Battery Calculation; Sample Calculation - Zeta Alarm Systems Simplicity Micro Instruction Manual

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INSTRUCTION MANUAL: 32 Device,4 Zone Addressable Fire Alarm Panel
ADDRESSABLE
FIRE ALARM PANEL

Battery Calculation

Here are the current consumption of the Simplicity Micro panels in various
conditions:-
Control Panel Model
Simplicity Micro

Sample Calculation

A Simplicity Micro panel has the following items connected:-
Zone 1: 1 x MCP, 2 x Optical Detector, 2 x Sounder base
Zone 2: 1 x MCP, 1 x Optical Detector, 1 x Sounder base
Zone 3: 1 x Heat Detector, 1 x Sounder base
Zone 4: 2 x Optical Detector, 2 x Sounder Flasher base
ITEM
SIMPLICITY MICRO
MCP
OPTICAL
HEAT
SOUNDER BASE
SOUNDER FLASHER BASE
To calculate the required battery backup required, we use the equation:-
Battery Size (Standby time in Amp Hours) = 1.25 x [(T
Where:
T = Maximum time in hours required for the alarm [½ hour is most common time]
ALM
I = Total Alarm Current in amps for all alarm devices connected to the alarm circuits
ALM
T = Standby time in hours for the system after mains failure [normally 24, 48 or 72 hr]
SBY
I = Quiescent current in amps of control panel in fault condition [because of mains failure]
SBY
PLUS all loop devices.
I = (
SIMPLICITY MICRO) ALM + (4 X SOUNDER BASE ALARM) + (2 X SOUNDER FLASHER
ALM
BASE ALARM) + (1 X DETECTOR ALM) + (2 X MCP QU) + (4 X OPT QU) + (1 x
HT QU)
=0.065 + 4x 0.0055 + 2x 0.007 + 1x0.012 + 2x0.001 + 4x0.0001 + 1x0.00005
=0.065 + 0.022 + 0.014 + 0.012 + 0.002 + 0.0004 + 0.00005
=0.11545 Amps
I
= (SIMPLICITY MICRO QU) + (4 X SOUNDER BASE QU) + (2 X SOUNDER FLASHER BASE
SBY
QU) + (2 X MCP QU) + (5 X OPT QU) + (1 x HT QU)
=0.039 + 4x0.0012 + 2x0.0012 + 2x0.001 + 5x0.0001 + 1x0.00005
=0.039 + 0.0048 +0.0024 + 0.002 + 0.0005 + 0.00005
=0.04875
Therefore:-
Battery size
= 1.25 X ((0.5 x 0. 0.11545) + (24 x 0.04875))
= 1.25 X (0.057725 + 1.17)
= 1.25 x 1.227725
= 1.5346 Ah
So 2.0 Ah batteries will be suitable for this installation.
Approved Document No: GLT.MAN-129
Issue : 1.0 Author: NRPJ
Mains Fail,
buzzer sounding
39mA
QUIESCENT
39mA (in fault)
1.0mA
100uA
50uA
1.2mA
1.2mA
Date: 11/04/2008
Mains Fail, Mains fail,
buzzer silenced panel in alarm
37mA 65mA
ALARM
65mA
3.5mA
12mA
12mA
5.5mA
7mA
x I ) + (T x I
ALM ALM SBY SBY
)]
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