VESDA-E VEP-A00-P Product Guide
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41
4.3.12 Specify Backup Battery
In the event of a mains power supply disruption, the VEP-A00 detector runs on a backup battery located in the
external power supply (the power supply must be compliant with local fire protection codes and standards).
The size of the battery is determined by:
l
local codes and standards
l
the total power required by the system
l
back up time required
l
allowance for reduction in capacity with age
l
expected temperature variations
Note:
It is recommended that batteries be inspected and changed as per manufacturer’s specifications or
as per local codes and standards.
To facilitate the calculation of the backup battery size, a Battery Calculation Sheet is included below.
Equipment
Normal loads @ 24 V DC
Full alarm load @ 24 V DC
Load (A)
Qty
Total
Load (A)
Qty
Total
Detector set to Fan Speed 1
0.29
0.33
Detector set to Fan Speed 5
0.37
0.40
Other 24V Loads
Total
(A)
Total
(A)
X
X
Normal Hours
Alarm Hours
=
Normal Capacity
Alarm Capacity
Total Capacity =
Alarm
Multiply by battery
factor X1.25
Table 4-3: Calculating the size of backup battery
Содержание VESDA-E VEP-A00
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