【 Weak current College 】 talk fire emergency lighting system and the power of choice---Power By 【 China power house network 】

As China's urban modernization and new Socialist countryside construction of deepened, new buildings sprang the proliferation of different variety, style, becoming a symbol of urban construction and beautiful scenery, the height of modern buildings, a building area of larger and larger, integrated functionality more and more, entire, internal facilities more and more, more and more internal decoration material, more and more new. However, to the building fire safety management brings new challenges and new issues, building fire load increases, the effect of fire "chimney" enhanced security evacuation channels is more complex. Building fire implementation requirements are higher, if routine mismanagement, in the event of fire and explosion, it is easy to result group dead injury accidents. Fire facilities including indoor hydrant systems, automatic fire system, emergency broadcasting system, automatic alarm systems, emergency lighting, etc. Where emergency lighting system in building fire facilities indispensable part. If you lose the effect, in case of fire, evacuation of the building, easily lead to loss of life. Therefore, the requirements for a number of buildings (including underground part) should be uninterruptible power supplies, fire explosion or earthquakes and other disasters, normal power often fails or must be disconnected from power, then the normal lighting are off. In order to guarantee the safety of persons and property, and for the production, working time, effectively halt the spread of disaster or accident, you should immediately into the emergency lighting system. Following the fire emergency lighting and power supply on a few views:, classification of fire emergency lighting. Emergency lighting is the normal lighting system due to a failure or must cut off the normal power supply, no longer provide normal lighting, for evacuation or special posts continue to work in the lighting. It includes: an alternate lighting, evacuation lighting, fire lighting. 1. the selection of an alternate lighting. In normal lighting power failure occurs, to ensure normal activities continue and emergency lighting. Typically in the following areas should be set alternate lighting: (1) powered not timely operation or disposal can cause explosions, fires and poisoning incidents such as a place where paint production, petroleum chemical industry, plastic and its products production, certain operations. (2) powered not timely operation or disposal would result in the production process confusing or processing of precious part damage. If some process of chemical industry, metallurgy and other industrial furnace, metal melt casting, heat treatment and machining workshop of certain parts of the body. (3) lighting off will cause greater political influence or severe economic damage. As an important communication centre, radio stations, television stations, power plants, national and International Conference Center, hotel, international finance and trade important financial centres, transport hubs, important power supply station (heating, gas, oil) and water supply facilities. (4) lighting off will prevent fire and rescue work. Such as fire control room, the fire pump room, own generator room, the radio room and power distribution, etc. (5) important underground building lighting off will not work and activities. If a large underground subway station, shopping malls, restaurants, hotels, ground floor, ground floor, underground parking and underground entertainment, etc. 2 evacuation signage and lighting. In the event of a fire and explosion or other incidents, the normal power supply fails, the team can easily and accurately locate building safety outlet or exit and located in a building evacuation aisle and evacuation of the door top lights evacuation signs of emergency lighting, the following shall be set up: (1) the personnel-intensive public buildings. Such as Auditorium, large conference room, theatre, cinema, culture, sports stadiums, and large exhibition halls, museums, shopping malls, waiting rooms, lounges and the hospital ward building, etc. (2) hotel, hotel and other buildings. (3) senior public buildings. (4) public underground building. Such as subway stations, underground hotel, underground store, underground entertainment building. 3, fire lighting choices. In the event of fire, the normal power supply fails, the potential risk to ensure the safety of personnel in the part of the emergency lighting should be set in the building of closed stair staircase, smoke and fire front room, elevator room, fire control rooms, automatic generator room, the fire pump room, Auditorium, exhibition hall, Hall for the evacuation of the aisle and etc. Typically in the following areas should be set security lighting: (1), b, c class high-rise buildings. If the hospital ward building, shopping malls, hotels, restaurants, entertainment and television building, public places, etc. (2) for high-rise buildings, civil engineering, etc. (3) other persons gathered together, and are not familiar with environmental conditions, easy to cause panic and may cause personal injury. Emergency lighting is necessary to meet the General requirements for lighting, but also to meet the particular requirements of emergency action, both in emergency lighting, and the need to ensure permanent installation in building secure, reliable and in a good state of emergency. This in addition to choosing the right light source, the appropriate location, both for special circumstances to satisfy the needs of the evacuation, rescue, but also to ensure that incidents must hours of emergency lighting is not fire damaged. Therefore, should be installed in non-combustible material base and set of glass or other non-burning material. Choose a safe and reliable, durable, heavy-duty power supply is crucial. 2. fire emergency lighting power of option 1, the type of emergency lighting power. Fire emergency lighting power supply is no longer available when the normal power lighting State, the conversion to the emergency lighting power supply. Fire emergency lighting power can roughly be divided into the following types: (1) from the electricity network effectively with the normal power supply separate feeder lines. (2) diesel generator. (3) batteries: is divided into the following condition: ① lamp inside comes with battery that comes with power emergency lamp. ② set of batteries. ③ partition set set of batteries. ④ combination power: that is, by any of the above two or even three power combination power supply. 2. conversion time determination. Conversion time according to the actual project and related specification requirements. (1) standby lighting conversion time should not be greater than 15s; (2) emergency evacuation lighting conversion time should not be greater than 15s; (3) Fire lighting conversionTime should not be greater than 0.5s; 3, continuous lighting time determination. Usually require fire lighting and evacuation signs should not be continued working time is less than the height of more than 100 20min meters tall buildings and underground building continuous life not less than 30min. Alternate lighting of continuous working time appropriate to the specific requirements of using the site. 4. confirmation of the emergency lighting power. Emergency lighting power of choice to determine, according to the type of emergency lighting, the transition time, working hours, various power supplies feature and actual workplace requirements and other factors into consideration. ① from power grid and the normal feed circuit separated power supply this kind of power that has short conversion (conversion time easily meet the requirements of the various circumstances), continuing to work long, reliable features. So this is more common for power applications. For public buildings and factories, production and operational needs, when you have power standby power supply, should first use it for power for emergency lighting. To continue the production of alternate lighting and fire water pumping station, alternate lighting, and production of electrical equipment, fire pumps use the same backup power, the general strike from the power grid. ② diesel generator power for emergency generators, motor operation takes a long time, often in a reserve status of the generators, power failure since the start-up time takes approximately 15s, it can only do for evacuation lighting and alternate lighting of power, should not be separate for lighting a fire accident. In high-rise buildings are often required to meet fire protection requirements set generator. ③ battery power battery power can be divided into: lamp inside comes with batteries, centrally set of batteries, partition set setting of three types of batteries. Lamp with battery within the emergency light with power, the power supply reliability is high, the conversion quickly and decrease, line failure will not affect the impact surface of the battery are damaged. The disadvantage is that investment, continuous lighting time limit by size, day-to-day management and maintenance requirements. Number for emergency lighting, installation of a decentralized, small buildings. Concentrated or partition set set of battery power, the advantage is reliability is high, the conversion quickly and comes with battery mode less than investment, management and maintenance more convenient. The disadvantage is the need for specialized room, battery failure area, line laying to take fire prevention measures, such as the laying of distribution lines should wear protective tube, dark shop should be located in the non-burning body structure, the degree of protection layers should not be less than 3 cm, the shop must be wearing a metal pipe. This approach applies to the number of emergency lighting, lamps and focus more on the larger buildings. In important public buildings, important underground construction, sometimes with other types of emergency lighting power, so the more economic and reasonable. ④ combination power: that is, by any two or more power combination of power supply. For these several power structure and reliability are different, the system requirements and scope of application. So in practice only select a kind of emergency lighting power sometimes is difficult to meet the requirements, but also very difficult to achieve reliable, economical and reasonable. At this point it is necessary to select two or more emergency lighting power. In the actual construction engineering, emergency lighting power supply selection should be based on the floors of the building, the use of nature, architecture's daily stay and the number of mobile workers, and the extent of fire risk, and make a comparative technical-economic analysis, choose the optimal emergency lighting power.