What is a local alert system?

Local warning systems are a complex that unites a human resource, consisting of persons on duty at a potentially dangerous facility, technical means intended for alerting about emergencies, communication lines and broadcasting networks.

Their task is:

• Bringing information to the personnel at the time of the accident in the territory.
• Urgent notification of the management of the enterprise.
• Bringing information to the civil defense services, rescuers.

By arranging local warning systems at production, it is necessary to strictly monitor that they are interfaced with the automated central alert system of the city, village, etc., in which they are located.

In the event of an emergency, SALW solves the problem of loud warning, ensures the transmission of evacuation messages, commands evacuation, and does not allow panic.

At other times, SALW can be used to convey ads or background music. In any space that provides for a large number of people (shop, stadium, shopping center, theater, educational institutions, hotels, railway stations, etc.), there must necessarily be a local warning system.

If we consider local warning systems as technical devices, it becomes clear: these are several blocks connected together.

• Control block. Includes a computer or, in the case of an analog system, a matrix control unit.
• Signal switching unit.
• Sources and amplifiers of sound. These can be microphones on the alarm panel, horns, tones, sirens, etc.
• Console, stationary and remote, allowing to provide a place of work for the dispatcher on duty.
• Loudspeakers.

It should be noted that full-fledged local warning systems should include alarm sirens, voice or voice messages, lights, beacons or the like. Light devices.

The system of sound message, issuing an alarm with a siren or a howler, attracts people's attention, reporting on emergency situations. Hearing this sound, workers must quickly evacuate from the territory along a pre-established path.

The system of voice notification (or voice) can transmit pre-recorded short information or the speech of the dispatcher on duty. Such information is usually transmitted in the form of short messages. Voice notification is considered the most informative.

The light warning system is designed, firstly, to draw attention to the flashing of signal lights, stroboscopes, or the like. Secondly, the light warning system includes autonomous panels that indicate the location of exits or other evacuation routes.

Local warning system is calculated taking into account the features of the enterprise, its area, the number of rooms. In addition, it must take into account the architectural features of the building, its plan, the acoustic properties of the material from which the building is built.

That is why the local warning system and all the equipment that is part of it must meet certain standards.