Control and indication equipment used to receive, display and transmit fire alarm signals, send control signals and have other auxiliary functions
Fire alarm device refers toAutomatic fire alarm systemIt is used to receive, display and transmit fire alarm signals, and can send control signals and control indicating equipment with other auxiliary functions.Fire alarm controllerBe responsible forFire detectorProvide a stable working power supply, monitor the working status of the detector and the system itself, receive, convert, and process the alarm signal output by the fire detector, conduct audible and visual alarm, indicate the specific location and time of the alarm, and perform the corresponding auxiliary control and other tasks at the same timefire alarm system The core components of.Manual fire alarm buttonandFire alarm bell, belong toFire alarm device。In addition, there are smoke sensors, temperature sensors and other alarm devices.
1．Fire alarm controllerAccording to different purposes, it can be divided intoRegional fire alarm controller, centralized fire alarm controller and general fire alarm controller.In recent years, with the development of fire detection and alarm technologyAnalog quantity, bus system, intelligentFire detection and alarm systemIn many occasions, fire alarm controllers are no longer divided into three types: regional, centralized and universal, but collectively called fire alarm controllers.
The main feature of the regional fire alarm controller is that the controller is directly connectedFire detectorProcessing various alarm signals is one of the most commonly used equipment to form an automatic alarm system.
The main feature of the centralized fire alarm controller is that it is generally not connected to the fire detector, but to the regional fire alarm controller to process the signals sent by the regional fire alarm controller, which is often used in larger systems.
currencyFire alarm controllerIts main feature is that it has dual features of regional and centralized two-level fire alarm controller.By setting or modifying some parameters (hardware or software), it can be used at the regional level to connect the detector;It can also be used for intermediate level collection and connectionRegional fire alarm controller。
3. Fire alarm controller can be divided into multi wire fire alarm controller and bus fire alarm controller according to its system connection mode.
Corresponding mode
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MultilineFire alarm controllerIts main feature is that its detector and controller are connected in one-to-one correspondence mode.Each detector is connected to the controller by three wires, so there are many wires, which is only applicable to small fire alarm controller system.
The main feature of bus type fire alarm controller is that the controller and detector shall be connected by bus (few wires).All detectors are uniformly connected in parallel or in series on the bus (generally, the number of buses is 2-4), which is easy to install, debug and use, and is suitable for large fire alarm controller systems.
In the fire alarm device, there are also some repeaters, area displaysFire display panelSuch alarm devices with incomplete functions can be regarded as the evolution or supplement of fire alarm controller.It is used under specific conditions and belongs to the same fire alarm device as the fire alarm controller.
Fire alarm controllerIts basic functions mainly include: main power and standby power automatic conversion, standby power charging function, power failure monitoring function, power supply working status indication function, power supply function for detector circuit, detector or system fault audible and visual alarm, fire audible and visual alarm, fire alarm memory function, clock unit function, fire alarm priority function,Sound alarm sound silencing and sound alarm again.
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MOQF2Electrical fire monitoring systemIt belongs to the early warning system of leakage monitoring, which is different from the traditionalAutomatic fire alarm systemThe difference is that the early alarm of electrical fire monitoring system is to avoid losses, while the traditional automatic fire alarm system is to reduce losses. This paper briefly introduces the design, application, basic composition and working principle of electrical fire equipment and electrical fire monitoring system.
1. Characteristics of the system
The electrical fire monitoring system belongs to the early warning system. Different from the traditional automatic fire alarm system, the early warning of the electrical fire monitoring system is to avoid losses, while the traditional automatic fire alarm system is to reduce losses.Therefore, this is the fundamental reason why the electrical fire monitoring system still needs to be installed in new or reconstruction projects, especially in units that have installed automatic fire alarm systems.2. Related introduction
MOQF2-400
In recent years, electrical fire accidents have remained at a high level. Taking 2005 as an example, two of the ten major fires with the largest number of deaths in Liaoyuan Central Hospital in Jilin Province and South China Hotel in Shantou were electrical fires. Relevant experts actively called for effective technical precautions to be taken as soon as possible to curb the rising trend of electrical fires, and relevant government departments also attached great importance to them,Relevant standards and specifications have been formulated or modified successively, which are required to be set in the buildingLeakage fire alarm system。To preventElectrical fireOccurrence, reduce fire hazard, and reasonably set tenElectrical fire monitoring systemThis procedure is formulated to ensure the construction quality and service performance of the electrical fire monitoring system and protect personal and property safety.《Code for fire protection design of high-rise civil buildings》Article 9.5.1 of GB50045-95 (2005 version) partially revised and the mandatory national standard Installation and Operation of Residual Current Operated Protective Devices GB13955-2005 emphasize thatResidual current operated protective deviceIn order to preventGround faultThe protective effect of the electrical fire caused by it requires the installation of residual current action fire monitoring system in the building.It can be said that the national standards and specifications for the prevention of building electrical fires and the installation of leakage fire alarm systems are basically complete (and other relevant specifications are being submitted for approval). In the future, more and more leakage fire alarm systems will be designed and applied in relevant places.
two point twoElectrical fire detector(hereinafter referred to as detector)explorer for electric fire
It is a field detection device for electrical abnormal signal detection composed of leakage, temperature and other signal sensors individually or in combination.
With field operation, display and alarm functions, it can form one or more detectorsElectrical fire monitoringNode, and can communicate with the central monitoring host in real time.
It is a field device with monitoring and detection functions, integrating signal detection, operation display and audible and visual alarm, and can communicate with the central monitoring host in real time.
two point fiveField monitoring device (hereinafter referred to as field device)monitoring device of the scene
Audible and visual alarm when the electric fire detection parameters such as leakage of the monitored power line reach the action set value.two point sevenearly warningpre-alarm
The audible and visual alarm sent out when a parameter of the monitored power line reaches 50% of the set value of the monitoring alarm is a slower alarm sound, which is different from the monitoring alarm. The purpose is to remind the personnel on duty to pay attention, so as to eliminate the fault early.
two point eightFault alarmtrouble alarm
Fixed time alignment according to a certain periodElectrical fire monitoring systemIt is a slow audible and visual alarm when it detects a fault (such as bus open circuit, etc.) in a certain part of the system during its own patrol inspection.
two point nineMonitoring nodemonitorpoint
For the electric fire real-time monitoring system, it is a point on the system transmission bus, and the total number of nodes determines the monitoring scale of the system.In physical sense, a monitoring node is composed of a monitor and a detector, which can realize theElectrical fire monitoringAlarm and information upload function.
two point one zeroSingle circuitmonitorsingle circuit monitor
It forms an electrical fire monitoring node with a detectorElectrical fire monitor, used for a distribution circuit (i.eSingle circuit）Electrical fire monitoring and alarm of.
two point one oneMulti loop monitormultiple circuit monitor
The electrical fire monitor consisting of one monitor and several detectors in the distribution box cabinet is used for electrical fire monitoring alarm of multiple distribution circuits (i.e. multiple circuits).
two point one twoCentral monitoring host (hereinafter referred to as host)main unit for centralized control
Can receive fromElectrical fire monitorOr monitor the alarm signal of the detector, send out audible and visual alarm, indicate the alarm position, record and save the alarm information on the upper monitoring management computer of the system.
two point one threeElectrical fire monitoring system(hereinafter referred to as monitoring system)Alarm and control system for electric fire prevention
By the hostsystem bus A digital real-time monitoring system composed of and field devices is used to detect abnormal electrical parameters associated with electrical fire in power distribution lines, and has the functions of display, alarm, operation and recording.
two point one fourSystem bus (hereinafter referred to as bus)system communication bus
Electrical fire monitoring systemThe physical medium used to connect the host computer and the field monitoring device in order to transmit information in the specified standard format.
