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2019 first-class fire engineers high-frequency examination point summary threeinvolved in the examination point: ventilation, air conditioning system fire and explosion prevention
考点解读
1, A, B production plant in the air should not be recycled, in order to prevent the discharged combustible substances containing Air re-entry into the plant, increasing the fire hazard. Type C production plant air, such as containing combustion or explosion risk of dust, fiber (such as cotton, wool, linen, etc.), easy to cause the rapid spread of fire, should be set up before the ventilator dust filter to purify the air, and should be made to make the air dust concentration is lower than 25% of the lower limit of the explosion, and then recycled.
2, A, B production plant with air supply and exhaust equipment should not be arranged in the same ventilator room, and its exhaust equipment should not be arranged with other rooms of the air supply and exhaust equipment together.
3, ventilation and air conditioning system piping arrangement, horizontal should be set according to the fire partition, vertical should not be more than 5 floors, in order to constitute a complete building fire prevention system to prevent and control the fire spread horizontally and vertically. When the pipeline in the fire separation set to prevent backflow facilities or fire damper, and high-rise buildings are equipped with automatic sprinkler system on all floors, can effectively control the spread of fire, the pipeline arrangement may not be subject to this restriction. Through the floor of the vertical duct requirements in the tube well, common measures to prevent reflux are as follows.
1) Increase the height of the vertical exhaust pipe on each floor, so that the exhaust pipe on each floor through the two floor slabs;
2) the exhaust pipe through the roof, the small exhaust pipe in layers and the total vertical connectivity;
3) the exhaust pipe in the direction of the airflow into the vertical duct, and the branch to the branch outlet height of not less than 600mm;
4) in the branch on the pipe Installation of check valves.
4, the plant has an explosion risk of the place of exhaust ducts, it is strictly prohibited to pass through the firewall and explosion risk room partition walls and other fire separators.
5, civil buildings to store fire-prone or explosive substances in the room (such as easy to release flammable gases hydrogen battery room, Class A liquids, small spare parts, movie rooms, chemical laboratories, laboratories, flammable chemicals library, etc.), set up the exhaust equipment should be used in an independent exhaust system, and its air should not be recycled, in order to prevent the spread of flammable and explosive substances or the occurrence of fires through the The air should not be circulated to prevent flammable and explosive substances or fire from spreading to other rooms through the air ducts. In addition, the gas discharged from its exhaust system should lead to a safe place for relief.
6, the exclusion of combustible gases containing lighter than air and air mixtures, its exhaust duct should be laid in the direction of the air flow upward slope to prevent the formation of high concentration of gas in the pipeline in the formation of localized accumulation of explosive hazards.
7, the location of the exhaust vent should be set according to the combustible gases, vapors, different densities and make a difference. Lighter than air, should be located at the top of the room; heavier than air, should be located in the lower part of the room, in order to facilitate the timely discharge of flammable and explosive gases. The location of the air inlet should be arranged in the upwind direction, and as far away as possible from the exhaust port to ensure that the suction of fresh air no longer contains flammable and explosive gases or substances discharged from the room.
8, combustible gas piping and A, B, C liquid piping should not pass through the ventilation ducts and ventilator room, and should not be laid along the outer wall of the ventilation ducts.
9, containing combustion and explosion risk of dust air, before entering the exhaust fan should be used to purify the dust collector does not produce sparks.
10, dealing with explosion-hazardous dust exhaust fan, dust collector should be set up separately from other general fan, dust collector, and should be arranged in groups according to a single dust, this is because different properties of dust in a system, easy to fire and explosion accidents. For example, sulfur yellow and lead peroxide, chlorate mixture can explode; carbon black mixed with oxidizers will reduce the spontaneous combustion point.
11, purification of explosion-hazardous dust dry dust collector and filter, it is appropriate to be arranged in a separate building outside the plant, and the fire distance from the plant should not be less than 10 m. Meet one of the following conditions of the dry dust collector and filter, can be arranged in a separate room of the plant, but should be used to fire-resistant limit of not less than 3.00h of the partitions and 1.50h of the floor with other parts of the partition. Part of the separation.
1) Continuous dust cleaning equipment.
2) Dust collector and filter with air volume not exceeding 15000m3/h and dust storage capacity of dust collection hopper less than 60kg with regular dust removal.
12, dust collectors, filters and pipelines containing dust and debris with explosive hazards should be equipped with pressure relief devices. Purification of dust with explosion risk of dry dust collector and filter, should be arranged in the negative pressure section of the system to avoid its leakage in the positive pressure section and cause accidents.
13, A, B, C class production plant supply and exhaust ducts should be set up in layers to prevent the spread of fire from the fire layer through the pipeline to the neighboring layer spread. However, the horizontal or vertical air supply pipe into the plant is equipped with a fire damper, the horizontal or vertical air supply pipe can be combined with an air supply system.
14, excluding combustion, explosion hazardous gases, vapors and dust exhaust ducts should be easy to conductive metal piping, should be installed in the open should not be concealed, shall not be through other rooms, and should be directly to the outdoor safety, as far as possible, away from open flames and people through or stay in order to prevent pipeline leakage caused by the occurrence of accidents have a greater impact.
2019 First Class Fire Engineer High Frequency Examination Points IIInvolved in the examination point: evacuation stairwell
Examination Points Interpretation
I. Inspection content
1. Evacuation stairwell set up in the form of closed stairwells is separated by building component fittings, can prevent the Smoke and heat into the stairwell; smoke-proof stairwell is equipped with smoke-proof front room at the entrance to the stairwell, or with a balcony, alcove, etc., exclusively for the exhaust of smoke, and the door to the front room and the stairwell are B fire door stairwell; outdoor stairs can be used as an auxiliary smoke-proof staircase. Specific inspection requirements are:
2. The layout of the evacuation staircase
1) closed stairwell.
① Stairwells are arranged against the external wall and can direct natural lighting and natural ventilation. The first floor, such as aisles and foyers included in the stairwell to form an enlarged closed stairwell, should use Class B fire doors and other measures to separate from other aisles and rooms.
② In addition to the door of the stairwell, the stairwell does not open other door and window openings on the interior wall; stairwell wall with a fire-resistant limit of not less than 2.00h non-combustible body.
③ high-rise buildings, densely populated public **** building, densely populated multi-storey class C plant closed stairwell door for class B fire door, and open to the direction of evacuation; other buildings closed stairwell door can be used two-way spring door.
④ stairwell ceiling, wall and floor decoration materials must be used non-combustible materials.
2) smoke-proof stairwells.
① the first floor of the stairwell, such as aisles and foyers included in the stairwell chamber to form an enlarged smoke-proof anteroom, must use Class B fire doors and other measures and other aisles and rooms separated.
② smoke-proof stairwells should be provided in the anteroom, can be shared with the fire elevator room anteroom anteroom. The use of the anteroom area: public **** building not less than 6.0 square meters, residential buildings not less than 4.5 square meters; shared anteroom area: public **** building, high-rise factory and high-rise warehouses not less than 10.0 square meters, residential buildings not less than 6.0 square meters.
③ In addition to the door of the stairwell, the stairwell does not open other door and window openings on the inner wall; stairwell walls should be used fire-resistant limit of not less than 2.00h non-combustible body.
④ The door of the evacuation aisle to the front room and the door of the front room to the stairwell are Class B fire doors.
⑤ The decoration materials of the ceiling, wall and floor of the smoke-proof stairwell and front room must be non-combustible materials.
3) Outdoor staircase.
① outdoor stairs and each floor exit platform, the use of non-combustible materials, platform fire-resistant limit of not less than 1.0h.
② in the staircase around the 2.0m within the wall without other doors and windows openings, evacuation doors for B fire doors, and not squarely set up at the stage of the staircase.
③ Stairway fire resistance limit is not less than 0.25h, the minimum net width of the stairs is not less than 0.9m, the angle of inclination is not greater than 45 °, the height of the railing handrail is not less than 1.1m.
Inspection also need to pay attention to is used as an evacuation of the staircase shall not be used spiral staircase and fan-shaped step, such as the step up and down the two levels of the formation of the plane angle is not more than 10 °, each level from the handrail 25cm from the step. Handrail 25cm at the width of the tread more than 22cm can be used as an evacuation staircase; public **** building evacuation stairs between the two segments of the horizontal clearance shall not be less than 15cm.
3. The net width of the evacuation staircase more than public housing 1.1 (residential H ≤ 18m and one side of the railing, allowing 1) high medical 1.3 high public 1.2, factory garage 1.1
4. The safety of the evacuation staircase
Evacuation stairwells should not be set up in the boiling water room, combustible materials storage room, garbage tract; should not be affected by the evacuation of the protruding objects or other obstacles; should not be laid A, B, C class liquid pipeline. Closed stairwells, smoke-proof stairwells and their front rooms are prohibited to pass through or set up combustible gas piping, open stairwells should not be laid combustible gas piping, should not be set up natural gas metering meter, when the residential building must be set up such a facility, it should be used to cut off the source of the metal piping and set up the device and other protective measures.
Second, check the method
1) Along the stairs throughout the check the safety and smoothness. It should be noted that, in addition to the stairs leading to the refuge floor, the evacuation stairwells on all levels of the plane position should not be changed, it must be up and down through; when the basement or semi-basement and the ground floor *** with stairwells, in the first floor and the ground floor or semi-basement floor at the entrance, the fire-resistant limit of not less than 2.00h of the partition wall and the fire door of class B should be used to separate.
2) On the floor with the largest number of people in the design, select the relatively narrow place between the handrail of the evacuation staircase and the partition wall of the staircase to measure the net width of the evacuation staircase and verify the consistency with the fire design documents. Measuring points of each staircase not less than five, the width of the measured value of the allowable negative deviation shall not be greater than 5% of the specified value.
3) Measure the area of the front room, the measured value of the allowable negative deviation shall not be greater than 5% of the specified value.
4) Measurement of the width of the stairwell evacuation door, the permissible negative deviation of the measured value shall not be greater than 5% of the specified value.
2019 First Class Fire Engineer High Frequency Examination Points IIIEmergency lighting setup
1. Summary of setup places
1) Closed stairwells, smoke-proof stairwells and their anterior compartments, anterior or shared anterior compartments of fire elevator intervals, evacuation aisles, and evacuation floors (intervals). (Closed (smoke) point (electricity) money (before) difficult)
2) fire control room, fire pump room, self-contained generator room, power distribution room, smoke and smoke exhaust machine room and other rooms that still need to work properly in the event of a fire.
3) Auditorium, exhibition halls, multi-purpose halls and building area of >200m?business halls, restaurants, studios and other personnel-intensive places.
4) floor area & gt; 100m? of underground or semi-underground public **** activities, public **** building within the evacuation aisles.
5) densely populated production sites and evacuation aisles in the plant.
2. Setting requirements
1)Evacuation aisles ≥ 1.0lx;
2)Intensively populated places, refuge floors ≥ 3.0lx;
3)Ward building or surgical department of the refuge ≥ 10.0lx;
4)Stairwells, anterior or shared anterior rooms, refuge aisles ≥ 5.0lx;
5)for the crowded places, care facilities for the elderly, stairwells, anterior rooms or shared anterior rooms, and refuge walkways in ward buildings or operating departments 10.0lx;
6)Fire equipment rooms that still need to function normally in the event of a fire should not be illuminated below the normal illumination;
7)Fire lighting fixtures should be installed in the upper portion of the wall, on the ceiling, or at the top of the exits.
2019 First Class Fire Engineer High Frequency Examination Points IVI. Fire hazard determination
1. Fire hazard refers to the potential to have a direct cause of fire accidents may be, or when the fire can increase the harm to people, property, or affect the evacuation of people as well as fire fighting and rescue of all the insecurity factors. Fire hazards can be divided into general fire hazards and major fire hazards.
2. "Fire Supervision and Inspection Regulations" (Ministry of Public Security Decree No. 120) will have one of the following circumstances, identified as fire hazards:
1) affect the safe evacuation of people or fire rescue operations, can not be immediately corrected.
2) fire protection facilities are not kept intact and effective, affecting the function of fire prevention and fire fighting.
3) unauthorized changes in fire zoning, which can easily lead to the spread of fire, expansion.
4)In a crowded place in violation of fire safety regulations, the use, storage of flammable and explosive hazardous materials, can not be immediately corrected.
5) does not meet the city's fire safety layout requirements, affecting the public **** safety.
6) Other situations that may increase the substantial risk of fire or hazardous.
3. Significant fire hazards refers to the violation of fire laws and regulations, does not meet the fire safety technical standards, may lead to fire or fire hazards to expand, and thus may cause major, especially major fire accidents or serious social impact of various types of potential insecurity.
4. Major fire hazard determination method is divided into direct determination and comprehensive determination of two kinds, direct determination of the elements and comprehensive determination of the elements can not be immediately corrected fire hazard elements.
5. The following cases are not judged as major fire hazards:
1) the fire design expert review in accordance with the law, and has taken appropriate technical measures.
2) units, premises have been shut down or stopped using.
3) not enough to cause a major, especially major fire accidents or serious social impact.
Second, the determination method
1. Meet any one of the direct determination of the elements, should be directly determined as a major fire hazard.
2. Does not meet the specifications of any one of the direct determination of the elements, should be a comprehensive determination.
3. Comprehensive determination method to determine the major fire hazards, should be carried out in accordance with the following steps:
1) Determine the type of building or place.
2) Determine whether the building or place of the circumstances and the number of comprehensive determination of the elements specified in the code.
3) The comprehensive determination of major fire hazards.
4) Exclude the circumstances that should not be determined as a major fire hazard.
4. Meet the following conditions should be comprehensively determined as a major fire hazard:
1) densely populated places there are major fire hazards in the determination of the elements of safety evacuation facilities and fire fighting and rescue conditions of the 1st to 9th, smoke and other smoke evacuation facilities and other provisions of the 3rd comprehensive determination of the elements of the 3 and 3 or more.
2) flammable, explosive hazardous materials places there are major fire hazards in the determination of the elements of the general layout of the 1 ~ 3, fire water supply and fire extinguishing facilities of the 5th and 6th provisions of the comprehensive determination of the elements of the 3 and 3 or more.
3) densely populated places, flammable and explosive hazardous materials places, important places where there are major fire hazards in any comprehensive determination of the elements of 4 and 4 or more.
4) other places where there are significant fire hazards in any comprehensive determination of the elements of 6 and 6 or more.
Third, the direct determination of the elements
1. Production, storage and handling of flammable and explosive hazardous materials, factories, warehouses and specialized stations, wharves, tanks, is not set on the edge of the city or relatively independent of the safety zone.
2. The production, storage and operation of flammable and explosive dangerous goods and crowded places, places of residence set in the same building, or crowded places, places of residence, fire separation is less than 75% of the value of the national engineering and construction fire safety technical standards.
3. The urban built-up area of the gas station, natural gas or liquefied petroleum gas filling station, gas filling station storage capacity to reach or exceed GB50156 on the provisions of the first-class station.
4. A, B production sites and warehouses set in the basement or semi-basement of the building.
5. Public **** entertainment venues, stores, underground crowded places with insufficient number of safety exits or their total net width is less than 80% of the value of the national engineering and construction fire technical standards.
6. Hotel, public **** entertainment venues, stores, underground crowded places are not in accordance with the provisions of the national engineering and construction fire safety technical standards for the setting of automatic sprinkler system or automatic fire alarm system.
7. Flammable combustible liquids, combustible gas storage tanks (areas) are not set up according to the provisions of the national engineering and construction fire safety technical standards for fixed fire extinguishing, cooling, combustible gas concentration alarm, fire alarm facilities.
8. In a crowded place in violation of fire safety regulations for the use, storage or sale of flammable and explosive hazardous materials.
9. Nursery schools, kindergartens, children's rooms and activities for the elderly, the location of the floor does not meet the provisions of the national engineering and construction fire safety technical standards.
10. Densely populated places of residence using color steel sandwich panels to build, and color steel sandwich panels core material combustion performance level lower than the GB8624 provisions of the A level.
Fourth, the comprehensive determination of the elements
1. General layout
1) not in accordance with the provisions of the national engineering and construction fire technical standards or the requirements of the city fire planning to set up fire lanes or fire lanes are blocked, occupied.
2) The existing fire separation between buildings is occupied or less than 80% of the prescribed value of the national engineering construction fire safety technical standards, open fire and emit sparks between the location and the flammable and explosive production plant, device equipment, fire safety spacing is less than the prescribed value of the national engineering construction fire safety technical standards.
3) set up staff quarters in factories, warehouses, shopping malls, or in residential and other civil buildings engaged in production, storage, business and other activities, and does not meet the provisions of GA703.
4) Setting up commercial business activities in the passenger evacuation area of the station hall, platforms and evacuation routes of underground stations.
2. Fire separation
1) the original fire partition is changed and lead to the actual fire partition of the building area is greater than 50% of the national engineering construction fire technical standards.
2) The number of fire doors, fire shutters and other fire separation facilities damaged is greater than 50% of the total number of corresponding fire separation facilities in the fire partition.
3) C, D, E class plant fire or explosion hazardous parts of the fire separation and other fire and explosion prevention technical measures have not been taken.
3. Safety evacuation
1) the building's refuge aisle, refuge room, refuge floor set up does not comply with the provisions of the national engineering and construction fire safety technical standards, or refuge aisle, refuge room, refuge floor is occupied
2) the evacuation of people in the building in the form of evacuation stairway set up does not comply with the provisions of the national engineering and construction fire safety technical standards
3) In addition to public **** entertainment venues, stores, underground people-intensive places other places or buildings, the number or width of the safety exit does not comply with the provisions of the national engineering and construction fire safety technical standards, or existing safety exits are blocked.
4) According to the provisions of the national engineering construction fire safety technical standards, the building should be set up independent safety exits or evacuation stairs but not set up.
5) The evacuation distance in the store business hall is greater than 125% of the value of the national engineering construction fire safety technical standards.
6) high-rise buildings and underground buildings are not set according to the provisions of the national engineering and construction fire safety technical standards for evacuation signs, emergency lighting, or set up the facilities of the damage rate is greater than the standard required to set the number of 30%; other buildings are not set according to the provisions of the national engineering and construction fire safety technical standards for evacuation signs, emergency lighting, or set up the facilities of the damage rate is greater than the standard required to set the number of 50%. Set the number of 50%.
7) with a crowded place of high-rise buildings, closed stairwells or smoke-proof stairwell door damage rate of more than 20% of the total number of its set up, other buildings closed stairwells or smoke-proof stairwell door damage rate is greater than 50% of the total number of its set up.
8) the evacuation aisles, evacuation stairwells, front rooms in crowded places, the combustion performance of interior decoration materials do not meet the provisions of GB50222.
9) densely populated places of the evacuation aisles, stairwells, evacuation doors or safety exits set up fences, rolling doors.
10)The outer windows of the crowded places are blocked or covered by billboards and so on.
11)High-rise building fire lanes, rescue site set does not meet the requirements or occupied, affecting the fire fighting.
12) Fire elevators can not run normally.
4. Fire water supply
1)Not according to the provisions of the national engineering and construction fire technical standards for the setting of fire water, storage of foam and other fire extinguishing agents.
2) not set up according to the provisions of the national engineering and construction fire safety technical standards for outdoor fire water supply system, or has been set up but does not meet the standard provisions or can not be used properly.
3) not set up according to the provisions of the national engineering and construction fire safety technical standards for indoor fire hydrant system, or has been set up but does not meet the standard provisions or can not be used properly.
4) In addition to hotels, public **** entertainment venues, stores, underground crowded places, other places are not set up in accordance with the provisions of the national engineering and construction fire safety technical standards for automatic sprinkler systems.
5) not according to the provisions of the national engineering and construction fire safety technical standards set in addition to automatic sprinkler systems, other fixed fire extinguishing facilities.
6) has set up a sprinkler system or other fixed fire extinguishing facilities can not be normal use or operation.
5. Smoke control system
1) densely populated places, high-rise buildings and underground buildings are not set in accordance with the provisions of the national engineering and construction fire safety technical standards for smoke control, smoke evacuation facilities, or have been set up, but can not be used or run normally.
6. Fire power supply
1) fire electrical equipment power supply load level does not comply with the provisions of the national engineering and construction fire technical standards.
2) fire electrical equipment is not in accordance with the provisions of the national engineering and construction of fire technical standards for the use of dedicated power supply circuit.
3) not according to the provisions of the national engineering and construction fire safety technical standards set up automatic switching devices for fire fighting equipment end, or has been set up but does not meet the standard provisions or can not be normal automatic switching.
7. Automatic fire alarm system
1) In addition to hotels, public **** entertainment venues, stores, other underground crowded places other than the other places are not set up according to the provisions of the national engineering and construction of fire safety technical standards for automatic fire alarm system.
2) automatic fire alarm system does not operate normally.
3) smoke and exhaust systems, fire pumps and other automatic fire fighting facilities can not be normal linkage control.
8. Fire safety management
1)Social units are not set up in accordance with fire laws and regulations full-time fire department.
2) Fire control room operators are not licensed in accordance with the provisions of GB25506.
9. Other
1) production, storage of building fire resistance level of its production, storage of goods does not match the fire hazard category, in violation of the provisions of the national engineering and construction fire safety technical standards.
2) production, storage, loading and unloading and operation of flammable and explosive hazardous materials or dust explosion hazardous places are not set up in accordance with the provisions of the explosion-proof electrical equipment and pressure relief facilities, or explosion-proof electrical equipment and pressure relief facilities fail.
3) violation of national engineering and construction fire safety technical standards for the use of fuel, gas equipment, or fuel, gas pipeline laying and emergency shutdown devices do not meet the standard requirements.
4) violation of national engineering and construction fire safety technical standards in combustible materials or combustible components directly laying electrical wiring or installation of electrical equipment, or the use of fire distribution cables and other power supply and distribution cables do not meet the standard requirements.
5) Use of combustible and flammable materials for decoration and adornment in densely populated places in violation of the provisions of the national technical standards for fire protection in engineering construction.
2019 First Class Fire Engineer High Frequency Examination Point VPower supply and distribution system
First, the power supply load level
1. First class load power supply
1) Building height greater than 50m of class B, C plant and class C warehouse.
2) A class of high-rise civil buildings.
2. Secondary load power supply
1) outdoor fire water consumption greater than 30L / s plant (warehouse).
2) outdoor fire water consumption is greater than 35L / s combustible materials yard, combustible gas storage tanks (areas) and A, B liquid storage tanks (areas).
3) grain warehouses and grain silos.
4) Category II high-rise civil buildings.
5)Seating capacity of more than 1500 movie theaters, theaters, seating capacity of more than 3,000 stadiums, any one floor of the building area of more than 3,000 square meters of stores and exhibition buildings, provincial (municipal) level and above the broadcasting and television, telecommunications and finance and trade buildings, outdoor water consumption for fire fighting is greater than 25L / s of other public **** building.
3. In addition to the specification should be a primary or secondary load power supply, buildings, storage tanks (areas) and yards, etc., fire power can be powered by three loads.
Second, the power supply requirements
1. primary load power supply requirements
1) primary load power supply should be supplied by two power sources.
2) When a power supply failure, the other power supply should not be damaged at the same time.
3) primary load in the particularly important loads, in addition to the two power supply, should be added to the emergency power supply, and other loads are strictly prohibited to access the emergency power supply system. Emergency power supply can be independent of the normal power of the engine group, power supply network independent of the normal power of the dedicated feeder lines, storage batteries or dry batteries.
The following power supply methods can be considered as primary load supply:
1) Power supply from a regional substation with an additional self-contained generator set.
2) Power supply from two regional substations (voltage 35kV and above).
3) Power from two different power stations.
2. Requirements for power supply for secondary loads
1) The power supply system for secondary loads should adopt two circuits of power supply as far as possible.
2) In the smaller load or regional power supply conditions are more difficult, allowing a circuit above 6kV dedicated overhead line or cable power supply. When the use of overhead lines, can be a circuit overhead line power supply; when the cable line power supply, due to the cable failure recovery time and fault point investigation time is long, it should be used two cables composed of line power supply, and each cable should be able to withstand 100% of the secondary load.
3. Three loads of power supply
1) three fire electrical equipment using a dedicated single circuit power supply, and its power distribution equipment with a clear sign. Its distribution lines and control circuits should be divided in accordance with the fire partition.
4. Standby power requirements
1) fire back-up power usually have three kinds of power: independent of the working power of the charged circuit, diesel generators, emergency power supply (EPS).
2) diesel generator is a diesel engine and generator set together with the power generation equipment, the advantages of its unit operation is not affected by the operation of the city power grid, is the ideal independent and reliable power supply; unit power range from a few kilowatts to tens of kilowatts; unit operation is simple, easy to realize the automatic control; unit high efficiency, the oil quality is not high requirements. The disadvantage is that the work of the noise, overload capacity is small, to adapt to the start of the impact of the load capacity is poor.
3) Emergency power supply refers to the usual municipal power supply to the battery charging, utility power outages continue to use the battery power supply backup power supply device.
4) fire power supply according to one or two loads of the building, when the use of self-contained power generation equipment as a backup power, self-contained power generation equipment should be set up automatically and manually start the device. When the automatic start mode, should be able to ensure that the power supply within 30s.
Third, the wiring requirements
1. Fire electrical equipment should be used in a dedicated power supply circuit, when the building's production, living electricity is cut off, should still be able to ensure that the fire power.
2. Fire distribution trunk line should be divided by fire zoning, fire distribution branch line should not cross the fire zoning.
3. Fire distribution lines should meet the need for continuous power supply in case of fire, the laying of which should comply with the following provisions:
1) open laying (including laying in the ceiling), should be through the metal conduit or closed metal box protection, metal conduit or closed metal box should be taken to protect against fire; when the use of fire-retardant or fire-resistant cables and cable wells and ditches, may not wear a metal conduit or closed metal box protection. Metal conduit or closed metal groove box protection; when the use of mineral-insulated non-combustible cables, can be directly laid.
2) concealed, should be threaded and should be laid in the non-combustible structure and the thickness of the protective layer should not be less than 30mm.
3) fire distribution lines should be laid separately from other distribution lines in different cable wells, ditches; there is a need to be difficult to lay in the same cable wells, ditches, they should be arranged in the cable wells, ditches on either side, and the fire distribution lines should be used in the mineral-insulated class of non-combustible cables. Flammable cables.
Fourth, the power distribution design requirements
1. Fire pumps, sprinkler pumps, water curtain pumps and fire elevators should be directly from the substation or the main distribution room, the use of radial power supply; smoke and exhaust fans, fire shutters, and evacuation lighting can be used in a radial or trunk power supply. Fire pumps, smoke exhaust fans and fire elevators of the two low-voltage power supply should be able to automatically switch in the equipment room, the power supply of other fire-fighting equipment should be able to automatically switch in each fire partition distribution room; fire control room of the two low-voltage power supply should be able to automatically switch in the fire control room.
2. Fire pumps, smoke exhaust fans and positive pressure fan and other equipment can not be used as a frequency converter control device. Motor type fire fighting equipment can not be used EPS / UPS as a backup power supply.
3. Main fire pumps for motor pumps, standby fire pumps for diesel pumps, the main fire pumps can be used all the way to power supply. Fire equipment distribution box and control box should be installed in the distribution room, fire equipment room, distribution room or electrical shaft; when must be installed in other places, the box to take fire prevention measures, and to meet the requirements of the fire equipment in the event of a fire continuous operation time.
4. Fire load distribution lines set up by the protection of electrical short-circuit protection, but it is not appropriate to set up overload protection, such as setting up only action in the alarm and can not be used to cut off the fire power supply.
5. Fire load distribution lines can not be set up residual current action protection and over- and under-voltage protection.
6. Fire fighting equipment and non-fire fighting equipment distribution devices should be installed separately; if you have to be installed side by side, the demarcation should be set at the fire partition. Fire distribution equipment should be equipped with obvious signs, special fire distribution cabinet should be red cabinet.
V. Other requirements
1. Fire control room, fire pump room, smoke and smoke exhaust fan room fire electrical equipment and fire elevators and other power supply, should be in the distribution line at the end of the last level of the distribution box set up automatic switching device.
2. According to one or two loads of fire-fighting equipment, its distribution box should be set up independently; according to three loads of fire-fighting equipment, its distribution box should be set up independently. Fire distribution equipment should be set up obvious signs.