Lighting emergency power supply

Extent of emergency power supplies for lighting, communication systems, and key items of equipment (e.g. cooling facilities, reactor agitators, exhaust ventilation) and instruments/alarms. 

The latter batteries are used for such different applications as in consumer elee-tronics, in vehicles for starting, lighting, and ignition (SLI) and for traction, as emergency power supplies, in load-leveling systems of electric power stations to supply peak demand, and as systems to couple with alternative energy sources. 

Escape routes, staircases, and railings shall also be provided at appropriate places. Alternate lights in plant shall be given supply from alternate power feeders. This wiU prevent total darkness in the plant in case of power failure of one feeder. There shall be easy approach to diesel/gas generator sets for the supply of power in case of need (for emergency power supply) when grid power fails. However, these sets shall start automatically whenever grid power supply fails. 

Diesel generator (DG) sets for emergency power supply Required for APC, lighting, instruments, HCl absorbers, CI2 liquefaction Safety and environmental issues DG set shall switch on automatically if grid power fails... 

The most important market remains the car battery for starting, lighting and ignition (SLI), with approximately 50 x 10 units per year being sold in the USA. Lead/acid batteries are, however, also used on a very large scale for traction (e.g. delivery vans, milk floats, fork-lift trucks, industrial trucks — there are more than 100 000 such vehicles in the UK) and for stationary back-up or emergency power supplies. More recently, small lead/acid cells to compete with high-quality primary cells and nickel/cadmium cells for instruments, radios, etc., have also become available. 

Cost, dollars per cell General types Communication, utility, emergency lighting, uninterrupted power supplies 100 5000... 

Nickel-cadmium batteries are used for special emergency power supplies, as required in medical centres, intensive care units and operating theatres and similar applications where lighting interniption can be a matter of life or death. 

Train lighting batteries are installed in containers below the carriages and supply the coach lights during steps at stations or in the case of a power supply failure. Nickel-cadmium cells are also used for the uninterrupted emergency power supply to railway main stations and signalling systems. 

There is no standby electrical power supply to the building, although it is equipped with battery powered emergency lights. A mechanical equipment room in the east end of B6591 contains a boiler and air compressor that provide hot water and compressed air, respectively, to B6597. 

For example, from a safety perspective someone needs to compute the water supply requirements for fire protection and other uses. Someone needs to identify which spaces or operations need emergency lighting or power. A safety specialist may need to conduct a preliminary hazard analysis or other analysis for some or all operations or spaces. The results will give the design team information to incorporate into the design. 

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