Fire Alarm Panel Battery Calculations

The standards state that in the event of a mains supply failure the backup batteries should be able to run the system for a minimum of 24hrs followed by 30minuites in full alarm condition all sounders running.

Fire alarm panel battery calculations.

Current draw must not exceed 1a aux output 2 non battery backed up. Hi guys i am confused regarding the battery calculation of fire alarm detection system. If the second approach is used the quantities of initiating devices and notification appliances is important only for determining the number of modules and circuits that will be provided to accommodate them. Please note that is calculator is for fire alarm systems and can be used with fire panels en54 power supply units and all other ancillary fire alarm equipment with 2 x 12v standby batteries wired in series.

Current draw must not exceed 1a and does not affect battery capacity total system load. Fs tools has been updated to include newly released products and makes it easier than ever before to program new features. All fire alarm systems must be fitted with a standby supply and this is achieved by using sealed lead acid sla batteries. Fs tools expands on the previous ps tools platform and is required for programming the es 50x and es 200x panels.

Take the total standby current and multiply by 24 hours for standby take the total alarm current and multiply by 083 for 5 minutes or 249 for 15 minutes of alarm add the total of standby current x 24 to alarm current x 083 or 249 multiply the total of above by a safety factor of 1 2. Aux output 1 battery backed up. Addressable panels battery calculators. Es line of fire alarm control panels.

C min i1 x t1 i2 x 1 25 definitions and example of the above i1 standby current from the fire alarm panel 0 05 amps t1 standby time assume category l1 24 hours i2 full alarm current from panel 0 3 amps. Standby battery calculation the following formula can be used to calculate the appropriate standby battery size. Few ul listed panel manufacturers provide a sample calculation in which in alarm condition they recommend to consider only 5 or 20 of the detector to count. This calculator assumes an alarm period of 30 minutes as stated in bs5839 1.