GE ARITECH FP400 Series, Installation Manual

Page: 23 / 28

FP400 Series Installation Manual 23
Calculating battery life in standby time
bc = battery capacity (FP402, FP404) = 2.6 A/h x 80% = 2.08 Ah
bc = battery capacity (FP408, FP412, FP416) = 7 A/h x 80% = 5.6 Ah
pa = panel current in mains fault (including all EOL resistors) (mA)
pc = panel current in alarm in 1 zone (including all EOL resistors) (mA)
yy = detector current (refer to detector instruction manual) (uA)
zz = number of detectors in installation
aux = auxiliary current (mA)
Sounder = sounder current (refer to sounder instruction manual) (mA)
Table 1: Panel current in mains fault and alarm (1 zone)
pa pc
FP402 75 115
FP404 80 130
FP408 110 145
FP412 115 160
FP416 135 180
Example calculation (using FP408)
Zone 1: 15 optical detectors
Zone 2: 10 manual call points
Zone 3: 5 heat detectors
Use 50 mA on auxillary
Use 300 mA on sounders
Total current for detectors (de):
(zz x yy)
------------ = de
1000
de (zone 1) = 15 x 100/1000 = 1.5 mA
de (zone 2) = 0 (manual call point has no current in standby)
de (zone 3) = 5 x 100/1000 = 0.5 mA
de = 1.5 + 0 + 0.5 = 2 mA
Standby current (sc):
pa + de + aux = sc
pa (FP408) = 110
110 + 2 + 50 = 162
Current with 1 zone in alarm (zc):