Ampac ZoneSense Plus - Page 37

MAN 2326-13
37
PRIMARY POWER SOURCE CALCULATIONS
Baery Charger Current
Requirement: Baery is charged for 24 hrs. to provide 5Iq + 0.5Ia
=
( 5x Iq ) + ( 0.5 x Ia )
=
( 5x Iq ) + ( 0.5 x Ia )
=
=
( 5 x 100 ) + ( 0.5 x 390 )
=
=
500 + 195
Ah Requirement
=
Ah
=
0.695Ah
Baery Charging Current
Required
=
Ah above
=
0.695
24 x e
24 x e
e is the baery eciency,
0.8
=
A
=
.0363A
Power Supply
Requirement
Select the greater, 1 or 2
1. Ia + non- baery backed ancillary alarm loads
2. Iq + non – baery backed quiescent loads
If the power supply is used as the charger the current rang of the supply shall be [(1 or 2) + baery charger
current].
Note: Remember to take into account ALL outputs that will be switched on when calculang Ida.