Page 511 - IRSEM_Main Book

(b) For other signalling installations, with less than 100 routes, air-conditioning
may be provided for those installations which are
(i) prone to dust (coal dust, stone dust, iron ore etc.) or

(ii) in the vicinity of chemical/fertilizer/other industrial factories releasing
harmful fumes or

(iii) in areas with extreme temperature with the agreement of PCSTE and
PCEE.

(c) AC equipments shall be provided and maintained by Electrical department.
Such ACs shall be connected with the local power supply. The switch to
operate AC shall be outside the relay room.

(d) 'Automatic Fire Detection and Alarm System' may be provided at all
stations irrespective of number of routes.

(e) Automatic Fire Suppression System' along with “Automatic Fire Detection
And Alarm System” may be provided at stations with more than 400
routes.

Note: In case provision of “Automatic fire suppression system” along with “Automatic Fire
Detection And Alarm System” is considered desirable by Zonal Railways at critical stations
and important junction stations even below 400 routes, same may be provided with the
approval of competent authority (i.e. PCSTE).

(f) Firefighting equipment shall also be kept in the power supply equipment
room.

(g) Suitable standard earthing shall be provided for all control panel, power
supply, switch board, transformers, inverters etc.

(h) At all Relay Interlocking Installations, Data Logger shall be provided.

(i) Communication between the SM's panel room, relay room, equipment
room and locations shall be provided.

21.3.5 Lightning & surge protection, Earthing: Shall be done as per Section 5 of
this chapter.

21.3.6 Testing & Commissioning of Relay Interlocking:

(a) Once the indoor wiring works are completed before conducting the system
Integrity testing, simulation test shall be conducted by simulating field
gears such as Track circuits, Signals & Points on a simulation panel and
errors removed. This will ensure the correctness of indoor wiring before
connecting to outdoor gears.

(b) Testing of wiring & Commissioning shall be done as per Para 19.8.5 to 19.8.12.

(c) Recommended check list of items for commissioning is given at
Annexure: 21-A2. This list may be suitably modified as needed.

Chapter 21: Relay & Electronic Interlocking Page 454 of 535