Performance Requirements for Fire Emergency Lighting and Evacuation Indicating System 1.Emergency switching time The emergency switching time of the system should not be more than 5 seconds; the emergency switching time of the system used in high-risk areas should not be more than 0.25S. 2.System self-test After 48 hours of continuous operation, the main power of the system is automatically transferred from the main power to the emergency working state every (30 +2) D and lasts for 30-180 seconds, and then automatically restored to the main power working state.The main power of the system will work continuously every other year and automatically change from the working state of the main power to the emergency working state and continue until discharge termination, then automatically restore to the working state of the main power, and the continuous emergency working time is not less than 30 minutes. 3.Emergency Conversion Control In the fire control room, manual automatic control devices should be set up to forcibly switch the fire emergency lighting and evacuation indication system and put into emergency operation.In places where automatic fire alarm system is set up, the switching and emergency input of fire emergency lighting and evacuation indication system should be controlled by the linkage of automatic fire alarm system.