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EXPro Installation Manual
EXAMPLE BATTERY SIZE CALCULATION
Consider a system consisting of:
st
4x 1
stage alarm Maxitone sounders
nd
4x 2
stage alarm Maxitone sounders
The system requires a 48hour standby time
The first stage alarm sounds for a minimum of 30 minutes
The bottle output activates 1A for 5 minutes
I
SBY
T
SBY
I
ALM
T
ALM
I
BOT
T
BOT
Battery size
7.2Ah batteries would be suitable for this installation
Approved Document No: GLT-212-7-1
Issue: 1.7 Author: MF/NRPJ Date: 05/07/2021
www.acornfiresecurity.com
= 57mA
= 0.057A
= 48h
= Premier EXPro Alm + 8x Maxitone Sounder + 1 detector in alarm
= 110mA + (8 x 25mA) + 40mA
= 0.110A + 0.2A + 0.04A
= 0.35A
= 0.5h
1A
=
= 0.084h (5 minutes)
= 1.25 x [(I
x T
) + (I
Q
Q
ALM
= 1.25 x [(0.057 x 48) + (0.35 x 0.5) + (0.084 x 1)]
= 1.25 x [2.736 + 0.175 + 0.042]
= 1.25 x 2.953
= 3.69Ah
www.acornfiresecurity.com
x T
) + (I
x T
)]
ALM
BOT
BOT
Page 27
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