We push the boundaries of safety: Warning Notification System

Alert notification systems play an important role in today's fast and dynamic world. Especially in the environment of educational institutions, where the future is being shaped. Due to the ever-increasing threat of terrorist attacks, the security of the educational environment becomes a priority. The warning notification system plays a key role in minimizing damage and ensuring the protection of the lives of students, teachers and employees.

The importance of a warning notification system lies in several key aspects:

  1. Rapid response to emergency situations: The system enables immediate notification of danger to those present, which can be decisive in the event of a terrorist attack. Every second gained can mean the difference between safe escape and disaster.
  2. Accurate hazard location: Modern systems are able to pinpoint the source of the hazard, giving students and staff the ability to know where the safe place is.
  3. Integration with modern technologies: Systems can be integrated with modern technologies such as camera systems, smart doors and access cards.
  4. Adaptability: The system is designed to adapt to the specific needs of each educational institution. Customization is key for the system to effectively meet specific requirements.

Warning notification systems have a significant benefit not only in the school environment, but also in various other areas where safety and quick response to dangers are key.

  • Healthcare: In the healthcare industry, an alert notification system can play an important role in quickly responding to unexpected situations. Notifying medical staff immediately can be critical in saving patients' lives.
  • Apartment complexes: In apartment complexes where a large number of people live, an alert notification system can be used to warn residents of emergencies such as fires, floods or other hazards. Quick and accurate information can increase the level of safety and minimize the risk of injury.
  • Critical infrastructure: Warning notification systems are of key importance in the field of critical infrastructure, such as power plants, water and sewage networks, telecommunication centers, etc. These systems can help alert personnel immediately of possible threats and minimize impacts on infrastructure.
  • Public institutions: Alert notification systems are an important tool within public institutions such as town halls, offices, public administrations and courts. In emergency situations, these systems can provide quick and effective notifications to minimize risks and ensure the safety of employees and the public.

In light of recent tragedies, it is clear that an investment in a warning notification system is an investment in safety. The company Rewan s.r.o. is ready to help schools, hospitals and other institutions ensure a safe and peaceful environment for our and future generations. It's not just about the system, it's about safety and peace of mind - it's about your safety.


We respond to the challenges of modern electrical networks: Cable lines with high thermal resistance for very high voltage

Safety and reliability in the field of electricity are essential, so it is important to invest in quality products that will provide optimal protection. In this context, cables ducts with high thermal resistance for very high voltage are an integral part of every modern electrical network. Our cable ducts, which are suitable for such an environment, have top parameters. Their temperature resistance is fascinating. They can handle freezing conditions from -40°C but also temperatures climbing up to +70°C (up to 90°C for a short time). Their top ring stiffness from SN10 to more than SN12 guarantees that your cables will remain safe for a long time. The entire system is manufactured in accordance with ISO 9001, ISO 14001, OHSAS 18001.

Protective pipelines buried in the ground for high and very high voltage cables are designed with regard to ensuring safe and reliable transmission of electrical energy in difficult conditions. Their high temperature resistance means that they can withstand extreme temperatures and thus are able to keep the cables in the cable duct completely safe. At the same time, they are able to provide additional cooling of the cables stored in the pipe system. This is especially important when operating electrical systems where temperature conditions can be challenging.

These properties ensure a long life of the cable ducts and minimize the need for maintenance, which ultimately contributes to a reduction in total operating costs.

Cables with high heat resistance are widely used, including applications in power networks, industrial plants, telecommunications and other industries. Their flexibility and easy installation mean that they are an ideal solution for the modernization of existing networks but also for the construction of new infrastructures.

When choosing extensive multi-path cable ducts, it is important to be able to rely on proven manufacturers who offer certified products and are able to provide technical support. We are proud that our company is committed to providing the highest level of safety and quality in the supply and implementation of cable ducts with high thermal resistance for very high voltages.
The goal is to ensure that our customers can work with us with confidence. We are fully prepared to handle and ensure all their requirements, thanks to our wide portfolio of products and services. Reliable protection of electrical cables is an investment in the future, which will bring not only safety, but also a long service life and efficient operation of the electrical network.


NIS 2 : From cyber security of critical operations to mass cyber security

The NIS 2 directive is pan-European legislation in the field of cyber security. It provides legal measures to increase the overall level of cyber security in the EU.

  • On November 10, 2022, MEPs voted for the NIS2 directive
  • All EU countries must incorporate these directives into their own national laws until 17 October 2024

Under the new directive, more entities and industries will have to take measures to protect themselves. NIS 2 integrates 2 types of different industries and the new security provisions will apply to:

  • The essential entities EE energy, transport, banking, healthcare, digital infrastructure, public administration and the space sector.
  • Important EI industries such as postal services, waste management, chemicals, food, medical device manufacturing, electronics, engineering, motor vehicles or digital service providers.

The legal regulations should apply to all medium and large companies in selected sectors.

NIS 2 integrates proportionality between EE and EI


The ability to have different levels of requirements between EE and EI, mostly to take into account the means and challenges of small or large businesses.


For EE: regulation « ex-ante » (control at the discretion of the NBU)

For EI: « ex-poste » regulation (check in case of non-compliance)


It will be similar to GDPR penalties

Up to 2% of the company's turnover for EE and 1.4% for EI

Professional communication and access systems CASTEL and SYNCHRONIC are certified and prepared in accordance with this standard.

NIS 2 Directive link


Cable protection: From the design to the functionality check

Cable ducts are the basic building blocks of modern communication and energy infrastructure. The certified OPI PIPELIFE cable system ensures reliable implementation and installation of cable lines, minimizes malfunctions and enables quick and efficient diagnostics.

Cable design:

  1. Requirement Analysis: The first step in cable duct design is a thorough analysis of project requirements. Cable type, capacity, maximum length, topology, maximum load and other technical specifications must be determined.
  2. Selection of suitable cable duct composition: Top parameters of OPI cable duct, such as circular stiffness up to 14.72kN/m2 and watertightness up to 0.5 bar. enable the design of suitable cable duct components even for the most demanding applications.
  3. Cable route: Using a wide range of system elements, such as radii at different angles, can optimize the cable route, which is essential to minimize interference and mechanical problems. Terrain, existing or planned utility networks and potential buffer zones should be considered.

Cable duct installation:

  1. Route preparation: Route preparation is required before installation. This includes excavation in the required volume, preparation of a compacted base bed, and possibly installation of supporting structures.
  2. Installation of the cable duct: After preparing the route, the cable duct is installed according to the prescribed standards and installation instructions. The cable must be protected against external influences based on the required load. Routes leading outside road and rail traffic must be covered with soil in accordance with the valid standard STN EN 1610, i.e. up to a grain size of 22 mm. Routes leading in communication (road, track) must be concreted with concrete of class C16/20 in a thickness of 50 to 150 mm, depending on the width/depth of the excavation and the size of the cable duct.
  3. Connection of system elements: The cable is connected to the relevant elements, such as watertight transitions, and branches of different radii. The basic elements of the cable duct have cut edges with marking of insertion depth. Here, too, strict standards for functionality and reliability apply.
  4. Benefits when installing our OPI Pipelife system:

Easy installation: The OPI Pipelife system is designed to be easy to install. The modular design, smooth interior and standardized components facilitate assembly and integration into new or existing infrastructure.

Fast implementation: Thanks to high-end components and simple connections, the system can be implemented quickly. This reduces commissioning time and minimizes service outages.

Functionality check:

  1. Visual Inspection: A thorough visual inspection is done after installation. Correct placement of the cable, thorough insertion of connections and connections to system elements are verified.
  2. Camera inspection: After the visual test is carried out, a camera inspection is carried out. A camera will pass through the entire newly installed cable to inspect its interior.
  3. Cable route testing: Patency and watertightness testing is done for the cable line. The measurement can be performed by a camera test and a pressure tightness test.


  1. Fire protection: The standard version of the OPI PIPELIFE cable is self-extinguishing with a reaction to fire classification of E. We can also supply the cable in a fire-retardant version (EN 61 386-1, b., low smoke, halogen-free EN 50 267-2 - 1a 50 267-2-2.
  2. Water resistance: The OPI PIPELIFE system includes unique ROPI transition elements that ensure the protection of the cable duct against water penetration into the cable duct space.
  3. Technical approval: For the OPI PIPELIFE SYSTEM CPQ, our company has a permit for the construction of new cable lines during the modernization and construction of new railway lines, construction of tunnels and reconstruction of stations. Within the Slovak and Czech Republics, our company has already delivered many kilometers of this world-accepted cable duct.


       4. Investment protection: For your protection and security, there is product liability insurance up to the value of 2,000,000 EUR.


OPI'S MOTTO - "Do it right the first time"

The design, installation and inspection of the cable duct are key processes ensuring the reliable passage and functionality of the cable duct. Adherence to technical standards and correct procedures is essential to minimize the risk of breakdowns and ensure the long-term reliability of the entire infrastructure. Every step - from design to inspection - has an impact on the final result and functionality of the cable duct.


Why is passive fire protection of buildings important?

Properly designed and executed passive fire protection helps protect human life, property and the environment, and therefore its implementation is essential in every building.
That is why we enter the scene with a clear goal - to bring the revolutionary products of FSi Limited, passive fire protection, to the Slovak and Czech markets, which will change the rules of the game and raise safety to a new level. By becoming a supplier of top products, we add color to the image of security. We don't want to be just players, we want to be the driving force that shapes the new standard and creates a safe environment for the future. Our mission is to provide building designers, architects and building owners with innovative solutions that mean not only fire protection, but a real sense of security and peace of mind. We are proud to be a part of this journey and invite you to join us and push the boundaries together. Safety doesn't have to be limited anymore - we take it to a new level with our passive fire protection products from FSi Limited. Enter the revolutionary era of security with us!

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Here are some of the main reasons why passive fire protection is important:

Ensures the safety of residents and visitors: Properly designed passive fire protection, without the need for additional building structures, helps to minimize the risk of fire, allows people to evacuate and gain valuable time for rescuers to intervene.

Property protection: Passive protection reduces the likelihood of fire spreading and minimizes damage to buildings and public structures such as tunnels and subway networks.

Environmental Protection: Sometimes fires can cause hazardous chemicals to be released into the air and soil. Passive protection helps minimize these impacts and protect the environment from pollution.

Compliance with laws and regulations: Most countries have strict regulations and building standards regarding the fire safety of buildings. Adhering to these regulations and implementing the correct passive fire protection is key to obtaining a building permit and ensuring safety in the building.

Reduction of fire protection costs: Properly designed passive protection can in some cases reduce the costs of active fire protection systems and flexible lines. This is financially beneficial for future projects.