Evacuation emergency lighting and sign lamps, collectively referred to as fire emergency lighting, are important products required in fire safety measures. Usually it should provide lighting like ordinary lamps. When an emergency occurs, such as an earthquake, fire or circuit failure, which causes the power supply to suddenly interrupt, all light sources have stopped working. At this time, it must immediately provide reliable lighting, and indicate the direction of evacuation and the location of emergency exit, so as to ensure the smooth evacuation of people staying in the dark. So what is the working principle of emergency lights?

Emergency lighting system is mainly independent control with its own power supply. The normal power supply is connected to the general lighting power supply circuit. It usually charges the emergency lamp battery. When the normal power supply is cut off, the standby power supply (battery) automatically supplies power. This type of emergency lamp has a large number of electronic components such as voltage conversion, voltage stabilization, charging, inversion, storage battery and so on. When the emergency lamp is in use, maintenance and failure, the battery needs to be charged and discharged.

The other is the centralized control type of centralized power supply. There is no independent power supply in emergency lamps. When the normal lighting power supply fails, the centralized power supply system supplies power. In this form of emergency lighting system, all the complicated electronic circuits inside the lamps are omitted. Emergency lighting lamps are the same as ordinary lamps and lanterns. The centralized power supply system is set in a dedicated room.

So what are the common failures and maintenance?

If the green light is on, the red light is not bright, the yellow light is not bright.

Cause: This is caused by no charging. The possible cause of this phenomenon is battery damage or the charging circuit is disconnected.

Solution: Use the multimeter's DV file 20V to measure the battery and see if there is voltage. If you can't solve the problem if you put on a new battery, it may be that the battery is reversed.If the charging circuit is disconnected, you can use the universal variable detection to search along the red light to the charging interface.

If the green light is not bright, the red light is not bright, the yellow light is not bright.

Reason: This may be a fault in the power circuit. It can detect the bridge rectifier circuit composed of four diodes, the fuse at the power supply, and the transformer.

If the yellow light is bright.

Check if the two lamp pools are normal and the fuse at the charging station is normal.

If the emergency studio, the bulb will be extinguished in less than 2 minutes.

The resistance of the resistor on the left side of Q13 has changed. It is ok to replace a resistor of 1 kilo ohm.

Because the battery is charged for a long time. There is no full protection circuit. Therefore, it is the easiest to break, followed by the transformer, and then the drive transistor, if the bulb is lit for a long time. It is easy to damage if it is hot. Generally, these components can be replaced to work normally.

In summary, the common faults and maintenance of emergency lighting are given to you in detail, I hope to help you, if you need to know more, you can leave a message to our company.

NASITER,specialized in producing emergency light, emergency exit sign light, emergency battery backup, and intelligent emergency evacuation guidance system etc, a majority of these are patented products. The company obtained over 500 patents including the patents for invention, utility models and design patents, and is identified as"National High-tech Enterprise.