Lucent Technologies Enhanced VR Series Batteries
6 - 8 Installation Issue 5 December 1998
Placing a
Battery String
Into Service
Batteries should be in service within 48 hours of initial charge.
If a battery is left on open circuit for more than 48 hours after the
initial charge, treat it as if it had never received an initial charge.
Since battery performance is based on the output at the battery
terminals, the shortest electrical connection between the battery
system and the operating equipment results in the maximum
total system performance.
Cable size should be specified and installed that will maintain
appropriate voltage drop between the battery system and the
operating equipment. Excess voltage drop will reduce the
desired reserve time of the battery system.
When paralleling valve-regulated batteries, the capacity,
arrangement, and external circuit length should be identical for
each battery. Wide variations in the battery circuit resistance can
result in unbalanced charging (i.e., excess charging current in
some batteries and undercharging in others). As a result, cell
failures in one battery string and subsequent loss of performance
capabilities of that string will result in higher loads in the other
parallel string(s), which may exceed the ratings of the battery
connections. This can damage the battery and dramatically
shorten battery life.
Installation
Records
The “Installation and Maintenance Record” (see Section 10) is
required for warranty validation. The installer should use this
form to record the following measurements.
Voltage
Measurements
Before connecting parallel strings together or individual strings
to the plant bus, make the following voltage measurements:
1. Measure individual battery voltage. Replace any 2VR250
or 2VR375 battery with a voltage less than 2.0 volts or any
4VR125 battery with a voltage less than 4.0 volts.
2. Measure across the string to verify that the batteries are
connected properly and that the polarity is correct. The
string voltage should be equal to the sum of the individual
battery readings recorded above.
3. Measure across the plant charge and discharge battery
buses. The voltage difference between the string and plant
should not exceed 0.05 volts unless the plant is at 0 (zero)
To Next Page
Loading...