Applications emergency lighting systems

Another important area of application is the use of small power units as backup power in situations of sudden loss of grid power because of natural or technical problems. Such backup units are extremely important to those consumers who cannot tolerate power interruptions. This is the case for various stationary telecommunications installations (for instance, receivers, transmitters, relay stations, signal amplifiers). Ofher users who can use unifs of fhis fype are surgery wards in hospitals, computer units in traffic control, financial insfifufions, and emergency lighting systems in public... 

The nickel-cadmium battery is also used in power-generating stations and power distribution networks where power supplies must not break down. The batteries are used in switch-gear applications and for control and monitoring functions. In centralized emergency lighting systems in hospitals, public buildings, sports arenas, and schools, nickel-cadmium batteries are often specified in building codes and by consultants in many industrialized countries. 

Small-format lead-acid batteries with immobilized electrolyte are still used in some applications such as hand lanterns. Low-cost six or twelve-volt batteries (e.g. 6 Ah size) are used in child-driven toy cars and other sizes in emergency-light or alarm systems, kept on trickle-charge. Efforts are being made to produce bipolar systems which give 30 percent improvements. 

Portable valve-regulated lead-acid cells can operate in any orientation without acid leakage and find use in many different applications, such as in electronic cash registers, alarm systems, emergency lighting unit equipment, telephone boxes, switching stations, minicomputers and terminals, electronically controlled petrol pumps, cordless television sets and portable instruments and tools. 

Iron-nickel oxide batteries have been used for many years in railway lighting applications, and for motive power in industrial trucks, tractors and mine locomotives. There is some utilization of the system in emergency lighting and alarm circuits. 

The batteries used for the emergency supply should be suitable for this purpose. Motor vehicle batteries are not suitable for emergency lighting applications, except in the starter system of motor-driven generators. The fuel supply to a... 

Marine applications require an uninterruptible power supply to the emergency systems for radar, communications, steering and navigation, and for the emergency lighting on board. 

The most reliable type of battery for engine starting is the Plants high-performance type. The standby engine is, of course, required for many emergency applications where maximum reliability is essential. These applications include emergency lighting sprinkler systems, industrial processes, telecommunications, and any auxiliary power requirements. 

The application of chemiluminescence as a light source is most successful when a particular requirement is met such as freedom from heat or ignition. Such uses are as an emergency light, for signalling and marking, in special display devices, and in indicator systems involving oxidants. 

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