Lucent Technologies KS-20472 - Replace or Add a String to an Existing Plant; Guidelines

Lucent Technologies Round Cell Batteries
Issue 3 December 1999 Operation and Maintenance 7 - 23
Replace or Add a String to an Existing Plant
Introduction Only qualified, trained personnel that have read and understand the
hazards described in the Safety section of this manual should perform
this work. Appropriate protective equipment must be used.
Follow the appropriate procedures in the installation section for
unpacking and preparing the batteries.
Guidelines Follow these guidelines for replacing or adding a string to an existing
plant:
• Strings of Round Cells can be used in parallel with strings of
rectangular cells, providing the electrolyte specific gravities are the
same. Never mix Round Cells in the same string with rectangular
cells.
• When adding a new string in parallel to an existing string:
– Apply the initial charge to the new string only. After the initial
charge is completed, reduce the charging rectifier’s voltage to the
float voltage. Leave the new string on this rectifier for 48 hours
before it is transferred over to the working plant.
– When connecting a string in parallel with another string, see that
both strings are approximately the same potential (less than 0.05
volt difference) to prevent arcing.