HomeMy WebLinkAboutBattery Calcs.pdfJobsite Information:Eye Pieces of Vail--Bridge St.
The calculations below show the power load on what will be a newly installed NAC extender used
to power the notification appliances in the newly renovated office space.
Entries only to be made in the Yellow cell locations
Regulated Load in Standby
Number of Current Total Current
Device Type Devices (Amps)(Amps)
Main PC Board 1 X 0.065 =0.065
Power Supervision Relays 1 X 0.025 =0.025
Auxiliary Current Draw X =0
from TB4 Terminals 9 & 10
STANDBY LOAD =0.09
Regulated Load in ALARM
Number of Current Total Current
Device Type Devices (Amps)(Amps)
Main PC Board without AC 1 X 0.145 =0.145
Power Supervision Relays 1 X 0.025 =0.025
Auxiliary Current Draw X =0
from TB4 Terminals 9 & 10
NAC / Output # 1 X =0
SYS-SR 15 1 X 0.0071 =0.0071
SYS-SR 30 0 X 0.0076 =0
SYS-P4R 30 0 X 0.0112 =0
SYS-P4R 75 0 X 0.0168 =0
SYS-P4R 110 1 x 0.0202 =0.0202
NAC / Output # 2 X =0
NAC / Output # 3 X =0
NAC / Output # 4 X =0
ALARM LOAD =0.197
Battery Amp Hour Calculation
Standby Load Required Standby Time
Current (Amps)(Typically 24 or 60 Hours )
0.09 X 24 =2.16 AH
Alarm Load Required Alarm Time
Current (Amps)(Typically 5 or 10 Minutes )
0.1973 X 15 =0.05 AH
Sub Total Standby / Alarm Amp Hours 2.21 AH
Multiply by the Derating Factor X 1.2 *
Total Ampere Hours Required =3 AH
FCPS-24FS6 / 8 Battery Calculation
* Derating Factor required to compensate for the non-linear discharge characteristic of a battery.