Page 379 - IRSEM_Main Book

(i) Always acid shall be added to water. During mixing, the solution must be stirred
o
constantly so that its temperature does not exceed 50 C. Suitable protection
like goggles, rubber gloves & an apron shall be used while working on
electrolyte.

(j) On receipt of charged secondary cells, level of the electrolyte shall be
noted. If it is below the prescribed level, the loss may be due to spillage
during transit. The level of the electrolyte can be restored by adding battery
grade acid of recommended specific gravity.

(k) Hydrometer of approved type shall be available in the battery room.

(l) At the time of installation, capacity test shall be done and record shall be
maintained, by an official not below the rank of SSE/JE(Signal).

Section 6: Installation of Power Supply Equipment

16.6.1 Procedure for Installation

(a) The power supply equipment shall be so installed, as to facilitate easy
replacement of equipment without affecting the other circuits as far as
possible. It is desirable to provide ring main type of power supply
arrangement at large stations.

(b) Transformers and battery chargers of adequate capacity and of air-cooled
type shall be provided.

(c) Power equipment shall be housed in well ventilated locations/rooms.

(d) Wires connecting equipment shall be of adequate size so that there is not
more than 0.5% loss in voltage.

(e) Battery leads shall be colour coded (Red for positive, Black for negative
and Green for earth terminal) and cut to correct length. They shall be
crimped/soldered to appropriate terminal.

(f) Maintenance instructions for self-regulating battery charger as per
IRS:S:86-2000 are given in Annexure:16-MS3. Installation shall be done by
an official not below the rank of SSE/JE(Signal), as per RDSO specification
No.IRS. S86-2000 or latest.

(g) All power equipment along with suitable SPDs shall be connected to
earthing, having earth resistance <1 ohm.

Section 7: Installation of DG Set

16.7.1 (a) Environmental friendly DG sets shall be installed at suitable location with
proper foundation.

(b) The diesel generator set shall be mounted on anti-vibration pads.

Chapter 16: Power Supply Systems for Signalling Installations Page 327 of 535