Emergency Power Supply - Siemens Cerberus CS1140 Planning

33

Emergency power supply

33.1 Specifying battery capacity
33.2 Capacity values for standard configurations
Configuration CS1140 Configuration CS1140
CI 128 detectors interactive
128 detectors AnalogPLUS
16 collective lines
CC 512 detectors interactive
512 detectors AnalogPLUS
64 collective lines
Notes:
– equipped with 1 operating unit AlgoPilot B3Q...
– discharge over a 12-hour period, 9% loss of capacity taken into account
– factor 1.25 for ageing taken into account at 12h and 24h (72h without safety factor)
– without remote transmission equipment
– only quiescent current taken into account
– quiescent current for additional battery charging module E3C011 taken into account (where necessary Q)
Fire & Security Products
Siemens Building Technologies Group
Battery rated capacity
The battery rated capacity is based on the discharge over a period of 20 hours
Faster discharge causes a loss of capacity:
ü
discharge over 12-hour period:
Ageing of battery
With increasing age, the battery suffers a loss of capacity
ü
Allow a safety factor for ageing
(Total quiescent current × 1.25 or battery capacity × 0.8)
> 24h in conformity with DIN VDE 0833, part 2, no safety factor is necessary
Calculation
Battery capacity must be calculated individually!
Formula: Ah = A × h × 1.25 (poss. × K)
Ah = Battery capacity in Ah
A = The sum of the quiescent current for all modules
h = Required operating period in hours
1.25 = Safety factor for ageing
K = Capacity loss if discharge is over considerably less than 20 hours
Quiescent Quiescent
7 outputs
7 outputs
7 outputs
704mA Q
32 outputs
32 outputs
924mA Q
32 outputs
9% loss (K = 1.1)
Battery capacity requirement for
current current
12h
260mA 4,2Ah
235mA 3,8Ah
315mA 5,1Ah
11,6Ah
454mA 7,4Ah
15,2Ah
24h 72h
7,8Ah 18,7Ah
7,0Ah 16,9Ah
9,4Ah 22,6Ah
21,1Ah 50,6Ah
13,6Ah 32,6Ah
27,7Ah 66,5Ah
e4595e 33
05.2003
91