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Telegrafia, in cooperation with its partner MicroStep-MIS spol. s r. o., has successfully completed the delivery, installation and commissioning of a GIBON siren early warning system in Shahimardan, located in Uzbekistan’s Fergana Valley. The project was implemented under the United Nations Development Programme (UNDP) in close cooperation with the Ministry of Emergency Situations of Uzbekistan.

Located in eastern Uzbekistan, the Fergana Valley is one of the most densely populated regions in Central Asia. Surrounded by mountains, the area is particularly vulnerable to flash floods, mudflows and landslides, making reliable early warning systems essential for protecting local communities.

 Autonomous GIBON Electronic Sirens for Early Warning

The project included the installation of three autonomous GIBON siren systems at key locations throughout the area:

• Ministry of Emergency Situations operational centre
• Local primary school
• Pulmonology Sanatorium

Each installation includes a GIBON electronic siren, intelligent control electronics, battery backup, solar power supply and a robust mounting structure designed for reliable operation in demanding environmental conditions.

Following installation, all systems successfully passed functional testing and were officially commissioned. Comprehensive on-site training was also provided to emergency personnel, covering system operation, routine maintenance and manual activation procedures to ensure readiness during emergency situations.

 Modern Early Warning Systems Improve Disaster Preparedness

The GIBON  siren is a compact yet powerful electronic warning solution designed for industrial sites, critical infrastructure and local public warning applications. Thanks to its low power consumption and autonomous solar operation, it is particularly suitable for remote locations where access to a stable power supply may be limited.

This successful deployment demonstrates how modern warning technologies can significantly improve preparedness for natural hazards while remaining easy to install, operate and maintain. It also reinforces Telegrafia‘s long-term commitment to supporting disaster risk reduction projects around the world.

We would like to express our sincere appreciation to our partner, MicroStep-MIS spol. s r. o., as well as to the Ministry of Emergency Situations of Uzbekistan and UNDP, for their excellent cooperation, professionalism and commitment throughout the project. Their collaborative approach and dedication were instrumental in the successful implementation of this important early warning initiative.

Today, Telegrafia’s warning solutions protect communities in more than 100 countries, helping governments, emergency services and critical infrastructure operators respond more effectively to natural disasters, industrial accidents and other emergencies.

The article was written by

Monika Pavlik

Monika is an international business manager for Balkan, Benelux and Scandinavian states. She worked with a diverse range of organisations, including government institutions, IGOs in the field of migration, private sector and non-profits. The mentioned experience laid a sound foundation for a challenging and meaningful job she has in the Telegrafia Company. Therefore, she is very excited about bringing you the latest news from the field of early warning and notification systems.

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Electronic siren early warning systems are becoming a key part of modern civil protection infrastructure, delivering fast and reliable alerts to the population. In SG Mittelweser, Germany, a recent project demonstrates how electronic siren early warning systems can significantly improve emergency communication and public safety.

Several Gibon 600 W electronic sirens were installed across the municipality to expand the coverage of the local public warning system. These outdoor sirens provide immediate acoustic alerts and voice messages, ensuring that residents receive timely warnings during emergencies such as natural disasters or critical incidents. The system supports local authorities in protecting lives and improving overall emergency preparedness. 

Electronic Siren Early Warning System in Modern Civil Protection

The Gibon 600 W siren represents the fourth generation of Telegrafia’s electronic sirens. All generations are already deployed across Germany, demonstrating long-term reliability and continuous innovation in early warning technology.

Designed for outdoor use, the Gibon 600 W combines powerful sound output with advanced digital features, making it a key component of modern emergency alert systems.

 Key Features of Gibon 600 W Electronic Sirens

Wide Coverage with Four Loudspeakers

The Gibon 600 W electronic siren is designed to provide consistent and effective coverage across large areas. Equipped with four integrated loudspeakers, it ensures uniform sound distribution, allowing warning tones and voice messages to reach the entire community clearly and reliably. This wide coverage is essential for delivering timely alerts in critical situations.

Reliable Power Supply with Backup

The system operates on standard AC mains power and includes a built-in battery backup (2 × 12 V). This ensures continuous operation even during power outages, allowing the siren to deliver reliable alerts when they are needed most. Such redundancy is a key factor in modern early warning systems.

Clear Voice Messages with Digital Processing

Advanced digital signal processing (DSP) enables precise reproduction of alarm tones and voice announcements. High speech intelligibility ensures that emergency instructions are clearly understood by the population, even in noisy or stressful environments. This significantly improves the effectiveness of emergency communication.

The system supports:

• pre-recorded warning tones
• live voice announcements
• programmable alarm scenarios and priorities

Weather-Resistant Design (IP56)

The control unit is housed in an IP56-rated enclosure, providing reliable protection against dust and high-pressure water. This ensures stable and continuous operation of the siren in demanding outdoor conditions, including rain, snow, and dusty environments. Such durability is essential for maintaining the performance of early warning systems in all weather conditions.

Flexible Communication Interfaces

The modular system supports multiple communication technologies, including:

• TCP/IP
• radio communication
• GSM/LTE
• TETRA
• RS232 / RS485
• Wi-Fi
• I/O and POCSAG

It also includes Text-to-Speech, enabling automatic voice alerts in different scenarios.

Integration with National Warning Systems (MoWaS)

The siren is MoWaS-ready, allowing integration with Germany’s modular warning system. It supports automatic activation via CAP (Common Alerting Protocol) messages, ensuring fast and coordinated emergency alerts.

 Modern Civil Protection with Early Warning Systems

The deployment of Gibon 600 W electronic sirens in SG Mittelweser demonstrates how modern public warning infrastructure enhances safety and preparedness. By combining powerful acoustic performance with advanced digital communication, these sirens provide a reliable solution for emergency alerting and civil protection.

The article was written by

Michal Rosinski

Michal has lived in six countries, and he can speak four languages. He represents Telegrafia in the Asia and Germanic countries as an international business manager. He is a big fan of Jamie Oliver, eats healthily, but he still loves unhealthy food. He does not agree with Mark Twain that people can live on a good compliment for two months. Michal is a bookworm, believes in experience-dependent brain neuroplasticity that takes it roots in the idea of what we focus on. He agrees with Raj Koothrappali that Aquaman sucks; he is familiar with the fact that not Mount Everest but Olympus Mons is the tallest mountain known to man.

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Designing and implementing a reliable warning and notification system requires careful attention to many technical details. Selecting the appropriate siren type and its acoustic coverage, determining the means of communication, and choosing the method of system control are all crucial decisions. However, one factor that is sometimes underestimated is the IP rating of the siren enclosure. 

The correct level of protection ensures that sensitive electronic components – amplifiers, modules, batteries, and transceivers – remain unaffected by harsh environmental conditions. Choosing the right IP rating not only guarantees durability but also extends the operational life of the entire warning system. 

What Does an IP Rating Mean? 

The IP (Ingress Protection) code, standardized under IEC 60529, defines the level of protection electrical enclosures provide against the intrusion of solid particles and liquids. The code consists of two digits: 

• The first digit refers to protection against solids such as dust, dirt, or accidental contact with moving parts. 

• The second digit describes protection against liquids, ranging from dripping water to high-pressure water jets and temporary submersion. 

The higher the digit, the stronger the protection. This classification allows engineers and project designers to select enclosures that meet the environmental challenges of a specific location. 

Enclosures for Modern Electronic Sirens 

Telegrafia provides a wide range of enclosures for its Pavian, Gibon, Mona siren families and products, ensuring flexibility for both standard outdoor use and highly demanding environments. To help system designers select the right level of protection, the most common IP ratings we offer can be briefly described as follows: 

• IP56 – provides protection against harmful dust deposits and strong water jets. Suitable for typical outdoor conditions, including rain, wind, and airborne particles. 

• IP66 – offers complete protection against dust and powerful water jets. This level is recommended for installations in dusty, humid, or industrial environments where higher resilience is required. 

• IP67 – ensures full dust-tight sealing and protection against temporary immersion in water. It is designed for extreme outdoor conditions, guaranteeing maximum durability and reliability even in the harshest climates. 

These general IP ratings are available in different material and design variants across Telegrafia sirens. The most common configurations include: 

Stainless Steel Enclosures (Pavian & Gibon) 

• IP56 – with ventilation grilles and a standard filter 

• IP66 – with ventilation grilles and a fine filter 

• IP67 – completely sealed without ventilation grilles 

Powder-Coated Enclosures (Gibon & Mona) 

• IP56 – with ventilation grilles and a standard filter 

• IP66 – with ventilation grilles and a fine filter 

All these enclosures are designed for reliable outdoor use and can operate in a wide temperature range from –25 °C up to +65 °C, with the higher-rated IP66 and IP67 variants providing additional resilience in extreme conditions. 

Horn Protection

While enclosures safeguard electronic modules, the siren horns also require proper protection. Horns are exposed directly to the environment and may suffer from insect intrusion, bird nesting, or damage from sand and dust particles. To prevent this, protective nets are recommended. 

Available configurations: 

• IP56 – standard delivery, available for both large and small horns 

• IP66 – optional upgrade for large horns, offering higher protection against water and fine particles 

Conclusion

When designing a warning system, enclosure protection should be considered just as carefully as acoustic power or communication technology. With modern options ranging from IP56 to IP67, a guaranteed operating temperature range from -25 °C up to +65 °C, and upgraded horn protection, Telegrafia’s Pavian, Gibon, and Mona sirens provide reliable operation even in the most demanding environmental conditions. 

By selecting the right enclosure, system designers can ensure long-term durability, lower maintenance requirements, and dependable functionality when it matters most. In the end, proper enclosure selection is not just a technical detail, but a key factor in guaranteeing the reliability of every warning and notification system. 

The article was written by

Róbert Jakab

Robert is like a moving photograph – because he is like a video. He can capture 60 frames per second. Whenever something happens, he records it. Currently, he’s working on smaller videos and hoping to make a feature film one day and then its sequel. Telegrafia 2: Monkey Power

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GSMA (Global System for Mobile Communications Association) is an international organization representing the interests of mobile operators worldwide. GSMA works to improve access to mobile connectivity and harness its potential for social and economic development. In the context of natural disaster preparedness—such as tsunamis, floods, and earthquakes—mobile technologies play a vital role in early warning systems. The GSMA report Early Warning Systems in the Philippines: Building resilience through mobile and digital technologies sheds important light on the crucial role of sirens and mobile technologies in early warning systems in the Philippines, demonstrating how their integration can significantly enhance the effectiveness of alerting and protecting communities from natural disasters. 

The Role of Mobility in Early Warning Systems  

Mobility is more than just making calls or sending texts. It means the ability to quickly and widely transmit critical information to people in vulnerable areas. For the Philippines, a country highly exposed to natural disasters, leveraging mobile networks in warning systems significantly increases the chances of reaching communities rapidly and saving lives. 

Why Are Sirens Important? 

Sirens are one of the oldest yet most effective means of alerting communities to imminent danger. The GSMA report highlights that in areas with limited internet access, low smartphone penetration, or where mobile networks might be overloaded or unavailable, sirens provide a reliable way to instantly alert residents. The GSMA document emphasizes that an effective early warning system combines multiple technologies: sirens, mass SMS alerts, mobile apps, and traditional media. Sirens act as the first line of alarm, while mobile systems provide detailed information, instructions, and updates. In the Philippines, systems like the Tsunami Early Warning System (TeWS) use GSM technologies to activate sirens and send SMS alerts to residents in at-risk coastal areas. This integration allows for: 

• Rapid and wide-scale population notification. 

• Targeted messages sent to specific locations. 

• Real-time monitoring of alert reception and community response. 

Telegrafia Shares Expertise to Strengthen Early Warning Systems in the Philippines 

Telegrafia, a leading company in electronic siren technology, gladly shares its extensive experience with the Philippines, supporting the development and implementation of advanced early warning systems to better protect communities from natural disasters: 

1. Telegrafia’s Gibon Multi-Siren Early Warning System on the Island of Cebu 

1. Typhoon Kammuri and the Critical Need for Advanced Early Warning Systems in the Philippines 

1. Howler (Philippines) 

The integration of sirens with mobile and digital technologies represents a powerful approach to disaster preparedness and community safety. By combining immediate, loud alerts with detailed mobile communication, early warning systems in the Philippines set a valuable example for other vulnerable regions worldwide. Telegrafia remains committed to advancing these technologies and fostering resilient societies through innovation and partnership. 

The article was written by

Michal Rosinski

Michal has lived in six countries, and he can speak four languages. He represents Telegrafia in the USA, Asia, Australia and Germanic countries as an international business manager. He is a big fan of Jamie Oliver, eats healthily, but he still loves unhealthy food. He does not agree with Mark Twain that people can live on a good compliment for two months. Michal is a bookworm, believes in experience-dependent brain neuroplasticity that takes it roots in the idea of what we focus on. He agrees with Raj Koothrappali that Aquaman sucks; he is familiar with the fact that not Mount Everest but Olympus Mons is the tallest mountain known to man.

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The state of Terengganu, Malaysia, has taken a significant step towards enhancing its disaster preparedness by installing four Gibon electronic sirens. These state-of-the-art sirens have been strategically placed in high-risk flood-prone areas to improve the early flood warning system and ensure community safety. 

Electronic Siren Gibon as an Advanced Solution for Flood Early Warning

Flooding is a recurring threat in Terengganu, especially during the monsoon season, posing risks to residents and infrastructure. The newly installed Gibon electronic sirens will provide early alerts, giving people sufficient time to take precautionary measures or evacuate if necessary. Their powerful acoustic reach ensures that warnings are heard even in challenging environmental conditions, reinforcing the effectiveness of the region’s early flood warning system. The Siren Gibon features 600W of power, high-performance Class D amplifiers, and modern, uniquely designed small loudspeakers that help reduce installation size with virtually no loss in decibel coverage. These standalone sirens come equipped with battery backup and independent solar power, ensuring reliability during power outages, which frequently occur during floods and water disaster. Weather-resistant components and a design tailored for this type of deployment ensure the equipment’s longevity in harsh conditions. 

Strengthening Disaster Response Efforts

The deployment of these sirens aligns with broader efforts to modernize emergency communication systems in Malaysia. Th preparedness saves lives, and an efficient early flood warning system is crucial for minimizing flood-related casualties and damages. By integrating cutting-edge technology into disaster management strategies, Terengganu is setting an example of proactive resilience. These four sirens mark an important milestone in ensuring that communities remain safe, informed, and ready to respond to emergencies effectively. We are grateful for the trust and cooperation, and we are proud to be the chosen solution. 

The article was written by

Michal Rosinski

Michal has lived in six countries, and he can speak four languages. He represents Telegrafia in the USA, Asia, Australia and Germanic countries as an international business manager. He is a big fan of Jamie Oliver, eats healthily, but he still loves unhealthy food. He does not agree with Mark Twain that people can live on a good compliment for two months. Michal is a bookworm, believes in experience-dependent brain neuroplasticity that takes it roots in the idea of what we focus on. He agrees with Raj Koothrappali that Aquaman sucks; he is familiar with the fact that not Mount Everest but Olympus Mons is the tallest mountain known to man.

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Country: The Philippines, Asia

Goal of the project: Implementation of a reliable and state-of-the-art early warning system to warn the citizens of impending threats

Commencement of the project: 2023/4

The island of Cebu, a vibrant jewel in the Philippine archipelago, is a beautiful place with a local population. However, beneath this idyllic facade lies vulnerability to the forces of nature. Like many of the islands in the Philippines, Cebu is situated in the Pacific Ring of Fire, making it prone to frequent earthquakes, volcanic eruptions, and typhoons. These natural disasters constantly threaten the island’s population, infrastructure, and economy. Recognising this vulnerability, the residents of Cebu have embraced the Gibon electronic multi-siren system as a vital life-saving measure. These sirens, strategically placed throughout the island, provide a timely and effective warning system for approaching natural disasters, allowing the local people to evacuate to safety, secure their belongings, and prepare for the impending threat. The Gibon system, through its piercing and unmistakable sound, empowers Cebuanos with the vital seconds and minutes they need to react proactively, minimise casualties, and protect their communities.

Powerful Gibon sirens are designed to emit thunderous and piercing sounds to warn the public of imminent danger or emergencies. These sirens can produce sound levels over 120 decibels (dB). The high output generated by these electronic sirens is necessary to ensure they can be heard over long distances and in noisy environments, such as natural disasters. The sound emitted by the sirens is often described as a piercing wail or a shrill alarm designed to attract attention and elicit an immediate response. To avoid hearing damage, it is essential that they are installed above pedestrian zones and that a safe distance is maintained when they are activated. The true impact of a siren’s volume can only be experienced first-hand. We are pleased to present two interesting videos about the activation of siren alarms. By capturing the raw and unfiltered sound of the sirens in real-world scenarios, these hand-crafted films offer a visceral understanding of how loud and attention-grabbing they can be.

The article was written by

Michal Rosinski

Michal has lived in six countries, and he can speak four languages. He represents Telegrafia in the USA, Asia, Australia and Germanic countries as an international business manager. He is a big fan of Jamie Oliver, eats healthily, but he still loves unhealthy food. He does not agree with Mark Twain that people can live on a good compliment for two months. Michal is a bookworm, believes in experience-dependent brain neuroplasticity that takes it roots in the idea of what we focus on. He agrees with Raj Koothrappali that Aquaman sucks; he is familiar with the fact that not Mount Everest but Olympus Mons is the tallest mountain known to man.

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Project Name: Early Warning System for the Camp
Country: Orellana Province, Ecuador
Project Objective: To warn people in the camp in case of threats
Number of Sirens: 1 x Gibon 300

Halliburton, a company dedicated to providing global sustainable energy solutions that go beyond conventional energy sources, required a system to warn people in case of threats at their camp in Ecuador. To address this need, a Gibon 300 siren was installed, ensuring the safety and preparedness of their personnel. This project highlights Halliburton’s commitment to safety and advanced technology in challenging environments.

The early warning siren is designed to be activated in two ways:

• Manual activation: Using four buttons, two different alarms can be activated. The third button is used for testing, and the fourth button is for stopping the alarms.
• Activation via mobile phone: SMS can activate an alarm, test, or stop the system, while a phone call activates the microphone announcement.

Based on the acoustic project in the Acusticus program, the Gibon 300 siren with two horns was recommended. These horns can be directed to ensure the most effective distribution of the warning signal. Thanks to the efficient installation by our partner company Extintec – Protección industrial y control contra incendios, Ecuador (extintec.com.ec), the sirens were almost immediately ready for use.

The article was written by

Petra Rychtarcikova

Petra is an international business manager in charge of Spanish, French and Portuguese-speaking countries. Petra, with her global, economic and logistic background and knowledge of four languages, does very productive and responsible work for Telegrafia. Latin-American affairs, travelling, tourism and electronic sirens are her hobbies, and she is pleased to bring you exciting information from the Telegrafia world.

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Courtesy of our esteemed partner, Telegrafia’s ingenious solutions were prominently showcased at the Region’s Leading Water and Water Platform for Developing Asia, a prestigious event held from April 23rd to 25th, 2024, at the renowned Kuala Lumpur Convention Centre. This highly anticipated event brought together industry experts, inspirational leaders and decision-makers from across Asia to delve into the transformative power of water and water-related technologies. Telegrafia’s cutting-edge products and services garnered significant attention, offering innovative and sustainable approaches to address the region’s water-related challenges. Telegrafia presented a trendy component of the weather early warning system – the Gibon electronic siren with small loudspeakers.

Telegrafia, a leading siren provider in Malaysia, has played a pivotal role in enhancing public safety by implementing numerous critical flood and tsunami warning systems throughout the country. Our expertise in siren technology, coupled with a deep understanding of local conditions and hazard risks, has enabled us to design and deploy effective early warning systems. From coastal areas susceptible to tsunamis to flood-prone river basins, Telegrafia’s sirens provide vital alerts, giving communities precious time to evacuate. We work closely with local authorities to help build a resilient network of early warning systems that safeguard Malaysian communities from the devastating impacts of natural disasters. Our commitment to innovation and public safety continues to drive us to develop cutting-edge solutions that empower communities to be better.

The Gibon electronic siren reigns supreme as the most popular siren among Malaysian early warning systems. Gibon’s versatility makes the siren highly adaptable for diverse security needs. Its small, relatively light, yet extremely powerful loudspeakers make the warning system cost-effective. Combined with a high-decibel output, the Gibon siren provides a potent deterrent in emergencies. These sirens, strategically installed in vulnerable areas, serve as vital lifelines, broadcasting timely and clearly audible alerts that enable communities to take swift action and evacuate safely during flood or tsunami events. Giving the local communities instructions and appropriate response time is essential in safeguarding lives and property during potentially devastating events.

As we have bid farewell to our platform’s current edition, we look forward to meeting again at the new edition in 2026.

The article was written by

Michal Rosinski

Michal has lived in six countries, and he can speak four languages. He represents Telegrafia in the USA, Asia, Australia and Germanic countries as an international business manager. He is a big fan of Jamie Oliver, eats healthily, but he still loves unhealthy food. He does not agree with Mark Twain that people can live on a good compliment for two months. Michal is a bookworm, believes in experience-dependent brain neuroplasticity that takes it roots in the idea of what we focus on. He agrees with Raj Koothrappali that Aquaman sucks; he is familiar with the fact that not Mount Everest but Olympus Mons is the tallest mountain known to man.

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Project Name: Kuala Lumpur Area Flood Forecasting and Early Warning System

Country: Malaysia, Asia

Project Goal: Implementation of a reliable and state-of-the-art flood warning system to warn the citizens of an upcoming flood threat

Number of flood sirens: 33 Gibon 600W sirens

Commencement of the project: 2021-2024

Rapid Flood Warning Systems: A Crucial Defense Against Sudden Flood Risks

Floods occur suddenly and quickly become life-threatening. They are often caused by heavy rainfall, melting snow, or a breaking dam or levee. Unexpected floods can happen in urban or rural areas and occur with little to no warning, making people feel highly endangered. The main danger of floods is the speed and force of the rushing water. This can sweep away anything in its way, including cars, trees, and buildings. People caught in a flood risk drowning or being washed away. Moreover, the force of water can swamp debris and cause injuries and damage property. Therefore, a reliable system in place to forecast and warn people of potential floods is an enormous advantage. Such systems forecasting and warning against flash floods include technology with high-output electronic sirens. Once a threat occurs, the warning information in the form of sound alarms or clear voice messages in multiple languages can be delivered to the public through emergency sirens.

33 High-Tech Sirens for Effective Community Protection

Telegrafia a.s., thanks to and with the local Partner, was entrusted with a challenging task – to build the Kuala Lumpur Area Flood Forecasting and Early Warning System. During three years, 33 modern Gibon 600W sirens were installed in carefully selected locations. The aim was to reduce the risk of potential flood-related disasters. The sirens proved reliable and robust as they were designed and equipped with the latest cutting-edge technology to operate in harsh weather conditions. The high-quality small loudspeakers ensure the system makes a clear and loud enough sound to alert the community in an emergency. The sirens are designed to be energy-efficient (using solar power) while still not disturbing the beautiful local landscape.

Flood forecasting and early warning systems are becoming increasingly important in today’s world, where natural disasters are becoming more frequent. The system installed in the Kuala Lumpur area is a prime example of how technology can be used to protect citizens and improve their quality of life. We are proud to be part of this undertaking. Our company’s constant vigilance and unwavering commitment to keeping people safe worldwide reflect our motto: we are the solution.

The article was written by

Michal Rosinski

Michal has lived in six countries, and he can speak four languages. He represents Telegrafia in the USA, Asia, Australia and Germanic countries as an international business manager. He is a big fan of Jamie Oliver, eats healthily, but he still loves unhealthy food. He does not agree with Mark Twain that people can live on a good compliment for two months. Michal is a bookworm, believes in experience-dependent brain neuroplasticity that takes it roots in the idea of what we focus on. He agrees with Raj Koothrappali that Aquaman sucks; he is familiar with the fact that not Mount Everest but Olympus Mons is the tallest mountain known to man.

End user: Mahaweli Authority of Sri Lanka
Project: Polgolla Diversion Dam, Polgolla, Sri Lanka

“Do not think because an accident hasn’t happened to you that it can’t happen”, a safety saying dating back to the early 1900s.

Accidents may happen, however, safety precautions can prevent their fatal consequences. Electronic sirens are widely used in the entire world for early warning purposes when fast voice emergency instructions are to be given to a large group of people exposed to danger. Dams have become a fundamental element of many national ecosystems because of their economic, environmental and human social benefits. They play a key role in flood control, water supply management, irrigation, hydroelectric power generation, inland river transportation, and recreation. The great significance of all these positive impacts requires the implementation of high standard dam risk management systems, where a fast and reliable early warning and notification system holds a prominent place.

The Polgolla barrage was built across the longest river in Sri Lanka – the Mahaweli River, located in the Central Province. The main purpose of this 144-meter-long Polgolla concrete barrage is to increase the volume of water that is transferred to the Ukuwela Power Station located in a distance of 8 km from the dam. Because of the proximity of the dam to the human settlement, it was required that an audible emergency system should be constructed. The installation of an intelligent early warning system, manufactured by Telegrafia, the Slovak electronic siren producer, took place in 2015. The Polgolla Diversion Dam Early Warning System was installed to warn inhabitants living on the downstream sides of the dam up to a distance of 2 km from the spillway bridge in case flood gates are opened to release water through the spillway.

The Dam Early Warning System in Polgolla is a single integrated siren unit of the Gibon line that consists of four 150 W horns installed on a 6 m high pole. The total power output of the electronic siren is 600 W. The siren pole is located on the right bank of the river, 30 m downstream from the spillway bridge. All horns are directed towards the downstream area to receive the maximum warning distance. When the flood gates are operated remotely, the electronic siren also needs to be activated remotely from the control centre by a technical officer. When the flood gates are operated locally, the operator must instruct the technical officer at the control centre to activate the siren from the control unit before the opening of the gates.

The installed dam early warning system has many benefits, which, when combined, create a modern and very intelligent system offering a number of advantages to any user:

• Remote control – the electronic siren is controlled remotely via the RCU15 remote control unit, installed in the control centre, for fast and efficient activation of alarms.

• Multiple warning possibilities – the siren has an internal digital memory for warning signals and voice message storage (with a guaranteed capacity of at least 32 two-minute voice messages); RCU15 remote control unit has a built-in microphone to offer operators more flexibility in delivering live voice messages in addition to previously recorded warning signals and emergency instructions.

• Cost-effectiveness – Telegrafia’s dam early warning solution is a complete all-in-one and self-sufficient system designed for high-quality performance and cost-effectiveness; it is made of light and durable materials, equipped with small horns, and has low energy consumption in standby mode (less than 10 W).

• Independence in terms of power failure – the siren is equipped with two lead-acid batteries, providing power backup in case of any power failure. Alarms can be triggered even 72 hours after the power failure, which is of curtail importance for a reliable warning system.

• Remote autodiagnostics – the RCU15 remote control unit provides the siren with regular autodiagnostic functions, running time-efficient silent tests, and measuring the most important siren parameters, hence increasing a customer’s convenience and decreasing the cost of regular maintenance. It is quick and easy to use, so only by pressing a single button the operator can detect the siren status within a few seconds. Thanks to this advantage, they can feel reassured that the siren is fully operable and ready for use.

• Powerful output & Fast installation – the system can ensure a high level of audibility and maximum sound coverage of an endangered area due to the light-weight and easily-mountable horns.

The article was written by

Michal Rosinski

Michal has lived in six countries, and he can speak four languages. He represents Telegrafia in the USA, Asia, Australia and Germanic countries as an international business manager. He is a big fan of Jamie Oliver, eats healthily, but he still loves unhealthy food. He does not agree with Mark Twain that people can live on a good compliment for two months. Michal is a bookworm, believes in experience-dependent brain neuroplasticity that takes it roots in the idea of what we focus on. He agrees with Raj Koothrappali that Aquaman sucks; he is familiar with the fact that not Mount Everest but Olympus Mons is the tallest mountain known to man.