Fire detection and alarm systems
Expert-defined terms from the Advanced Certificate in Tunnel Fire Protection course at London School of Business and Administration. Free to read, free to share, paired with a globally recognised certification pathway.
**Addressable Fire Alarm System #
** An addressable fire alarm system is a type of fire alarm system that assigns a unique address to each device in the system, allowing for individual identification and location of the device in case of an alarm. This system provides detailed information about the fire's location, making it easier to respond to and extinguish the fire.
**Alarm Signal #
** An alarm signal is a signal generated by a fire alarm system in response to the detection of smoke, heat, or flame. The signal can be visual, audible, or both, and is used to alert building occupants and emergency responders of a potential fire.
**Automatic Fire Detection #
** Automatic fire detection is the use of electronic devices to detect the presence of smoke, heat, or flame in a building or tunnel. These devices can detect a fire in its early stages and trigger an alarm, allowing for a quick response and minimizing damage.
**Beam Detector #
** A beam detector is a type of fire detector that uses a infrared beam to detect the presence of smoke. The beam is transmitted across a room or tunnel and if the beam is interrupted by smoke, the detector will trigger an alarm.
**Conventional Fire Alarm System #
** A conventional fire alarm system is a type of fire alarm system that uses a series of wired zones to divide a building or tunnel into sections. Each zone has its own circuit and devices, and when a device in a zone is triggered, the corresponding zone circuit is activated, indicating the location of the fire.
**False Alarm #
** A false alarm is an alarm signal generated by a fire alarm system in the absence of an actual fire. False alarms can be caused by a variety of factors, including equipment malfunctions, user errors, and environmental factors.
**Fire Alarm Control Unit (FACU) #
** A fire alarm control unit (FACU) is the central component of a fire alarm system. It receives input from fire detectors, initiating devices, and other system components, and sends output signals to activate alarm devices, such as horns, strobes, and speakers.
**Fire Alarm Panel #
** A fire alarm panel is a control unit that manages and monitors a fire alarm system. It receives input from fire detectors, initiating devices, and other system components, and sends output signals to activate alarm devices, such as horns, strobes, and speakers.
**Fire Detection and Alarm Systems #
** Fire detection and alarm systems are electronic systems used to detect the presence of smoke, heat, or flame in a building or tunnel and alert building occupants and emergency responders of a potential fire.
**Fire Detection Zones #
** Fire detection zones are areas within a building or tunnel that are monitored by a fire detection system. Zones are typically divided by walls, floors, or other physical barriers and are used to isolate and contain fires, making it easier to respond to and extinguish them.
**Flame Detector #
** A flame detector is a type of fire detector that uses a variety of technologies, such as ultraviolet (UV) and infrared (IR) detection, to detect the presence of open flames. These detectors are commonly used in high-risk areas, such as chemical plants, refineries, and oil rigs.
**Heat Detector #
** A heat detector is a type of fire detector that senses the temperature of the air or a surface. These detectors are commonly used in areas where smoke detectors may be prone to false alarms, such as kitchens and workshops.
**Initiating Device #
** An initiating device is a device that triggers a fire alarm system when it detects the presence of smoke, heat, or flame. Examples of initiating devices include smoke detectors, heat detectors, and manual pull stations.
**Manual Pull Station #
** A manual pull station is a device that allows building occupants to manually trigger a fire alarm system. These stations are typically located near building exits and in other high-traffic areas.
**Notification Appliance #
** A notification appliance is a device that provides visual or audible signals to alert building occupants of a potential fire. Examples of notification appliances include horns, strobes, and speakers.
**Optical Smoke Detector #
** An optical smoke detector is a type of smoke detector that uses a light source and a sensor to detect the presence of smoke. These detectors are commonly used in areas with low ceilings and high airflow, such as lobbies and atriums.
**Rate #
of-Rise Heat Detector:** A rate-of-rise heat detector is a type of heat detector that senses the rate of temperature increase in a space. These detectors are triggered when the temperature rises above a set threshold within a set period of time.
**Smoke Detector #
** A smoke detector is a device that senses the presence of smoke in the air. These detectors can be either ionization or photoelectric, and are commonly used in residential and commercial buildings.
**System Sensitivity #
** System sensitivity is the ability of a fire detection system to detect the presence of smoke, heat, or flame. The sensitivity of a fire detection system can be adjusted to minimize the risk of false alarms while still providing adequate protection.
**Tunnel Fire Detection #
** Tunnel fire detection is the use of electronic devices to detect the presence of smoke, heat, or flame in a tunnel. These devices can detect a fire in its early stages and trigger an alarm, allowing for a quick response and minimizing damage.
**Two #
Stage Alarm:** A two-stage alarm is an alarm signal that consists of two stages: a pre-alarm and a main alarm. The pre-alarm stage is used to alert building occupants of a potential fire and the main alarm stage is used to activate emergency response procedures.
**Voice Evacuation System #
** A voice evacuation system is a public address system that is used to provide voice instructions to building occupants in the event of an emergency. These systems can be used to provide clear and concise instructions on how to evacuate the building, reducing confusion and panic.
**Zoned Fire Alarm System #
** A zoned fire alarm system is a type of fire alarm system that divides a building or tunnel into zones. Each zone has its own fire detection and alarm system, allowing for isolated and specific response to a fire.