Lucent Technologies Victory Class Batteries WP-93936
Issue 1 May 2000
Installation 6 - 25
Checking Connection Integrity
Introduction
Initial cleaning, surface preparation, and torquing establishes the
lowest possible resistance between posts, connectors, and lugs, all of
which may have somewhat irregular surface finishes.
Maintain clean, tight connections. Periodically check torque values or
connection resistance. Connection maintenance is the responsibility of
the user.
The preferred method of checking connection integrity is by using a
digital low-resistance micro-ohm meter (DLRO) and recording the
resistance values of each connection. Remake any connection that is
more than 10 percent above the average value or 5 micro-ohms,
whichever is greater, for new installations. Refer to IEEE-450 and 484
professional standards.
Procedure
1. After connecting and torquing all cells in the battery and prior to
connecting to the charger or dc system, recheck the torque of all
connections, in sequence.
2. Immediately check the total voltage of the battery, using a digital
dc voltmeter. Total battery voltage should equal the open circuit
voltage (2.06) of an individual cell multiplied by the number of
cells in series connection. If the battery voltage is less than this
value, either the voltmeter is incorrect or one or more of the cells
is installed in reverse polarity.
3. If necessary, check and correct cell polarities. Making this
correction will avoid the possibility of charging cells in reverse
and destroying them.
Caution
It is the sole responsibility of the user to check connections. All
connections should be checked at regular intervals to ensure the
connections are clean and tight. Never operate a battery with loose or
corroded connections. When restoring connections, disconnect the
battery from the load and the charging equipment and follow all the
precautionary measures outlined above.
