What are the principles of signalling?
By definition, the signaling principles are the underlying principles of a signalling-based safeworking system that are based on the national standards but are independent of the requirements of a specific railway operating company and of the technology used.
How many types of signals are there in Indian Railways?
3.09. (1) The Stop signals which control the movement of trains approaching a station are of three kinds, namely-Outer, Home and Routing signals.
What is the purpose of railway Signalling?
Most signalling systems use trackside signals to control the safe movement of trains and tell drivers what to do. A colour light signal shows different colours to authorise train movements. Many have additional indicators to show which route has been set up for the train and which way it must go.
What are the principles of interlocking?
– The basic principles of interlocking may be laid down as follows :- 1. It shall not be possible to take “off” conflicting signals at one and the same time. 2. It shall not be possible to take “off” signal for the running line until :- (a) all points on the running line are correctly set and facing points locked.
What are principles of Signalling in railways?
The principal function of a signalling system, as part of a safeworking system, is to communicate movement authorities from a network control officer to rail traffic crews so as to allow the safe and efficient operation of a railway.
What is the main features of cabs Signalling?
CABS signalling allows for multiple speed profiles within the same block. The driver will receive an indication on the Train Overview Display (TOD) when there is a speed transition. Allows the train to travel at higher speeds with smaller blocks. Reduces the headway between trains, increasing the capacity.
How do you read a railway signal?
Many other color combinations are used. Some are common, others are unique to a specific railroad. The most constant signals and the easiest to understand are single-head block signals. Red means stop; green means proceed, and yellow means caution or approach, usually indicating that the next signal is red.
What are the objectives of signaling?
The objectives of signalling are as follows. (a) To regulate the movement of trains so that they run safely at maximum permissible speeds. (b) To maintain a safe distance between trains that are running on the same line in the same direction.
What are the basic concepts of railway signalling?
1. Electrical supply used for Signaling purposes. Different equipments need different voltages. 2. Supply is extended by Electrical department based on the requirement of signalling. 3. Signalling […] Metro Rail Basic Signalling Concepts Control over movement of Trains & Development of signals. 1. This mode has its own inherent problems. 2.
Which is the best website for railway signalling?
Infopaper No. 6 Basic Railway Signalling Railway Technical Website thPage 2 Updated 7 May 2017
How are interlocking devices used in railway signaling?
An interlocking is an arrangement of signal apparatus that prevents conflicting movements through an arrangement of tracks such as junctions or crossings. Interlocking system use mechanical devices both to operate the signaling device and ensure their safe operation. Electrical relay interlocking were used.
Why does a red signal show behind a train?
Although there is no train occupying the block protected by Signal A121, the signal is showing a red aspect because the train is occupying the overlap track circuit or “replacing” track circuit, as it is sometimes called. This will give rise to two red signals showing behind a train whilst the train is in the overlap.