151343
4-8
Table 4-2: Battery Calculation Worksheet
Device
Number of
Devices
Current per Device
Standby
Current
Alarm
Current
For each device use this formula:
This column
X This column
=
Current per number of devices.
HPF902ULADA Distributed Power
Module
(Current draw from battery)
1
Standby:
75 mA
75 mA
Alarm:
205 mA
205 mA
A
HPF902ULADA Current
75 mA
205 mA
Auxiliary Devices
Refer to device manual for current ratings.
Alarm/Standby
mA
mA
mA
Alarm/Standby
mA
mA
mA
Alarm/Standby
mA
mA
mA
Alarm/Standby
mA
mA
mA
B
Auxiliary Device Current
mA
mA
Notification appliances
Refer to device manual for current ratings.
Alarm:
mA
0 mA
mA
Alarm:
mA
0 mA
mA
Alarm:
mA
0 mA
mA
Alarm:
mA
0 mA
mA
C
Notification Appliance Current
0 mA
mA
D
Total current ratings of all devices in system (line A + line B + line C)
mA
mA
E
Total current ratings converted to amperes (line D x .001):
A
A
F
Number of standby hours (24 or 60 for NFPA 72, Chapter 1, 1-5.2.5). 24 Hrs. for NBC,
section 3.2.7.8
H
G
Multiply lines E and F. Total standby AH
AH
H
Alarm sounding period in hours. In accordance with NBC and ULC.
(For example, 5 minutes = .0833 hours.)
H
I
Multiply lines E and H.Total alarm AH
AH
J
Add lines G and I.Total standby and alarm AH
AH
K
Multiply line J by 1.20.
(20% extra insurance to meet desired performance) Total ampere-hours required
AH
Summary of Contents for HPF902ULADA
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