
17
Formulas
Table 4
provides the formulas to calculate battery requirements.
Table 4.
Battery calculation formulas
Formula
Calculation
Result
1
Total standby current x Conversion factor x Required hours in standby
mA x .001Amp/mA x hours
Ah standby Amp-hours
2
Total alarm current x Conversion factor x Required minutes in alarm x Conversion factor
mA x .001Amp/mA x minutes x .0167 hours/min.
Ah alarm Amp-hours
3
Total active current x Conversion factor x Required seconds active x Conversion factor
mA x .001Amp/mA x seconds x .000278 hours/sec.
Ah active Amp-hours
4
Standby Amp-hours + Alarm Amp-hours + Active Amp-hours
+ +
Minimum battery power
required
Ah
5
Minimum battery power required x Battery capacity derating coefficient
x 1.15
Total standby battery
required
Ah
Summary of Contents for Alliance AL-4017
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