Pdf comparison of available technologies for fire spots. The sensor cable consists of a twisted pair of 19 awg copper. If the sprinkler system is installed at too great a distance from the. Safecable is an easy to design, install, operate and maintain linear heat detection cable. Heat detectors are designed to sense a predescribed change in the physical or. Feb 22, 2018 the maximum listed spacing for each type of protectowire linear heat detector is as follows. Detectors chapter 2 and 3 in the essence of chromatography. Signaline heat linear heat detectors are specialist cables designed to sense heat or sudden increases in temperature anywhere along their entire length. Notifier manufactures ewis systems, occupant warning and speakers.
They are generally located at or near the ceiling of a building and are best suited for fire detection in small confined spaces where rapidly growing, high heat output fires may be expected. It is especially suitable for use in constricted spaces and under extreme environmental conditions. This linear cable can detect a fire anywhere along its entire length and is available in multiple temperatures. Unlike conventional detectors, the protectowire linear heat detector s unique form and construction make it the detector of choice for all types of installations. Visit for our full range of heat detection solutions.
Each detector is comprised of two special metallic alloy conductors individually insulated with a heat sensitive poly mer. Alarm bells are sounded when the prealarm signal is received and the deluge sprinklers are activated from the alarm signal. Linear heat detector wire ydk linear heat detection wire. Patol is the uk manufacturer of lhdc linear heat detection cable for heat sensing in transportation and manufacturing applications, exporting worldwide and with regional managers in the middle east and india. It is suitable for use in constricted spaces and under extreme environmental conditions. Factory mutual listed spacing for 155f and 190f rated types epc, epr, xcr, and xlt 30 feet 9. Patol is the uk manufacturer of lhdc linear heat detection cable for heat sensing in transportation and manufacturing applications, exporting worldwide and with regional managers in. Linear heat detector bosch security and safety systems. Linear heat detectors by protectowire can best be described as a continuous run of spot heat detectors within a versatile cable. Digital linear heat detection wire operation figure 1 thermocable digital linear heat detection wire is a combination of advanced polymer and digital technologies that can detect heat anywhere along its entire length. A mechanical fault can cause a build up in heat which can be sufficient to ignite a part of the machinery.
Linear heat detector are run on the sprinkler pipes to initiate a prealarm and alarm signal. Digital linear heat detector was invented and patented in pembroke, ma by gerald holmes of the protectowire company in 1938. Linear heat detection systems the zeta heat tracer system consists of a control module, and a special 4 core heat tracer cable. The fyreline analogue heat detector is a rugged, easy toinstall detection system, consisting of a control module and detection cable, that is designed to. Linear heat detection is ideal for areas that need broad coverage with limited cost. Description the pim530 operates using conventional initiating device circuit technology and contains an integrated onboard protectowire alarm point location meter.
Understanding digital linear heat detection international. The detector must be installed in continuous runs without taps or branches in accordance with applicable sections of nfpa 70. This simple but effective system can be combined with smoke detectors to deliver multipurpose systems. The two cores are separated by a polymer plastic, that is designed to melt at a specific temperature commonly 68 c for building applications 1, and without which causes the two cores to short. Based on the lios ots evaluation unit and an appropriate sensor cable the system fulfils the demands of modern fire detection technology. Linear heat detection lhd is a linetype form of fixed temperature heat detection used in common commercial and industrial environments. The pim530 initiating circuit is also compatible with other types of nonresistive normally open contact alarm initiating devices. Protectowire protectowire linear heat detector 2000m safe thermocable linear heat detector 5000m simplex 40989601ea photoelectric smoke detector 25 simplex 40989603ea ionisation smoke detector 31 simplex 40989618ea heat detector type a 31. Fire is usually caused by overheating of a fan motor. Lwm 1 is a linear heat detector for detecting fire.
System sensor fixed temperature linear heat sensing lhscable range consists of a twisted pair of extremely low resistance. An increase in temperature lowers the resistance of the insulation and this change is interpreted by an interface module which activates an alarm at a preset resistance level. Resistive type linear heat detectors a sensor whose conductors are covered with a negative temperature coefficient insulation material. Digital linear heat detector operation three conditions of digital linear heat detection current regulated by end of line resistor which flows through the detector loop to provide monitoring. Protectowire is both ul listed and fm approved for the past 70 years. The heat pad shall also be used as a test point at the end of each sensor cable zone. Protectowire protectowire linear heat detector 2000m safe thermocable linear heat detector 5000m simplex 40989601ea photoelectric smoke detector 25 simplex 40989603ea ionisation smoke detector 31 simplex 40989618ea heat detector type a 31 simplex 40989619ea heat detector type b 31 simplex 40989621ea heat detector type d 31. Protectowire the global leader in linear heat detection. Usable in constricted spaces and under extreme environmental conditions usable in exzones 1,2, 21, 22 resistant to mechanical and chemical influences, corrosion, humidity and dust usable for din en 545. Digital linear heat detection is comprised of two metal conductors, both individually insulated by heat sensitive polymers designed to soften at a. When used with the appropriate protectowire control equipment, the detector will activate a display, showing the location of. When used with a protectowire firesystem control panel, the detector will activate a display, showing the location of an over.
The insulated conductors are twisted together to impose a. Fcslwm1 is a linear heat detector for detecting fire. Also, if there is no access to the detectors after installation, a maintenancefree sensor would be desirable. Do not heat the sensor cable at selected points using a hot air blower. Protectowire linear heat detector provides the advantages of line coverage with point sensitivity.
The protectowire linear heat detector is approved as a heat. They are generally located at or near the ceiling of a building and are best suited for fire detection in small confined spaces where rapidly growing, highheat output fires may be expected. The detector must be installed in continuous runs without taps or branches in accordance with. Heat detectors linear heat detectors description the linear heat detectors are ideally suited to industrial high risk hazards as well as many types of commercial applications. Notifier also manufactures digital voice command for mass notification systems. On lengths of vertical racking less than 1m, used for carrying cables between horizontals, firesense2000 linear heat detection cable should be located across the top of the rising group of cables. Therefore, the detection of a fire spot via linear heat. Protectowire linear heat detectors are a proven, practical method of detecting overheat and fire in cooling towers. These polymers are chemically engineered to breakdown at specific fixed temperatures allowing the twisted conductors to make. Protectowire 220f and 280f types epc and xcr 25 feet 7. Lwm1 comprises a detector box with control unit and a sensor cable with four copper wires.
Digital linear heat detection digital linear heat detection cable is a conventional style heat detector, capable of detecting a fire along the length of the cable. Linear heat detector linear heat detectors automatic fire. Linear heat detection optimum safety in tunnels and. The maximum listed spacing for each type of protectowire linear heat detector is as follows. Designed for use in a wide variety of indoor and outdoor applications, lhd fire alarm cables are particularly suited for areas where installation or maintenance access is in a physically demanding or hazardous area. Wooden tower framework and plastic impregnated fiberglass supports and dividers fill are an everpresent combustible hazard. Whether its extreme environmental conditions, hazardous atmospheres, outdoor hazards, or simply aesthetics, protectowire can provide a solution for almost every fire detection. In the case of an open circuit, current flow stops and the monitoring device shows this as a trouble state. Pim530 series protectowire linear heat detector interface. Protectowire cti tm confirmed temperature initiation.
Unlike conventional detectors, the protectowire linear heat detectors unique form and construction make it the detector of choice for all types of installations. Oct 27, 2014 wherever a fire detection with conventional detectors is reaching its physical limits, the application field of the new line type heat detector adw 535 begins. Linear heat detection lhd has become an integral part of protecting people and property in structures such as storage facilities, tunnels, and subways. The lhs linear heat sensor is a flexible, durable and costeffective fixedtemperature fire detector, suitable for protecting a wide range of commercial and industrial fire applications. Digital linear heat detection fire protection technologies. Linear fire detection systems fire protection technologies. Linear heat detectors nfpa fire code issues engtips.
Contact us to discuss your linear heat detection needs. Linear heat cable versatile, economical heat detection. Protectowire linear heat detector is a proprietary cable that detects heat. Linear heat detectors have unique advantages over other types of detectors, especially when difficult installation factors or severe environmental conditions are present. Thermocable digital linear heat detection wire is a combination of advanced polymer and digital technologies that can detect heat anywhere along its entire length. Heatresponsive devices are either a linear heat or a spot heat detection type. They are designed to be used in commercial and industrial fire alarm systems where conventional heat detectors may be difficult to install, or may not be suitable. Designed for use in a wide variety of indoor and outdoor applications, lhd fire alarm cables are particularly suited for areas where installation or maintenance access is in a physically demanding or hazardous. Linear heat detector linear heat detectors automatic. The insulated conductors are twisted together to impose a spring. Lhd linear heat detection is a continuous heat detector capable of detecting heat anywhere along its length and is often described as a continuous chain of individual spot heat detectors. Signaline linear heat detection basics lgm products. Wherever a fire detection with conventional detectors is reaching its physical limits, the application field of the new line type heat detector adw 535 begins. Linear heat detection specification document 200907.
Compatible with other types of alarm initiating devices on the same circuit such as manual pull stations, thermal heat detec tors and smoke detectors. Alarmline ii linear heat detection lhd is a cable based temperature monitoring system which provides early detection of abnormal changes in the ambient. Pim530 series protectowire linear heat detector interface module f eatures provides a single zone interface for protectowire digital linear heat detectors capable of class a style d or class b style b monitoring of up to 6560 feet 2000 meters of protectowire linear heat detector integrated protectowire alarm point location meter with onscreen field calibration 64. A sensor cable heat pad shall be used in critical areas where greater lengths of sensor cable need to be concentrated into a compact area. Linear heat detection lhd cable is essentially a twocore cable terminated by an endofline resistor resistance varies with application. In this article, we will delve into the construction and operating principles of digital linear heat detection, applications and guidelines for fire protection engineers, the use of nfpa codes and standards as well as fm and ul guidelines. Protectowire is a normally open contact device and as such can be interfaced to intelligent fire alarm panels via system sensor monitor modules. Protectowire linear heat detector temperature ratings and model numbers protectowire linear heat detector is a proprietary cable that detects heat anywhere along its length. Linear heat detection cable linear heat detection lhd. Thermocable consists of a twisted pair of extremely low resistance. Linear heat detection cables lhdc are designed to provide an early warning detection of fire and overheating in applications where point detectors would not be viable due to inability to sustain the environment or through the costing element. The linear heat detector is a cable that detects heat at any point along its length.
Heat detectors heat detectors respond to the thermal energy of a fire. Linear heat detectors stookeyfpe specifierregulator 15 jul 10 18. Protectowire the global leader in linear heat detection systems. Linetype detectors can be installed in a relatively inconspicuous manner by taking advantage of ceiling designs and patterns. The sensor cable is comprised of two steel conductors individually insulated with a heat sensitive polymer. The firelaser system alleviates this issue by necessitating access for each linear heat zone, as opposed to each individual addressable detector. Linear heat detection has been around for almost 80 years but is still relatively unknown to many in the fire protection industry.
Notifier by honeywell is a manufacturer of fire protection products such as afp2800, afp3030 addressable fire alarm panels, smoke detectors and evacuation systems. Pim530 series protectowire linear heat detector interface module. Protectowire is a normally open contact device and as such can be interfaced to intelligent fire. Protectowire linear heat detector is approved as a heat actuated automatic fire detector and is intended to be used on a supervised initiating circuit of an approved fire protective signaling control unit. Heat responsive devices are either a linear heat or a spot heat detection type. The linear heat detection cable lhdc system from hochiki is designed to provide early detection of fire and overheating in circumstances where other forms of detection would not be viable, either due to inability to sustain the environmental requirements or through prohibitive costs. Linear heat detection cable lhdc is the obvious choice to provide early detection of fire conditions and overheating.
The cable has 4 cores, 2 are covered with negative temperature coefficient ntc material, the other 2 have normal pvc insulation. Linear heat detector short information en 5 bosch sicherheitssysteme gmbh product information f. It makes for an ideal heat detector due to its chemical resistance, ability to detect fire anywhere along its length, and cost effectiveness. The cable is available to purchase in two different types. The linear heat detection system provides detection using a heat sensing cable that is typically provided for cable trays, conveyors, freezers and rack storage. Get this information as a pdf what are linear heat detectors. The sensor cable is comprised of two steel conductors individually insulated with a heat. A wide variety of linear heat detector options are available to you, there are 67 suppliers who sells linear heat detector on, mainly. A grain dryer for example, is one application where a build up of husk can ignite, causing a fire and loss of product.
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