Battery Calculations - Fike SHP 10-051 Product Manual

FIKE CORPORATION
APPENDIX 1

BATTERY CALCULATIONS

The SHP is designed for use with either of two battery packs. Each battery pack contains two 12V batteries
which can be installed in the SHP enclosure. Battery back-up duration must be extended for sprinkler
supervisory systems. Minimum battery capacity must exceed (by more than 10%) normal operation power
followed by alarm operation power for these durations:
Operation Type
Local & Sprinkler Supervisory
Auxillary or Remote Station
Local Operation Only
Each battery pack's maximum current consumption for normal operation is:
Battery Pack
10-2190-1 7 Amp-Hour Battery Pack
10-2190-2 18 Amp-Hour Battery Pack
"Total normal current" and "total alarm current" can each be calculated as the sum of:
A.) SHP controller current
B.) SRM4 current for relays activated while in alarm
C.) Output current to activated indicating devices.
D.) Auxiliary current from Aux Power Out circuit.
Module Type:
10-2171 Controller
10-2172 Class-A Module
10-2176 SRM4 Module
Normal operation power (in Amp-Hours) = (total normal current) X (24, 60, or 90 hours).
Alarm operation power
The selected battery capacity must exceed the sum of the Normal and Alarm power plus a 20% battery
power derating safety margin to ensure adequate system voltages are maintained. If using an
uninterruptable power supply that supplies power in excess of the above time durations; NFPA 72 allows
lesser amounts of system internal battery capacity.
NOTE: The SHP 0.090 Amp current includes power to activate the normally energized trouble relay
and power for the maximum number of two wire detectors. The SRM4's 0.100 Amps alarm current
is for the activated relays.
The following page includes a battery calculation form and illustrates a typical battery calculation example.
UL S2203
FM 0Z8A0.AY
Normal Operation
90 hours
60 hours
24 hours
---Max Normal Operation Current---
Description 24 hour back-up 90 hour back-up
0.260 A
0.590 A
Module Current Consumption
0.090 Amps
0.000 Amps
0.000 Amps
= (total alarm current)
SHP Product Manual
Manual P/N: 06-130
firealarmresources.com
Alarm Operation
5 minutes
5 minutes
5 minutes
Not applicable
0.171 A
(0.100A while in alarm)
X (0.0833 hours).
Page 37 of 43
Rev. No: 3, 04/02
APPENDIX 1