Page 598 - IRSEM_Main Book

S No Term Description/Meaning in SEM Relevant paras
133 Safety One of a number of defined discrete levels for specifying the Safety Integrity requirements 13.1.3(c),
Integrity Level for safety related functions to be allocated to the safety related systems. Annexure: G1(4)

Documented set of time scheduled activities, resources and events serving to implement the Annexure: G1
134 Safety Plan organizations, responsibilities, procedures, activities, capabilities and resources that together
ensure that an item will satisfy given safety requirements of relevant.
Safety Related A system is safety related if its failure can cause harm to life and property eg. Interlocking Annexure: G1
135
Systems System, ATP or carries responsibility for safety.
A type of Testing done to check whether Software logics & Hardware of Equipment are 21.5.2(a)
Site
responding in accordance with given Control Tables. This is done duly connecting Equipment
136 Acceptance Hardware with Interface wiring in Relay Room and simulating outdoor signals, Points, Track
Test (SAT)
circuit.
Section The maximum number of trains that can be dealt on a given section of Railway during the 18.12.1(a)
137
Capacity period of twenty four hours.
Sectional 17.3.13, 19.8.9(d),
138 Route Release Route releasing designed to release sequentially usually one track section at a time behind 21.1.12(a)
the train on it`s passage.
(SRR)
Semaphore Chapter 12, Section 5
139 A signal in which the day indications are given by the position of a semaphore arm.
Signal
13.1.5(d), 13.2.3(i),
Service Brake/
140 It is the brake command which reduces the Brake Pipe pressure to 1.5 Kg/Cm2. 13.3.5(b)
Normal Brake

Means the movement of a vehicle or vehicles with or without an engine or of any engine or 7.3.5, 7.3.6(c), 7.4.7,
141 Shunting any other self-propelled vehicle for the purpose of attaching, detaching or transfer or for any 18.1.6(c),
other purpose. 12.22.1(a)
Sighting The distance over which the most restrictive aspect of a signal is visible from the driving 14.1.9(a)(iii)
142
Distance compartment of an approaching train under normal conditions of visibility.
Adequate distance in advance of a stop signal, which should be kept clear before the signal in 7.1.9, 8.1.5(b), 13.2.3(j)
143 Signal Overlap
rear can be taken 'OFF'.

Annexure: G4: Glossary of Technical Terms for Signal Engineering Manual Page 527 of 535