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Power Supplies

Fire regulations in many European countries insist that any power supply performing a mandatory function of a fire alarm system must comply with EN54-4. This also means that any power supply controlling a beam detector, auto-dial communicator, aspirating smoke detector, auto-open ventilation system or auxiliary sounder system must comply to the same standard.

Discount Fire Extinguishers have a range of cost-effective, EN54 certified switch-mode power supply units. All of which are top quality and come with fitting instructions.

 

Power Supplies Additional Information

 

  • No less than two power supplies are required for your system ie, mains and battery and these are normally built into the Fire Alarm Control Panel.
  • Any standby batteries must allow the system to operate without mains for 24 hours longer than the building is likely to be unoccupied and then support the sounders for an additional half hour. If the mains supply is supported by an emergency generator then six hours standby plus half an hour alarm load is sufficient.
  • Almost all modern Fire Alarm Systems are 24 volts.
  • On many medium and larger sized Fire Alarm Systems, the standby batteries will often not fit inside the Control Panel. In these cases standby batteries are housed within a separate unit, but this housing must be as close as possible to the main Fire Alarm Control Panel. If however the power supply or battery housing is located more than 10 metres from the main Fire Alarm Control Panel then serious voltage drop problems are likely to occur.
  • Standby batteries are Sealed Lead Acid Batteries, the use of nickel cadmium batteries is not cost effective and an automotive battery must never be fitted.

 

Along with the rest of your fire safety checks that should be carried out at regular intervals, your power supplies need to be included as part of those checks. Record books and fire safety training DVDs are also available here at Discount Fire Extinguishers.