Battery Calculation Worksheet - Altronix AL802ULADA Installation Manual

Device
For each device use this formula:
AL802ULADA
(Current draw from battery)
A
Auxiliary Devices
B
C Notification Appliances Current must not exceed 8A (8000mA)
D Total alarm current
E Total current ratings converted to amperes (line D x 0 .001)
F Number of standby hours (24 for NFPA 72, Chapter 1, 1-5 .2 .5) .
G Multiply lines E and F .
Alarm sounding period in hours .
H
(For example, 5 minutes = 0 .0833 hours .)
I Multiply lines E and H .
J Add lines G and I .
Multiply line J by 1 .30 .
K (30% extra insurance to meet desired performance)
Total ampere - hours required
Units are capable of recharging 36AH battery max . If total ampere - hour required exceeds 36AH,
decrease AUX current to provide enough stand-by time for the application .
- 8 -

Battery Calculation Worksheet

Number of
Devices
This column x This column =
Stand-by:
1
Alarm:
AL802 Current
Refer to device manual for current ratings .
Alarm/Stand-by
Alarm/Stand-by
Alarm/Stand-by
Auxiliary Devices Current (must not exceed 1A)
Refer to device manual for current ratings .
Alarm:
Alarm:
Alarm:
Alarm:
Total stand-by
Total alarm
Total stand-by and alarm
Current per Device
Equals
90mA
175mA
mA
mA
mA
mA 0mA
mA 0mA
mA 0mA
mA 0mA
0mA
AH
AH
AH
Stand-by Alarm
Current Current
Current per number of devices .
90mA
175mA
90mA 175mA
mA
mA
mA
mA
A
H
AH
AH
AH
AL802ULADA
mA
mA
mA
mA
mA
mA
mA
mA
mA
A
H
AH