In this article, we will take a look at insulated overlap and uninsulated overlap, which are overhead equipment used in electric traction systems.What is an Overhead Equipment?Overhead Equipment (OHE) in electric traction system are used for transmitting electrical energy to the electric locomotives, trolley buses, trams and other electric traction ... Read More

What is an Electric Elevator?Electric elevatrors are the electrically operated devices which are used for lifting up and down, moving load in suitable direction, and lifts in multistoried buildings for facilitating up and down movements of occupants, etc. Therefore, it can be said that an electric elevator is an electrically ... Read More

In this article, we will see how booster transformers are used in electric traction systems for reducing the interference with the communication systems. We will also take a look at the methods of connecting the booster transformer in a traction system.In AC traction systems, the return current mainly flows to ... Read More

What is a Trolleybus?A trolleybus is an electric bus that draws its electricity from overhead wires, which are generally suspended from roadside posts, using spring loaded trolley poles. The trolleybus is also known as trolley coach or trackless trolley or trackless tram. The trolleybus is a pneumatic tyre vehicle.In case ... Read More

Specific Energy ConsumptionThe amount of energy input to the traction motors is known as energy consumption of the train. It is the energy consumed for the propelling the train. The total energy drawn from the distribution system is greater than this energy and is equal to the energy consumed by ... Read More

What is Pantograph Collector?The current in the overhead system is collected with the help of a sliding contact collector mounted on the roof of the vehicle. The pantograph current collector is used in the railways for collection of current from the overhead system where the operating speed of the train ... Read More

When the train is accelerated up to a certain speed it requires energy, which is known as kinetic energy, corresponding to that speed. This kinetic energy is given by the expression, $$\mathrm{KE\mathrm{\: =\: }\frac{1}{2}\mathit{mv^{\mathrm{2}}}}$$During coasting period, a part of this stored energy is utilized in propelling the train against frictional ... Read More

What is Regenerative Braking?The method of braking in which no energy is drawn from the supply system during braking period and some of the energy (kinetic energy of rotating parts) is fed back to the supply system is known as regenerative braking.The regenerative braking is the most efficient method of ... Read More

In this article, we will throw some light on the different safety and protective devices used in electric elevators.Electric elevators are the electrically operated devices which are used for lifting up and down, moving load in suitable direction, and lifts in multistoried buildings for facilitating up and down movements of ... Read More

In this article, we will take a look at the different types of electric motors used in the elevators. We will also discuss the suitability of different motors in different types of elevators, power calculation, starting torque requirements, and speed control methods of elevator motors.What is an Elevator Motor?An elevator ... Read More