1 / 31

EN 60849

V. V. enaS. EN 60849. Main Requirements of. Sound Systems for Emergency Purposes. ~. ~. Alarm tone generator. ampli- fire. Line. Loud- speaker. Definitions. A Few Definitions [3] “Alarm a signal, or condition, warning of an emergency” e.g.: evacuation advice “Warning

crescent
Télécharger la présentation

EN 60849

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. V V enaS EN 60849 • Main Requirements of Sound Systems for Emergency Purposes

  2. ~ ~ Alarm tone generator ampli-fire Line Loud-speaker Definitions • A Few Definitions [3] • “Alarm • a signal, or condition, warning of an emergency” • e.g.: evacuation advice • “Warning • important notice concerning any change of status which demands attention or activity “ • e.g. hint that an emergency may happen • “Critical Signal Path • all components and interconnections between every emergency broadcast initiation point and the input terminals on, or within, each loudspeaker enclosure.” BMZ

  3. Requirements on the Apparatus’s • Concerning the manufacturer

  4. Operation Availability • Continuous Availability [4.1b] • The PA system shall be available all times • Availability within 10 seconds after supplying power to the system [4.1c] • primary or secondary power • Maximum 3 Seconds from initiation until first emergency broadcast [4.1d] • including reaction time of the detection system

  5. Emergency Priorities [4.3] • Manual Alarming/Warning/Restoration • >automatic Alarming (evacuation) • >automatic Warning • >no emergency: operational messages (e.g. for system check)

  6. Manual Intervention • If the voice alarm system is capable of operation in fully automatic mode, a manual intervention shall always be possible [4.3.2] • starting and stopping of prerecorded alarm messages [4.3.2a] • selection of appropriate prerecorded alarm messages [4.3.2b] • when using specific emergency messages, indication of which message and their relation to zones must be displayed [5.2.d] • paging by using the emergency microphone (if any) [4.3.2d] • selection of zones for prerecorded message or paging [4.3.2c]

  7. Automatic Status Indication • „A clear indication shall automatically be given at the designated control locations of:“ [5.2] • (the designated control location can be the fireman‘s microphone) • “system availability“ [5.2 a] • “power supply availability “ [5.2 b] • “any fault condition“ [5.2 c] • systems with several zones: current message broadcast into which zones:Alert, Evacuation, paging

  8. Failure Indication (1) • Indication of Failures [5.3] • Failures must be indicated automatically at an designated place (e.g. main system) • The failure shall be indicated within 100 seconds after occurrence. • The failure shall be indicated acoustically and visually. • A receipt button and a Reset button must be available.

  9. Failure Indication (2) • Indication [5.3] • Visual and acoustic indication • tone of 0.5 seconds duration, min. once within 5 seconds • permanent or flashing visual indicator • Manual reception by personal • tone disappears • visual indicator remains / changes to permanent on • Reset of failure indication after failure recovery • visual indicator extinguishes automatically - or - • visual indicator extinguishes after manual Reset • visual indicator shall extinguish after failure recovery ! • Acoustic tone must start again when other failure detected

  10. Surveillance (1) • An automatic Surveillance must indicate each detected failure • The surveillance system tests • Components of the “critical signal path “ (sources, amplifiers, cables etc.) • the power supply • primary supply [5.3a] • secondary supply [5.3b] • battery charger [5.3c] • failure of protection circuits which may prevent the an emergency broadcast • e.g. fuse, circuit breaker, isolator [5.3d] • control circuits (processor etc.)

  11. Surveillance (2) • Failure of elements of the critical signal path • failure of microphone [5.3e] • (voice coil, pre-amplifier, wiring) • failure of the critical signal path through amplifiers [5.3f] • missing of amplifiers or critical modules [5.3g] • failure of standby amplifier[5.3h] • failure of tone generator or message memory [5.3i] • failure of speaker circuits[5.3j] • (short circuit, break) • failure of connection between decentralised systems [5.3 o] • failure of connection between PA system and emergency detection system • usually this surveillance is done by the emergency detection system [5.5]

  12. Monitoring of the Microphone • Methods of Microphone Monitoring • electrical monitoring : • Disadvantage: conversion from sound to voltage can not be monitored, e.g. when the diaphragm is damaged • Acoustic monitoring • a speaker send an acoustic signal to the capsule • the acoustic and electric function of the capsule is monitored  very safe method !

  13. audio + pilot tone (low frequency) Monitoring Speaker Circuits (1) • 1. Impedance Monitoring (used often) impe-dance measuring • connection of different 100 volts speakers possible • star wiring possible • expansion of old systems possible

  14. audio + test signal (high frequency) Monitoring Speaker Circuits (2) • 2. Loop Back pilot tone detector • connection of different 100 volts speakers possible • line must be installed from speaker to speaker • line back necessary

  15. end of line unitEOL audio + pilot tone (high frequency) pilot tone detector, EOL receiver Monitoring Speaker Circuits (4) • 3. End-of-Line Check • connection of different 100 volts speakers possible • only single line back necessary (third wire of shield can be used if available) • line must be installed from speaker to speaker

  16. Evacuation Message Memory • Safety Against External Influence • Prerecorded messages and eventually attention-drawing signals • must be stored in a non-volatile memory (solid state memory, no mechanical devices) [4.2i] • availability must be monitored continuously • external sources shall not be able to corrupt or derange the store or its contents

  17. Requirements On The Installation • concerning the installer

  18. Interface With Emergency Detection System [5.5] • Continuous Monitoring • The communication link between the emergency detection system and the sound system is normally monitored by the emergency detection system • Notifications to the Emergency Detection System • The sound system must transfer minimum one fault information (any failure)to the emergency detection system

  19. Retaining Functions • Redundant Facilities • Retaining the Power [4.1m] • an emergency power supply must be installed always • Retaining the Broadcast [4.1g] • „Failure of a single amplifier or loudspeaker circuit shall not result in total loss of coverage in the loudspeaker area served.” • architecture of the speaker circuit • configuration power amplifiers • Exception: regional directives for small buildings

  20. Emergency Power Supply • Battery’s Capacity [5.6] • Loss of AC mains at evacuation: • double evacuation time • minimum 30 minutes for emergency mode • Loss of AC mains without evacuation : • minimum 24 hours (normal operation) • When a building is not used for a longer period (e.g. weekend), then the system must be capable to operate the emergency mode for minimum 30 minutes after re-occupation of the building(e.g. 72 hours standby plus 30 minutes emergency mode)

  21. A B standby switch line cut switch standby amplifier Retaining of Broadcast (1) • Electrical Solution: A/B-Wiring • Two-Line System • In case of failure of one line, the other line still serves the remaining speakers A/B-wiring with 2 amplifiers A/B-wiring with standby amplifier

  22. A B A B Retaining of Broadcast (2) • Acoustic Solution: • Connection of speakers by turns on the lines A and B in each direction • In case of a line’s failure, the speaker area keeps served adequate (small gaps of coverage only) Example: wide area Example: corridor

  23. sound pressure level 120 dBA maximum level of att. drawing 6 - 20 dBA background noise 75 dBA minimum rest areas 65 dBA minimum Sound Pressure Level • Attention-Drawing Signals[Annex C] • minimum: 65 dBA, in rest areas: 75 dBA • 6 - 20 dBA above background noise • maximum: 120 dBA • the sound pressure levels of all relevant areas must be confirmed and being documented [7.2 a] z.B. 100 dBA z.B. 90 dBA

  24. Intelligibility • Intelligibility of Messages • The Intelligibility of messages must be equal or higher than 0.7 CIS (common intelligibility scale; STI: 0,5) [5.1] • This value must be obtained in each area [5.1] • In a difficult acoustic environment, it is preferable to carry out an acoustical simulation • Measuring and Documentation of Intelligibility • Confirmation of intelligibility must be documented [7.2 a] • Application of acknowledged with restrictions [Annex A] • Correlation curves to CIS in [Annex B] • A specialised company may measure the intelligibility

  25. Alarm Signals • Attention-Drawing Signal • minimum one suitable attention-drawing signal before message (refer to EN 457) [4.1 e] • Distinguishable attention-drawing signals at different emergency cases [4.1 h] • Attention-Drawing Signals and Messages [4.1 h] • attention-drawing signal before message, 4-10 seconds • duration of attention-drawing signal and messages until change or end of evacuation • max. 30 seconds between different messages • pauses > 10 seconds: attention-drawing signal

  26. Documentation (1) • Operation Manual [7.1] • must be quickly available(preferable at each operation place) • Contents: • practical operation of the system • action to be taken in case of system failure • Performance • graphically if possible • in preferred language • bound document (copy)

  27. Documentation (2) • System Documentation [7.2a] • To be kept by User or Maintenance Company • Contents: • locations of each part of the devices • measuring results of the system • Impedance of each speaker circuit • set values (when adjustable, e.g. volume) • sound pressure level(s) • intelligibility

  28. Documentation (3) • Maintenance Instructions [7.3.2] • To be kept by User or Maintenance Company • Contents: • Maintenance procedures (order of works) • Maintenance intervals • Parts for maintenance, spare parts, special tools • Suppliers • eventually test certificates

  29. Requirements on the Operation • concerns the user

  30. Documentation (4) • Log Book [7.2b] • Responsible person must take care on it • Contents: • details of all emergency cases • details of tests and routine checks • details of occurred failures and the repair

  31. Security of Operation • Maintenance [7.3.1] • should be done twice a year (maintenance and test) • to be carried out by competent person • Responsible person [4.2] • nominated by owner • is responsible for maintenance • must be trained • manages the log book

More Related