Page 560 - IRSEM_Main Book

3.4 Maintenance and Action in the Event of Accidents, etc.

3.4.1 Maintenance Type: The Maintenance types shall be as follows:
a. Preventive Maintenance: Preventive Maintenance shall be performed to detect, in
an effective method, a risk that functions of equipment are lost and to perform
necessary treatment to avoid such situation. It shall cover equipment of which
breakdown can directly affect train operation or seriously affect customer service.
b. Corrective Maintenance: Corrective Maintenance shall be performed basically for
the treatment after breakdown of equipment.

On-Board Display:

The meaning of terms in this Implementation Standard shall be defined as below:
1. "○× Signal" means a kind of stop signal indicated when the Train (including Vehicle) is
required to stop immediately.
2. "0 Signal" means a kind of stop signal indicated when the Train (including Vehicle) is
required to stop normally before the end of the Route which is indicated by ATC.

3. "02 Signal" means a kind of ○×Signal indicated when ATC Control Information is not
received, or when such ATC Control Information is received like in case PESB is pushed.
4. "03 Signal" means a kind of ○×Signal indicated when the Train (including Vehicle) over
runs the stopping limit without proper authority.

5. "Approach Lock" means a kind of lock function of interlocking system. Approach Lock
shall lock the Turnouts on the set Route when the Train (including Vehicle) enters
approach section.

6. "ATC Control Information" means control information transmitted to a Train (including
Vehicle) within an ATC Route.

Annexure G2: Brief of High Speed Signalling – Mumbai-Ahmedabad Page 503 of 535