Kidde Gemini II - Battery Capacity Calculations

A-406-235975-001 November 2002
Kidde Gemini II System
A-4 BATTERY CAPACITY CALCULATIONS
Based on the "Duration" for which battery backup is required (from section A-1) and the "Total Standby Power" and "Total
Alarm Power" values for the MCP and RHU (from Section A-3), the next step is to calculate the battery capacity in
Ampere-Hours (AH) using Tables A-4 and A-5).
Table A-4. Battery Capacity for 24-hour Standby and Five Minute Alarm Period
deriuqeRrewoPlatoTybylpitluMnoitaruDslauqE)HA(ruoH-erepmA
)spmA(ybdnatSlatoT=
xsruoh000.42=
)spmA(mralAlatoT=
xsruoh380.0
=
)musnmuloc(HAdetaluclaClatoT
=
rotcafnoitareD%011gnisuHAyrettaBderiuqeR
)1.1ybHAdetaluclaClatoTylpitlum(
=
yticapaCyrettaBdetceleS
)HA66dna21neewtebdnaHAyrettabderiuqerotlauqeronahtretaergebtsum(
=
rebmuNtraPyrettaBdetceleS
)tsiLstraP,6retpahCotrefer(
=
Table A-5. Battery Capacity for 90-hour Standby and Ten Minute Alarm Period
deriuqeRrewoPlatoTybylpitluMnoitaruDslauqE)HA(ruoH-erepmA
)spmA(ybdnatSlatoT=
xsruoh000.09=
)spmA(mralAlatoT=
xsruoh761.0
=
)musnmuloc(HAdetaluclaClatoT
=
rotcafnoitareD%011gnisuHAyrettaBderiuqeR
1
)1.1ybHAdetaluclaClatoTylpitlum(
=
yticapaCyrettaBdetceleS
)HA66dna21neewtebdnaHAyrettabderiuqerotlauqeronahtretaergebtsum(
=
rebmuNtraPyrettaBdetceleS
)tsiLstraP,6retpahCotrefer(
=
Note: The above battery capacity calculation and subsequent selection assumes that the battery is installed in ambient
room temperatures. If installed below ambient, consult the battery manufacturer for requirement of additional
deration factors not considered above.
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