantly use the Pantograph, the Bow collector was the essential predecessor that allowed for the transition from low-speed trolley systems.
Option D (Pantograph) is actually the most common standard for modern high-speed rail, though the Bow collector is specifically highlighted in this context as an alternative to the trolley pole.
C is correct тАФ The Bow collector is the traditional mechanical device used for high-speed tramways and rail systems to ensure stable contact with the overhead line.
In competitive exams, remember that Pantograph is the industry standard for modern high-speed trains, while the Bow collector is identified specifically for tramways and legacy systems.