Lucent Technologies Enhanced VR Series Batteries
8 - 4 Maintenance
Issue 5 December 1998
Flame Arrestor
Vent Feature
The vent and flame arrestor are maintenance free and do not
require attention under normal circumstances. However, do
NOT allow gas vents to become clogged or excessive internal
pressure may result.
Battery
Replacement
As batteries age, their characteristics change. As a general
practice it is not recommended to mix new batteries with older
batteries in a string. A weak battery in a string can cause the
entire string to fail prematurely.
However, should it become necessary to replace one or more
battery modules in a battery string, charge the replacement
module(s) according to Table 6-A. Following the initial charge,
the module(s) should be kept on continuous float at 2.25 volts
per 2VR batteries or 4.50 volts per 4VR batteries until the
replacement can be made. The time between discontinuing the
float charge and the completion of replacement should not
exceed 24 hours.
Alternatively, you may install the replacement module(s) in the
string and then give it (them) an initial charge using a portable
charger for the full length of time given in Table 6-A. When you
replace a battery module in an existing string, you can transfer it
without removing the string from the plant bus. Connect a
12-volt automotive battery in parallel with the 12-volt group that
brackets the defective battery, using a suitable length of cable.
This method is demonstrated in Figure 8-1 for 2VR375E
modules installed in a SLC framework.
Note
To insure maximum battery performance, do not mix
Lucent Technologies Enhanced VR Series batteries with
other types of batteries.
Caution
Make sure the batteries are at equal float charge before
connecting them into a string.
