Emergency backup power

The power for combustible gas detection system should be supplied from the facility s UPS or if this is unavailable normal power with a reliable battery backup source of a minimum of 30 minute duration. 

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A central location where instmment leads are short is preferred. In modem faciHties with distributed control systems, all units are controUed from a central control room with few operators. Only a few roving operators are available to spot trouble. It is desirable to deep process equipment a minimum of 8 m away from the control room. Any equipment and hydrocarbon-containing equipment should be separated by at least 15 m if possible. Most control rooms are designed with blastproof constmction and have emergency backup power and air conditioning. The room is pressuri2ed to prevent infusion of outside air that may have hydrocarbon content in the explosive range. 

Other Recirculation or exhaust air from chemical areas is prohibited. No connection between chemical areas and other areas through ventilation system is permitted. Emergency backup power is necessary. Hoods should be tested at least semiannually or after modification or maintenance operations. Operations should be performed 20 centimeters inside hood face. 

Hordeski, Michael F., Emergency Backup Power Sources, The Fairmont Press , Lilburn, GA, 2004. 

Commercial power disrupted and TOCDF changed to emergency backup power. ACAMS alarmed in the DFS due to the interruption of the airflow. As a precaution TOCDF suspended munition processing and RTAPS deployed with negative readings. Demil process resumed after commercial power restored. 

The pocket electrodes have a strong structure and are excellent in durability and the manufacturing cost thereof is low, and therefore, the pocket electrodes have been used for miner lamps, railway vehicles, emergency backup power, etc. for a long time. 

Reactors are designed to be inherently safe based on physical principles, supplemented by redundant equipment and special procedures. Nuclear power benefits from the appHcation of the concept of defense in depth, ie, by using fuel form, reactor vessel, building containment, and emergency backup procedures to ensure safety. 

The emerging overunity electrical power systems—including self-powered systems freely taking all their energy from the local vacuum—will produce a total revolution in transportation, electrical power systems, backup power systems, and so on [68,69]. In the process, the electrical power is obtained freely and cleanly from the vacuum, from permanent-magnet dipoles continuously replenished from the active vacuum via the giant negentropy process. 

Alternate Control Centers. Recognizing the unpredictable nature of a developing emergency, it is advisable to select at least one alternate on-site main control center. Both the MECC and the alternate on-site center should have backup power supplies. 

Emergency Event An emergency event would generally be considered an abnormal shutdown accompanied by loss of one or more control systems, coolant supply systems, or emergency backup systems An example would be complete loss of A power, fiwjcompanied by failure of the l8U- boilers. 

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... 

D. EMERGENCY POWER SUPPLY SYSTEM [rather backup power supply]... 

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