Emergency Light Manufacturers point out that in addition to light sources and luminaires, power-type emergency lights should also include battery packs, inverters, charging circuits, and control and protection circuits. Can be used as a variety of emergency lighting, more used to evacuate the marker lights. The main technical requirements are as follows:

　　




1. Battery: A fully enclosed, maintenance-free, rechargeable battery is required. Usually, a nickel-cadmium battery should be used. The conditions are excellent, but lead-acid batteries can be used, but the size is larger and the life is shorter, but the car battery should not be used. Original batteries are not allowed.

　　

Under normal charging and discharging conditions, according to the full charge and discharge cycle, the service life of the battery shall not be less than 4 - 5 years, or not less than 400 times. For lead-acid batteries, it should not be less than 200 times.

　　

The battery should not be charged for more than 24 hours.

　　

2. There should be frequency converter, control, protection and charging. Generally there should be overcharge protection. For lead-acid batteries, over-discharge protection must also be provided. For cadmium nickel batteries, the effect of overdischarge is small.

　　

3. The inverter circuit should guarantee a certain lumen efficiency. That is, the ratio of the luminous flux output by the light source after switching from the normal power source to the battery power source. For emergency lights that are not continuously operated, the luminous flux after switching to battery power 5S is not less than 80% of their rated luminous flux. This country has different regulations. Some national regulations can be negotiated by the production plant and can even be set to 5% and 50%. Special attention should be paid to lighting design. Emergency lighting should not be calculated based on the rated flux of the light source. Negotiate data calculations.

　　

4. The voltage at the end of battery discharge should not be less than 80% of the rated voltage. The proportion of some countries is higher. At the end of the discharge, it should be the end of the emergency continuous working time specified by the emergency light.

　　

5. Manual operation switches should not be installed between the battery pack and the light source in the emergency light. The normal power side of the emergency light should be equipped with short circuit protection; in addition, there should be a charging indicator and a test button.

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