Understanding digital linear heat detection international. Linear heat detection is highly costeffective and can be easily installed with, or in place of, conventional heat detectors where traditional style detection may be difficult to install or maintain or is too expensive. Protectowire linear heat detector provides the advantages of line coverage with point sensitivity. 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.
The cable is comprised of two zinccoated spring steel conductors, individually coated with a heat sensitive thermoplastic polymer engineered to melt at fixed temperatures. Linear heat detector short information en 5 bosch sicherheitssysteme gmbh product information f. As a highly effective and reliable fire detection method, line type heat. Protectowire is a normally open contact device and as such can be interfaced to intelligent fire. Linear heat detection system heat detection products. Linear heat detection cable lhd for fire detection is provided of two twisted steel conductors, covered by a heat sensitive polymer. Therefore, the detection of a fire spot via linear heat sensing cables is utilized. Pertronic industries linear heat detection cable lhd is designed for use where traditional point heat detectors are unsuitable. The heat pad shall also be used as a test point at the end of each sensor cable zone. Linear heat detection lhd also known as linear detection wire or linear heat detection cable or linear heat is a very commonly used method of fire detection. It can detect a fire anywhere along the length of the cable, and can be of lengths in excess of a kilometer. The distance in meters is then displayed on the 4 digit lcd. Capabilities include meeting any fire defense need from hazardous area detection to auxiliary equipment shutdown and.
Overview approvals the fyreline analogue control modules and pvc coated linear heat detection cables are fully approved by the. Heat responsive devices are either a linear heat or a spot heat detection type. The system consists of type pfs fiber optic sensor cable and the pts controllers with related software. These ensure your business the fire safety it needs. Although linear heat systems cannot detect small, smoldering fires, it can be very beneficial for certain applications, such as refrigerated storage. Linear heat detection cable lhd for fire detection is provided of two twisted steel conductors, covered by a heatsensitive polymer. Kidde alarmline linear heat detection lhd is a cable based system that provides. A mechanical fault can cause a build up in heat which can be sufficient to ignite a part of the machinery. 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. Digital linear heat detection fire protection technologies. The fyreline analogue heat detector is a rugged, easy toinstall detection system, consisting of a control module and detection cable, that is designed to.
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. Page 3 contact kidde airsense home contents zoom print exit kidde alarmline linear heat detection lhd is a cable based system that provides economical temperature monitoring at the. System sensor fixed temperature linear heat sensing lhscable range consists of a twisted pair of extremely low resistance. Contact us to discuss your linear heat detection needs. Linear heat detector bosch security and safety systems.
It is especially suitable for use in constricted spaces and under extreme environmental conditions. Has been designed for use as a linear heat detection system using stateoftheart fiber optic sensing technology. Th series linear heat detection description the th series digital linear temperature sensing cable is manufactured as 2 twisted and tensioned tin plated copper coated steel conductors. Pim530 series protectowire linear heat detector interface. The contractor shall have been in the business of installing linear heat detection, alarm, and control systems for at least two years and shall provide. Alarmline ii linear heat detection lhd is a cable based temperature monitoring system which provides early detection of abnormal changes in the ambient. Linear heat detection lhd is a linetype form of fixed temperature heat detection used in common commercial and industrial environments. Nittan reserves the right to make changes at any time without notice in prices, colours, materials. Each conductor is then extruded with a temperature sensitive polymer before the application of an outer sheath of flame retardant high temperature material. Providing detection and location along the complete length of the lhd cable. Any other conventional fire alarm panel andor extinguishant release module retrofit. Safecable is an easy to design, install, operate and maintain linear heat detection cable.
It makes for an ideal heat detector due to its chemical resistance, ability to detect fire anywhere along its length, and cost effectiveness. I have been a protectowire distributor for 25 years. Linear heat detection thermocable is easy to design, install, operate, and maintain. Protectowire linear heat detector is a simple costeffective form of fire detection in floating roof fuel storage tanks. Never place the detection wire where it can be damaged by foot, equipment, or truck traffic. The pts series controllers can be configured for various alarm criteria and can be connected to an approved fire alarm control. Pim530 series protectowire linear heat detector interface module. Linear heat detection is ideal for areas that need broad coverage with limited cost. Traceline selfadaptive compensation line type heat detector. The detector, when used with a protectowire intrinsically safe control panel, provides early warning of lightningcaused fires in the seal area of tanks. Patol ltd fire detection solutions subject from patol fire detection solutions.
Firesense2000 linear heat detection cables should in general be spaced on the ceiling above the area to be monitored such that the cable is between 0. Linear heat detection specification document 200907. Safe fire detections products have been leading the early warning fire detection ewfd market since 1972, protecting loss from fire, smoke, heat and water. Alarmline ii analogue linear heat sensor cable technical. Linear heat detection patol linear heat and infrared. Alarmline ii analogue linear heat sensor cable technical manual. Protectowire the global leader in linear heat detection. Safe fire detections new linear heat detection lhd wire, thermocable is a heat detector, not a system, and must interface with an approved fire alarm. Pdf comparison of available technologies for fire spots. Cable tunnels and cable trays linear heat detection using dts technology firelaser distributed temperature sensing dts technology has been extensively used as an effective linear heat detection system to protect cable trays and cable tunnels. Fibre optic linear heat detection applie d to tunnels chris conway sensa. The design and installation of an alarmline ii analogue linear heat detection system is unique to every site and application, therefore it is recommended that this work is only undertaken by trained and competent persons following the guidelines in this manual.
With a range of up to 10 km and a sampling interval down to 25 cm, the system is ideal for fire detection in tunnels and metros as well as large facilities like warehouses and industrial facilities. Firesense linear heat detection lhd is a cable based system that provides economical temperature monitoring at the precise point of risk. Linear heat detection cable description linear heat detection lhd cable is a combination of advanced polymer and digital technologies that can. Linear heat detection system page 5 10162000 owners designated representative, proficiency in installing fire detection, alarm, and control systems for at least five years.
Capabilities include meeting any fire defense need from hazardous area detection to auxiliary equipment shutdown and automatic extinguishing. Linear heat cable versatile, economical heat detection. These polymers are chemically engineered to breakdown at specific fixed temperatures allowing the twisted conductors to make. Applications can range from building fire alarm systems to mobile plant machinery.
Its inherent flexibility makes it possible for the linear heat detection sensor to be attached to the rim seal roof support structure. Linear heat detectors by protectowire can best be described as a continuous run of spot heat detectors within a versatile cable. With the ability to monitor up to 10,000m for both fire and fault conditions the dli enhances any. Heatresponsive devices are either a linear heat or a spot heat detection type. If the temperature surrounding the cable reaches the activation temperature the two cores quickly come into contact and trigger an alarm. When the programmed temperature is reached, this polymer layer gets broken, making the two conductors contact each other, causing an alarm. Linear heat detection lhd linesense fire detection ltd. This linear cable can detect a fire anywhere along its entire length and is available in multiple temperatures. Never stretch the detection wire, always allow some slack in the runs especially in refrigerated storage applications.
Throughout this time i have always found protectowire products to be best in class. Never store detection wire in areas where the ambient temperature is near, or exceeds the activation temperature of the wire. 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. 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. Pdf it is very demanding to detect fire spots under difficult conditions with high. In the case of an open circuit, current flow stops and the monitoring device shows this as a trouble state. Up to 10,000 feet 3,000m of thermocable can be used on every zone of any approved conventional panel, and every contact monitor module of any approved addressable panel. Linear heat detection lhd cable and when activated identi. Below you will see a typical system, highlighting the easy to use thermocable components. Intelligent linear heat detection systems application guide hubspot. Our new product line, thermocable, is revolutionizing linear heat detection by implementing advanced polymer and digital technologies into an already proved method of detection. Protectowire is a normally open contact device and as such can be interfaced to intelligent fire alarm panels via system sensor monitor modules. 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 has been around for almost 80 years but is still relatively unknown to many in the fire protection industry.
Introduction this paper describes fiber optic linear heat detection technology and its advantages as an intelligent temperature profiling system for tunnels. The linear heat detection system provides detection using a heat sensing cable that is typically provided for cable trays, conveyors, freezers and rack storage. Linesense supply h8040n, h8045n, h8028, h8069 and h9650 linear heat detection cables. Linear heat detection lhd has become an integral part of protecting people and property in structures such as storage facilities, tunnels, and subways. A grain dryer for example, is one application where a build up of husk can ignite, causing a fire and loss of product. 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. The proreact range of digital linear heat detection cables is designed to trigger a response when a specific temperature is reached. Fyreline digital linear heat detection cable uses fixed temperature detection technology to provide early warning of fire or overheating equipment.
Linear heat detection cable lhdc is the obvious choice to provide early detection of fire conditions and overheating. Location and display of the linear distance in metres of overheating or alarm point. Protectowire linear heat detector is a component of a complete family of systems manufactured by the protectowire company a leader in fire detection for over sixty years. Kidde provides two choices of linear heat detectors. Linear heat detection cable is a combination of advanced polymer and digital technologies that can detect heat conditions anywhere along the length of the cable.
Tect is a robust linear heat detection system based on optical fibers. These are two distinct applications within this environment. 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.