9 Battery Calculation - Zircon EN54 Installation & Configuration Manual

EN54 & ISO 7240 2-8 Zone Conventional Fire Panel - Installation & Configuration Manual
*
Ensure that any current taken from
the Auxiliary output through the relay
circuits are included in the 'Auxiliary
equipment' boxes for alarm and
quiescent.
997-532-000-1, Issue 1
March 2006
9 Battery Calculation
The table in Section 6.4.1 Standby Batteries can be used
to select the correct battery size. If full calculations are
required use the procedure below.
General Data
PSU size Maximum
No. of sounder
Circuits
1.8A
Standby Load (Amps)
Standby Load in Amps
Basic panel
Device quiescent current
(max 2mA per zone)
EOL Current (per zone) -
fitted with Resistor EOL
Auxiliary equipment *
Total Standby Load (L1)
Peak/ Alarm Load (Amps)
Standby Load in Amps
Basic panel
Zones alarm current
Optional 2-way Relay PCB
Optional 8-way Relay PCB(s) 0/ 1/ 2
Sounder output 1
Sounder output 2
Auxiliary equipment *
Total Alarm Current (L2)
Calculation
C = 1.25 {(L1 x T
min
= 1.25 x .................................. A
= ........................................... Ah
Next available battery ........................... Ah
T = Standby time in hours, e.g. 24, 72, etc.
1
T = Alarm time in hours.
2
This formula calculates the battery capacity required to
provide the specified standby period plus half-hour alarm
load in accordance with BS5839 Part 1 and LPS1014.
36
Maximum
External
Alarm Load
2 1A
No. Current
1 0.034
0.0056
Qty Current
1 0.034
2/ 4/ 8 0.03
0/ 1 0.04
80.1
Total <1.8A
) + (2 x L2 x T
1
Internal
Battery Size
Range
1.6 - 7Ah
Total
0.034
Total
0.034
)}
2