Do electric trains have brakes?

A conventional electric train braking system uses dynamic braking, where the kinetic energy of the train is dissipated as waste, mainly in the form of heat. When regenerative braking is employed, the current in the electric motors is reversed, slowing down the train.



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These are basically Air brakes which only applies to the locomotive and not the entire train. These are used to hold the train when parked on non-gradient surface. The air from the reservoir is pumped to the brake cylinders located one on each wheel of the locomotive only, which applies the brakes on the wheels.

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Locomotives are equipped with 2 air brake systems: automatic and independent. The automatic brake system applies the brakes to each locomotive and to each car in the train as well; it is normally used during train operations to slow and stop the train.

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Its main advantage over the air brake is its speed of control and quick on-vehicle reaction times, giving instantaneous control of the whole train to the driver.

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Some locomotives collect electricity from overhead cables, while others take power from a third “live” rail on the track. It is very expensive to build the lines or rails that carry the electric current, but electric locomotives are cleaner, quieter, faster, and more reliable than steam or diesel engines.

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The squeal noise is supposed to be the result of the sound radiation of the structural components of the brake system in self-sustained vibrations. The self-sustained vibrations are supposed to be due to the dynamic instability of the sliding equilibrium of the system.

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a magnet on the track, when the train runs over the magnet it will warn the driver to stop; a transmission loop that tells the train the signal is red, this will trigger the train computer to apply the brake.

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Electric trains need not carry the weight of prime movers, transmission and fuel. This is partly offset by the weight of electrical equipment. Regenerative braking returns power to the electrification system so that it may be used elsewhere, by other trains on the same system or returned to the general power grid.

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Today, steam locomotives generally have to have two independent brake systems in order to be licensed, so that the countersteam brake is not viewed as a braking system, but is nevertheless still used.

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Train brakes hiss because they use pneumatic braking systems. When a train comes to the final destination the air in the system is dumped out to 'park' the train like pulling the parking/hand brake on a car. The brakes normally are on without air so air is pumped in to hold the brakes off when the train moves.

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The mechanism of an emergency brake may differ, depending on railcar design. Emergency-braking a train (without track brakes) will give about 1.5 m/s2 (0.15 g) deceleration. The braking distance will be approximately 250 m (820 ft) at 100 km/h (62 mph) and 600 m (2,000 ft) at 160 km/h (99 mph).

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Disadvantages of electric traction include: high capital costs that may be uneconomic on lightly trafficked routes, a relative lack of flexibility (since electric trains need third rails or overhead wires), and a vulnerability to power interruptions.

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No, trains have no gears, since these are unfeasible. That's why their fuel (if any) is converted to electric energy and then used to run motors.

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When moving with the train, the speed of the train is your speed. You are in the same frame of inertia. When you jump in the train, you do not encounter air resistance, and you usually encounter little to no force and there is no change in your speed. That's why you fall in the same place when you jump.

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