【 Weak current college 】 building fire power and fire power supply system of fire safety check

Fire power supply and distribution systems directly to building all fire-fighting equipment running power, its reliability is directly related to the building's fire safety facilities in fire situations, the ability to function properly. Fire inspection should attach great importance to the content of the check.

In the past in the fire building audit, inspection and ongoing supervision and inspection, fire supervision officers often neglect to fire for distribution system design, construction and management of the authority, together with the construction of fire service management are not in place, resulting in a fire, often occur due to fire, power supply and distribution system fault led to fire-fighting facilities losing momentum, unable to play.

Because no fire power, fire fire source unable to start, leaving the scene of the lack of water, not fighting fires, because no fire power, causing fire partition fire shutter and fire door could not be in place to control the spread of the fire; the fire because of no power, no smoke, fire elevator cannot work, evacuation instructions are not emergency lighting can help secondary smoke evacuation, stairways, cannot smoke fire evacuation of work can be done, cause serious disastrous consequences.

Because there is no reliable fire power, a significant investment in building fire facilities exist in name only in the fire, you cannot play any role, so that the fire caused heavy casualties and significant property damage. The number of typical cases of fire. So in the fire safety inspection and found the unit building site fire power connection problems, resulting in a fire after the blackout facilities not properly fire hazards, are a significant fire hazard. To timely issued the notice of a major fire hazard modification, seriously '.

The current building fire power and fire power supply problems in the system:

Supervision and inspection from fire and fire hazards throughout the building's ', fire power supply problems, can be summarized in the following aspects:

Power load rating and fire the required load, and so far, less than the required load level, such as some tall buildings and underground construction, particularly small and medium-sized cities of high-rise buildings.

In low-voltage power distribution unit, fire power distribution lines are not respectively in two low-voltage bus. Some units are equipped with two independent power house, meet level load requirements, but they will fire a distribution set is received at the bus terminal, so you cannot guarantee the reliability of fire power, fire distribution must be respectively, two circuit bus segment with out, and to fire-fighting appliances last level distribution box automatically switches on.

In fire distribution line non-fire load on access. According to the specification requirements, fire power distribution should start from the low-voltage distribution and other power distribution, and use of separate power supply circuit. Non-fire load failure will affect fire power.

Fire protection for fire protection distribution line is missing. This vulnerability is more prevalent. According to the provisions of the fire for distribution lines should be fire-resistant cables, or take the wear metal pipe laying in the non-burning body structure of fire protection measures. Two fire power cannot be the last level distribution box office automatic switching. This will fire pumps, fire elevators, ventilator, smoke fire shutter key fire safety equipment and reliable operation in a big danger. -Fire power generators cannot on its own startup, unable to keep the fire power transmission and distribution lines, power supply for fire-fighting equipment.

Fire power distribution unit in the fire protection design potential exists on. For example: power distribution, and other parts of the lack of fire-retardant partition, power distribution unit is not installed fire door, ventilation ducts passing through distribution room partition does not install the fire damper, distribution, and fire control rooms, without direct telephone distribution room lighting illumination is not enough.

Large buildings in fire power and fire for the potential dangers of distribution systems, often is history, in the design and construction of a hidden danger; some because building change use feature increases the load on the power level but, in either case, is a significant fire hazard. These hidden rectification of investment is larger, the difficulty is also very strong, especially such a hidden danger in the usually subtle, to the risk of discovery and rectification of great difficulty. Our fire monitors to be given the attention they deserve.

In fire inspection how to check the fire power and fire for power distribution system

On large buildings and public gathering places for the supervision and inspection of fire protection, fire-fighting power and fire power supply system is important to check the content of some inspectors on electrical knowledge is limited, so do not have the confidence to carry out the checks, which can not be timely discovery of this vulnerability. With the development of urban construction, large buildings, high-rise buildings of the dramatic increase in the number of fire power of hidden problems more and more, supervision and inspection in the future, we must make efforts to check content.

Then in the current fire inspection process we should how to check the content, the content of the various checks below to give us some ideas.

First of all, according to the requirements of the building, place for fire electricity load level, to check the power distribution unit introductions are qualified. For example, fire level load requirements common power and fire standby power supply from two different primary substation with dual power supplies. Many buildings and places of fire power supply failed to meet the fire load level, some units cannot solve the problem of double-circuit power, prepared the generator as fire standby power. In fact, this does not meet the requirements of the fire power, which itself was a major fire hazards, many comrades that situation not caused due diligence. Fire-fighting equipment distribution box should be distinguished from other distribution box for obvious signs of different fire-fighting equipment should clearly distinguish between the distribution box. Distribution box on instruments, knowledge, and other display normal, switch and British control button should be flexible and reliable. In distribution, check whether the two way power supply respectively in two low-voltage bus; the substation watch led spot check recognition.

CheckCheck the switch standby power of control mode and operating rules for conformance to specifications. For example check fire pumps with electric power can switch automatically, automatic control methods, running water pump power manually cut off, standby power is immediately and automatically switch, the led is the immediate reaction to ensure the normal operation of the fire pump. Or manually cut fire control room is the normal operation of the automatic alarm systems, see standby power is guaranteed to automatic warning system up and running.

Check fire-resistant protection for power distribution lines. Check line laying of fire prevention measures are consistent with the normative provisions, there is no temporary connection. Fire power line pipe, block, wear-resistant protective measures are intact and valid. Check the wires and cables, insulated grounding resistance properties, and so meets specification requirements.

Check fire for distribution line on whether access non-fire electricity load. This vulnerability is widespread. Some later access load, for convenience, access the fire power supply line, when problems arise, will allow the fire standby power supply problems, or even failure, this will seriously endanger the fire standby power supply reliability and validity, belongs to a major fire hazard. Check the self-powered generator, to check the unit nameplates, instruments, led the charge normal buttons, and so on are intact;

Whether in their own start after power failure, to on-site testing; if it does not start automatically, how to start, and field testing. Check the test since the start automatically after power-off time is guaranteed to complete within 30 seconds, and check the generator running and output power, voltage, frequency and phase displays correctly, test time should not exceed 10 minutes.

Check the various measures, such as fuel quantity (3-8 hours with oil), quality is qualified, manual operation, is responsible for starting the implementation of responsibility, time on how to ensure the job. Check the generator room ventilation is intact and valid.

Check fire distribution room door is a class a fire door, cross the fire distribution room ventilation piping is installed on the fire damper, fire power distribution unit and fire control rooms have direct telephone, how to contact and work together, there is no linkage between operating rules and emergency action plan. Units should periodically check the test fire power results recorded, on fire supervision inspection provides relevant information.

Building effective fire fighting power of intact, it is necessary to ensure the building fire safety is an important aspect, fire supervision personnel to constantly explore check method, accumulated experience, discover the rectification of fire hazards, to ensure that these large buildings and public gathering places for fire safety.