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USER MANUAL
DCM000000008
Printed: 00.03.22,09:08
Revision Date:3/22/00
10
Battery Requirements:
•
One 24V Battery is required for each Card-cage (usually consisting of two 12V
batteries).
•
The battery must be a Sealed Lead Acid type (often called Gel Cell).
•
Batteries must be installed in a ventilated area in accordance with the
manufacturer’s instructions.
•
If a longer cable assembly is required, contact the KAVAL TELECOM INC. factory
by E-mail: info@kaval.com.
•
For battery capacity in Amp Hours (A-H) see section “Battery Sizing” below.
•
For charging time for batteries, in hours, see chart below.
•
If batteries are stored (not connected to the system) they should not be left in a
low state (discharged) for more than a few days, or they will permanently lose
capacity, and no longer be able to run the system.
•
If it is desired to be able to recharge the batteries at a rate faster than is inherent
in the power supplies internal system, then it is possible to use an external
charger. Consult the KAVAL TELECOM INC. factory for details at E-mail:
info@kaval.com
Battery Sizing
The size or capacity of the external lead acid batteries is dependent on two
variables: The number of modules installed in the Card-cage and the desired back
up period in hours. The relationship is defined by the following equation:
15
...)
3
2
1
5
(
+
+
+
+
×
=
p
p
p
T
C
Where:
C
IS
The required battery capacity in Amp Hours (A-H)
Note: the calculation is for each of the two 12V batteries required to make up the 24V
requirement
T
IS
The desired back up period in hours
Px
IS
The power consumption in watts for each plug in module in the Card-cage,
(Not counting the Power Supply Module)
Example of calculating the battery capacity:
To find the capacity in Amp Hours (C) for a system with three OFR800 modules,
where a 3-Hour reserve (T) is required.
Let:
T =
3
hours
Px
=
45 watts (the power requirements of the OFR800 Module from its spec sheet)
Therefore the required battery capacity in A-H would be:
