Cable Specifications
Installation Handbook, Autroprime Interactive Fire Detection System, 116-P-APRIME2-INSTAL/DGB, Rev. C, 2016-29-02,
Autronica Fire and Security AS
Page 24
8.5 Calculation of Power Consumption and Cable Loss
The fuses determine the maximum power load. The 24V cabling
should be dimensioned according to the power consumption and
the smallest voltage during load.
CAUTION
8.6 Power Supply and Battery Capacity
The battery capacity must be calculated according to the total
power consumption all units require in case no mains power is
supplied. Note that national/local requirements for battery backup
may vary.
General Rules
Add all power loads in the Quiescent condition. The total current
consumption should then be multiplied with the required hours of
battery backup (typically 24 hours).
Then add the additional load in Alarm condition. As above, multiply
by the hours required for this condition (typically 0,5 hours)
The total required battery capacity which is now found needs a
margin of about 15 % for the life cycle of the battery.
In addition, the total current supplied by the fuses +24V Out1 and
+24V Out2 shall be safely below the 1.0A limit. The available total
current from the charger is 5,0A, and care must be taken to ensure
that the total charging current together with the overall load does
not exceed 5,0A. Also, the charging current available shall be
capable of charging the batteries fully within 24 hours.
Example
(24 hours Quiescent con 0,5 hours Alarm condition)
Consumers
Quiescent
(mA)
Alarm (mA)
Quiescent 24
hours (Ah)
Alarm 0,5
hours (Ah)
Total (Ah)
BS-200
200
310
4,80
0,16
4,96
200 detectors
60
90
1,44
0,05
1,49
30 loop units
9
180
0,22
0,09
0,31
Panel Bus
BU-210
20
60
0,48
0,03
0,51
BV-210
20
60
0,48
0,03
0,51
Sounders
Output 1, 10
pcs
0
200
0
0,10
0,10
Sourcing of power shall only be supplied via the fused outputs
(+24V Out 1- and Out 2) from the Fire Alarm Control Panel.
Connecting to battery or charger is not allowed as the control
of the charger voltage and current will become malfunctional.
!
Summary of Contents for Autroprime
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