Emergency lights
- Applications:
- Building Systems
- Cleaning, Washing
- Facility Management
- Industrial Plant
- Mobility
- Series/Measures
- Voltage monitoring
- Task:
- When the lights fail in public buildings (such as schools) because of undervoltage, the emergency lighting systems must be activated in publicly accessible areas.
- Solution
- The voltage relay monitors the 3 phases of the supply voltage in the switch cabinet.
When the voltage level falls below the set threshold of 85% of the nominal voltage in one of the 3 phases, an installation contact switches the emergency lights on.
When the supply voltage returns to the nominal level, the emergency lights are then switched off after a short delay (implemented with a delayed-action timing relay) and the normal lighting system is switched on.
- Use/value:
- - Personal protection / prevention of accidents
- Indication of undervoltage / the failure of each individual phase
- Fulfils the VDE 0108-100 and VDE 0100-718 standards
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