What is BS EN 54-28 – Non-resettable line-type heat detectors about?
BS EN 54 is a European Standard that deals with fire detection and fire alarm systems. It aims to establish operationally efficient safety equipment and systems that play a positive role during a fire emergency.
BS EN 54-28 is the 28th part of the series that applies to non-resettable line-type heat detectors consisting of a sensing element using an electrical sensor cable that can be connected to a sensor control unit or either directly or through an interface module to control and indicate equipment intended for use in fire detection and fire alarm systems installed in and around buildings and civil engineering works.
The non-resettable sensing element has a fixed temperature alarm threshold and does not distinguish between short circuit and alarm conditions.
Non-resettable line-type heat detectors with special characteristics and developed for specific risks are not covered by this BS EN 54-28.
Who is BS EN 54-28 - Non-resettable line-type heat detectors for?
BS EN 54-28 on non-resettable line-type heat detectors is relevant to:
- Manufacturers of fire detection and fire alarm system
- Manufacturers of NLTHD
- Fire safety engineers
- Fire safety department
- Alarm receiving centres
- Insurers
- Local authorities
Why should you use BS EN 54-28 - Non-resettable line-type heat detectors?
Non-resettable line-type heat detectors (NLTHD) have been used for a considerable number of years and are incorporated into fire detection systems and in some countries even into fire alarm systems if accepted by the relevant authorities. These detectors are typically used in areas where point type heat detectors are presented with challenging environmental characteristics and also, where access to the detectors, may significantly influence the fire alarm system design. BS EN 54-28 defines the minimum system functionality for NLTHD products.
Generally, NLTHD operate on using the same basic principle. However, they can have different
performance with respect to the temperature response. Therefore, they have been differentiated in BS EN 54-28 by a type code which reflects the nominal alarm temperature, the tolerance range and the maximum ambient temperature at which they could be used.
BS EN 54-28 specifies the requirements and performance criteria, the corresponding test methods and provides guidance for the Assessment and Verification of Constancy of Performance (AVCP) of non-resettable line-type heat detectors.
Overall, BS EN 54-28 can demonstrate the reliability and performance of NLTHD, thus playing a positive role in the optimal performance of fire detection and fire alarm systems, for a successful emergency response.
