【 Weak current College 】 fire emergency lighting design problems of distribution---Power By 【 China power house network 】

As technology advances and socialization function needs, area of a single building, building height, aggregation of more and more, when building internal fire, causing serious injuries and increasing the risk of, and building a good emergency lighting (emergency lighting) system has a lot to do, so good emergency lighting system is a very important security facilities, is the building safety and timely evacuation of the premises, and to facilitate the rescue work smoothly, so as to minimize casualties and reduce the loss of people's property.
The so-called emergency lighting, refers to the normal lighting system in the very condition for ensuring the safety of evacuation, or continue to work with lighting. Including: alternate lighting, evacuation lighting, security lighting. For different types of building emergency lighting battery, illumination and control requirements are different. According to the specification requirements, building of emergency lighting, evacuation instructions lighting power belonging to the fire, shall be adopted according to the building level standard requires that the corresponding levels of supply. The emergency lighting power supply design, designers have followed the "civil construction electricity design specification JGJ/T16-92" the emergency lighting shall be composed of two way power supply, in important places or power supply condition does not have two power supply or when the two lines, you should set up a battery for emergency lighting or with a focus on battery; with battery for emergency lighting can be received from this layer (district), power strips, dedicated circuits, or disaster prevention dedicated power strips.
The "automatic fire alarm system design specifications" fire control device capabilities (6.3.1.8 bar): confirming fire control room in the event of fire, should be able to cut off the parts of the non-fire power and the power of fire emergency lighting is switched on. All of the emergency lighting lamps and lanterns are made of double control panel switch control, add a normal double power supply circuit, another way to add the power of fire intensity, strong cut cut power circuit set penumatic contactor, confirmed by the State in the fire, the fire auto-alarm linkage control devices connected to the power of fire intensity, so cut emergency lighting luminaires regardless of the State, are guaranteed to the emergency lighting, power distribution system as shown in the following figure:
I think this is the premise of an existing product comparative economic reasonable a distribution design, ensures the reliable operation of emergency lighting, and also the anti-theft security lighting system and reliable choice. Emergency lighting of double control panel switch with led to a clear State of emergency lighting luminaires and prompt action. In emergency lighting circuit set normally closed contact device, confirm that the status in the fire, the fire alarm linkage for emergency lighting power supply circuit, is in a floating charge status of emergency lighting, lamps and lost electric battery discharge automatically within lit, this scenario dual power boxes of non-fire-power loop excision may be appropriate, distribution system as shown in the following figure:
In a small place, this is a design that can be used, the deficiencies are not play dual supply reliability requirements, because life at least the bring 30min battery lamps, can satisfy the norms on fire emergency lighting battery requirements (the "civil construction electrical design specifications" section 24.7.5 fire emergency lighting), but for life requires long, from existing market watch with battery lamp life 1h over relatively small, therefore also requires centralized storage battery