Page 377 - IRSEM_Main Book

The number of solar panels to be installed, shall be decided based on
requirement of charging current and voltage. Regular cleaning to be done
on the surface solar panels to remove dust.

(d) For all new installations even in Non RE area, power supply arrangements
shall be designed suitable to RE.

Section 3: Distribution of Power Supply

16.3.1 Arrangements

(a) The selected supply from the auto/manual change-over panel shall be
distributed to installations/cabins at the station through underground power
cables of approved type. Proper capacity HRC fuses/Miniature Circuit Breakers
(MCBs) shall be provided to protect against overload/short circuits.

(b) Visual Indications showing availability of power supplies from various
feeders shall be provided for information of the ASM/Gate man.

(c) 230 V power supply which is selected from the auto/manual change-over
panel shall be distributed to various power equipments such as IPS,
transformer-rectifier sets, battery chargers, transformers etc. through a
distribution panel. Proper capacity HRC fuses/MCBs, lightening and surge
protection devices shall be provided for protection of the equipment against
overload and lightning/surges.

(d) Power supply system shall be monitored through Datalogger as required.

Section 4: Power Supply Equipment

16.4.1 Equipment General

(a) All power supply equipment such as battery chargers, transformers, voltage
regulators, transformer-rectifier sets, Inverters, Batteries etc. shall be procured
as per approved specifications.

(b) Battery chargers for axle counters shall have in-built filters to maintain
ripple content below specified value.

(c) Standby power equipment such as battery chargers, transformers, Voltage
regulators, Transformer-rectifier sets etc. may be provided.

(d) Secondary cells of prescribed capacities shall be provided for DC circuits.
DC-DC converters of approved type with isolated outputs may be used to
obtain different voltages from a common Battery bank.

(e) Integrated power supply system of approved type shall be used at CLS
installations.

(f) Maintenance free cells wherever provided, shall be used only with charger
suitable for charging maintenance free cells as per approved specification.

Chapter 16: Power Supply Systems for Signalling Installations Page 325 of 535