Final Assembly Check Procedure
1. For future identification of all cells, number individual cells in
sequence, beginning with number one (1) at the positive end
of the battery. The last cell of the battery string is located at
the negative output terminal.
2. Read and record the voltages of the cells to assure that they are
connected properly. The total battery string voltage should be
approximately equal to the number of cells connected in series
multiplied by the measured voltage of one cell. If the measure-
ment is less, recheck the connections for proper polarity. Verify
that all cell and battery string connections have been properly
torqued.
3. Measure and record the intercell connection resistance using a
micro-ohms meter. This helps determine the adequacy of initial
connection installation and can be used as a reference for future
maintenance requirements. Refer to the recording forms in
Battery Maintenance Report of this manual. Review the records
of each connection and detail resistance measurements. Clean,
remake, and re-measure any connection that has a resistance
measurement greater than 10% of the average of all the same
type connections (i.e. intercell, intermodule, etc.).
4. Battery string performance is based on the output at the bat-
tery terminals. Therefore, the shortest electrical connection
between the battery system and the operating equipment
results in maximum total system performance.
Select cable size based on current carrying capability and
voltage drop.
Cable size should not provide a greater voltage drop between
the battery string and operating equipment than required.
Excessive voltage drop in cables will reduce the desired reserve
time and power from the battery string.
Cable sizing is the responsibility of site electrical engineer.
SYSTEM OPERATIONS
Charger Voltage
2.25 V per battery ± 0.01 @ 77°F (25°C)
When setting the float voltage on the charger, the battery string
should be set to float at the required cell float voltage times the
number of cells per battery string. The charger must be able to
maintain the battery string voltage within ± 0.5% of the desired
level at all times.
Charge Current
Charge current should not exceed the recommended minimum
and maximum requirements as detailed in Appendix B.
Temperature Compensation
Battery voltage should be adjusted for ambient temperature
variations.
2mV per °C (1.8°F) per 2V cell.
Consult
Voltage Compensation Chart (Appendix B)
for
temperature compensation voltage maximum and minimum limits.
6
Cell Voltage
Although the charger must maintain the battery string voltage
within ± 0.5%, individual cell voltages may vary by ± 0.05 volts
of the average cell float voltage.
Equalizing
Upon installation of the battery string, an optional charge at a
constant voltage equal to 2.40V per cell ± 0.01 @ 77°F (25°C)
for a maximum of 24hrs may be performed. (NOTE: Verify that
the higher cell voltage will not adversely affect any other con-
nected equipment). If this is done, be sure to reset the charging
equipment to the proper float voltage.
Battery Operation
Battery string operating temperature will affect battery string
capacity and operating life.
Temperatures greater than 77°F (25°C) will reduce the operating
life of the battery. For every 13°F (7°C) increase in operating
temperature above 77°F (25°C), the warranty period will be
proportionally reduced by 50% as shown below:
It is not recommended to operate the battery string above 95°F
(35°C). If operating temperatures are expected to be in excess
of 95°F (35°C), contact East Penn for recommendations.
Operating a battery string over 105°F (40.5°C) for more than
8 hours may void warranty.
Discharging at temperatures less than 77°F (25°C) will reduce
the capacity of the battery and require longer charging time
to become fully charged.
If operating temperatures are
expected to be less than 50°F (10°C) contact East Penn for
trecommendations.
The battery string must be located in a manner that the individual
cells do not vary by more than 5°F (2.8°C) between the lowest
and highest individual cell temperature.
Operating Temperature
ºF
ºC
77º
25º
100%
81º
27º
80%
87º
30º
60%
90º
32º
50%
Proportional Percentage
(%) of Life
Содержание AVR45 Series
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