Page 380 - IRSEM_Main Book

(c) If DG Set is installed inside the room, exhaust pipe shall be extended
outside the generator room and the silencer fixed away from the premises.
Exhaust pipe shall be appropriately insulated.

(d) The starting battery shall be of adequate capacity to meet the starting load.
Where automatic start has been provided, the generator once started
should stop only with a time delay after main supply is resumed.

(e) The connection between the battery and the DG Set shall be done with
wires of sufficient cross section to avoid drop in voltage.

(f) The self-starting battery shall normally be on trickle charging mode.

Section 8: Maintenance of Secondary Cells

16.8.1 (a) Maintenance, testing and repair work on the cells, which may interfere with
safe operation of trains shall not be started until movements are fully
protected. Temporary repairs or adjustments shall be made in such a
manner that safety of train operation is not impaired when repairs and or
adjustments are made. Tests shall be immediately carried out to ensure
that the connected equipment functions satisfactorily.

(b) The battery room and location boxes shall be kept well ventilated, free
from water, oil or dust. Surroundings and batteries shall be kept clean.

(c) Connecting cables shall be flexible and sufficiently long, to prevent strain
on the battery terminals.

(d) The electrical connection shall always be kept tight.

(e) The terminals and connections shall be coated with pure vaseline or
petroleum jelly to prevent corrosion. Grease shall not be used.

(f) The Electrolyte shall be maintained at the correct level by topping up as
often as necessary with distilled water.

(g) Electrolyte lost due to spillage shall be recouped with electrolyte of the
same specific gravity as that of other cells in the circuit. Electrolyte shall
not be added in any other circumstances.

(h) Each cell shall be tested periodically and its cleaning and charging
arranged so that its voltage and specific gravity are within specified limits.
Test results and dates of cleaning and charging adjustments shall be
recorded on the format enclosed as Annexure:16-MS2, Annexure:16-MS4.
A separate card shall be maintained for each battery set. The voltage of
individual cell shall not fall below 1.85 Volts.

Chapter 16: Power Supply Systems for Signalling Installations Page 328 of 535