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High-rise building fire hydrant and sprinkler system, electrical design should pay attention to several issues


50261-96 in the requirements of Article 7.2.5.1: signal, the pressure switch should be connected to the circuit alarm, fire pump should start well. Pressure switch in the fire, the fire control room alarm should have to start from the jet pump well while fighting two functions. But some designers yet Indirect pressure switch designed to start from the jet pump, namely: the pressure switch signal line connected to the fire control room all the linkage console (pressure switch used in the DC 24V power oar is designed to be fire alarm system units use), then another joint control head cutting units, in , you need to fire control room staff on duty on the console and then press the linkage from the jet pump dedicated button). This design wiring, making the pressure switch is actually in a question then start to run from the spray pump form, spirit and specification requirements does not match the correct approach is: spray pump power in the cabinet since set up a dedicated 24V relay and 24V DC rectifier circuit, the pressure switch for direct start from the spray pump: to promote the progress designers button to start the fire hydrant fire hydrant at the pump and pressure switch to start the electrical signal from the jet pump are transferred one by the main fire control room nan is the original: the fire did not occur. If the consumer pumps a fat li 24 a special envoy to seek the fire off the shoulder stop moving crane. M r secret ambition to ridicule at r Sui. Site operators that may be a network jl from leaking if the song signal fire by the fire pump start switch to a control center. By the duty judge. To eliminate the malfunction blame for the prevention of anti-pipeline overpressure phenomenon may correct solution, yes: the fire control base-line safety valve set to prevent over-pressure device 'set this way: GB500'159j in 7-j. Had made clear requirements of r). Rather than extinguishing the fire pump starts when the signal received by direct transfer to ask to pass. 4 fire pump motor start-up mode of choice used in high-rise building fire pump motor power more each number t even hundreds of kilowatts kilowatts. And more for three-phase squirrel-cage induction motor of such motor although the price is low, but there is a large full-voltage starting current shortcomings, difficulties of this, the electrical fire pump to run during the design should be considered the negative impact of this shortcoming. Namely: high-rise building fire pump motor should try to avoid starting with full pressure. The buck should start using because if the use of barrier pressure to start. As the starting current will be too large,ralph lauren paris, resulting in the total building power distribution room power protection devices tripping (This phenomenon I had encountered in debugging the fire several times). If you start the fire pump in the event of a fire when this happens, the consequences can be imagined other, even in the commissioning and hand over the fire pump,abercrombie paris, the all-pressure way to start the pump started. Can not fully guarantee all pressure can occur when the fire started because of the fire protection system fire pump test and hand the word is not in the building to reach the peak electricity load. But its not yet fully put into use stage, but there may be fire in the building reached its peak when the electricity load. If the entire floor is too complex power distribution design load capacity is too small. Once the total pressure to start the fire pump, it will appear the total building power distribution room hip brake power protection devices, namely: the impact of fire fighting. Wuhan invested 2.8 million yuan perfect mall fire hardware Wuhan mall opened 40 years is a large shopping centers, fire facilities has lagged behind, in May 1997, May 1999, two municipal election under the major fire hazards caused by weapons suppliers to inform + = Group attaches great importance to the leadership in July last year,abercrombie france, the mall closed down vote determined the expansion transformation + 2.8 million yuan of the modern fire-fighting system complete hardware facilities: installed ZA4351MA microprocessor-based controller and supporting general fire alarm system control center, including smoke Probe 531 ten, ten and 60 manual alarm Lin water spray head 2168; repair the fire control network pressure system,christian louboutin pas cher, automatic fire alarm system and fire control center linkage; escalators on each floor, in the courts, according to the vertical opening part of the rules new regulatory requirements to do the fire door 63 door frames: the original with the combustible part of the decoration have been removed, well decorated using flame retardant materials B1 level, the implementation of fire separation; all fruit and flame-retardant wire sets are doing; replace ABC dry fire extinguisher 325 + effectively eliminate the fire hazard, the hardware selected to r fire safety requirements.
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