1 / 24

Linear Heat Detection

Linear Heat Detection. Temperature Related Risk Protection. Data supplied by fire insurance companies indicates that most industrial fires are caused by - Friction heat & sparks - Overheating of equipment - Spontaneous combustion - Oil & oil fired equipment. What is Linear Heat Detection?.

colleen-lopez
Download Presentation

Linear Heat Detection

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Linear Heat Detection

  2. Temperature Related Risk Protection • Data supplied by fire insurance companies indicates that most industrial fires are caused by - Friction heat & sparks- Overheating of equipment - Spontaneous combustion- Oil & oil fired equipment

  3. What is Linear Heat Detection? • Continuous heat detector in the form of a cable- Alarmline Analogue: averaging heat detector- Alarmline Digital: fixed temperature heat detector

  4. Analogue LHD Cable • Definition: - Multi-conductor cable containing insulators whose resistance varies proportionately to changes in temperature - Re-settable provided temperature does not exceed burn-off point of PVC coating - Alarm level adjusted via controller

  5. Alarmline Analogue LHD Cables • High resistance - standard applications • Nylon extruded - chemical resistance • Bronze braided - increased mechanical protection over standard blue • Stainless Steel braided over nylonextrusion - offshore applications

  6. LHD 4 Controller K82012 K82194

  7. LHD 4 Controller • Features - Alarm level adjusted via moveable link - Open circuit and closed circuit fault monitoring - Fire and fault output to conventional fire alarm panels - Volt-free relay option for analogue addressable fire alarm panels - Eurocard 19” rack option

  8. AlarmlineNomogram - Select the sensor cable length being used (D)100m - Mark the Max Temperature where an alarm must not be given (B) 45 degrees - Draw a line from point on “D” through point on “B” to the switch setting line (A). This is the switch setting that will not give a false alarm at the Max ambient temperature

  9. AlarmlineNomogram -In the event of a hot spot occuring, it can be shown how hot this would need to be to give an alarm for a given length - 10 metre length = 83 degrees - 1 metre length =120 degrees

  10. Digital LHD Cable • Definition: - A cable which contains an insulator which melts at a specific temperature - Switch output provided once alarm temperature reached - Not re-settable

  11. Alarmline Digital LHD Cables • Polythene braid 70º C • Nylon over sheath 70º C • Polythene braid 90º C • Nylon over sheath 90º C • PVC 113º C • PVC 180º C • Fluoropolymer 238º C

  12. Alarmline Digital Control Units • Firebeta 2 to 12 zone conventional panel with optional extinguishant release module • Any other conventional fire alarm panel and/or extinguishant release module (retrofit)

  13. Alarmline LHD - Advantages • Flexible - Mechanically - Electrically • Durable - Wide range of casings / braiding - Operating range -65º to +200º C - Unaffected by operating environment

  14. Alarmline Analogue Alarmline Digital Digital Non-recoverable Open circuit fault detection Min Operating Temp -65° C Min Alarm temp 61° C Max Alarm Temp 238° C N/A Max length 10,000m Analogue Recoverable Open & short circuit fault detection Min Operating Temp -65° C Min Alarm Temp 35° C Max Alarm Temp 105° C Max recoverable Alarm Temp 150° C Max length 1000m Analogue & Digital Properties

  15. Edge clip ‘V’ Clip Sensor cable Sensor cable Neoprene sleeve Neoprene sleeve Cable tie Sensor Clips

  16. Applications • Heavy industry • Warehousing / storage tanks • Conveyors and escalators • Cable trays • Floor & ceiling voids • Tunnels • Car parks

  17. Applications - Case Study 1 • Electricity generation - Cable trays and risers - Boiler fronts - Conveyors - Cooling towers - Transformers

  18. Applications - Case Study 2 • Warehousing and bulk storage - Alarmline Digital cable with conventional control unit or - Alarmline Analogue high resistance / Nylon extruded cable with LHD 4 controller - Fixing clips as required - “T” Clips - Edge connectors - Cable tray fixings

  19. Sensor Cable Racking

  20. Sensor supports Power cables Sensor cable Traywork width 600mm maximum Trays

  21. Applications - Case Study 3 • Conveyors and escalators - Alarmline Analogue bronze braided cable - Sensor Pads Bronze Braided - Series 4 LHD Control Unit - Alarmline Digital Cable - Conventional control unit - Clips & Brackets to match site requirements

  22. Conveyor Belt Heat sensing cable Idle rollers Conveyor return Conveyor

  23. LHD Bronze Braided sensor cable Sensor Pad Escalators

  24. Alarmline (Analogue) Alarmline (Digital) UK power generation - 5117 P 11 - EPA 022/215 Factory Mutual - OB 9A2.AY - OR 5A4.AY Chinese Fire Officers - MAAL 96652 Chinese Power Generation - NSTCFEPQ (Appr) 92005 German VdS (1995) UK power Generation - EPA 019-021 - EPA 206/220 Factory Mutual - OD 6A9.AY - 300 5155 - 300 3834 Chinese Fire Officers - MAAL 96652 - 300 8312 - 300 8933 International Approvals

More Related