【 Weak current College 】 emergency lighting design---Power By 【 China power house network 】

Emergency lighting is to interrupt the normal lighting by accident and setting of lighting. Emergency lighting is directly related to indoor physical security and safe operation of critical equipment. Emergency lighting by function is divided into: alternate lighting, security lighting and evacuation lighting. Alternate lighting is the normal lighting outage in order to ensure the continued work and setting of illumination; safety lighting is the normal lighting outage in order to ensure that the potentially dangerous to the safety of personnel in the provision of lighting; evacuation lighting to enable personnel in emergency situations to be safe evacuation. Emergency lighting is divided into fire emergency lighting and emergency lighting in non-fire. If the building design fire protection standard (GBJ16-87) emergency lighting is called fire lighting and evacuation instructions; the fire safety design of tall building norms (GB50045-95) and the automatic fire alarm system design code (GB50116 — 98) emergency lighting is called fire emergency lighting and evacuation instructions. Design and construction of the different functions of emergency lighting have different requirements. ±¾ìû × îºóóé sources--cost new home Forum (1) emergency lighting installation site: evacuation lighting, evacuation instructions to install the crowd evacuation routes, namely corridors, staircases and corner; alternate lighting installation in fire control rooms, electrical rooms, fire power equipment room, computer room, and other important communications equipment room and staff-intensive sites; security lighting more installed in major shopping malls, banks, Business Office, hospitals, operating rooms, first aid room and dangerous place to work. (2) emergency lighting of illuminance level: for continuing the work of alternate lighting of illumination is not less than the normal level of illumination, such as electrical room, fire control room, computer room or communication room; used to temporarily continue to work in an alternate lighting, illumination of not less than 10% of normal illumination ~ 50%, as in the dining room, Hall, Auditorium, personnel are crowded, security lighting: security lighting of normal intensity illumination of not less than 5% ~ 10%. Emergency power supply conversion time: alternate lighting, evacuation lighting power conversion time should not exceed 15s, (to use an alternate lighting conversion against theft of time within which should be in 1.5s); security lighting power conversion time should not exceed 0.5s (4) power supply: alternate lighting at least continue to work for more than a temporary work 8h alternate lighting shall ensure continued work 1h above; evacuation lighting and security lighting should guarantee continued to work for more than a height exceeding 20min 100m building should not be less than 30min (under the fire emergency lighting (GB17945-2000), standard emergency lighting of the working time of not less than 90min. Current construction electrical design for both types of emergency lighting in working time have made it clear that, but not consolidated). Safe lighting conversion time requirements do not exceed 0.5s, only the battery can meet this requirement. Safe lighting power of design in the use of lamps from the charged battery or EPS emergency power supply (EPS emergency power switch time up to 0.25s). Alternate lighting general use dual power switch, alternate lighting and evacuation lighting only some lamps with battery. (6) emergency lighting control method: in response to a fire emergency lighting, according to the operation mode is divided into ordinary light of persistent, if staff access stairs, front room, usually not lit in the fire lit in the non-persistent, and the combination of both. Should pay particular attention to the usual light of persistent emergency lighting installation, design often single with dual-control switch in-place control. Here's one with a double control switch is not in the two offices control lamp, but the normal lighting and emergency lighting conversion function, that is, no matter where the contact switch, emergency lights are always off. 2 emergency lighting installation ±¾ìû × sources--cost new home Forum wires, cables and protective tube of the construction electrical engineering construction quality approval standard (GB50303 — 2005, hereinafter referred to as the "acceptance") require evacuation lighting should be laying of fire wires, cables, wires and a rated voltage equal to or higher than the copper conductor insulated wire 750V (20.1.4.8). The acceptance of "no alternate lighting, security lighting line laying of fire wire, cable (flame-resistant electric wires, cables and wires, cables, are two different technical standards of products, the two cannot be confused with). Flame-retardant and the fire-wire, cable allows the long-term work of the highest rated temperature must meet the design requirements, it must be as designed before acceptance. Fire emergency lighting conductor cross section should be appropriate to relax. Emergency evacuation lighting circuit protection tube regardless of the downlead or concealed in the acceptance of law requires the use of steel tubes, and other emergency lighting circuit protection tube material and dynasty. The specifications for the design of tall building (GB50045-95), the architectural design fire protection standard (GBJ16 — 87) requires that, when a fire emergency lighting distribution lines when the downlead should adopt the metal pipe, and use of fire protection measures; concealed, only requires protection layer thickness not less than 30 mm, the description of the pipe. When the use of plastic pipe concealed should use nonflammable material and plastic pipe of oxygen index should be more than 27. Without design, embedded inside a wall or concrete pipe should be medium or catheter (the acceptance of 14.2.9.3); building ceiling must adopt the metal pipe laying, metal pipe wall thickness 1.6mm candidates that more hot-dip galvanizing. (2) emergency lighting line laying emergency lighting lines separate laying of fire, each partition has a separate emergency lighting circuit, can not be mixed with General lighting line. Through the various fire sections of line should have the fire trap blocking measures. (Fire prevention across specific practices see blocking standard Atlas of the steel conduit wiring installation (03D301 — 3) page 38). When the fire emergency lighting line of power and standby power in the same tray, intermediate plus installation. Downlead pipeline, steel tube is coated fireproof paint protection. Line pipes, flutes PE protective line connection is completed, check the confirmation to Threading. Not into the ceiling, the tubes of the frame and junction box fixed in the main, Deputy keel; into the ceiling, electrical fittings should be laying in the main joist. In the wire and cable insulation, electrical conductivity and fire performance object, press the number of samples to send qualified laboratory testing. Complete wire splicingTo test a wire insulation resistance. Emergency lighting lines cannot and other general lighting line mix. Emergency lighting distribution box installation process with the General lighting distribution box installation process, but emergency lighting distribution boxes and other general lighting distribution box there should be clear to distinguish between flags. Emergency lighting distribution box structure and electrical components use fire-resistant and heat-resistant type, when using ordinary power distribution box, the installation location should as far as possible avoid the impact of fire-prone areas. EPS power supply cabinet installed in electric shaft, power Cabinet should be left around thermal channel. EPS output neutral line N should be building is directly connected to the grounding. EPS power supply Cabinet outlet side of the low-voltage circuit breaker should use 4-pole switch; branch breaker selected bipolar switch. (4) emergency lighting and install security lighting, alternate lighting and evacuation lighting available ordinary energy-saving lamps, fluorescent lamps (with electronic ballast). Evacuation signage lights must be in the fire service certification products. Lighting installation parts General in the aisle and stairs around the corner. Evacuation signs arrow should point to the direction to the exit. Lighting installation height by design. If not provided, the General evacuation exit signs installed at the top of the exit, on the edge 0.2m from ceiling shall be equal to or greater than 0.5m. If the height of the ceiling is low, or evacuation doors on both sides of the flag is set on the wall of the dots in the height of the Centre ground should be 1.3 ~ 1.5m. Used boom of evacuation signs the bottom edge of the height from the ground shall be greater than or equal to 2m. Evacuation signs installed at the staircase, the evacuation of the aisle and corner 1m following wall (corner additional a flag). Logo should not be greater than the spacing 20m, bag-shaped walkways at the end of the distance from the sign should be less than or equal to 10m. Closed stair staircase, smoke and fire front room, Elevator, room should also be installed before the evacuation signs. Evacuation aisles with self-luminous ground evacuation marker lamp installation as described in the standard installation of the Atlas of the special lamps (03D702-3). Evacuation routes should be simple and straightforward. Evacuation signs lamp applications not burning material lamp housing cover, the arrow points to the flag should be consistent with the direction of exit to evacuate. All metal components are installed should be treated with preservatives. You cannot use the evacuation signs instead of evacuation signage lights. Standby power to check the double power supply phase sequence. Standby power supply or emergency lighting power supply for unloaded automatically removed before the test load, no-load test qualified automatically, do load test automatically. Lamps and insulation resistance should not be greater than or equal to 2 M Ω; switch insulation resistance should be greater than or equal to 5 M Ω; lighting, wiring insulation resistance test, lamps and accessible exposed conductor PE connection complete protection line, the inspection qualified, to power on tests; lighting power continuous commissioning time should not be less than 8h; fire lighting into fire control, manual or automatic testing of fire lighting and evacuation instructions.