SPECIAL FIRE DETECTION SYSTEMS (LINEAR HEAT DETECTORS, SMOKE DETECTORS)
ASPIRATION SMOKE SENSOR – ASD
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The highly sensitive aspiration smoke detector ASD is used whenever it is necessary to detect even minimal, barely perceivable smoke aerosols.
"Aspiration Smoke Detector“ proven, VdS and FM approved system is used for monitoring buildings and premises such as:
 IT and computer centres
Radio and TV broadcast installations
Display windows
Telecommunication centres
Laboratory and research centres
High-bay warehouses and distribution centres
Electronic test laboratories
Airports
Railway carriages
Museums, galleries, theatres and cinemas
An aspiration smoke detector consists essentially of two parts: the randomly connectable sampling pipe with individual small sampling holes, and the detection chamber. The chamber contains one or two sensitive smoke detectors, a fan and the electronic evaluating circuit. The fan aspirates the ambient air into the detection chamber via the sampling points and feeds it to the smoke detector. Smoke particles are immediately detected.
If the limit value is exceeded, a fire alarm control panel is automatically actuated.
For high sensitive applications the particle counting principle using a laser beam is used instead of the smoke detector. ASD systems do not wait for the smoke to rise; instead they actively draw it in; this means they respond much more quickly and sensitively to any fires that occur than conventional solutions.
Another advantage is that the sampling pipes can be invisibly mounted in small hollow floors and dropped ceilings without affecting the overall aesthetics of the premises. |
SMOKE AND TEMPERATURE SENSOR – ET531
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The ET 531 is a combined fire detector.
The smoke sensor detects smouldering, glowing and open fire with smoke generation at an early stage.
The temperature sensor detect fast-spreading fire with high temperature even in the absence of smoke generation.
The smoke detector incorporates 2 programmable pre-alarm stages, while the temperature detection can be adjusted for classes A1, A2 and B.
The smoke is identified and parameterized.
Selfmonitoring , two-stage soiling display and an alarm threshold adjustment all guarantee optimal function.
In addition to the programmable control output, the detector also emits a warning signal when the ambient temperature is too high. |
LINEAR HEAT DETECTOR
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Linear heat detectors are based on the physical principle that, for a given volume, the pressure of a gas changes whenever its temperature changes.
Over a distance of approx. 100 m a copper sensor tube monitors the ambient temperature. A fire source will heat up the sensor tube locally and, with it, the air it contains. The change in pressure is instantly registered by an electronic pressure sensor connected to the extremity of the tube. To exclude faulty measurements due to pressure losses, a test motor generates a specific overpressure in the sensor tube at regular intervals. If the pressure rise actually measured does not correspond to the programmed measured value, a malfunction indication is displayed. The system is user-friendly, immune to electrical, thermal and mechanical interference, and can be used as a combined rate-of-rise temperature detector/fixed temperature heat detector.
ATEX APPLICATION
The TRANSAFE ADW 511 Ex II ATEX is a linear heat differential/ABSOLUTE DETECTOR FOR USE IN Ex zones 2 and 22.
It works in on the principle of volume expansion of a gas due to warning. The gas in a pneumatically sealed system and increased the pressure when heated.
The TRANSAFE ADW 511 Ex II ATEX consists of the SENSTUBE (sensor tube network) and the detector box.
The sensor tube is made of copper with a rated width of 4 mm and an outer diameter of 5mm.
The sensor tube can be deployed to a maximum length of 130m.
In the detector box there is a fully electronic pressure sensor, a devise for artificially generating pressure (to check sealing), and processor- controlled evaluating electronics.
The pressure sensor continuously measures the absolute pressure in the sensor tube,
The sensor signals are evaluated by the microprocessor.
The differential behaviour is formed electronically.
If the pressure in the sensor tube increases within the time loop defined in the software, the ADW 511 Ex II ATEX triggers an alarm. Disturbance levels caused by, for example, temperature fluctuation due to the weather ( slow changes in pressure) or pressure impact due to heavy traffic in traffic tunnel are “filtered” based on time and do not trigger an alarm.
The absolute temperature evaluation of the ADW 511 Ex II ATEX is designed so that the pressure value, which corresponds to a programmable maximum temperature, triggers an alarm. The maximum evaluation also works if there is a slow increase of pressure over a longer period of time (e. g. ΔT = 40° C/hr ; overheating of an over).
A temperature sensor in the detector box continually measures the current ambient temperature and constitutes the reference value for the maximum evaluation.
In addition to the differential and evaluation of absolute maximum, the ADW 511 Ex II ATEX also has a pre-alarm evaluation function. This can be defined and activated by PC.
A test motor with a pressure pump generates a precisely defined excess pressure in the sensor tube at regular intervals. When this is done, if the measured value does not correspond to the target value, the ADW 511 Ex II ATEX detects a leak or a constriction in the sensor tube and reports a fault.
The ADW 511 Ex II ATEX has two potentially-free changeover contacts for alarm and fault. A third relay is defined as a reserved relay and can be used, for example, as a pre-alarm or other customer-specific event. The ADW 511 Ex II ATEX also has a serial port for connecting to a PC. |
THE CABLE LINEAR HEAT DETECTOR – ETEA ET TSC
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DESIGN AND FUNCTION.
The Etea ET TSC 511 system is based on data mapping by a number of temperature sensors with are integrated into the sensor cable at regular intervals.
The system is capable of measuring the actual ambient temperature ( convection heat) as well as portion of infrared radiation (radiation heat).
Thanks to these characteristics, the response time of the linear heat detector is extremely short.
The intelligent cable terminal processor evaluates the measured data and, on the basis of the programmed settings, determines if an alarm or any other signals needs to be triggered.
The Etea TSC PC software is an extremely flexible programming environment that allows simple configuration of the cable terminal processor in accordance with the project-specific requirements.
Besides the programming functions, the Etea ET TSC software also offers useful visualisation functions. Thanks to the temperature profile, the status of the monitored object can be instantly evaluated at any time. In case of an alarm, a quick overall picture of the current situations possible.
The freely programmable relays on the cable terminal processor and the relay output extension can be used for regulating the required systems in case of an alarm or fault. Here too, all configuration can be undertaken using the TSC PC software.
SYSTEM CONCEPT
The Etea ET TSC 515 system includes the following main elements:
Temperature sensor cable (TSC 515) with integrated temperature sensor
Cable terminal processor (CTP) to evaluate the measured data from 1-2 sensor cables. With intelligent interfaces for configuring (RS 232) and communication (RS 485) with the superordinate systems, or of output of a temperature profile
Relay output extension (ROE) with 16/32 potential-fee relay contacts and 15 open collector outputs
Cable terminator module (CTM)
Cable connector/filter module (CFM/PFM) for connecting the sensor cable
Etea ET software: PC-SW visualising the data and parametering the system. |
HEAT DYNAMIC LINEAR DETECTION SYSTEM - ETEX
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The sensor control unit ETEX is the central supervisory element, performs the cyclic addressing of the connected sensors every 10 seconds, acquires the temperature values measured by each sensor and evaluates the data with reference to various criteria.
A fire alarm is generated if either a given maximum threshold is exceeded, or if an increase in temperature takes place within a certain time (differential evaluation). The two thresholds (set-points) can be set individually for each of the attached sensor cables. The measurement resolution of 0,1° gives the system a high sensitivity. The tried and tested algorithms used in the evaluation eliminate false alarms due to natural temperature variations. Alarms are indicated by LEDs on the front-panel and via floating
contacts to a fire terminal station (fire control panel), host computers or other transmission systems. Hereby, alarms generated by the two sensor cables are signalled individually |
FIRE ALARM CONTROL PANEL - ALARM MANAGEMENT SYSTEM
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SFP 512 - 4-12 Zone (conventional)
SecuriPro Compact - 1-2 Loop (addressable)
SecuriPro - 1-24 Loop (addressable)
AlViS - Alarm Management System
Gateway
Alarm Management and Visualization for
Fire Alarm System (FAS)
Intrusion Alarm System (IAS)
Access Control System
CCTV System
Building Management System
Extremely simple, standardized operation of security systems
Subsystem remote control using graphics
Password-protected access
Multi language system, switchable online
Client / Server Architecture
Open system
Easy implementation of complex functions
WEB support |
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