The first question: Fire fighting rescue pump
is an important equipment,plays an extremely important role in fire fighting. According to our habit of thinking, all the important equipment should be set overload protection.
(3) provides that: "For more than a sudden power failure can cause loss due to overloading greater distribution lines, cut off the circuit should not be installed overload protection appliances (such as fire," as such provisions, the fire pump may overload. causing lines,loss of equipment and fire loss compared to negligible, but in practical engineering and even in some of the standard construction of Atlas,including the fire pump circuit as described in the current College textbooks still added the overload cut off electrical appliances, such as "building Electricity installation of high-rise building fire safety systems portfolio "JD13-318 page" full voltage to start the fire. "this obviously does not meet regulatory requirements.
The second question: the button and start the fire pump control loop pump lights should be below 50V safe voltage. Section 24.9.11 states:DC Fire linkage operating supply voltage should be used 24V.This is mainly at preventing the use of fire hydrants,water overflow and water make the fire box,gun charged firefighters hurt.But fire hydrant button in the actual construction and operation of the portion of the reference voltage is still connected to the power supply AC 220V,such as the aforementioned "Atlas" on the same page to commit such a mistake.
(2) start control.There are three places to the fire hydrant pump control start.
① According to "Building Regulations" and "design of tall buildings for fire protection" requirements,in the interior of the fire box directly start.
② According to the "automatic alarm standard" requirement,control of the fire control room.
③ in what way to start the pump. As soon as the fire-fighting equipment to work to reduce fire losses,taking into account the majority of non-fire when the fire load has been cut off,fire pump buttons.The hand pump is reported button to start the fire alarm linkage signal feedback to the controller,and then confirmed by the controller to start the fire pump.Moreover,this way instead of the automatic alarm system put forward higher requirements.At the moment, due to the automatic alarm system false alarm rate and operating costs and other issues, automatic alarm system,part of the building often ill run not even opened,it is difficult to play its due role.Therefore,we believe, or do not advocate newspaper by hand instead of the button to start the fire hydrant.
The third question: regular maintenance of fire pumps despite norms,rules and regulations explicitly require fire-fighting facilities and equipment should be regular maintenance,but there were fire pump control, fire pumps
regularly test run in standby,start automatically when the fire fighting and rescue,effectively put an end to the fire.