Bandweaver Fiber Optic Linear Fire Detection System
BANDWEAVER Fiber Optic Linear Fire Detection System
BANDWEAVER Linear Cable Type Fire Detection is a system which monitors temperature shifts with 1°C sensitivity which can be used in places where conventional cable type heat detectors are inadequate. This system has become almost a necessity in harsh environments such as highway and raidroad tunnels, factories, organized industrial sites, cable galleries, conveyor lines. With its high sensitive heat detection technology, 20km of length can be controlled with one control panel and immediate data can be integrated to SCADA systems via TCP/IP MODBUS output.
Fiber Optic Linear Fire Detection System and Sub Units:
Fire detection system will be installed with fiber optic linear fire detection cable.
This system will be comprised of fiber optic linear detection cable and its control unit which are specified below.
System working principle is based on heat detection with fiber optic linear fire detection cable. Measurement unit will calculate the temperature and alert if the alarm criteria below is met:
Measured temperature at point to be higher than set maximum value,
Measured temperature rate of rise at point to be higher than set value,
Measured temperature rate of rise at point to be higher than in neighboring points.
Detection system should also have the features and comply with features below:
System should be able to detect location with less than 1m and 1°C deviation in 5km range.
System should have false alarm rejection feature on temperature fluctuation.
System should be able to supervise line breakage. System should be able to continue working on line breakage without technical or safety problem.
Laser safety level should be Class 1M according to IEC EN 60185-1.
Laser generator power should be less than 25mW at 24VDC. Laser should not cause damage to human eye at line breakage.
Unplugging the connectors while control panel is energized should not cause damage to connectors or terminals and system should be able to continue working safely.
There will not be any cooling fans inside the control panel.
System Components:
Fiber Optic Linear Fire Detection Cable
Linear heat detection cable which will be installed on middle of tunnel ceiling, will be comprised of two indepeindent multimode 62,
5/125µm flame resistant and halogen free isolated fibers. Outer steath will be HDPE LSZH – 3,2mm and will be protected in 1,8mm steel tube.
Detection cable should be able to detect both hot gases (convection energy) and radiation energy.
Cable should be also resistant to electromagnetic, mechanical, atmospheric, corrosive and radioactive effects, temperature and pressure fluctuations.
Cable shall be in accordance with IEC 60332-3C.
Operation temperature should be between -40°C and +125°C.
Cable should be made of halogen free material.
Cable should be easily repairable.
Cable should be resistant to tunnel cleaning processes.
Fiber optic linear heat detection cable will be used as a fire sensor. Thus both cable and the controller unit should be certified to EN54-22.
Fiber Optic Linear Control Panel and Analyzing Unit
Analyzing unit measures the momentary temperature, rate of rise, maximum temperature and temperature differences of the fiber detection cable connected up to 20.000m continuously. Measurement and analysis method is carried out according to OTDR (Optical Time Domain Reflectometry) principle. Fiber Optic Linear Heat Control Panel will be able to detect deformation of light wave sent inside the fiber cable.
All electronic components should be in the analyzing central unit. All tests, adjustments and measurements should be able to be done in a single unit.
Analyzing unit will have a response time of 6 seconds maximum in 5km length and 4 seconds maximum in 2km length.
Analyzing unit should not have any type of fan or cooling unit. Device should not need a cooling unit while in operation.
Device should be able for 19” rack mount installation inside control room.
Analyzing unit’s operation temperature should be between 0 and +55°C.
Analyzing unit should carry out the functions below:
F/O linear fire detection system monitoring and control,
Creation of fire zones through software
Depending on the range of analyzing unit, designation of 500 or 250 programmable of fire zones,
Minimum 40 standard dry contact outputs to communicate with Scada or other electromechanical systems,
Ethernet connection feature,
Serial RS232/485 output,
TCP/IP Master output with reserve in order to communicate with Scada system,
Filter capability of natural temperature fluctuation,
Keeping the last 400 diagnostic information and last 100 events,
Detection of fire growth’s location,
Transmitting fire data to tunnel management system,
Device’s MTBF life should be 10 years at minimum. Device will be certified from LPCB or VdS to EN54-22. EN54-5 approved devices will not be accepted.
Interfaces
System should be able for programming, monitoring and usage through via a terminal or PC. System should have RJ45 ethernet connection capability.
Linear f/o fire detection cable should be dividable into 500 zones with 5000m range control panel and 250 zones with 2000m range control panel. Alarm threshold should be decidable zone wise and a minimum of 40 dry contact outputs should be programmable for monitoring in other electromechanical systems.