Fire signaling and communication system

For communication on fire the telephone, radio, wireless telephone, devices of automatic and manual-automatic communication are applied. For warning people in rooms the special system of communication, internal wireless network and also beeps can be used.

Automatic signaling system. Main structure elements of the system are: transducers which are installed in building or on territory of an object and are for making a signal on fire; detection station to receive signals from transducers; communication lines, which connect transducers with detectors; power supply.

By principle of operation the transducers are divided into thermal, smoke, light, combined.

The thermal transducers respond to increase of environmental temperature and in turn are divided into maximum ones to turn on when temperature is increased to critical level; differential - turn on when environmental temperature increases with the certain velocity; maximum - differential.

Smoke transducers are divided into ionization and photoelectric. Smoke transducers can't be set in rooms with air temperature below – 30°C and above 60°C, relative humidity higher than 80 %, and also in very dusty rooms and areas where acid vapors can be.

The light transducers respond to ultra-violet or infra-red radiation.

Combined transducers are based on principles of operation of both thermal and smock transducers.

The signals from transducers come to:

- detection stations of fire signaling system;

- automatic means for fire extinguishing.