Steel Transformer Security Doors

SilentDoor Rw® Sentinel Ultra

High level security door


Model Reference: SD-STR

The SilentDoor Rw® Sentinel TR is a highly specialised doorset thoughtfully designed specifically for use in transformer rooms, which have unique requirements due to their critical role in energy distribution. This innovative doorset provides essential protection not only for the sensitive equipment housed within these spaces but also for the personnel who may work nearby. Available in both single-leaf and double-leaf configurations, the Sentinel TR seamlessly combines robust security with impressive energy efficiency, ensuring that it meets the diverse needs of modern utility spaces. Additionally, its array of safety features makes it an ideal choice for environments where safeguarding critical infrastructure is absolutely paramount, thereby enhancing both operational efficiency and overall safety.


Key Features of SilentDoor Rw® Sentinel TR


  • RC2 Security Rating: The SilentDoor Rw® Sentinel TR meets the Resistance Class 2 (RC2) standards, offering reliable protection against forced entry attempts. This security level is particularly important for transformer rooms, where access control and the protection of sensitive electrical equipment are crucial.
  • Energy Efficiency: The doorset is engineered to contribute to the overall energy efficiency of the facility, with thermal performance options of:
  • <2.0 W/m²K: Suitable for general thermal insulation, helping to maintain stable temperatures within the transformer room.
  • <1.7 W/m²K: Enhanced thermal efficiency, ideal for minimising energy loss and supporting the optimal operation of equipment in temperature-sensitive environments.
  • Safety and Protection: The SilentDoor Rw® Sentinel TR is designed to protect both the transformer room and the surrounding areas, ensuring that nearby equipment and people are safeguarded from potential hazards.


Suitable applications (recommendations are as follows)


SilentDoor Rw® Sentinel TR

  • Utility Buildings: Essential for transformer rooms in power plants, substations, and industrial facilities where securing electrical equipment and controlling access is vital.
  • Commercial and Public Buildings: Ideal for use in transformer rooms within large commercial complexes, hospitals, and educational institutions, where safety and security are of utmost importance.


Learn more on how much 5dB makes a difference, when choosing a SilentDoor RW® HERE

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