Fire Alarm System
An automatic fire Detecting is designed to detect the unwanted presence of fire. By monitoring environmental changes associated with combustion. In general, a fire detecting system is classified as either automatically actuated, manually actuated, or both. Automatic fire alarm systems are intended to notify the building occupants to evacuate in the event of a fire or other emergency, report the event to an off-premises location in order to summon emergency services, and to prepare the structure and associated systems to control the spread of heat and smoke.
Two Types detecting system: i) Addressable ii) Non Addressable
Addressable: Addressable fire alarm system that comprises one or more circuits with detectors connected in parallel, and each detector has a unique identification (address) on the circuit. When the conditions for an alarm signal are satisfied at the detector, an alarm signal is transmitted via the circuit to the fire indicator panel. In an addressable system, each detector has the ability to identify itself and its current status.
ii) Non Addressable: A non-addressable fire alarm system, also known as a zoned system, is considered a low-cost solution for some properties. However, its price advantage is less than it used to be, and may be outweighed by the added features of an addressable system. There are two types of detector system for addressable & non- addressable.
This are- i) Heat Detector ii) Smoke Detector
A heat detector is a fire alarm device designed to respond when the convected thermal energy of a fire increases the temperature of a heat sensitive element. The thermal mass and conductivity of the element regulate the rate flow of heat into the element. All heat detectors have this thermal lag. Heat detectors have two main classifications of operation, "rate-of-rise" and "fixed temperature."
A smoke detector is a device that detects smoke, typically as an indicator of fire. Commercial, industrial, and mass residential devices issue a signal to a fire alarm system, while household detectors, known as smoke alarms, generally issue a local audible or visual alarm from the detector itself. Fire detecting system should work as centralizing system. Other accessories of centralizing system are
A Fire Alarm Control Panel (FACP), or Fire Alarm Control Unit (FACU), is the controlling component of a Fire Alarm System. The panel receives information from environmental sensors designed to detect changes associated with fire, monitors their operational integrity and provides for automatic control of equipment, and transmission of information necessary to prepare the facility for fire based on a predetermined sequence. The panel may also supply electrical energy to operate any associated sensor, control, transmitter, or relay. There are four basic types of panels: coded panels, conventional panels, addressable panels, and multiplex systems.
Emergency Exit light/ flash light
An Emergency exit light/flash light is a device in a public facility (such as a building, factory or organization) denoting the location of the closest emergency exit in case of fire or other emergency.