BS EN50131 PDF

Some of the test methods contained within this standard have been found to be incorrectly specified. The working group responsible for the standard have developed revised tests and an amendment to the standard has been proposed by CENELEC and is anticipated. The UK committee recommends that this be taken into account when using this standard. A list of organizations represented on this subcommittee can be obtained on request to its secretary.

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A comprehensive Risk Assessment is required to determine the design criteria of the system. Applicable to both hard-wired and wireless installations. Does my existing system need to be upgraded to comply with PD? If your current system complies with the old British Standards and is working effectively changes are not required. If any upgrade to your system is undertaken your insurance company will require the system to comply with PD Security Grades One of the most important aspects of the EN requirements is the concept of a security grade.

For each installation, the grade of the system has to be chosen according to various factors. The EN the grade is described in terms of the type of intruder and how much effort they would put into a burglary. What are the Grades? The property is not likely to attract intruders.

It is assumed that a thief is likely to be opportunistic rather than bothering to plan things in advance. The property is likely to have something of interest to an experienced thief. In this case, the intruder is expected to have some knowledge of how alarm systems work and possibly carry some tools to allow him to overcome a simple alarm system.

The thief is likely to check the building for ease of access through doors, windows and other openings. There is a good reason to assume it may be broken into and might well contain objects of high value. An intruder is likely to gain access by penetrating doors, windows or other openings. Intruders could be expected to plan a burglary in advance and have the knowledge and equipment to alter parts of the intruder alarm system to prevent detection.

It is assumed that the intruder could gain access by penetration of floors, walls and ceilings. The intruder is unlikely to be working alone. What Grade of System does my installation need? This is difficult to say at the moment and opinion on this matter varies from country to country.

The view in the UK tends to require grades that are higher than other countries e. To a large degree, the choice of grade would be guided by insurance companies. A typical view though could be: Grade 1 would only be of interest in domestic properties without an insurance requirement for an alarm system.

Grade 2 would be most domestic properties and low risk commercial e. Newsagent with cigarette sales Grade 4 would be for extremely high-risk domestic and higher risk commercial properties e. Mixing Components of Different Grade The EN standard says that it is not necessary to use the same grade of component throughout an intruder system.

If the installation is a grade 2 then there is no problem using, for example, a grade 3 power supply. If however, an installer fits a grade 2 component such as a detector in a system then that system is limited to grade 2 at best.

It is possible to have a defined part of a system at a higher grade so long as all associated parts are at the same or higher grade. For example, a system combining intruder and hold-up PA functionality could have a grade 4 hold-up system whilst the intruder parts were limited to grade 3. But this example is only valid if the power supply, alarm transmission system and warning devices used by the hold-up PA parts are all grade 4.

The system as a whole is, of course, only grade 3. This is because once the grade of a system is determined it will define the extent of the system, its signalling and tamper security requirements. AlertSystems Ltd.


EN 50131 European Standards for Intruder Alarm Systems

Articles EN Grades in intruder alarm systems EN is a European standard series for intruder alarms and hold-up systems. Initially,it unifies the understanding of what an electronic alarm system is. Naturally it covers all aspects of alarm systems from authorization, redundancy, user roles, tampers to name just a few, but we will cover only the main aspects here. There are 4 intruder alarm security grades From the lowest Grade 1 up to Grade 4.


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