FIRE

67 %
33 %
Information about FIRE
Entertainment

Published on February 23, 2014

Author: bsvr

Source: authorstream.com

Electrical Fires! : Electrical Fires! Can we not eliminate them? Fire Detection, Alarm & Protection Systems : Fire Detection, Alarm & Protection Systems Fire situation in a room: Fire situation in a room New Developments and Applications: New Developments and Applications Fire Survival Cables New Developments and Applications: New Developments and Applications Fire Alarm Fire Check Door Closure Smoke Extraction by AHU : Smoke Extraction by AHU Compartments & Smoke Extraction: Compartments & Smoke Extraction Pressurisation : Pressurisation Optical, Ionization & Beam Detectors: Optical, Ionization & Beam Detectors Optical, Ionization & Beam Detectors: Optical, Ionization & Beam Detectors Optical & Ionization detectors both were used on an alternate basis to cover or rather balance their charecteristics. In another paper presented yesterday a new optical detector with a flat response for all types of fires was explained. Sprinklers : Sprinklers Public Address: Public Address Talk Back Car Hailing Emergency Announcement Music Service Intercom Avoid Fires: Avoid Fires Most fires originate from causes other than electricity But any fire from any cause will attack the electrical system Damaged electrical system generally leads to the conclusion “Electrical Short circuit”. After damage Electrical system will feed the fire. Electrical Fires: Electrical Fires Increase in Power consumption Increase in electrical gadgets Increase in generation & distribution system capacities Consequent increase in Fault Levels Resultant higher energy feed from electrical system to the fire originated from any cause Energy fed to a fault: Energy fed to a fault E fault = V fault X I fault X t = I fault 2 X t X R fault Fault resistance changes dynamically always varying to our disadvantage. Control over fault possible by control of time “ t ” only. Protective Devices and their contribution to fire prevention.: Protective Devices and their contribution to fire prevention. Rewirable fuses HRC Fuses Miniature Circuit Breakers Residual Current Circuit Breakers Fires due to other components of Electrical distribution systems: Fires due to other components of Electrical distribution systems Aluminum conductors ban on Copper due to shortage hasty substitution by aluminum terminals not suited for different properties of aluminum cold flow, ductility & surface oxidation lack of jointing techniques Fires due to other components of Electrical distribution systems: Fires due to other components of Electrical distribution systems Use XLPE or FRLS insulation instead of PVC for aluminum cables Donot use aluminum in sizes less than 10mm 2 . Use copper. Capacitors in window AC units today’s capacitors do not burst. Chokes for fluorescent tubes use with thermal cutout Fires due to common Electrical appliances: Fires due to common Electrical appliances Room heaters Radiation type: Fan type safe Hot plates : carelessness Heaters in window AC units banned in CPWD Heaters in package AC units airstat, & safety thermostat non combustible insulation New Devices, Materials & Techniques to avoid FIRE: New Devices, Materials & Techniques to avoid FIRE Devices Fault current limiter PTC semiconductor to limit fault current - ABB &Togami Thermal cutouts. Bimettalic & semiconductor Fire survival cables Busbar trunking New Devices, Materials & Techniques to avoid FIRE: New Devices, Materials & Techniques to avoid FIRE Devices Double shutter distribution boards Busbar for distribution minimise cables Solid state switches & contactors Vaccum switchgear Dry type transformers New Devices, Materials & Techniques to avoid FIRE: New Devices, Materials & Techniques to avoid FIRE Materials FRLS, XLPE insulated cables instead of PVC SMC enclosures & cable trays instead of steel for switchgear-double insulation PE foam instead of PUF New Devices, Materials & Techniques to avoid FIRE: New Devices, Materials & Techniques to avoid FIRE Techniques Heat detector & Automatic CO 2 injection in switchgear cubicles Hot water coils instead of electrical strip heaters in Air handling units of AC systems Summary: Summary The concept that “ electricity is the cause of fire ” is not correct. Electrical system will invariably be the first system to be affected by fire from any cause. Post fire scenario will always show a damaged electrical system. Design, proper choice of specifications & quality in in installation will totally eliminate the possibility of fire from electricity. Summary: Summary Common yardsticks or guidelines for electrical installations have to be updated keeping the increase in system fault levels & the availability of devices & techniques to eliminate fire from electrical origin. Substitutes do cost a little more, but it is negligible in the context of loss to life & propery Acknowledgment: Acknowledgment Thank you: Thank you

Add a comment

Related presentations

Related pages

@fire

@fire Internationaler Katastrophenschutz Deutschland e.V. Hilfsorganisation, mit der Aufgabe schnelle und kompetente Auslandshilfe bei verheerenden ...
Read more

Fire - Wikipedia

Fire is the rapid oxidation of a material in the exothermic chemical process of combustion, releasing heat, light, and various reaction products. Slower ...
Read more

Fire (classical element) - Wikipedia

Fire has been an important part of all cultures and religions from pre-history to modern day and was vital to the development of civilization. It has been ...
Read more

MediaFire - File sharing and storage made simple

MediaFire is a simple to use free service that lets you put all your photos, documents, music, and video in a single place so you can access them anywhere ...
Read more

Fire HD 6-Tablet: Volle Leistung im Taschenformat, perfekt ...

Mit seinem kompakten Taschenformat begleitet Sie das Fire HD 6 überall hin - wunderschönes 6-Zoll-HD-Display, doppelt so schneller Quad-Core-Prozessor.
Read more

Amazon Fire TV mit 4K Ultra HD - Amazon.de | Streaming ...

Amazon Fire TV, jetzt 4K Ultra HD kompatibel. Genießen Sie mit Ihrem kompatiblen 4K UHD TV Filme und Serienepisoden in atemberaubender 4K Ultra HD-Auflösung.
Read more

Fire | Define Fire at Dictionary.com

Fire definition, a state, process, or instance of combustion in which fuel or other material is ignited and combined with oxygen, giving off light, heat ...
Read more

Kostenlose E-Mail - Freemail Adresse jetzt einrichten

Kostenlose E-Mail adresse und Freemail von Firemail. Jetzt kostenlos email adresse sichern sofort starten.
Read more

Fire - definition of fire by The Free Dictionary

fire (fīr) n. 1. a. A rapid, persistent chemical change that releases heat and light and is accompanied by flame, especially the exothermic oxidation of a ...
Read more

I-FIRE - Salut!

Feuer ist ein Schlüsselwort im Reggae. Auch wenn oft missverstanden und fehl interpretiert, das Feuer muss brennen. In der Performance, den Riddims, den ...
Read more