Emergency light is a general term for lamps and lanterns for emergency lighting. The fire emergency lighting system mainly includes accident emergency lighting, emergency exit signs and indicator lights. It is set up to guide the trapped people to evacuate or launch fire fighting and rescue operations after the normal lighting power supply is cut off in the event of a fire. However, in the daily inspection, it was found that there are many problems in the selection, installation and use of fire emergency lamps. Therefore, the reasonable selection of the power supply control mode and wiring mode of the emergency lighting system, and the daily maintenance work will directly affect the function of the fire emergency lighting system.
This emergency light adopts power control switch, its performance is relatively stable, and it can adapt to a relatively loose voltage environment; it adopts microprocessor centralized control technology and American FAIRCHILD PWM IC voltage regulation technology; constant current and constant voltage charging technology, these technologies can be effectively improved battery life. It also has intelligent automatic fault detection function, using high-quality nickel-cadmium battery, large battery capacity; LED light source, not only in line with energy saving awareness, but also in line with the effect of increasing battery life.
This kind of sign light adopts high-quality nickel-cadmium battery, which has large capacity and can be continuously charged and discharged for a large number of times, generally 500-1000 times; it also uses high-quality LED light source, which can achieve the effect of energy saving and battery life extension. The use time can reach more than 100,000 hours. Like the YYJD-ZZ-66 emergency light, this kind of emergency light uses a switching power supply to control the circuit, its performance is relatively stable, and it can also adapt to a relatively loose voltage environment. Its appearance design material is excellent and beautiful.
With wall-mounted installation, this type of lamp has an overcharge protection function. At the same time, the lamp has over-discharge protection function.
The shell material is an iron sheet bending die, and its surface is painted, which is simple and very beautiful. At the same time, it adopts LED light source, which can achieve energy saving, environmental protection and high-efficiency battery life. The battery adopts nickel-separated rechargeable batteries. long time and stable performance.
The emergency lighting system used in China is mainly of the independent control type with its own power supply. The normal power supply is connected to the general lighting power supply circuit, and the emergency light battery is usually charged. When the normal power supply is cut off, the backup power supply (battery) automatically supplies power. This form of emergency light has a large number of electronic components such as voltage transformation, voltage stabilization, charging, inverter, and storage battery inside each lamp. The emergency light needs to be charged and discharged during use, maintenance, and failure.
The other is the centralized control type of centralized power supply. There is no independent power supply in the emergency lamps. When the normal lighting power supply fails, the centralized power supply system supplies power. In this form of emergency lighting system, the complicated electronic circuits inside all lamps are omitted, emergency lighting lamps are no different from ordinary lamps, and the centralized power supply system is set in a dedicated room.
Compared with emergency lamps with independent control of their own power supply, centralized control of emergency lamps with centralized power supply has the advantages of convenient centralized management, user self-inspection, fire supervision and inspection, prolonging lamp life, improving emergency evacuation efficiency, etc. The system has good reliability and service life. long, convenient maintenance and management, low system price. However, since there is no backup power supply (battery) in the centralized power supply centralized control type emergency lighting fixture, if the power supply line fails, it will directly affect the normal operation of the emergency lighting system, so the power supply line is laid with special fire protection requirements. . The self-contained power supply independent control emergency lighting has a backup power supply (battery) in each emergency lighting, so there is no special requirement for the power supply line, and the failure of the power supply line will not affect the function of the backup power supply. When the emergency lamp fails, it generally only affects the lamp itself, and has little impact on the entire system.
When choosing emergency lighting, the emergency lighting system should be reasonably selected according to the specific situation. Generally speaking, for new projects or projects with fire control rooms, the wiring should be unified as far as possible during the construction process, and centralized power supply centralized control emergency lighting should be used; Power independent control type emergency lighting.