Electrical Contracting News (ECN) July 2017 - Page 44

SPECIAL FEATURE FIRE DETECTION & SAFETY KEEP IT REAL False alarms can cause disruptions to businesses and lives, cause unnecessary stress and can be very expensive. Although the number of incidents has been declining over the last 10 years, the fire protection industry continues to look for better and increasingly safer solutions to avoid false alarms. Charles Smith, head of product management at Apollo Fire Detectors, explains how technology can improve fire detection and help avoid false alarms. A ccording to the National Office of Statistics, over 300,000 false alarms were raised in the UK in 2014/15. The FIA quotes the estimated cost of false alarms in the UK as being in excess of Β£1bn a year. The fire protection industry has been facing the challenge to improve the design of detectors so that they detect and alert to real fires, whilst minimising the risk of false alarms. False alarms are caused by many factors, therefore there cannot be a single solution to preventing them either. Detector modes and algorithms have to be matched carefully with the potential fire risk when the system is being designed. Extreme care must be taken not to be overly concerned with avoiding false alarms at the risk of missing a genuine alarm. There are many fires that produce smoke but little heat (especially at ceiling height where the detector is most likely installed) or carbon monoxide. Well designed multisensor detectors in carefully selected modes can detect more fires than many single-sensor detect ½ΙΜΈ)±½Ι₯Ρ‘΅Μέ₯±°₯ΉΙ•…Ν”Ρ‘”…ΥΙ…δ½˜)Ρ‘”‘•Ρ•Ρ½Θ…Ή‘•±ΐΡΌ™₯±Ρ•Θ½ΥЁ΅½ΝΠ)™…±Ν”…±…ɡ́₯˜½ΙΙ•Ρ±δ…ΑΑ±₯•Έ)Q•‘Ή½±½δΝ½±ΥΡ₯½ΉΜ₯Ι”₯Ή‘ΥΝΡΙδΝ­₯±±Μ)•Ω•±½Α΅•ΉΡ́₯Έ™₯Ι”‘•Ρ•Ρ₯½ΈΡ•‘Ή½±½δ)…Ι”΅…­₯Ήœ„΅…ΝΝ₯Ω”½ΉΡΙ₯‰ΥΡ₯½ΈΡΌ)Ι•‘Ս₯ΉœΡ‘”₯Ή₯‘•ΉΡ́½˜™…±Ν”…±…Ι΅ΜΈ)₯™™•Ι•ΉΠΡεΑ•Μ½˜™₯Ι”‘•Ρ•Ρ½Ί…Ι”ΝΥ₯Ρ…‰±”)™½Θ„ΉΥ΅‰•Θ½˜…ΑΑ±₯…Ρ₯½ΉΜΈ… ™½Ι΄)Α…ΙЁ½˜Ρ‘”Ρ•‘Ή½±½δΝ½±ΥΡ₯½Έ°™½Θ•α…΅Α±”)΅Υ±Ρ₯Ν•ΉΝ½Θ‘•Ρ•Ρ½ΙΜΈ) 䁑•™₯Ή₯Ρ₯½Έ΅Υ±Ρ₯Ν•ΉΝ½Θ‘•Ρ•Ρ½ΙΜ)‘½ΥΝ”΅½Ι”Ρ‘…Έ½Ή”Ν•ΉΝ½Θ•œΈ‘•…Ё…Ή)½ΑΡ₯…°Ν•ΉΝ½ΙΜΈQ‘•Ι•™½Ι”°Ρ‘•δ‘…Ω”Ρ‘”)…‰₯±₯ΡδΡΌ΅•…ΝΥΙ”΅Υ±Ρ₯Α±”™₯Ι”Α‘•Ή½΅•Ή„)…Ή½½Θ‘₯™™•Ι•ΉΠ…ΝΑ•Ρ́½˜Ρ‘”Ν…΅”™₯Ι”)Α‘•Ή½΅•Ή½ΈΈ ½΅‰₯Ή•°Ρ‘”Ι•…‘₯ΉΜ…Έ)‘•±ΐΡΌ‘₯͍Ι₯΅₯Ή…Ρ”‰•Ρέ••Έ„•ΉΥ₯Ή”™₯Ι”)…Ή„ΉΥ₯Ν…Ή”Ν₯Ή…°…ΉΡ‘•Έ΅…­”Ρ‘”)…ΑΑΙ½ΑΙ₯…Ρ”™…₯±Ν…™”‘•₯Ν₯½ΈΈ) ½΅Α…Ι•ΡΌ„ΝΡΙ…₯‘Ρ™½Ι݅ɐΝ₯Ή±”)Ν•ΉΝ½Θ‘•Ρ•Ρ½Θ°Ρ‘”‘•₯Ν₯½Έέ‘₯ )΅Υ±Ρ₯Ν•ΉΝ½Θ‘•Ρ•Ρ½ΘΡΌ‘½½Ν”₯́΅½Ι”)½΅Α±₯…Ρ•μ…ΉΡ‘…Ё₯́‰•™½Ι”…±°Ρ‘”)‘₯™™•Ι•ΉΠ΅½‘•Μ…ΉΝ•ΡΡ₯ΉΜ…Ω…₯±…‰±”…Ι”)Ρ…­•Έ₯ΉΡΌ…½ΥΉΠΈΩ•ΈΡ‘”΅½ΝЁ…‘Ω…Ή•Ρ•‘Ή½±½δ)έ₯±°Ή½Π΅…­”™₯Ι”ΑΙ½Ρ•Ρ₯½ΈΝεΝΡ•΅Μ)΅½Ι”Ν…™”…Ή•™™₯₯•ΉΠ₯˜•Ή₯Ή••Ί…Ή)ΝεΝΡ•΄‘•Ν₯Ή•Ί…Ι”Ή½Π₯Ω•Έ…•Ν́Ѽ)₯Ή™½Ι΅…Ρ₯½Έ…ΉΡΙ…₯Ή₯ΉœΈQ‘”™₯Ι”ΑΙ½Ρ•Ρ₯½Έ)₯Ή‘ΥΝΡΙδ₯́…±Ι•…‘䁕αΑ•Ι₯•Ή₯Ήœ„΅…ΝΝ₯Ω”)Ν­₯±±ΜΝ‘½ΙΡ…”…ΉΡ‘”Ν₯ΡΥ…Ρ₯½Έέ₯±°½Ή±δ)•Πέ½ΙΝ”…́΅½Ι”…Ή΅½Ι”•αΑ•Ι₯•Ή•)•Ή₯Ή••ΊɕΡ₯Ι”…Ή₯˜Ή•ά•Ή₯Ή••Ί…»ŠeΠ)‰”Ι•ΙΥ₯Ρ•…ΉΡΙ…₯Ή•₯ΈΡ‘”Ή•…ȁ™ΥΡΥΙ”Έ)Α…ΙЁ™Ι½΄‘•Ν₯Ή₯Ήœ…Ή₯ΉΝΡ…±±₯Ήœ)Ή•άΝεΝΡ•΅Μ°•Ή₯Ή••Ί…Ή₯ΉΝΡ…±±•ΙΜ)…Ι”‘•…±₯Ήœέ₯Ρ …Έ₯ΉΙ•…Ν₯ΉœΉΥ΅‰•Θ)½˜΅…₯ΉΡ•Ή…Ή”₯ΝΝՕ́έ₯Ρ °½ΘΥΑΙ…‘•Μ)ΡΌ°•α₯ΝΡ₯Ήœ™₯Ι”ΑΙ½Ρ•Ρ₯½ΈΝεΝΡ•΅ΜΈ)UΉ‘•ΙΝΡ…Ή‘₯ΉœΡ‘”₯΅Α…Π½˜΅…₯ΉΡ•Ή…Ή”)5½‘•Μ…ΉΝ•ΡΡ₯ΉΜ)Ω•Έ₯Έ‘•Ρ•Ρ½Ίέ₯Ρ ΅½Ι”Ρ‘…Έ½Ή”)Ν•ΉΝ½Θ°Ρ‘”‘•₯Ν₯½Έ½Έέ‘•ΈΡΌΌΡΌ)…±…Ι΄₯́₯ΉΙ•…Ν₯Ή±δΉ½Π©ΥΝЁ΅…‘”‰δ)Ρ‘”‘…Ι‘έ…Ι”₯ΈΡ‘”‘•Ρ•Ρ½ΘΈMΑ•₯…±±δ)‘•Ω•±½Α•…±½Ι₯Ρ‘΅Μ…Ή½΅΅ΥΉ₯…Ρ₯½Έ)ΑΙ½Ρ½½±Μ₯ΉΡ•Ι½ΉΉ•Π‘•Ρ•Ρ½Ί…Ή…±±½ά)₯Ή™½Ι΅…Ρ₯½Έ…ΉΩ•Ι₯™₯…Ρ₯½Έ•α‘…Ή•ΜΈQ‘”)ΝΥ₯Ρ…‰₯±₯Ρ䁽˜„‘•Ρ•Ρ½Θ…ΉΉ½Π‰”‰…Ν•½Έ)Ν•ΉΝ½ΘΡ•‘Ή½±½δ…±½Ή”…Ήε΅½Ι”Έ(ΠЁπ)Υ±δ€ΘΐΔά+Ša•Ω•±½Α΅•ΉΡΜ)₯Έ™₯Ι”)‘•Ρ•Ρ₯½Έ)Ρ•‘Ή½±½δ)…Ι”΅…­₯Ήœ)„΅…ΝΝ₯Ω”)½ΉΡΙ₯‰ΥΡ₯½Έ)ΡΌΙ•‘Ս₯Ήœ)Ρ‘”₯Ή₯‘•ΉΡΜ)½˜™…±Ν”)…±…Ι΅Μ»Šd)½ΈΡ‘”Α•Ι™½Ι΅…Ή”½˜…Έ•α₯ΝΡ₯ΉœΝεΝΡ•΄)₯́Ω₯Ρ…°‰•™½Ι”…Ήδ‘…Ή•Μ½Θ…‘©ΥΝΡ΅•ΉΡΜ)…Ι”΅…‘”ΈI•™ΥΙ‰₯Ν‘΅•ΉΠ…ΉΙ•Ή½Ω…Ρ₯½Έ)½˜•α₯ΝΡ₯Ήœ‰Υ₯±‘₯ΉΜ΅…δΙ•ΝձЁ₯Έ„)½΅Α±•Ρ”‘…Ή”½˜ΥΝ”°•œΈ™Ι½΄½™™₯•Μ)ΡΌ™±…Ρ́½Θέ…Ι•‘½ΥΝ”ΡΌ½™™₯•ΜΈ±Ρ‘½Υ )Ρ‘”™₯Ι”ΑΙ½Ρ•Ρ₯½ΈΝεΝΡ•΄΅…䁉”‘••΅•)ΡΌ‰”…ΑΑΙ½ΑΙ₯…Ρ”™½ΘΡ‘”™…‰Ι₯Œ½˜Ρ‘”)‰Υ₯±‘₯Ήœ°Ρ‘”™₯Ι”Ι₯ͭ́™½ΘΡ‘”ΥΝ”έ₯±°‘…Ω”)ΡΌ‰”Ι•…ΝΝ•ΝΝ•…ΉΡ‘”™₯Ι”ΑΙ½Ρ•Ρ₯½Έ)ΝεΝΡ•΄ΥΑΙ…‘•°•Ω•Έ₯˜Ρ‘”₯Ή‘₯Ω₯‘Υ…°)½΅Α½Ή•ΉΡ́…Ι”έ½Ι­₯Ήœ™₯Ή”Έ)Ёё”Ν…΅”Ρ₯΅”…́­••Α₯ΉœΥΐέ₯Ρ )Ρ‘”±…Ρ•ΝЁ₯Έ™₯Ι”ΑΙ½Ρ•Ρ₯½ΈΡ•‘Ή½±½δ)…ΉΝεΝΡ•΄‘•Ν₯Έ°•Ή₯Ή••Ί…Ή)₯ΉΝΡ…±±•ΊΉ••ΡΌ‰”…έ…Ι”½˜Ρ‘”΅½ΝΠ)½΅΅½Έ…Ύ͕½˜™…±Ν”…±…Ι΅Μ°…Ή)Ν½΅”½˜Ρ‘”Ι…ɕȁ½Ή•ΜΈQ‘₯́­Ή½έ±•‘”₯Μ)Ρ‘”™₯ΙΝЁΝΡ•ΐ₯Έ΅₯Ή₯΅₯Ν₯ΉœΡ‘”₯΅Α…Π½˜)™…±Ν”…±…Ι΅ΜΈ