Page 591 - IRSEM_Main Book

S No Term Description/Meaning in SEM Relevant paras
12.26.3(a), 21.1.4,
Main Signal/
91 The Signal governing the movement of a running train. (Not a shunt movement) 7.1.3, 7.1.5(d),
Running Signal
20.3.3(b), 21.1.9(c)
Ability to be retained in, or restored to, a state to perform as required, under given Annexure: G1(1.1,(3.2)
92 Maintainability
conditions of use and maintenance.
93 Material Train Means a departmental train intended solely or mainly for carriage of railway material when Annexure: 22-A2
picked up or put down or for execution of works, either between stations or within station
limits.
Means a train intended for the carriage of passengers and goods, or of passengers, animals
94 Mixed Train
and goods.
Most
The speed which a train must not exceed. It is the lowest speed taking into account all the
95 Restricted
various speed profiles.
Speed Profile
Movement
96 Safe distance of travel communicated by the Automatic Train Protection System. 13.2.1(d), 13.2.3 (c),(e)
Authority (MA)
Considering the need for higher order of safety, as well due to the presence of halts at Annexure: G-3 (11,13)
frequent intervals of even less than a KM length, Primarily the train detection is done by
97 Moving Block communication, based on the train location, the movement of authority is to be updated
which is known as a moving block, which include a safety envelope behind and in front of a
train, always moving along with the train.
Multi Section 3.8.4(e), 8.7.1(c),
Digital Axle Multi Section Digital Axle Counter is a Digital Axle Counter used to monitor more than single 11.1.2(f), 21.1.1 (d),
98
Counter track section either at Stations or in Block sections. 21.1.17(d)
(MSDAC)
Multiple 7.1.8, 7.3.2, 7.3.6(a),
Means a Signalling arrangement in which signals display at any one time any one of the three
Aspect 12.5.12, 12.5.13,
99 or more aspects and in which the aspect of every signal is pre-warned by the aspect of the
Signalling previous signal or signals. 14.1.7(b),
(MACLS)

Annexure: G4: Glossary of Technical Terms for Signal Engineering Manual Page 523 of 535