Balanced Earth-fault Protection of Alternator This scheme provides protection against earth-faults only (in small-size alternators where Differential protection is not possible to apply). It provides no protection against phase-to-phase faults, unless and until they...
Regenerative braking takes place whenever the speed of the motor exceeds the synchronous speed. This baking method is called regenerative baking because here the motor works as generator and supply itself is given power...
Plugging : It is a simple method of electric braking, In this method reversing the connections of the armature terminals of a motor, so as to reverse its direction of rotation which will oppose...
The process of applying brakes and reduce the speed of any moving or rotating equipment can be termed as braking. Mechanical Braking Electrical Braking Types of Electric Braking Rheostatic / Dynamic braking. Regenerative Braking....
Tractive effort: It is the effective force acting on the wheel of locomotive, necessary to propel the train is known as ‘tractive effort’, Ft. The tractive effort is a vector quantity always acting tangential...
The speed-time curve of a main line service is best and most easily replaced by a trapezoid. Since the area of the speed- time curve represents the total distance travelled hence the areas of...
Crest Speed: The maximum speed attained by the vehicle during the run is known as crestspeed. Average Speed: The mean of the speeds from start to stop i.e., the distance covered between two stops...
A speed time-curve is a graph showing the variation of speed with respect to time. The curve drawn between speed and time, taking speed on the Y axis and time on X-axis, is known...
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