Calculations C
VES, LLC
Elite-RS Panel Installation Manual
VF3529-00, Revision E01.03
H-Series
96 of 146
Determining the Standby-Battery Rating
This section provides guidelines for determining the standby-battery rating of the Elite-RS Panel.
Battery Rating Equation
The equation below describes the process for determining the Amp-Hour Rating of the standby-batteries:
To determine the battery Amp-Hour-Rating:
Complete the worksheets on the following pages to tabulate the total-current-load of the FACP system and to
determine the minimum Amp-Hour-Rating for the standby-batteries.
Compare the sum of currents drawn by devices of the system and compare these to the values listed in the table of
Appendix C. Select a corresponding standby-battery based on this comparison.
1
Record the standby and alarm currents of VES Devices.
2
Record the standby and alarm currents of NAC Devices.
3
Record the standby and alarm currents of Auxiliary Devices.
4
Total the standby and alarm currents of SLC 1, SLC 2, NAC 1, NAC 2, AUX 24V and 24V OUT.
5
Calculate the Total Standby Amp Hours.
6
Calculate the Total Alarm Amp Hours.
7
Determine Total Amp-Hours by adding the Total Standby Amp Hours with the Total Alarm Amp Hours.
8
Determine the minimum Amp-Hour-Rating for the battery by multiplying the Total Amp-Hours with the
Derating Factor (1.20).
9
Select a battery with a rating equal to or greater than the minimum Amp-Hour-Rating determined in step 8.
Battery Rating = ( Battery Derating Factor ) x [ ( Standby Amp Hours ) + ( Alarm Amp Hours ) ]
Or
Battery Rating = ( Battery Derating Factor ) x [ ( 24 Hours x Standby-Current ) + ( 5 Minutes x alarm current)]
Where the Battery Derating Factor = 1.2 and 5 minutes = 5 / 60 minutes = 1/12 = .0833 hours.
