Ampac LoopSense Installation And Commissioning Guide

Page 43
LOOPSENSE EN54 INSTALLATION & COMMISSIONING
PRIMARY POWER SOURCE CALCULATIONS
Battery Charger Current
Requirement: Battery is charged for 24 hrs to provide 5Iq + 0.5Ia
=
( 5x Iq ) + ( 0.5 x Ia )
=
( 5x Iq ) + ( 0.5 x Ia )
=
=
( 5 x 157 ) + ( 0.5 x 537 )
=
=
785 + 269
Ah Requirement
=
Ah
=
1.054Ah
Battery Charging
Current Required
=
Ah above
=
1.054
Where e is the battery
efficiency, 0.8
24 x e
24 x e
=
A
=
.055A
Power Supply
Requirement
Select the greater, 1 or 2
1. Ia + non- battery backed ancillary alarm loads
2. Iq + non – battery backed quiescent loads
If the power supply is used as the charger the current rating of the supply shall be [(1 or 2) + battery
charger current].
Note: Remember to take into account ALL outputs that will be switched on when calculating Ida.
Abbreviations Used
Ia: CURRENT DRAW IN ALARM
Ida: CURRENT DRAW IN ALARM WITH DEVICES ACTIVATED
Idd: CURRENT DRAW IN ALARM WITH DEVICES DEACTIVATED
Iq: QUIESCENT CURRENT

Ampac LoopSense Specifications

General

Brand	Ampac
Model	LoopSense
Category	Control Panel
Language	English