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Fire Detection in Tunnels
Sandeep S. Tamhankar, the founder of United Telecom Ventures Pvt Ltd has been instrumental in steering United Telecom from its early focus on voice cabling to becoming a pioneer in data and fibre networking. Founded in 1996 and with a registered office in Mumbai, the company has expanded its operations to 19 states across India and four countries globally. Tamhankar talks about the evolving market and the need to diversify into areas like Fire Alarm Systems, CCTV and ELV subsystem.
United Telecom has established itself in the ELV and networking sectors…
The company specializes in line-type heat detectors for tunnels and industries, which enhance human safety, indirectly contributing to the prioritization of safety over work. Tunnels act as connectors on major highways, and any failure in a tunnel could result in an interruption of essential services. Early detection allows for rapid intervention, minimizing damages and delays.
The unique features of line-type heat detectors have made road infrastructure much safer. ATMS projects consist of various distributed subsystems, centralized and monitored at the ATMS Control Centre. These include: Emergency Roadside Telephone Systems, Video Surveillance Systems, Vehicle Incident Detection & Enforcement Systems, Meteorological Systems, Mobile Radio Communication Systems, Variable Messaging Systems, Automatic Traffic Counter cum Classifiers, Vehicle Actuated Speed Display Systems, Travel Time Estimation Systems, and more.
How does fire detection work in tunnels?
Our automatic fire alarm system has linear heat detector with integrated temperature measuring points for monitoring sources of danger in buildings (industrial application).The hermetically sealed sensor cable contains temperature sensors which, depending on the application, are placed at selectable intervals. The sensors are electrically connected by a flat flexible cable.
The sensor cable is either directly connected with the evaluation unit or connected via a connection cable and a connection box and is terminated with a heat shrinkable cap.
The measuring points have fixed addresses, ensuring that their physical location is precisely determined. The evaluation unit SCU 800 is the central supervisory element for the d-LIST-system. It provides up to two d-LIST sensor cables with power, performs the cyclic addressing of the connected sensors every ten seconds, acquires the temperature values measured by each sensor and evaluates the data with reference to various criteria.
A fire alarm is actuated if either the temperature at a measuring point exceeds a threshold value, or a defined temperature increase is registered over a period of time (differential behaviour). Both alarm threshold values can be freely programmed, on a separate basis for both sensor cable routes.