How the linear thermal detector works. Linear fire detectors. Linear thermal fire detectors
In view of the extension of production using expensive equipment and increasing the number of technological staff at enterprises, it is often necessary to take care of the safety of people and technological equipment. Currently, in connection with the tightening of the rules of the security systems, it is often necessary to think about the use of one or another kind of systems.
This article will consider an innovative solution in the field of fire safety - a device represented as a cable.
Linear fire detector, another name of the thermocabel - the device capable of detecting the temperature change, on the site of which it is laid, in cases where it is impossible to establish another kind of fire detectors.
The linear fire detector is a pair of conductors of isolated interim sensitive insulation, clad into an additional protective insulating layer.
Operating principle.
The principle of operation consists in the following when a fire or overheating appears on the site where the thermocabel is used, the insulating layer of each conductor is disrupted under the action of the threshold temperature, while the conductors are closed on a separate or several sections. The control device decides to change the status on the control object.
Classification of the thermocabel by the types of used external insulation,
which significantly affects the application of the detector in specific conditions ambient:
- The thermocabel type EPC, the insulation of which is considered the most universal insulation made of PVC materialthat allows it to apply it in industrial and civil construction. The shell provides good flexibility when laying the cable at reduced temperatures. It provides adequate fire resistance and moisture resistance.
- EPR type thermocabel has a polypropylene outer sheath significantly increases fire resistance and does not distribute influence ultraviolet radiation Environment. As a rule, used in media with aggressive chemicals is not subject to abrasion. At the same time, reliably functions in conditions of elevated ambient temperatures.
- The thermocabel type XLT, the insulation of which is an insulating material from the polymer with the highest way capable of resisting extremely low temperatures. The main purpose of this kind of isolation is the use of a detector in open areas, in the conditions of the Far North, in refrigeration and freezer chambers.
- TRI type thermocabel has an isolation of the EPC type, but the only unique difference from the remaining cable TRI cable (Tri-Wire) is capable of issuing two "predominium" signals and "fire", depending on the installation.
- The thermocabel type XCR in the literal sense of the word includes all the above types of shells. High-quality fluoropolymer sheath specially designed for objects special purpose, with reduced chimping and gas formation, mechanically resistant to abrasion, with high resistance to reduced temperatures. Also, as well as the EPR shell, stealing the aggressive effects of chemically active substances and ultraviolet exposure. And the ability to use under reduced temperatures allows you to make similarities with an XLT detector. The quality of the shell allows you to emphasize the versatility of the insulation material used.
Classification of thermokabel under the operating conditions
consider below the following figure, which will clearly demonstrate the ability to use one or another isolation in various environmental conditions.
Classification of thermocabel in temperature modes.
In the figure you can see the cable model and the corresponding response temperature, in the operating temperature range.
The advantage of using a linear fire detector:
The thermocacabel has increased sensitivity on temperature changes at its entire length;
The presence of several temperature modes of operation due to the manufacture of devices of different types manufacturing;
Resistance to environmental conditions;
High resistance to low temperature environmental modes;
Low cost I. simple solutions On the installation of the system, the reduced cost of operating costs.
Principles of building system:
Work is based on the principle of working with normally open contacts, so the control device must have a feature of the circuit control of $
It is necessary to take into account the fact that when choosing this detector, it is necessary to take into account its internally resistance due to the long thermocabel, 1 ohms by 1.5 m, which later may affect the length of the thermocabel line on a given area;
When this system is selected on the protected area, it is necessary to be guided by the calculation of the possible resistance of the thermocabyl and evenly distribute the total length on the site into several uniform areas, otherwise the cable section of more than 2000 m can lead to a false response system;
Installation It is necessary to produce a solid plot, not allowing branching, to produce division into zones that are determined by the definition of a fire source in a particular place;
When planning a cable laying, take into account the norms and requirements for the cable laying.
Next will be considered the mounting devices that are used in systems. fire alarm With the use of a linear fire detector, based on the equipment supplied by the company RROTectowire, approved by VNIIPO EMERCOM of Russia.
Mounting components.
Mounting ZB-4-QC-MP mountingsealed connection of a linear detector and a loop of communication. The execution of the box makes it possible to ensure reliable protection of the connecting node from the external environmental impacts, it helps to ensure a qualitative connection in wide range of operating temperatures.
An example of the application The following in the figure shows that contact connectors enclosed inside the box with such use make it possible to adequately connect the thermocabel and the communication loop, as well as additional resistance, ensuring its integrity.
Crimp Coupling SR-502
its main purpose is to ensure a cable input to the ZB-4-QC-MP mounting zone. Set of steel elements and sealing ringsIt allows you to get a reliable hermetic connection with a cable and a box, while not damaging the thermo-sensitive cable cable.
Fasteners.
Designed for quick, reliable and at the same time safe mount Mounting elements allow you to gradually pull the cable in the process, while ensuring the integrity of the thermocabel.
The fastening elements presented below allow without additional stretching and squeezing the insulation of the cable to perform installation.
Waw clamp 
the appearance of the device allows you to download and reliable fastenings The detector-cable to the surfaces by which it will be laid. The principle of use is that in the inside of the clamp, the material of which, depending on the laying conditions, two types can be applied, the cable is placed and its clamp is placed without pressure on the outer shell.
By type of material used, the clamp can be of two types of nylon (WAW-N) and from polypropylene (WAW-P). Polypropylene clamps are applicable when used in mediums with high temperatures, and nylon in low-temperature media to -40 ° C, and + 88 ° C, respectively, for polypropylene.
There is no features of installation on direct areas, but in the corners there is a shift point of the fastener installation point inside the cable bend by 1.3-2 cm on the intersection of the cable lines, after fixing on direct sections.
Also for direct sites are applicable and more primitive mounting of type OHS.
Linear OHS clamps 
it is used to fasten the linear fire detector in direct areas, as recommended by the manufacturer, between the clamps of the WAW type, while ensuring the main support for the detector.
The clamp of type OHS-1 is made of galvanized steel, which justifies its use to use indoors, and the OHS-1/4-SS clamp is made of steel, which justifies its use for use on external installations.
Clamp fixation is carried out in essence. fastening (bolt, screw, hairpin, etc.).
The considered mounting fasteners make it possible to make the thermocabel fastening on the plane, but usually when installation work It is not always possible to produce work only on the plane, or there is no possibility to install a clamp on it, we have to swing the detector to the construction structure, where it will not be possible to fasten the ones or other considerations discussed earlier by methods, resort to the use of clamps that are no additional disorders. Construction mixture will allow the cable laying.
BC Series Clips Set 
apply to the laying of the detector to building structures, without disturbing its integrity, and reasonable use of labor costs and installation time. Find applications when installing thermocabel on cables, organized in trays, for metal structures, fache des's design elements, etc.
The principle of attachment is that the clamp of type BC is fixed to the design, and the thermocabel is already fixed to it through the WAW clamp.
At the place of use of the clamp, two types of clamps differ.
Clamp BC-2, material steel, applied to laying the thermocabel indoor. 
The BC-3 clamp, galvanized steel, is used for the installation of the thermocabel on the outer structures. 
Mounted adhesive type 
in cases where it is not permissible to produce mechanical fastening, but temperature conditions and environmental conditions allow without special requirements The material is used to fastener consisting of a mounting site and a cable screed, which is glued to specialized, industrial glue, which ensures the speed of installation and ease of work.
To ensure the displacement of the thermokabel relative to the mounting point is used L-shaped RMC fastener bracket. L-Holder, at the end of which the WAW clamp or push-button latch has five holes to regulate the displacement distance. As well as all the elements of the fastener, the holder is performed either from sheet steel, or stainless steel, which ensures its possibility of applying both inside and outside the room.
CC-2 mounting clamps. 
They are a composite system of fastening elements, which allows you to quickly and conveniently install a linear fire detector along the cable tray with a direct mount to the tray. A typical clamp "Caddy" has a specific bending on one of the edges, which allows when clinging to the edge of the cable tray and hold it to hold it when hanging on the other from its edge of the thermocabel, fixed by fastener with a tag or clamp type WWW.
The manufacturer for these purposes produces two modifications of clamps for tray 1.6-4.0 mm thick and a thickness of 4.0-6.0 mm thick, CC-2N and CC-2W models, respectively.
When using another clamp of the "Caddy" clamp, it is possible to make the attachment to thicker cable tray elements in the same way.
CC-10 mounting clips. 
Similar on the principle of working with CC-2 clamps. Additionally, in addition to the previously said, this clamping type has the possibility of additional mechanical impact for fastening the clamp to the tray, when using a bolted connection, in this case the clamp is recommended for mounting the linear fire detector in places of vibration.
Fasteners modifications are represented by two species:
CC-10N are used for wall thickness trays 3.2 - 6.4 mm;
CC-10W are used for wall thickness trays 7.9 - 12.7 mm. 
Less complicated, but also the functional method of fastening the thermocabel can be possible in the presence of such products.
Mounting clamp HPC-2. 
Resistant to UV radiation of the environment and having a bracket, which allows the tap of the fastening lock to the material with a thickness of 1.5 - 6.4 mm, this clamp will allow without additional labor costs to install a linear fire detector. The thermocabel is embedded in the clamp, which is attached to the appropriate design. Material - nylon. 
So simple method Mounts It is possible to install the thermocabel using clamps.
Clamps PM-3. 
When laying a linear fire detector along sprinkler fire extinguishing systems, a solution was required to solve the thermocabel suspension to the pipe highway, for which such hotuces were introduced.
The system of clamp in the clamp allows one clamp to make fastenings of the fastener elementAnd the second is attracted by the thermokabel, while there is no contact of the detector with a pipe, and the most important thing is not dragging the place of the cable compression, while the inner insulating layer lives. 
Nylon clamps are operated at temperatures from -40 ° C and up to +85 ° C, while the installation temperature is short to be below 0 ° C.
All of the above in one way or another refers to one installation method. Next, we will consider the laying method on the string when using the carrier cable.
N.este-oS. 
An exclusive way to supply a linear fire detector is that the carrier cable is already integrated into the detector. Stainless steel threads are located directly under one outer felling. The cable wures the thread with a period of 0.3 m. The cores give the cable an additional rigidity, which will allow you to apply it in places where it is not possible to make fasteners in the usual way. 
The installation method is extremely clear, lies in the fact that the ends on the direct portion of the fire detector are attached to fixed parts or brushes and with the help of talrepa produce stretch.
The length of such a plot should not exceed 76 m, otherwise the cable breaks. 
Also, to prevent the thermocabel break, over the site of using a linear fire detector, you set supporting elements. The frequency of use of such elements is determined by the operating conditions, which shows the practice of external use. It is recommended to use the element more often to apply in order to ensure support and distribution of the load, from the land, the snow load on the entire length of the thermocabel.
When buying a 5000 m linear detector IP-104 / ILTT PRORACT DIGITAL TN
module Thermocabel_Mip2y as a gift!
Linear thermal fire detector
The SPEE "Thermocabel" includes:
Module Interface fireman "Thermocabel_ MP2I" with an indication of the exact location of ignition with the function of connecting two loops of the linear thermal fire detector IP-104 PRORACT DIGITAL TH (hereinafter the module and / or abbreviation of the MP2I).
Module Interface Fire Fire "Thermocabel" MIP2I works in conjunction with a linear thermal fire detector IP-104 / ILTT PRORACT DIGITAL TN and THERMOCABLE PRORACT DIGITAL.
Module Interface fireman "Thermocabel" MP2I is not intended to work with a linear thermal fire detector with a coating of more than 100Ω / km on one conductor.
The main features of the MP2I module:
· The connection of two loops of the linear heat fire is notified
· Two operating modes: independent and two-step
· Independent mode provides independent control over the work, each linear thermal fire detector connected to the MP2I, which allows the device to be connected, as similar to the characteristics of linear thermal fire detectors (one sensitivity temperature, in the shell of one species) and linear thermal fire detectors with different characteristics . (Different sensitivity temperatures and different shells). With this mode of operation, in the case of ignition of one of the loops, the device will give a "fire" signal and will determine the distance to the fire focus.
· Two-threshold mode provides joint control of two zones of linear thermal fire detector with the possibility of issuing a preliminary signal on fire and a fire signal. In this mode, the "Fire" signal is fed only when two loops of the thermal fire detector connected to the MP2A are triggered simultaneously.
Fire Notice Transmission Speaps "Thermocabel" is designed to determine the point of fire along the entire length of the sensitive element (linear heat fire is notified) with the definition of the exact location of the ignition and notifying the ignition by feeding the sound signal, as well as transmitting textual notification to the distance to the place of fire in meters on LCD displays.
The advantages of thermocabel
- Low price in rubles For a fixed price list.
- Two connect options: one or two loops
- Maximum loop length - 3000 m usinginterface module
- Is an analogue replacement of all those represented on russian market thermal linear fire detectors.
- Compatible with any fire alarm panel.
- Guaranteed sensitivity over the entire length of the cable.
- The minimum bending radius is reduced to 50 mm
- Sensitivity range from +68, +78, +88,+105,+185 Degree S.
- Shell: PVC, nylon, polypropylene I. steel braid.
- Used in medium with aggressive factors.
- Protection against UV rays in external use
- Safety from mechanical damage
- Protection from posting
- Increased level of anti-chemical protection and protection in alkaline environments
Composition of the system
Module Interface fireman "Thermocabel_ MP2I" with an indication of the exact location of ignition with the function of connecting two loops of the linear thermal fire detector IP-104 PRORACT DIGITAL TH (hereinafter the module and / or abbreviation of the MP2I).
Supports Modbus Protocol
LCD display with indication
Two options for connecting a linear thermal fire detector: directly to MP2 and connecting through a leading-connecting cable, which reduces the number of linear thermal fire detector, as well as install the MIP2I in any convenient place. Calibration of the connecting cable is carried out in automatic mode when the system is first setting.
Control of malfunction (error) of the linear thermal fire is notified.
The ability to connect one loop of a linear thermal fire detector.
Linear thermal fire detector IP-104 / ILTT PRORACT DIGITAL TN
The length of one loop to 3000 m ·
Turning temperature: + 68C, + 78C, + 88C, + 105С, + 185С
Shells: PVC, nylon (for outdoor use, resistant to aggressive media), polypropylene (resistant to aggressive media), steel braid (protects the linear thermal fire detector from mechanical damage)
Street applications
Sustainable to aggressive environments
Sustainable mechanical damage
Does not require maintenance
Long term operation up to 25 years
TN-1000 mounting box
Specifications
|
Properties |
IP-104 / ILTT PRORACT DIGITAL TN |
| Sensitivity | + 68ºС +78 ºС +88 ºС +105 ºС +185 ºС |
| The value of the electrical strength of isolation | 1000V. |
| Protection from posting |
Confirmed by laboratory tests |
| Shell | PVC, nylon, polypropylene, stainless steel braid |
| Technology | Twisted pair of trimetallic conductors (steel with copper and tin coating). Copper spray provides high electrical conductivity. Coating from tin-additional protection against corrosion |
| Length loop | 3000 m using the interface module ~ 190 Ω / km Resistance is reduced due to the innovative technology of trimetallic conductors, which made it possible to increase the length of the loop. |
| Connection | For direct to the fire alarm panel or through an interface module. |
| The accuracy of the detection of the focus | two times higher than that of a conventional linear thermal emitter |
| External diameter | 3,6mm +/- 0.12mm - 4.5mm +/- 0.12mm |
| Weight | 1000 m. - 20 kg |
| Radius of bend | 50 mm |
| Operating range | from -60 ° C to + 125 ° C. Confirmed by the official documentation of the manufacturer. |
| Distribution rate | 165 000 km / h |
| Interface module | MP2I |
| Installation | according to the instructions, the fastening step is 1.5-3 m confirmed by the manufacturer. |
| Certificates | Russian certificate of conformity |
| Warehouse reserve | in Moscow |
Application area
A typical solution for the use of thermocabel is a room with a large area or high pullback, as well as hard-to-reach areas that require one hundred percent coating and protection, extended areas, zones with an aggressive medium. The thermal detector is resistant to the effects of dust, humidity, chemical reagents, high and low temperatures, can be used on explosive areas, easy to cover, does not require maintenance. Service life - at least 30 years.
Connection scheme
Linear thermal detector (thermocabel) manufactured by Protectowire (USA) It is a cable that allows you to detect the source of overheating anywhere throughout its entire. The thermocabel is a single continuous sensor and applies in cases where operating conditions do not allow installation and use ordinary sensors, and in conditions of increased explosion storage conditions, the use of thermocabel is the best solution.
The linear thermal detector Protectowire consists of two steel conductors, each of which has an insulating coating from a heat-sensitive polymer. Conductors with an insulating coating are twisted to create a mechanical voltage between them, then coated with a protective sheath and placed in a braid for insulation from the effects of adverse environmental conditions.
The principle of the action of thermokabel
The principle of the thermocabel operation: when the threshold temperature is reached, under the action of the pressure of the conductors, the insulating coating of the heat-sensitive polymer occurs, allowing the conductors to enter into contact with each other. This happens in the first overheating point on the thermocabel highway. To trigger the signal, it is not necessary to wait for the heating of a plot having a certain length. The ProtectoWire Thermocabel is a maximum thermal detector and therefore allows you to generate alarm when the temperature threshold is reached at any point along the entire length of the cable.
Specifications of the thermocabel protectowire:
- High sensitivity all over
- Four Temperature Range
- High resistance to humidity, dust, low temperatures and chemical reagents
- indispensable in explosive zones
- easy to install and adjust
- economical, no expenses for use
- If you need to expand, simply added to the system
- Does not require maintenance. Expected service life for more than 25 years
Currently, there are several types of ProtectoWire thermokabel, differing from each other with a model type and material from which an external protective braid is made for use in a wide variety of environmental conditions.
Criteria for selecting a thermocabel model for various temperature ranges:
| Temperature range: | ||||
| Main | Intermediate | Tall | Ultrahigh | |
| Treatment temperature: | 68.3 ° C. | 87.8 ° C. | 137.8 ° C. | 180 ° C. |
| Minimum ambient temperature: | -44 ° C. | |||
| Maximum ambient temperature: | up to 37.8 ° C | up to 65.6 ° C | Up to 93.3 ° C | up to 105.0 ° C |
| Standard, multipurpose: | PHSC-155-EPC | PHSC-190-EPC | PHSC-280-EPC | PHSC-356-EPC |
| Abrasively and chemically resistant: | PHSC-155-EPR | PHSC-190-EPR | PHSC-280-EPR | PHSC-356-EPR |
| Combined, Two response temperatures: |
PHSC-68/93-TRI: Low temperature of the prestorms 68.3 ° C; High temperature prestorms 93.3 ° C |
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| Special, For low temperatures up to - 57 ° C: |
PHSC-135-XLT: Maximum set ambient temperature up to 37.8 ° C; Turning temperature 57 ° C |
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The main areas of applying the thermokabel Protectowire:
ProtectowIire thermocabel is used as a fire detector in fire alarm systems and fire protection. The use of thermocabel is optimally and efficient in various hard-to-reach, dangerous, industrial zones. Buy thermocabel You can in our company.
Objects for which the use of the thermocabel is recommended:
cable tracks;
tunnels;
warehouses;
power plants;
escalators;
elevators;
open storage racks;
conveyor transporters;
elevator shafts;
garbage generations;
Dust collectors;
staircases;
Bridges and poulys;
aircraft hangars;
Other objects in oil and gas, coal mining, steel and transport and explosive industries.
The thermocabel is easily added to any automatic fire alarm system. To do this, you must have a control device with the inputs of the type "dry contact". Thermocabel has a Russian fire safety certificate and its application on the territory Russian Federation The NPB 88-01 is regulated.
The detector fire linear thermal (thermocabel) is needed to search for a source overheating, along the entire length of the chain. T-SERB.68 ° С (A3), T-Rab. -60 ... + 46 ° C, D-ext.4 mm, red, fluoropolymer
Detector thermal linear thermocabel IPTT 68/155 XCR:
The principle of the thermocabel operation is to melt the insulating layer under the action of high temperatures, with further closures lived. The peculiarity of the thermokabel is to fix the heat load on any section of the chain, which allows you to give an alarm when it reaches a certain temperature anywhere in the cable, without waiting for its heating throughout the length.
The XCR series thermocabel has a shell of increased strength from such material as a fluoropolymer. This shell highlights significantly less smoke and gas, which makes the XCR series detectors more suitable on facilities with increased environmental requirements.
- Performance temperature: + 68 ° C;
- Maximum length of the plume: 1220 meters ";
- Operating temperature range: -40 ° C ... + 46 ° C;
- Continuous thermocabel action;
- Can be used where difficulties arise with the installation of classical fire detectors;
- Can be used on explosive objects;
- Has a fire-resistant and moisture-resistant shell;
- Gives an alarm signal when a certain temperature is reached
A wide range of devices allows you to make a choice of model for any request and functionality. A large selection will delight companies engaged in the installation of fire systems and security alarm And their customers.
Specifications of the ILTT 68 155 XCR
| Name of parameter | The value of the parameter |
| Treatment temperature | + 68 ° C |
| Twisted pair resistance | 0,656 Ohm / m |
| Capacity twisted pair | 98.4 PF / M |
| Inductance twisted couple | 8.2 μH / m |
| Maximum operating voltage | 40 B. |
| Maximum length loop | 1220 M. |
| External diameter of thermokabel | 4 mm |
| Operating temperature range | -40 ° C ... + 46 ° C |
| Equipment: |
|
- Protection of explosive objects;
- Alarm for office;
- Fire alarm for cafes and clubs;
- Alarm to the store;
- Fire systems for warehouse and office premises;
- Autonomous fire alarm for apartment, house or cottage;
- Fire alarm for indoor car parks, garages and parking;
- Comprehensive fire protection for state institutions (kindergartens, schools, other educational institutions)
Special attention when choosing, take a careful study of the technical characteristics, choosing suitable security detectors, fire detectors, special cable products. IPTT line models are some of the best In terms of price-quality ratio and recommended for use in a wide spectrum security and fire alarm systems.
Analogs of ILTT 68 155 XCR and other properties similar to the following characteristics:
Buy and order delivery of fire alarm systems in Moscow:
Thermal linear detector (thermocabel) IPTT 68/155 XCR, as well as other products (their analogues, detectors, control devices) You can order and buy in our online fire alarm store or order delivery and custom installation services in your premises in Moscow In the ABARS company. (Attention, delivery is free when ordering over 60 thousand rubles).
Linear thermal detector (thermocabel) manufactured by Protectowire (USA)
Call for refinement!
Linear thermal detector (thermocabel) Production of the company Protectowire.(USA) is a cable that is designed to detect fires to increase the optical density of the medium during its smoothness, by the value of the ambient temperature anywhere throughout its entire. The thermocabel is a continuous sensor and applies in cases where the conditions do not allow the installation and use of thermal point detectors, and in conditions of increased explosion hazard, the use of thermocabel is the best solution.
Main characteristics
A given response temperature all over;
Issuance of the "Fire" signal on six temperature values;
High resistance to humidity, dust, low temperatures and chemical reagents;
Irreplaceable in explosive zones;
Easy to install and adjust;
Economical, no expenses for operation;
If it is necessary, the extension is simply added to the system;
Does not require maintenance;
Expected service life for more than 25 years;
Has a certificate of SSPB.
Description
The linear thermal detector Protectowire consists of two steel conductors, each of which has an insulating coating from a heat-sensitive polymer. Conductors with an insulating coating are twisted to create a mechanical voltage between them, then coated with protective insulation and placed in a shell to protect against the effects of adverse environmental conditions.
Upon reaching the threshold value of the temperature, under the action of the pressure of the conductors, the insulating coating of the heat-sensitive polymer occurs, and to the closure of the conductors. This happens in the first overheating point on the thermocabel highway. The ProtectOWIRE thermokabel is a maximum thermal detector and therefore allows an alarm signal when the temperature threshold is reached at any point along the entire length of the cable.
Classification of thermocabel
Currently, there are four types of thermocabel: EPC, EPR, XLT, TRI (Tri-Wire ™) characterized by the appointment and material from which an external protective shell is made for use in a wide variety of environmental conditions.
Type EPC.
Thermocabel Type EPC has a vinyl protective shell of a cable that has a good flexibility at low ambient temperatures. The thermocabel is universal and well suited for both industrial and commercial use.
Type EPR.
The thermocabel type EPR has a solid fire-resistant outer shell of polypropylene resistant to the effects of ultraviolet radiation. Designed for widespread applications in places with elevated ambient temperatures. It has high reliability, elasticity, resistant to abrasion and impact of atmospheric factors.
PHSC-190-EPR
PHSC-280-EPR
PHSC-356-EPR
Type XLT.
The thermocabel type XLT has a special outer sheath-resistant to low temperatures. Specially designed for use at extremely low temperatures in the warehouses of refrigerators, freezers, unheated warehouses, as well as in the severe climatic conditions of the North.
TRI type (Tri-Wire ™)
Thermocabel type TRI (Tri-Wire ™) is a combined (two-temperature) thermal detector, which issues from the established temperature thresholds "Attention" and "Fire". The thermocabel has a solid elastic, moisture-fire-resistant outer casing of vinyl, resistant to the effects of most ordinary chemicals.
Technical data
|
designation |
Logics |
The temperature is triggered, o C |
Operating temperature range, o C |
Application area |
|
One temperature |
Normal conditions |
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|
Aggressive environments |
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|
Low |
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|
Combined. (two temperatures) |
68- "Attention" |
Getting double work |
ProTectowire thermokabel installation method
The ProtectOWIRE thermocabel must be laid in solid segments without taps and branches in accordance with the requirements of the fire organs to the location and configuration of the thermocabel in space. In addition to the requirements of separation on the detection zones (definition source), the length of each bit of the thermocabel is limited and controlled by the control device to which the detector is connected.
Norms of installation of the thermocabel (linear thermal detector) according to the NPB 88-2001 *, paragraph 12.37
The ProtectOWIRE linear thermal detector works on the principle of a device with a normally open contact, which is closed when triggered. Therefore, the thermocabel should be used only in those signaling loops that can detect contact closure and transfer the alarm.
The ProtectowIire thermocabel is a contact device with an active resistance distributed over the entire length of the cable, unlike traditional point thermal detectors that change their resistance when responding. Relatively high detector resistance, 1 Ohm for every 1.5 m twisted pair, requires measurements of resistance of each device to which the thermocabel will be connected to determine the maximum allowable thermocabel length in order to avoid exceeding the maximum resistance of the alarm loop.
When using large areas of the thermocabel, the resistance in the loop may exceed the valid values, as a result of which the control panel will constantly issue a "malfunction" signal, or alarm loop will not be able to generate alarm. This problem is solved using the PIM-120 interface modules, to which you can connect up to 2000 meters of thermokabel and PIM - 420D - 1525 meters of thermocabyl.
The ProtectowIire linear thermal detector reacts to a change in the ambient temperature when the fire occurs. Therefore used mounting materials Must provide adequate support at temperatures not lower than the threshold value. Fasteners are installed every 1.5-3 m, as well as if it is necessary to prevent excessive wire sagging, which causes the tension of the wire in the mounting places. Incorrect installation or fastening of the thermocabel can lead to mechanical damage to the detector, for example, in technological areas, storage facilities using loading equipment.
The location of the thermocabel.
The ProtectOkire linear thermal detector must be installed in the protective room on the ceiling or walls at a distance of no more than 500 mm from the ceiling. The thermokabel is paving directly above the source of the danger so that it (thermocabel) has exposed to hot air during a fire, or under any horizontal surface that will cause the same radial propagation of heat as the ceiling of the room in which the protection object is located.
In some cases it is very important to detect overheating, in which the equipment failure or the occurrence of the fire is possible. A typical example is the protection of electric motors or rollers of conveyors whose roller bearings are overheated and jammed.
The advantage of the ProtectOWire thermocabel is that it can be installed close to the critical part of the protected object, which provides a quick triggering of the detector.
Laying the detector track
All models of the linear thermal detector Protectowire passed tests in the underwriters laboratory Laboratories (UL, USA) and / or Factory Mutual Research Corporation (FM). According to the results of tests conducted in accordance with the established certification authorities with the requirements of test standards, the maximum allowable distances between the thermocabel laying lines relative to the maximum detector action zone for various applications were determined.
The maximum distance between the Protectowire thermokabels.
When installing the thermocabel outside the premises, it is very important to keep in mind that the ranges made to the NPB 88- 01 are the maximum allowable distance between the location of the thermocabel and should be used as a starting point for designing the location of the detectors. Depending on the specific conditions of application, such as the design and height of the ceiling, physical obstacles, air flows or the requirements of local semi-zero organs, the maximum allowable distance between the thermocabel's tracks may be less. Finally, the track and the distance between the thermocabel lines are determined by the results of engineering assessment.
Installing the ProtectOWire thermokabel on smooth ceilings
When installing thermocabels on smooth ceilings, the distance between parallel sections of the cables should not exceed the maximum permissible value entered in the NPB 88-01. Thus, the thermocabel should be laid at a distance of no more than 1/2 of the established permissible value from all walls (the distance is measured from the right angle) or ceiling floors protruding no more than 50 cm, as shown in Figure:
Balley overlap design
In structures with beam overlaps, etc. Heat freely lowers along the beams. However, the spread of heat horizontally is difficult due to beams, so in this direction the distance between the thermocabel lines should be less. The thermocabel is paved along the bottom side of the beams, the distance between all the thermocabel lines parallel to the beams should not exceed 50% of the distance between the cable lines deployed on the smooth ceiling
Boyful construction
If a ceiling beams They are not more than 100 mm, the ceiling is considered smooth, if more - the thermocabel is laid from the right angle at a distance of no more than 2/3 of the distance when installed on a smooth ceiling. If the beam performs down from the ceiling for a distance of more than 50 cm and less 2.4 m in the center, each compartment formed by the beams should be protected separately.
"Dead zone
The warm air of the jet rises from a fire source to the ceiling, radially spreading. As the air is cooling, the air begins to drop down. The angle where the ceiling and two adjacent walls are connected, forms a zone called the "dead" zone. In most cases, this "dead" zone is a triangle with parties 10 cm. Along the ceiling (measured from the angle) and 10 cm. Down the wall. Do not install Protectowire thermokabel in this zone!
Downstream ceilings
In a room with a lower ceiling or a pointed roof, one or more linear thermal detectors ProtectOWIRE should be installed at a distance of not more than 0.9 m from the highest point of the roof measured by horizontally. The distance between the ProtectOWIRE thermokabel's additional lines, if they are locked, is determined based on the distance measured by horizontally, which is obtained when designing down from the ceiling, and considering the ceiling design.
Building thermocabel
A variety of designs of linear thermal detectors Protectowire and materials from which protecting braids are made, provide resistance to various chemicals, liquids and atmospheric factors and make thermocabelle suitable for a wide range of applications.
Since it is not always possible to accurately determine the effectiveness of the negative impact of aggressive media on the thermocabel, we recommend that the samples are testing at the site installation site to determine: the selected thermocabel models are suitable or not for these environmental conditions.
When designing a detection system to use outdoors, it is necessary to take into account the effects of solar radiation. Direct hit sun ray or the so-called "complete radiation" can lead to the heating of the cable or mounting surface To the temperature above the permissible maximum ambient temperature or the temperature threshold of the sensor.
Therefore, preventive measures are very important, such as a protective screen over the cable to reduce the temperature to permissible values. In addition, the screen will slow down the destruction of the protective braid of the thermokabel under the influence of solar radiation. In the models of the EPN and EPR thermokabels in the material from which the protective braid is made, a special inhibitor has been added to protect against ultraviolet radiation and extending the detector's service.
When using a thermocabel outside of premises, all connections recommended by the splicing method or through the terminals must be performed in the respective connecting boxes. If the cable is installed in conditions high humidityAll connections are performed by splicing using PWSC or PWS insulating tubes or SFTS insulating tape.
Warnings
The linear thermal detector is made of durable material, but it may be damaged when squeezed or puncture. The results of such damage may be externally visible on the conductor and can not immediately appear, but damage to the external protective braid or mechanical load on the wire during installation may later cause false responses.
Therefore, during installation it is impossible:
Leave the cable on the floor, walk on it or put a staircase on it during installation;
Apply non-original fasteners if they are not approved by The ProtectowIire Company;
Lay the thermocabel in places where there is a risk of mechanical damage in technological processes;
Throw fasteners, as this can lead to the destruction of the outer protective braid and the inner insulating layer and, as a result, cause false responses. All attachments should allow the wire to shrink and stretch with temperature fluctuations;
To pull the thermocabel too much, some "sagging" wires between fasteners normally;
Bending the thermocabel at an angle of 90 °;
Use pliers or forceps to flexing the thermocabel. All bends are performed only by hand, the bend radius should not be less than 6.5 cm;
Apply Wire nuts or other similar devices. All compounds must be performed through terminals and / or flexible conclusions of ProtectowIire insulating tubes;
Collect linear thermal detector.
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