Emergency Lighting - substation

 

            Emergency Lighting

 

-         Emergency lighting shall be supplied from the DC distribution board in case of AC supply failure.

-         An emergency lighting system shall be automatically supplied in the event of:

·        AC supply failure of substation's main  AC.

·        AC supply failure of main Lighting board.

·        Lighting's miniature circuit breaker failure for any one of the lighting circuits.

-         Emergency lighting should be installed in all the substation rooms, switchyard, main roads, access roads, guard room and main gate and operated as follows:.

ØEmergency outdoor lighting the system shall be manually operated.

ØEmergency indoor lighting the system shall be:

    Directly operated automatically in the following mentioned areas:

·        control room

·        PLC room

·        11/ 22 KV hall

·        AC / DC room

·        Corridors and entrance 

·        66 KV switchgear building (in indoor s/s)

   Manually operated  by means of DC switches which shall be installed in the following places:

·        Offices

·        Workshop / store

·        Kitchen / WC

·        Auxiliaries trnsformers rooms

·        Fire fighting room

·        Battery room /  Rectifier room .

-         Emergency lighting shall be designed to give lux level not less than 5% of the normal lighting lux level with minimum level of 10 lux.

-         Only incandescent lamps with a porcelain holders are allowed to be used.

-         Emergency exit signs are required at all exist and along escape routes.

-         The control room is also to be fitted with a portable emergency lantern which will automatically light a pilot lamp in the event of an A.C power failure.

-         Light fittings are to be provided at all exit door and along catwalk (switchgear building).