FAS-420-TM Aspirating Smoke Detector Planning | en 57
Bosch Sicherheitssysteme GmbH Operation Guide F.01U.088.878 | 4.1 | 2010.11
Emergency power calculation
The rated capacity is calculated according to the following formula:
The factor 1.25 used in the formula is only applicable with bridging times ≤ 24 hours.
The "Fire System Designer" (FSD) enables case-specific calculations to be carried out for
planning Bosch LSN improved version fire panels.
K
n
= Rated capacity of the backup batteries in [Ah]
I
Q
= Standby current of an aspirating smoke detector in [A]
n = Total number of connected aspirating smoke detectors
t = Required bridging time in [hrs]
I
g
= Total current of all connected aspirating smoke detectors in [A]
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