FIRE ALARM SYSTEM DOCX

Title	FIRE ALARM SYSTEM
Author	Zuraidi Mustafa
Pages	28
File Size	41.5 KB
File Type	DOCX
Total Downloads	173
Total Views	657

Summary

Description

___________________________________________ 1. FIRE ALARM SYSTEM The Fire Alarm System of fire protection system is installed throughout this project. Fire alarm system provides audible and visual alarm signals as a result of manual operation of breakglass or automatic operation of protective equipment, such as heat detector or smoke detector. Audible and / or visual alarm signal devices are commonly known as alarm indicating or signaling devices. Breakglass, flow switches and smoke detectors are commonly known as alarm initiating devices. Usually the system consists of breakglass, smoke and heat detectors, audible alarm devices like alarm bells, buzzer, sirens flash light connected to a fire alarm control panel by electrical wiring, which is supervised for continuity. The supervision is performed by passing a small current through the wiring and monitoring the current received at the control panel. If the current is not received at the control panel, a trouble signal is sounded. Fire alarm circuits can be arranged to operate under normal, open or closed (group) condition, depending upon the sophistication of the system. Emergency Power supply would be provided to main fire alarm panel and this would consists of batteries complete with battery charger. It is very important that this system should be tested and maintenance periodically and all system inspection recorded in a log book and kept at the main fire alarm control panel. The power supply for the main fire alarm panel (MFAP) is supplied directly from the TNB supply. A set of sealed lead acid battery are provided in case of power supply failure to backup the system for at least 72 hours during such failure. All fire alarm detection systems have one basic purpose – to get a PERSON or SYSTEM to do something about fire. After detection, the system must transmit an alarm. The alarm initiates an action to puts out the fire. Without the full circle – detection, alarm, extinguishment the system is of limited value. A fire protection signaling system must be able to perform signification functions to accomplish its intended purpose. First, the system must detect the fire rapidly, before there is significant damage. Secondly, it must start a sequence of events to intelligently evacuate occupants of the building who might be endangered by the fire. Thirdly, it must be transmit an alarm or signal to notify some responsible party (or an automatic) to start extinguishment....