Bosch FAS-420-TM Operation Manual page 57

FAS-420-TM Aspirating Smoke Detector
Emergency power calculation
The rated capacity is calculated according to the following formula:
K
n
I
Q
n
t
I
g
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.
Bosch Sicherheitssysteme GmbH
= Rated capacity of the backup batteries in [Ah]
= Standby current of an aspirating smoke detector in [A]
= Total number of connected aspirating smoke detectors
= Required bridging time in [hrs]
= Total current of all connected aspirating smoke detectors in [A]
Operation Guide
Planning | en 57
F.01U.088.878 | 4.1 | 2010.11